CN1319777C - Controller and controlling method of side mirror of automobile - Google Patents

Abstract

A controller of the side mirror of an automobile arranged such that a noise pulse signal is generated after ending generation of a pulse signal through inertial rotation of one motor by providing a specified time difference in the upward inclination starting time between the left and right side mirrors.

Description

Automobile rearview mirror control device and control method

technical field

The invention relates to a control device and a control method of a rearview mirror of an automobile.

Background technique

Generally, when reversing the vehicle, the driver operates the vehicle while checking the rear through a so-called rearview mirror. At this time, it is dangerous if there are obstacles such as curbs or gutters or pits near the rear wheels, so in order to see the bottom through the rearview mirror, there is already a system that can change the angle of the rearview mirror with an actuator. installation. However, since it is complicated to change the angle of the rearview mirror manually, and fine adjustment of the angle is also difficult, an automatic control angle adjustment device was developed.

For example, in JP2001-138812A, the following technology is disclosed: the invention of controlling the angle of the rearview mirror in conjunction with the reverse gear, that is, when the shift lever is engaged in the reverse gear, the rearview mirror is tilted by a DC motor. The main body is tilted downward, and the excess tilt generated by the inertia of the DC motor at this time is counted as the number of pulse signals generated by the rotation of the DC motor. When changing from the reverse gear to other gears, it also includes The angle of the rearview mirror body is restored by exceeding the tilting part produced by this inertia. Like this, even if the tilting operation of the rearview mirror angle is repeated many times, the rearview mirror body usually returns to the same position.

However, due to the unevenness of the ease of movement of the movable part of different rearview mirrors and the torque of different DC motors, when tilting the left and right rearview mirrors at the same time, there is a tendency to stop tilting the rearview mirror on one side. After the DC motor is supplied with power and the inertial rotation is also stopped, the DC motor on the other side is still performing inertial rotation. At this time, although the DC motor that stopped earlier does not rotate on one side, but only the pulse signal appears. Phenomenon. This case will be described in detail below.

In order to simultaneously descend left and right, supply power to the DC motor for a certain period of time. If the power supply is stopped at the same time, the DC motor will also rotate a small amount under the action of inertia after the power supply stops, and a pulse signal 33 generated by inertia will appear. Since there are individual differences in the movable parts and DC motors of different rearview mirrors, the number and left and right of the pulse signals 31 and 33 generated by the power supply rotation and inertial rotation are different. As a result, even if the left and right sides start to rise at the same time next time, because the DC motor is rotated upwardly only according to the sum of the pulse signals 31, 33 of the respective downward power supply rotation and inertial rotation of the left and right sides, the time 35 when the power supply stops , 37 will be different from left to right, and the moment 36, 38 when the inertial rotation stops is also different from left to right. As shown in Fig. 22, although the DC motor on the left is stopped first, if the inertial rotation of the left DC motor also stops 36, the DC motor on the right performs inertial rotation 33, and the stopped left DC motor also stops. A pulse signal 34 is generated as if coasting. This pulse signal 34 comes from the inertial rotation of the DC motor on the right side. Although it is also called the noise of the so-called spurious pulse signal 34, its signal shape is the same as the pulse signal 33 generated by the inertial rotation. The spurious pulse signal 34 has already been generated when the pulse signal 33 of the pulsation signal 33 is terminated, so the pulse signal 33 generated by such a freewheeling rotation and the pulse signal 34 of noise cannot be easily distinguished so far.

Therefore, because the operation of returning the mirror to the original position is performed by counting to noise as a so-called spurious pulse signal, the mirror body cannot return to the original position. If this operation is repeated several times, the angle of the rear-view mirror will eventually change. There is also a large misalignment from the original angle. Although it is considered that a part of the electric wires of the left and right DC motors is used for the noise generation, the left and right electric wires cannot be independent in the existing system.

Contents of the invention

The object of the present invention is to provide the following control device and control method of the automobile rearview mirror: When the DC motor on one side stops and the DC motor on the other side rotates by inertia, the noise generated in the power circuit of the former DC motor is not counted Instead, only the pulse signal generated along with the rotation is counted, and the rearview mirror that is tilted downward is controlled to return to the original position correctly.

In order to achieve the stated purpose, in the present invention, a predetermined time difference is set at the upward tilting start moment of the left and right rearview mirrors, so that after the generation of the pulse signal produced by the inertial rotation of the DC motor on one side ends, noise will occur. The pulse signal, and can clearly identify the inertial rotation pulse signal and the noise pulse signal.

Specifically, the object is to connect the control device of the rearview mirror of the present invention to two DC motors respectively driving the movable parts of the left and right rearview mirrors of the automobile to adjust the tilt of the rearview mirror body up and down. Angle, and by adjusting the power supply to the DC motor, the action control of the movable part of the rearview mirror is performed.

And it has:

an external signal detection part that detects an action signal from the outside;

a power conditioning circuit that regulates the power supply to the DC motor;

two rotation angle detection means provided between the power adjustment circuit and the two DC motors to detect the rotation angle of the DC motors based on a state of change in the amount of power supplied accompanying the rotation of the DC motors; and

a control unit that controls power supply to the DC motor through the power adjustment circuit based on a signal from the rotation angle detection unit,

The control unit performs a series of controls as follows: tilting the movable part of the rearview mirror downward from the initial position, and then tilting it upward to return it to the original initial position;

When a downward tilt start signal is input from the external signal detection part, in order to make the movable parts of the two rearview mirrors tilt downward by a predetermined amount from the initial position, the two direct currents are supplied to the two through the power adjustment circuit. The motor supplies electric power, and when tilting downward, the sum of the rotation angle in the power supply detected by the two rotation angle detection parts and the rotation angle based on the inertial rotation after the power supply is stopped is taken as the sum of the two DC motors. Store them separately by tilting down the rotation angle;

When the tilt-up start signal is input after the tilt-down start signal from the external signal detection means is input, power is supplied to the DC motor on one side through the power adjustment circuit, and the control is performed according to the same Tilt the movable part of the rearview mirror on this side by an angle equal to the tilt-down rotation angle stored in the component, so that it roughly returns to the initial position. During the tilting process, the DC motor is tilted up to the set When the starting delay angle of 1/6 and above to 1/2 and below the downward tilting angle stored in the control part is used, the power is supplied to the DC motor on the other side through the power regulating circuit, and the Tilting up the movable portion of the rearview mirror at an angle equivalent to the downward tilting rotation angle stored in the control part of the DC motor on the other side, so as to return it to an approximately initial position;

When the two rearview mirrors are tilted upward, the sum of the upward rotation angles detected by the two rotation angle detection means in the power supply of the two DC motors and the upward rotation angle based on the inertia after the power supply is stopped , are stored as upward tilt angles respectively, and the noise detected by the angle detection part after the upward rotation stopped due to this inertia is excluded from the calculation of the upward tilt angle, and in this time The upward and downward inclination angles are used in the control of inclining the movable portion of the rearview mirror upward to substantially return it to the initial position in a series of controls.

With the above configuration, when the DC motor is rotated by receiving the power supply from the power regulating circuit, the power supply to the DC motor roughly changes periodically due to the change of the internal impedance accompanying this rotation operation, and according to this change state, The rotation angle of the DC motor is detected by the rotation angle detection part. The control unit first supplies electric power to the two DC motors so that the movable portion of the rearview mirror tilts downward by a predetermined amount, and then uses the detected signal of the sum of the detected downward rotation angle plus the inertial rotation angle as the respective directions. Count (store) by tilting down the corner. The initial position here is the position of the rearview mirror at which the driver can see the rear vehicle during normal driving (when driving forward), that is, the position set at the factory of the automobile. The predetermined amount of inclination downward from the initial position is the downward inclination of the movable portion of the rearview mirror by which the driver can confirm the angle of the contact portion of the rear wheel. And adjusting the inclination angle of the up and down direction of the rearview mirror body can be to incline the whole rearview mirror, or just to incline the rearview mirror body or the rearview mirror body and its accessories.

Secondly, if an upward inclination start signal is detected, the control unit at first only supplies power to the DC motor on one side, and only rotates upwards according to the downward tilt angle of the DC motor, so that the movable part of the rearview mirror on one side is approximately Return to the initial position. At this time, when the DC motor only rotates to the set starting delay angle, the control part supplies power to the DC motor on the other side, so that it only rotates upwards with the size of the downwardly inclined angle, and the other side rotates upwards. The movable parts of the side mirrors are also approximately returned to their initial positions. Here, the set starting delay angle is an angle set within a range of 1/6 or more and 1/2 or less of the down-tilt rotation angle of the former DC motor. By setting the start delay angle in this way, after the upward rotation motion of the former DC motor is terminated and the coasting rotation is also completely stopped, the rotation motion of the latter DC motor can be stopped and the coasting rotation can start. As a result, when the former DC motor is stopped and the latter DC motor is coasting, the noise detected by the former rotation angle detection means appears with a certain time interval from the former rotation angle signal by coasting. That is, since there is no signal at all between the rotation angle signal and the noise signal, the noise and the rotation angle signal generated by the inertial rotation can be distinguished, and the noise can be eliminated by the filter, so that it does not need to be included in the upward tilt rotation angle.

Although this upward tilting angle is used for the control of the movable part of a series of tilting rearview mirrors next time, the next control can be carried out at the angle of actual tilting. The initial position is staggered by the size of the part of the upward inertial rotation. Here, if the starting delay angle is less than 1/6 of the downward tilt angle, the problem of the angle signal and the noise generated by the inertial rotation cannot be separated in time through the state of the rearview mirror and the DC motor. And if the starting delay angle is greater than 1/2 of the downward tilting angle, the time difference of the upward tilting start of the movable part of the left and right rearview mirrors will be too large, and the driver will feel uncomfortable.

As a result, with the above configuration, the rotation angle of the DC motor is detected by the rotation angle detection means based on the change state of the power supply amount accompanying the rotation operation of the DC motor that tilts the movable part of the rearview mirror up and down, and the rotation angle is based on this. Angle, adjust the amount of power supply to the left and right DC motors, and because when tilting up, set a difference in the power supply start timing of the left and right, identify and discharge the noise detected by the rotation angle detection part, so after the downward and upward tilt , which can often roughly return to its original position.

The control device of the rearview mirror of the present invention can be constituted as follows, the external signal detection part is the gear selection state detection part of the automobile transmission, and when the reverse gear of the transmission is selected, it outputs a descending slope start signal, and the other On the one hand, when changing from the reverse gear to another gear, an upward inclination start signal is output.

In the above configuration, if the reverse gear of the transmission is selected for reverse, the selection is detected by the gear selection state detection part, and the power adjustment circuit is controlled by the control part to supply power from the power adjustment circuit to the DC motor. The rotational action of this DC motor tilts down the movable portion of the mirror. Then, when the rotation angle of the DC motor detected by the rotation angle detection means becomes a predetermined angle, the power supply to the DC motor is stopped by the control means. In this way, when the car is reversing, the rearview mirror can be automatically tilted downward according to the preset angle, so the driver can easily confirm the road conditions near the rear wheels, side grooves and curbs, etc.

And, when the automobile turns to move forward again, the change of the gear selection state from the reverse gear to other gears is detected by the gear selection state detection part, and according to this change, the power adjustment circuit is controlled by the control part, The movable part of the rearview mirror is tilted upward by the rotation of the DC motor. Thereafter, when the rotational angles of the DC motors detected by the rotational angle detecting means become equal to the respective downward tilting angles, the power supply to the DC motors is stopped by the control means. That is, when the rearview mirror is only tilted down by a predetermined angle corresponding to the reverse of the car, it can be tilted up only by a set angle, returned to the initial position, and automatically stopped. Because through such control, when the car is turned from reversing to driving forward, the inclination angle of the rearview mirror body of the rearview mirror can be roughly returned to the initial position as the normal angle automatically, so the driver does not need to adjust the rearview mirror every time. The angle of the viewing mirror is very convenient to use.

The control device of the rearview mirror of the present invention can have the following constitution: next time a series of control of the movable part of the rearview mirror will deduct the angle of inclination in this control from the downward inclination in the next control. The value obtained by the difference between upward and downward is used as a turning angle for supplying electric power to incline upward in the next control.

With the above structure, it can be easily controlled, and after the downward and upward tilting of the rearview mirror is completed, it always deviates from the initial position only by the amount of the upward inertial rotation.

However, the pulse signal generated by the rotation of the DC motor beyond the slope due to the inertia of the DC motor after it stops becomes smaller as the rotation slows down because there is no drive current for the DC motor. In other words, even if the DC motor rotates The magnitude of the pulse signal is also too small to count the pulse signal. That is, as shown in FIG. 23 , when the power supply from the motor driver (drive circuit) is stopped and the motor operation changes from normal rotation to coasting, pulse counting cannot be performed in the second half of the coasting. Therefore, if the tilting operation of the rearview mirror is performed many times, the position of the rearview mirror may be slightly misaligned each time, and the accumulated angle of the rearview mirror becomes greatly misaligned from the initial angle. If it becomes like this, the driver has to manually adjust the angle of the rearview mirror because the rear view cannot be confirmed through the rearview mirror, and the driver has to use extra manual actions.

The control device of the rearview mirror according to the present invention may have the following device, the control unit, at the end of the downward inclination or the end of the upward inclination, that is, at approximately the same time as the end of the power supply to the DC motor, only At a predetermined first time, the DC motor is supplied with electric power consisting of a current having an opposite sign to that of the electric power through the electric power regulating circuit.

According to the above structure, immediately after the power supply to the DC motor that tilts the movable part of the rearview mirror is completed, power consisting of a current with a reverse sign is supplied for braking, and the inertia of the DC motor can be reliably stopped. turn.

The control device of the rearview mirror according to the present invention may be configured such that the control unit only passes through a predetermined period of time after the end of the downward inclination or the end of the upward inclination, that is, after the power supply to the DC motor is stopped. At a predetermined first time starting from a time point after the second time, the DC motor is supplied with electric power consisting of a current whose sign is reversed to that of the electric power through the electric power adjustment circuit.

According to the above structure, when the power supply to the DC motor of the movable part of the tilting mirror is completed and the DC motor is coasting, the electric power consisting of the reverse sign current is supplied for braking, and the motor can be reliably stopped. inertial rotation.

In the technology of automatically controlling the inclination angle of the rearview mirror, the specific pulse signal generated by the rotation of the DC motor used to drive the movable part of the rearview mirror is detected, and the rearview mirror is controlled by counting the number of this specific pulse signal the angle of inclination. If the count of this specific pulse signal is incorrect, the angle of the mirror body is gradually misaligned from a predetermined angle during repeated descending slopes and rising slopes. Therefore, in this way, various techniques have been developed that do not cause angular misalignment.

For example, the following technology is disclosed in JP2001-138812A as an invention for controlling the angle of the rearview mirror tilted in conjunction with the reverse gear, that is, when the shift lever is engaged in the reverse gear, the DC motor is used to tilt the rear view mirror downward. The mirror counts the excess inclination caused by the inertia after the DC motor stops at this time as the number of pulse signals generated by the rotation of the DC motor. When switching from the reverse gear to other gears, the excess inclination caused by this inertia is included. Even if the angle of the rearview mirror is repeatedly tilted, the rearview mirror can still return to the same position.

And as shown in FIG. 24, although the DC motor generates a specific pulse signal a accompanying its rotation, a high-frequency component b is also generated after the specific pulse signal a. And, immediately after this high-frequency component b, a pseudo specific pulse signal c of a ringing phenomenon from this high-frequency component b is generated. If this false specific pulse signal c is detected by the pulse signal detection unit together with the specific pulse signal a, the so-called "pulse division" in which the specific pulse signal a that should have been detected as one is split into two and detected is generated. "Phenomenon. If this false specific pulse signal c is counted as the desired specific pulse signal a, the pulse signal cannot be detected correctly, so to solve the problem of pulse division, a low-pass filter is used to remove the high-frequency component b to prevent Occurrence of pseudo specific pulse signal c.

Furthermore, since the rotational speed of the DC motor is high during the steady rotation of the DC motor, as shown in FIG. 25, the pulse interval L tends to become smaller than the specific pulse width d. A phenomenon called "pulse combination" in which two adjacent pulse signals are counted as one pulse signal. If this is the case, since the number of pulse signals cannot be counted correctly, appropriate measures such as correcting the pulse width can be taken to solve the problem of pulse combination.

In this way, research and development are being carried out to improve the counting accuracy of a specific pulse signal generated by the rotation of a DC motor, related to technology related to automatic control of the angle of the rearview mirror.

In recent years, on the rearview mirror of an automobile, other electrical components such as a test signal indicator lamp and a foot lamp are installed in addition to the rearview mirror driving device. Therefore, as shown in FIG. 26 , the current supplied to the DC motor is also filtered in consideration of the fact that the specific pulse signal a generated from the DC motor for driving the rearview mirror will have a bad influence on other electrical components. In this case, the level of the low-frequency component e becomes relatively large compared with the signal level of the specific pulse signal a. Therefore, using the relationship with the amplitude of the low-frequency component e, the specific pulse signal a below a predetermined threshold cannot be detected, or the peak of the low-frequency component e is detected as the specific pulse signal. If this is done, the following problems will arise. The specific pulse signal generated by the rotation of the DC motor cannot be counted correctly, or the angle of the rearview mirror cannot be returned to the predetermined position correctly, and the so-called bottoming phenomenon occurs, and the rearview mirror cannot be performed. Angle control.

The rearview mirror control device of the present invention may be configured as follows, the rotation angle detection part detects a voltage change on a resistor located between the DC motor and the motor driver accompanying the rotation of the DC motor as a waveform signal, and From the detected waveform signal, extract the specific pulse signal generated by the rotation of the DC motor, and then output it;

At the same time, the control part has the following structure, counts the specific pulse signal output from the rotation angle detection part, and calculates the inclination angle of the rearview mirror body according to the count value, and controls the motor drive;

The rotation angle detecting means may have the following means: a band-pass filter for removing high-frequency components and low-frequency components as noise contained in the detected waveform signal; and a specific pulse signal to be output from the band-pass filter A waveform shaping circuit for shaping into a rectangular wave output.

With the above configuration, the control unit drives the DC motor through the motor driver when a signal instructing the start of tilting of the mirror is input. As the DC motor rotates, a periodic voltage change occurs across the resistor located between the DC motor and the motor driver. The rotation angle detection part detects this voltage change as a waveform signal. The detected waveform signal, in addition to the specific pulse signal, also contains high-frequency components and low-frequency components that are noise components. Band-pass filter, because its filter characteristics are set to only allow the preset specific pulse signal, so it removes the high-frequency and low-frequency components contained in the waveform signal, and only extracts the specific pulse generated by the rotation of the DC motor. pulse signal. Such a band-pass filter removes the high-frequency components, so that it is possible to prevent the generation of false specific pulse signals due to the ringing phenomenon of the high-frequency components. Furthermore, since the low-frequency components are removed by using the band-pass filter, it is possible to prevent counting omission of a specific pulse signal and wrong counting of the peak value of the low-frequency components.

A specific pulse signal extracted using a band-pass filter is input to a waveform shaping circuit. At this point in time, the specific pulse signal, which is an analog signal, is shaped by the waveform shaping circuit into a rectangular wave with a certain pulse width to become a digital pulse signal. The specific pulse signal thus shaped into a rectangular wave is input to the control section.

Here, too, a limiter can be arranged between the high-pass filter and the analog switch. The limiter cuts the portion above a predetermined value of a specific pulse signal input to an analog switch. As a result, it is possible to prevent pulse signals exceeding their input specifications from being input to each device included in the waveform shaping circuit and the control section.

In this way, the digital pulse signal output from the rotation angle detection means is a signal generated by removing noise components generated from each element, so it is only a signal derived from a specific pulse signal accompanying the rotation of the DC motor.

The digital pulse signal output from the rotation angle detection part is input to the control part and counted. The control unit corrects the preset number of pulse signals per revolution of the motor, the relationship between the number of motor revolutions and the inclination angle of the rearview mirror, the angle of the rearview mirror during normal operation, the angle of the rearview mirror during reversing, and the DC The inclination angle of the rearview mirror is calculated from the coefficient of the motor's inertial rotation, etc., and the number of pulse signals input from the rotation angle detection unit.

Here, the mirror angle during normal driving is an angle at which the driver can see the rear-view mirror of the vehicle behind during normal driving. And the rearview mirror angle when reversing is the rearview mirror angle set by the driver in order to be able to see the ground contact part of the rear wheel when reversing.

The control part controls the motor driver to correctly stop the mirror at the rearview mirror angle for reverse parking or the rearview mirror angle for normal driving according to the calculation result.

As a result, with the above configuration, the change state of the supply current accompanying the rotation operation of the DC motor of the movable part of the rearview mirror tilted up and down is detected by the rotation angle detection means as a waveform signal, and based on the The specific pulse signal generated by the rotation of the DC motor adjusts the amount of power supplied to the DC motor, thereby controlling the tilt angle of the rearview mirror body. Moreover, since the low-pass filter and high-pass filter are used to extract the specific pulse signal in the rotation angle detection part, both high-frequency components and low-frequency components can be removed, so that the rotation of the DC motor can be controlled very accurately. Therefore, even if the tilting operation of the mirror body in the upward and downward directions is repeated, since the mirror body will be accurately stopped at a predetermined position, so-called bottoming phenomenon and the like will not be inappropriate.

In this case, the control device of the rearview mirror of the present invention may be configured as follows, the band-pass filter includes a low-pass filter for removing high-frequency components in noise components, and a high-pass filter for removing low-frequency components in noise components. filter.

With the above-mentioned configuration, the configuration of the band-pass filter can be actualized by combining the high-pass filter and the low-pass filter. A low-pass filter removes high-frequency components contained in the signal detected by the rotation angle detection section. Since the high-frequency components are removed by the low-pass filter, it is possible to prevent the occurrence of spurious specific pulse signals due to the ringing phenomenon of the high-frequency components. On the other hand, a high-pass filter removes low-frequency components contained in a waveform signal. Because the low-frequency components are removed by the high-pass filter, it is possible to prevent counting omission of specific pulse signals and wrong counting of low-frequency component peaks, so that the tilt of the rearview mirror body can be accurately controlled. In this way, only the specific pulse signal generated by the rotation of the DC motor from which the noise component has been removed is extracted by the low-pass filter and the high-pass filter. And the specific pulse signal extracted by the band-pass filter formed by the low-pass filter and the high-pass filter is converted into a rectangular digital pulse signal by the waveform shaping circuit, and then output to the control circuit.

Moreover, the control device of the rearview mirror of the present invention may be in the following form, the band-pass filter is composed of a combination of a low-pass filter and a dual-system high-pass filter, and the low-pass filter removes the The high-frequency components of the two-system high-pass filter respectively remove the low-frequency components included in the pulse signal when the DC motor rotates forward and the low-frequency components included in the pulse signal when the motor reverses.

It also has an analog switch, and this switch outputs any one of the specific pulse signals output from the high-pass filter of the two systems to the waveform shaping circuit through the instruction of the control part.

If the direction of rotation of the DC motor is reversed when the rearview mirror is lowered and raised, and the output of the motor is different, the voltage level of the waveform signal detected in the rotation angle detection part is also different. Therefore, when the voltage level difference between the forward rotation and the reverse rotation of the DC motor is large, it may not be possible to extract a desired specific pulse signal using one high-pass filter. However, in the above configuration, the band-pass filter includes a dual-system high-pass filter that removes low-frequency components during forward rotation and low-frequency components during reverse rotation of the DC motor, respectively. The filtering characteristics of these two high-pass filters are set in advance so as to be suitable for forward rotation and reverse rotation of the DC motor, respectively. As a result, even when the difference in voltage level of the waveform signal at the time of forward rotation and reverse rotation of the DC motor is large, the high-pass filter of the two systems removes the low frequency components corresponding to the respective power supply amounts. That is, pulse signals from which high-frequency components have been removed by the low-pass filter are respectively input to the two-system high-pass filter. The waveform signal input to each high-pass filter passes through at least one of the high-pass filters to remove low-frequency components. Input the waveform signals after passing through two high-pass filters into the analog switch together. The control unit detects whether the DC motor is running forward or backward, and if it is forward, it controls the analog switch, and only inputs to the waveform shaping circuit the filter from the waveform signal input from each high-pass filter when it is set to forward rotation. A specific pulse signal input by a characteristic high-pass filter. On the other hand, if the DC motor reverses, the control unit controls the analog switch, and only the specific pulse signal input from the high-pass filter set to the filter characteristic at the time of reverse rotation is input to the waveform shaping circuit. The specific pulse signal input to the waveform shaping circuit is converted into a rectangular digital pulse signal and output to the control circuit.

As a result, with the above configuration, the filter characteristics of each high-pass filter are set in advance so as to be suitable for forward rotation and reverse rotation of the DC motor. Therefore, even if the voltage level of the motor driver circuit is different between forward rotation and reverse rotation of the DC motor, the low-frequency components can be reliably removed by any high-pass filter.

Furthermore, in the control device for a rearview mirror of the present invention, the bandpass filter may be constituted by an active filter with an amplifier.

In the above configuration, the active filter is a filter having an active element such as an operational amplifier as an amplifier. By using an active filter as a bandpass filter, the allowable frequency domain can be more clearly defined. Therefore, high-frequency components and low-frequency components included in the waveform signal can be reliably removed, and a desired specific pulse signal can be extracted with high precision.

As a DC motor power supply, a car battery is usually used. However, if the power supply voltage drops or becomes 0 due to failure of the battery or generator or disconnection of the power wiring, the DC motor stops, and even if it rotates, it cannot work normally because the torque is too low, or it stops in the middle. In addition, there are cases where the amplitude of the pulse signal decreases due to a low power supply voltage, so that counting cannot be performed. There are also cases where the tilt control cannot be performed normally under the above conditions, so the rearview mirror stops at the normal position or during the process of tilting downward, or the rearview mirror refuses to work on the upper or lower side, so the normal operation cannot be performed. After confirming the rear, it loses its role as a rearview mirror.

The rearview mirror control device of the present invention may also have: a power supply and a monitoring circuit for power supply to the DC motor, wherein the monitoring circuit monitors the power supply voltage of the power supply, and only passes the power supply voltage when the power supply voltage is greater than a predetermined voltage The power regulating circuit issues a power supply command to the control unit to supply power to the DC motor.

According to the above configuration, even if the voltage of the power supply is lower than a predetermined voltage, the monitoring circuit detects that the power is not supplied to the DC motor, thereby preventing the movable part of the rearview mirror from stopping at an abnormal position.

In the current remote-controlled rearview mirror control device, each of the left and right rearview mirrors uses a driving motor. And, in the case of tilting the rearview mirror body up and down, for example, its general way is that the forward rotation motor tilts the rearview mirror body downward, and the reverse rotation motor tilts the rearview mirror body upward. In such a mirror angle control device, the flow of current supplied to the DC motor is reversed at the time of forward rotation and reverse rotation of the DC motor. Therefore, a so-called phenomenon of inversion of the polarity of the specific pulse signal generated by the rotation of the DC motor occurs. Therefore, since such specific pulse signals with different polarities are extracted by different filters and amplified by amplifiers, for example, non-inverting amplifiers for amplifying pulse signals during forward rotation and non-inverting amplifiers for For an inversion amplifying amplifier that amplifies the pulse signal at the time of inversion, the pulse detection circuit must be a dual system. On the other hand, in recent years, in addition to the rearview mirror driving device, multiple electronic components such as side signal indicators and footlights have been installed on automobiles, as well as multiple electronic instruments such as car navigation systems. Therefore, in the remote control rearview mirror control The device seeks to simplify the circuit and reduce the number of parts while improving the reliability of the operation.

The rearview mirror control device of the present invention may be configured in the following form: wherein, the rotation angle detecting part is configured as follows, and it detects a resistor between the DC motor and the motor driver that is generated by the rotation of the DC motor. The voltage change on the circuit board is detected as a waveform signal, and a predetermined pulse signal output is extracted from the detected waveform signal;

The control part is constituted as follows, it counts the pulse signal output from the rotation angle detection part, and calculates the inclination angle of the rearview mirror body according to the count value, and controls the motor driver according to the calculation result;

The rotation angle detection part has: a filter for extracting a predetermined pulse signal from the waveform signal; an amplifier for amplifying the pulse signal extracted by the filter; and a waveform shaping circuit for shaping the pulse signal amplified by the amplifier into a rectangular wave;

The amplifier is configured as follows. When the DC motor is rotating forward, it non-invertingly amplifies the specific pulse signal generated by the rotation of the DC motor, and when the DC motor is rotating in reverse, it does not invert and amplify the pulse signal generated by the DC motor. A high-frequency component generated after a specific pulse signal generated by the rotation of a DC motor.

With the above configuration, the rearview mirror control device detects the specific pulse signal and high-frequency components. The specific pulse signal is generated by the rotation of the DC motor that drives the rearview mirror body, and the high-frequency component is generated after the specific pulse signal. , and control the rearview mirror body through such detection. The control part changes the rotation direction of the DC motor by changing the polarity of the voltage applied to the DC motor through the motor driver. If the direction of rotation of the DC motor is changed, the polarity of specific pulse signals and high-frequency components included in the waveform signal is also reversed. Therefore, at the time of forward rotation, a specific pulse signal generated by the rotation of the DC motor is amplified, and at the time of reverse rotation, a high-frequency component generated after the specific pulse signal generated by the rotation of the DC motor is amplified. The filter is set to extract a specific pulse signal generated during forward rotation of the DC motor, and is set to extract as a pulse signal a high-frequency component generated with the same polarity as the specific pulse signal when the DC motor reverses. The specific pulse signal extracted by the filter during forward rotation of the DC motor and the pulse signal derived from the high-frequency component during reverse rotation have the same polarity. These signals having the same polarity are amplified non-invertingly by an amplifier. The amplified signal is shaped into a rectangular wave by the waveform shaping circuit, and it is input into the MPU as a digital pulse signal. In this way, a desired pulse signal having the same polarity is obtained by non-invertingly amplifying the signal at the time of forward rotation and the signal at the time of inversion extracted through the filter with one amplifier. Therefore, a desired signal can be detected using one rotation angle detection part.

Therefore, according to the above configuration, in the rotation angle detection part, the pulse signal generated by the rotation of the DC motor is extracted, and during the amplification process, the rotation angle detection part of one system can detect the signal when the DC motor rotates forward and reverse, so that The number of components used can be reduced by simplifying the two-system rotation angle detection components for forward rotation and reverse rotation that are currently required. Moreover, the inclination angle of the rearview mirror body can be correctly controlled.

In this case, the rearview mirror control device of the present invention may have the following structure. The amplifier is configured as follows. When the DC motor rotates forward, it inverts and amplifies the specific pulse signal generated by the rotation of the DC motor. The high-frequency components generated later, and when the DC motor reverses, the reverse amplifies the specific pulse signal generated by the rotation of the DC motor.

According to the above configuration, during forward rotation, a high-frequency component generated after a specific pulse signal generated by rotation of the DC motor is amplified, and during reverse rotation, a specific pulse signal generated by rotation of the DC motor is amplified. The filter is set to be able to extract a high-frequency component generated during forward rotation of the DC motor as a pulse signal, and is set to be able to extract a specific pulse signal generated during reverse rotation of the DC motor. The specific pulse signal during forward rotation of the DC motor extracted by the filter and the pulse signal derived from the high-frequency component during reverse rotation have the same polarity. These signals having the same polarity are inverted and amplified using one amplifier. And the amplified signal is shaped into a rectangular wave by a waveform shaping circuit, and output to the MPU as a digital pulse signal. As a result, a desired pulse signal of the same polarity can be obtained by inverting and amplifying the forward rotation signal and the reverse rotation signal extracted by the filter using a single amplifier, and the desired signal can be detected by one rotation angle detection means.

In JP2001-138812A, the following technology is disclosed, which is linked with the reverse gear to control the angle of the tilted rearview mirror. When the shift lever is shifted into the reverse gear, the DC motor is used to tilt the rearview mirror downward, and At this time, the excess inclination caused by the inertia after the DC motor stops is counted as the number of electrical pulse signals generated by the rotation of the DC motor. When shifting from the reverse gear to other gears, the inertia based on this The angle of the rearview mirror is restored by exceeding the tilt component, and the rearview mirror can be restored to the same position even if the operation of tilting the angle of the rearview mirror is repeated. This pulse signal is a high-frequency signal that is generated when the brushes are switched when the motor rotates and is detected by switching the pickup coil.

However, in the technique described above, a single DC motor is used for tilting operations in both up and down directions, and since switching up and down is performed by reversing the polarity of the current supplied to the DC motor, there is no difference between tilting up and down. , as shown in FIGS. 27A and 27B, the phases of the pulse signals generated by the rotation of the motor are reversed. Therefore, circuits for detecting and counting pulse signals need to be increased to 2 series, thereby increasing the number of parts and cost. As shown in FIG. 28 , it is also the case where a resistor is connected to a wire for supplying power to a DC motor, and a pulse signal is detected therefrom as a current signal.

The control device of the rearview mirror of the present invention also has 2 wires connecting the DC motor and the power adjustment circuit, which is constituted as follows:

The rotation angle detection unit is connected to the two electric wires, and detects the rotation angle of the DC motor based on an electrical signal of a change state of the power supply amount accompanying the rotation of the DC motor;

The electric power adjusting circuit is constituted as follows, and in the case of adjusting the upward inclination angle and the downward inclination angle of the rearview mirror body, the currents of the supplied electric power are respectively supplied to the DC motor by the sign Opposite currents constitute electricity;

In addition, the rotation angle detecting means is configured to obtain a signal from one of the two electric wires when adjusting the upward tilt angle of the rearview mirror body, and when adjusting the downward tilt angle, Get the signal from the other 1 of those 2 wires.

According to the above configuration, when tilting up and down, because it is a simple configuration that obtains electrical signals from different wires among the two wires connected to the DC motor, it can be obtained under any circumstances. For signals of the same phase, the circuit for counting the signals can be solved in one series, thereby reducing the cost.

The motor rotation angle detection circuit disclosed in JP2001-138812A has the following structure, as shown in Fig. 29, through DC cutoff, amplification and clipping, the signal generated every time the DC motor rotates at a predetermined rotation angle (for example, 60°) is extracted. After the analog switch selects forward/reverse, the waveform shaping circuit is used to transform it into a pulse signal with a certain pulse width, and the signal is input to the microcomputer, and the rotation angle of the motor is detected by converting the number of pulse signals. Such detection of the number of rotations of the motor is based on the premise of a one-to-one correspondence between the rotation angle of the motor and the number of pulse signals.

However, when the motor speed is low during the motor start-up period and the transition period, as shown in FIG. 30A, since the period of the signal from the DC motor is about 3 to 8 msec, the waveform disturbance such as ringing that occurs between the signals is used The signal recognized by the waveform shaping circuit, due to waveform interference such as waveform shaping ringing, counts more pulse signals than the correct number of pulse signals, and a so-called pulse segmentation error may occur.

On the other hand, when the motor rotation speed is high in the stable period of the motor, as shown in Fig. 30B, since the period of the signal from the DC motor is relatively short, about 1 to 2 msec, a plurality of (for example, 2 1) signal is recognized as 1 signal, and the number of counted pulse signals is less than the correct number of pulse signals due to the reduction of waveform shaping signals, and a so-called pulse combination error may occur. Thus, since the number of count pulse signals is incorrect and the detected motor rotation angle is also incorrect, high-precision control of the tilt angle of the rearview mirror cannot be performed.

The rearview mirror control device according to the present invention may be configured as follows, the rotation angle detecting means having a signal generating part that generates a predetermined signal every time the DC motor rotates by a predetermined angle, and a signal from the signal generating part is input. and a signal output unit that transforms the signal into a pulse signal with a predetermined pulse width and outputs it;

The signal output unit is configured such that the pulse width of the pulse signal is shortened when the rotation speed of the motor is relatively low compared to when the rotation speed of the motor is relatively low.

According to the above configuration, the structure can shorten the pulse width of the pulse signal when the motor speed is relatively low compared to when the motor speed is relatively low. Therefore, when the motor rotation speed is low during the motor start-up period and during the transition period, it is difficult for the waveform shaping circuit to recognize waveform disturbances such as ringing generated between signals as signals, thereby suppressing the occurrence of so-called pulse splitting. On the other hand, when the motor speed is high during the steady-speed period of the motor, it is difficult for the waveform shaping circuit to recognize multiple signals as one signal, thereby suppressing the occurrence of so-called pulse combination.

In this case, the control device of the rearview mirror according to the present invention may be configured such that the signal output unit is configured to change the pulse width of the pulse signal in two stages with a specific motor rotational speed as a boundary.

Although it is also possible to change the pulse width of the pulse signal continuously, it is also possible to change the pulse width of the pulse signal in stages in a simple manner, that is, as described above, with a specific motor speed as the boundary and in two stages of change. The pulse width of the pulse signal is the simplest.

Furthermore, in the mirror control device according to the present invention, the pulse width of the pulse signal when the rotation speed of the motor is faster than a specific motor rotation speed may be set so as to limit the pulse combination of the pulse signal. Here, the pulse width that limits the pulse combination of the pulse signal is determined by the structure of the device, that is, it is a width that cannot cause pulse combination when the motor speed is faster than a specific motor speed.

Furthermore, the mirror control device of the present invention may be configured such that the pulse width of the pulse signal when the motor rotation speed is slower than a specific motor rotation speed is set to a pulse width that limits the pulse division of the pulse signal. Here, the pulse width that limits the pulse division of the pulse signal is determined by the device structure, that is, the pulse width that cannot cause pulse division when the motor speed is slower than a specific motor speed.

The rearview mirror control method of the present invention is aimed at, in order to adjust the inclination angle of the rearview mirror body, drive the movable parts of the left and right rearview mirrors of the automobile with two DC motors respectively, and adjust the power supply of the DC motors , to perform motion control of the movable part of the rearview mirror.

Also, it has the following steps:

Step 1, by supplying power to the DC motors respectively, tilting the movable parts of the rearview mirrors on both sides at a predetermined angle in one direction, and storing the rotation angle and the power supply of the respective DC motors in the power supply The rotation angle caused by inertia after stopping;

Step 2: After the DC motors are rotated by supplying electric power to each of the DC motors, the movable parts of the two rearview mirrors are stopped at the rotation angles and power supply in the respective power supplies to the one direction. When the sum of the rotation angles due to inertia tilts in the reverse direction, the start of power supply to one DC motor is delayed by a predetermined delay time than the start of power supply to the DC motor on the other side. Tilt, and store the rotation angle during the power supply of each DC motor and the rotation angle due to inertia after the power supply stops;

The predetermined delay time is set by adding the delay time to the power supply time to the DC motor on the one side when the movable parts of the rearview mirrors on the two sides are tilted in reverse. , which is longer than the sum obtained by adding the power supply time to the DC motor on the other side to the time during which the DC motor on the other side rotates due to inertia when the power supply stops.

As in the method described above, since the start of power supply to the DC motor on one side is delayed by a predetermined delay time from the start of power supply to the DC motor on the other side, it is possible to correctly distinguish between noise and True corner signal for correct control. That is, because the time obtained by adding the delay time to the power supply time to one DC motor is longer than the sum of the power supply time to the other DC motor plus the inertial rotation time, Therefore, noise signals and corner signals can be distinguished exactly. In addition, if the predetermined delay time is 1/6 of the time it takes for the DC motor on the other side to turn the sum of the rotation angle during the power supply in one direction and the rotation angle due to inertia after the power supply stops If it is more than 1/2 and less than 1/2 of the time, it can ideally and accurately distinguish the noise and the corner signal.

The control method of the rearview mirror of the present invention may be in such a manner that by supplying electric power to the DC motor to drive the DC motor, after only driving the movable part of the rearview mirror up or down by a predetermined amount, Only at a predetermined first timing, the DC motor is supplied with electric power consisting of a current having an inverse sign to that of the supplied electric power.

According to the method described above, after the movable part of the rearview mirror is tilted at a certain angle by the DC motor, braking is performed only by supplying electric power consisting of a reverse current to the DC motor at the first time, so the inertia can be accurately stopped. Rotate to return the rearview mirror to the original position.

In this case, the rearview mirror control method of the present invention may be a method of performing the reverse sign from a time point when a predetermined second time elapses after the power supply to the DC motor is stopped. The electric current constitutes the supply of electricity.

According to the above method, after the movable part of the rearview mirror is tilted at a certain angle by the DC motor, braking is performed by supplying electric power consisting of a reverse current to the DC motor at the first time only after the second time elapses. , so applying the brake during the inertial rotation of the DC motor can stop the inertial rotation accurately and easily, so that the rearview mirror can be restored to its original position.

Control method of the present invention has the following steps again:

a waveform signal detection step, which detects, as a waveform signal, a voltage change on a resistance between the DC motor and the DC motor driver generated by the rotation of the DC motor;

a specific pulse signal extraction step of extracting a specific pulse signal generated by rotation of the DC motor included in the waveform signal detected by the waveform signal detection step;

an inclination angle calculation step, which counts the specific pulse signal extracted in the above-mentioned specific pulse signal extraction step, and calculates the inclination angle of the rearview mirror body according to the count value;

a power supply control step of controlling power supply from the motor driver to the DC motor to stop the mirror body at a predetermined angle based on the calculation result obtained in the tilt angle calculation step;

In the specific pulse signal extraction step, the high-frequency components of the waveform signal detected in the waveform signal detection step may be removed by a low-pass filter, and low-frequency components may be removed by a high-pass filter, thereby extracting a specific pulse signal.

If it is the above method, the specific pulse signal generated by the rotation action of the DC motor that adjusts the inclination angle of the rearview mirror body can be extracted through a low-pass filter and a high-pass filter. Since the noise component has been removed from the specific pulse signal thus extracted, it is possible to accurately control the rotation of the DC motor.

The rearview mirror control method of the present invention may be a method of monitoring the power supply voltage of a power supply supplying power to the DC motor, and when driving the movable part of the rearview mirror from a stop state, the power supply voltage is a predetermined When the voltage is below, the movable part of the rearview mirror is kept in a stopped state.

According to the above method, the voltage of the battery is monitored, and the DC motor is not driven when the battery voltage is below a predetermined voltage, so that the movable part of the rearview mirror can be prevented from being driven to a predetermined amount before stopping. Furthermore, when detecting the rotation angle of the DC motor and performing operation control, the DC motor is supplied with power only when the voltage of the storage battery is higher than the voltage capable of detecting the rotation angle of the DC motor, so abnormal control can be prevented. action. That is to say, when the power supply voltage drops below the predetermined voltage due to failure of the storage battery or the generator, etc., and becomes a voltage that cannot normally drive the movable part of the electrical component of the automobile, the movable part is kept in a stopped state, so it can prevent The following situations occur: the movable part cannot be driven by a predetermined amount and stops midway, or stops during normal operation control, and the movable part is driven to an abnormal position repeatedly occurs.

The control method of the rearview mirror of described automobile can have the following steps:

a waveform signal detection step of detecting, as a waveform signal, a voltage change on a resistor located between the DC motor and the motor driver generated by the rotation action of the DC motor;

a pulse signal extracting step of extracting, through a filter, a predetermined pulse signal included in the waveform signal detected in the waveform signal detecting step;

A signal amplification step, which non-inversion amplifies or inversion amplifies the pulse signal extracted in the pulse signal extraction step;

A waveform shaping step, which performs waveform control on the pulse signal amplified in the signal amplification step to form a rectangular wave;

an inclination angle calculating step of counting the rectangular waves shaped in the waveform shaping step, and calculating the inclination angle of the rearview mirror body based on the count value; and

A power supply control step of controlling power supply from a motor driver to the DC motor based on the calculation result obtained in the inclination angle calculation step to stop the mirror body at a predetermined angle.

If it is the above method, according to the characteristics of the DC motor and the position of the detection waveform signal, through the amplifying part used in the step of amplifying the pulse signal in advance, select either the non-inverting amplifying type or the inverting amplifying type, and the present for The necessary two-system circuit for amplifying pulse signals detected during forward rotation and reverse rotation of the DC motor can be completed with only one system.

The control method of the present invention may be the following method,

Controlling the movement of the movable part of the rearview mirror by using the electrical detection signal of the rotation angle of the DC motor and adjusting the power supplied to the DC motor through the power supply wire;

In order to make the phases of the detection signal when adjusting the upward tilt angle of the rearview mirror body and the detection signal when adjusting the downward tilt angle be the same, the respective detection signals can be obtained from the mutually different power supply wires. Signal.

In the above method, since the electrical detection signals in the up-slope and the down-slope are obtained from different situations, they can be used as signals of the same phase, so that the circuit for counting these signals can be used in 1 series, and the cost can be reduced. .

The control method of rearview mirror of the present invention can have the following steps:

a signal generating step of generating a predetermined signal every time the DC motor rotates through a predetermined angle; and

a signal shaping and changing step, which transforms the signal generated in the signal generating step into a pulse signal with a predetermined pulse width;

Wherein, in the signal shaping transformation step, the pulse width of the pulse signal is shortened when the motor speed is high compared to when the motor speed is relatively low.

Description of drawings

FIG. 1 is a block diagram showing the configuration of a rearview mirror control device according to Embodiment 1;

FIG. 2 is a side view showing an example of a rearview mirror according to Embodiment 1;

3 is an explanatory diagram showing a structural example of a DC motor;

4A to 4E are explanatory diagrams showing how the contact state of the commutator and the brush changes with the rotation of the DC motor;

5A is an explanatory diagram showing the correspondence between the rotation angle of the DC motor and the change state of the motor current, and FIGS. 5B to 5D are explanatory diagrams showing the output of the motor current after signal processing in stages;

6 is a timing chart of power supply to left and right DC motors and generated pulse signals in Embodiment 1;

7 is a block diagram showing the configuration of a rearview mirror control device according to Embodiment 2;

8 is a timing chart of the operation of the driver circuit and the DC motor in Embodiment 2;

9 is a timing chart of the operation of the driver circuit and the DC motor in Embodiment 3;

10 is a block diagram showing the configuration of a control device for a rearview mirror according to Embodiment 4;

11 is a block diagram showing the configuration of a control device for a rearview mirror according to Embodiment 5;

12 is a block diagram showing the configuration of a rearview mirror control device according to Embodiment 6;

13A and 13B are conceptual diagrams showing specific pulse signals and high-frequency components included in the waveform signal detected in Embodiment 1;

14 is a block diagram showing the configuration of a control device for a rearview mirror in another embodiment;

15A to 15D are conceptual diagrams showing specific pulse signals and high-frequency components included in the waveform signal detected in Embodiment 2;

16A and 16B are conceptual diagrams showing specific pulse signals and high-frequency components included in the waveform signal detected in Embodiment 3;

17A to 17D are conceptual diagrams showing specific pulse signals and high-frequency components contained in waveform signals detected in Embodiment 4;

18 is a block diagram showing the configuration of a control device for a rearview mirror according to Embodiment 7;

19 is a block diagram showing the configuration of a control device for a rearview mirror according to Embodiment 8;

Fig. 20 is an explanatory diagram showing the corresponding relationship between the motor current and the pulse signal during the start-up period and even the transition period of the DC motor;

FIG. 21 is an explanatory diagram showing a correspondence relationship between a motor current and a pulse signal during a stable period of a DC motor;

FIG. 22 is a timing chart of power supply to the left and right DC motors and generated pulse signals in conventional control;

Fig. 23 is a timing diagram of the actions of the conventional drive circuit and the DC motor;

Fig. 24 is a conceptual diagram showing a specific pulse signal and high-frequency components contained in a waveform signal;

Fig. 25 is a conceptual diagram showing a pulse width and a pulse interval;

Fig. 26 is a conceptual diagram showing a specific pulse signal and low-frequency components contained in a waveform signal;

FIG. 27A is a graph showing a motor rotation detection signal when the motor is rotating forward, and FIG. 27B is a graph showing a motor rotation detection signal when it is rotating reversely;

28 is a block diagram showing the configuration of a control device for a rearview mirror in a comparative form;

FIG. 29 is an explanatory diagram showing a correspondence relationship between a motor current and a pulse signal;

Fig. 30A is an explanatory diagram showing the correspondence between the motor current and the pulse signal during the start-up period and the transition period of the conventional DC motor, and Fig. 30B is a diagram showing the correspondence between the motor current and the pulse signal during the stable period of the conventional DC motor An illustration of the relationship.

Detailed ways

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)

Fig. 1 and Fig. 2 show the control device of the electric remote-controlled rearview mirror of the automobile of embodiment 1 of the present invention, and the symbol 1 in Fig. . The rearview mirror 1 has a shell-shaped shell 2, and the actuator assembly 3 is accommodated in the shell 2. On the vehicle rear of the shell 2, a rearview mirror body 4 made of a flat mirror is disposed substantially throughout the entire surface. The main body 4 is installed on the executive component assembly 3 through the base plate 25 . And the angle of the up-and-down direction of the rearview mirror body 4 is adjusted by the action of the DC motor 5R (DC motor: only shown in FIG. 1 ) that is loaded into the actuator assembly 3 respectively, through the reduction gear device that is not in the figure. . That is, the mirror body 4 and the base 25 correspond to the movable part of the mirror 1 . In addition, a DC motor (not shown) for adjusting the horizontal angle of the rearview mirror body 4 is similarly mounted on the actuator assembly 3 .

The DC motor 5R is connected to a controller 6 (control device) through a harness. This controller 6 is connected with the accumulator 7 as the power source, and is at least input from the remote control switch 8 manually operated by the driver and the gear selection position switch 9 (gear selection state) linked with the operation of the gear change lever not shown in the figure. Detecting components) output signals, and adjust the power supply to the DC motor 5R and the inclination angle of the mirror body 4 of the remote-controlled rearview mirror 1 according to the signals input to the controller 6 from the switches 8 and 9 . That is, the switches 8, 9 correspond to external signal detection means.

In detail, an MPU12 is set on the driver 6, which receives the output signal from the remote control switch 8 or the gear selection position switch 9, and outputs a control signal corresponding to this signal to the driver circuit 11, and receives the output of the MPU12. The signal driver circuit 11 applies a DC voltage to the terminals of the right and left DC motors 5R and 5L respectively, and the DC motors 5R and 5L perform rotation. Utilize this kind of structure, through the operation switch 8 of the remote control by the driver of the car, when moving forward normally, the inclination angle of the up and down direction of the rearview mirror body 4 can be easily adjusted, and the approximate angle can be obtained while sitting on the driver's seat. Appropriate rearward visibility in the horizontal direction. Furthermore, automatic adjustment of the inclination angle of the mirror body 4 in the up-down direction can also be performed by changing gears mentioned later. Here, the driver circuit 11 corresponds to a power adjustment circuit that regulates the power supply of the DC motors 5R and 5L, and also corresponds to a control unit of the MPU 12 that controls the driver circuit 11 . In addition, memory, I/O interface, etc. in the controller 6 are omitted in the drawing.

Furthermore, the controller 6 has motor rotation angle detection circuits 13R, 13L (rotation angle detection means) for detecting the rotation angles of the DC motors 5R, 5L based on the state of change of the current iR, iL supplied from the drive circuit 11 to the DC motors 5R, 5L. ). The motor rotation angle detection circuits 13R, 13L focus on the variation of the current iR, iL supplied to each of the DC motors 5R, 5L due to the change of the internal impedance due to the rotation operation of each DC motor 5R, 5L, and detect the DC motor 5R, iL from the fluctuation state of the current iR, iL. 5L; specifically, it has: resistors 14R, 14L for detecting DC currents iR, iL flowing from the driver circuit 11 to the DC motors 5R, 5L; by removing the current waveform flowing through the resistors 14R, 14L filter circuits 15R, 15L composed of low-pass filters for high-frequency components; amplifier circuits 16R, 16L composed of operational amplifiers that amplify the outputs from the filter circuits 15R, 15L; Waveform shaping circuits 17R, 17L that shape the output waveform into a rectangular wave.

Although in the foregoing description, the DC motors 5R, 5L; the motor rotation angle detection circuits 13R, 13L; the resistors 14R, 14L; the filter circuits 15R, 15L; the amplifier circuits 16R, 16L; For iR and iL, R is added for components corresponding to the right rearview mirror 1, and L is additionally used for components corresponding to the left rearview mirror.

If the controller 6 is described in more detail, the DC motor 5 used in the remote-controlled rearview mirror of Embodiment 1 is a three-phase motor as shown in FIG. Above, a rotor 53 with three electromagnets 52, 52, 52 is installed through an insulating portion, and a stator 54 made of permanent magnets is arranged outside it. A commutator 55 for supplying power to the coils of the electromagnets 52 is provided integrally with the rotor 53 coaxially with the rotor 53 , and brushes 56 , 56 are arranged in contact with the outside of the commutator 55 .

And if the shaft 51, the rotor 53, and the commutator 55 rotate integrally, the electromagnets 52 are reversed one by one by changing the flow direction of the current supplied from the brushes 56, 56 to the electromagnets 52 via the commutator 55. The magnetic poles of the rotor 53 are not constrained by its rotational position and the magnetic field repulsion of the stator 54 and rotate in one direction (counterclockwise in the figure). On the other hand, when the direction of the current i supplied to the brushes 56, 56 is reversed, the rotor 53 rotates in the direction opposite to the direction.

And, by such a rotation operation of the DC motor 5, as shown schematically in FIGS. The contact position changes accordingly, and as shown in FIG. 5A , the motor current i, that is, the supply current i supplied from the controller 6 to the DC motor 5 , fluctuates at a substantially constant cycle in accordance with the rotation angle of the motor 5 . Fig. 5 A shows the change state of the electric current i detected according to the voltage drop at both ends of the resistor 14 in the controller 6, if the waveform of this electric current i is passed through the filter circuit 15, the waveform shown in Fig. 5B is obtained Signal i'.

Then, as shown in Figure 5C, the signal is amplified by the amplifying circuit 16, and the amplified signal i "is shaped into a rectangular wave by the waveform shaping circuit 17, and then this signal is input as the pulse signal p in the MPU12. And, by the MPU12 The counter counts the input pulse signal, and according to the count value, detects the rotation angle of the DC motor 5, and then the inclination angle of the rearview mirror body 4. In the first embodiment, as shown in Figures 5A to 5D, because the DC motor 5 Every time the angle of rotation changes by 60°, the pulse signal p is input once. Therefore, if the speed reduction ratio (transmission ratio) of the reduction gear device that drives the rearview mirror body 4 and the DC motor 5 is set to, for example, the so-called DC motor 5 rotates If the corresponding relationship of rearview mirror angle changes by 10° during 20 revolutions, when the pulse signal p counts 120 times, the inclination angle of rearview mirror body 4 changes by 10°. In addition, even as shown in Fig. 5A, even if The noise component is contained in the motor current i, and since there is no error in the waveform-shaped pulse signal p as shown in FIG. 5D, the rotation angle of the DC motor 5 can be accurately detected.

As a result, as will be described later, the inclination angle of the mirror body 4 can be adjusted by controlling the power supply to the DC motor 5 using the controller 6 based on the count value of the pulse signal p. However, since the DC motor 5 is rotated by inertia even after the power supply is stopped, the inclination angle of this inertia rotation cannot be adjusted. Furthermore, even after the DC motor 5 stops, the noise of the so-called spurious pulse signal having exactly the same shape as when the motor 5 is rotating is counted. The following describes a series of controls in which the movable part of the rearview mirror 1 according to the first embodiment is tilted downward from the initial position, then tilted upward to return it to approximately the original initial position, and the removal of the noise in this control will be described. happened.

FIG. 6 is a timing chart of the supply of electric power to the left and right DC motors 5L, 5R and pulse signals generated. If MPU12 receives the selection state detection signal from the reverse gear of gear selection position switch 9, MPU12 outputs to driver circuit 11 in order to make the inclination angle of right and left rearview mirror body 4 become downward simultaneously to DC motor 5R, 5L. A power signal is supplied for a certain period of time, for example, 2 seconds, and the driver circuit 11 supplies power as it is. Since the DC motors 5R, 5L rotate slightly due to inertia even if the power supply is stopped at the same time on the left and right sides, the pulse signal 33 generated by the inertial rotation is detected by the rotation angle detection circuits 13R, 13L. Since the ease of rotation and torque are uneven at the movable part of each rearview mirror 1 and the DC motors 5R, 5L, the number of pulse signals 31, 33 for rotation and inertial rotation in the power supply increases. and left and right vary. In addition, the sum of the number of pulse signals 31 for rotation and the number of pulse signals 33 for inertial rotation during the downward power supply is defined as the downward tilt angle.

Secondly, if the MPU12 receives the selection state detection signal from the reverse gear to other gears from the gear selection position switch 9, the MPU12 will first send a control signal to the driver circuit 11, and the driver circuit 11 will supply power to the DC motor 5L. Only the DC motor 5L on the left side is rotated upwards according to the sum of the number of pulse signals 31 for rotation and the number of pulse signals 33 for inertial rotation during the downward power supply on the left side, and is returned to its approximate initial position. And, if the DC motor 5L on the left side tilts upwards after the start delay angle T, the MPU 12 will send a control signal to the driver circuit 11 to supply power to the DC motor 5R on the right side, so that it will follow the downward power of the right side. The sum of the number of rotating pulse signals 31 being supplied and the number of inertial rotating pulse signals 33 is rotated upward to approximately return to the initial position. At this time, the time taken when only the start delay angle T is tilted is the predetermined delay time. Moreover, this starting delay angle T is 1/6 of the angle converted from the sum of the number of pulse signals 31 for rotation and the number of pulse signals 33 for inertial rotation in the downward power supply on the left side. The angle set within the range from above to 1/2 and below is, for example, set to an angle of 1/4 here. In addition, the inclination to the start delay angle T is judged by the MPU 12 by counting the upward rotation pulse signal 32 generated by the power supply.

In this way, in order to start the upward rotation of the right DC motor 5R only after the start delay angle T compared with the left DC motor 5L, after the rotation 35 and the inertial rotation 36 based on the power supply to the left DC motor 5L are completed, based on The rotation 37 of the power supply of the right DC motor 5R ends and the inertial rotation starts. Accompanying this inertial rotation of the right DC motor 5R, a spurious pulse signal (noise) 34 is detected in a motor rotation angle detection circuit (rotation angle detection means) 13L connected to the left DC motor 5L. Here, since a state in which no pulse signal exists occurs between the pulse signal 33 of coasting detected by the left motor rotation angle detection circuit (rotation angle detection means) 13L and the false pulse signal 34, the MPU 12 can recognize the pulse signal of coasting. 33 and the false pulse signal 34, therefore, the false pulse signal can be eliminated using a filter without counting the false pulse signal 34. In addition, this filtering function is introduced into the MPU12. With such a configuration, the MPU 12 can store the sum of the rotation angle and the inertial rotation angle during the upward power supply as the tilt-up rotation angle, and can discharge the false pulse signal without including the false pulse signal 34 .

To put the control in another way, the delay time is set so that the time obtained by adding the delay time to the power supply time to the right DC motor 5R is longer than the time obtained by adding the power supply time to the left DC motor 5L. The time obtained for the upper coasting is long, so after the coasting of the left DC motor 5L is completed 36, the rotation based on the power supply to the right DC motor 5R is completed 37 and the coasting starts.

After the series of control actions are finished, the inclination angles of the left and right rearview mirror bodies 4, 4 are only tilted upward by the respective inertial rotation parts compared to the initial positions. Therefore, in the next control operation, the rearview mirror is returned to the vicinity of the initial position as much as possible by taking into account this inertial rotation component and performing upward control. In addition, since the upward rotation angle and the downward tilt angle generated by the left and right power supply are equal, the upward inertial rotation component becomes the difference between the upward and downward angles of the tilt angle. Considering this inertial rotation component, the specific next series of control methods are as follows. When this time is regarded as the nth time and the next time is regarded as the n+1 time series of control, the control action of the n+1 time , the MPU 12 sends a control signal to the driver circuit 11 to supply power to the DC motor 5, making it the transfer portion obtained by subtracting the nth upward inertial rotation angle from the n+1th downward tilting rotation angle. Turn up. Because of such control, no matter how many times the control action is performed, at the point in time when the upward tilt ends, only the upward inertia rotation amount is deviated from the initial position, and it returns to the approximate original position.

Therefore, according to the control device of the remote-controlled door mirror of the first embodiment, since the rotation operation of the DC motor 5 for adjusting the inclination angle of the door mirror body 4 is paid attention to the fluctuation of the current i supplied to the DC motor 5, And according to the changing state of the current i, the rotation angle of the DC motor 5, that is, the inclination angle of the rearview mirror body 4 is detected, so even if sensors such as encoders and potentiometers are not arranged inside the rearview mirror 1, it can be easily and inexpensively The device accurately detects the inclination angle of the rearview mirror 1 and controls it. Also, in this control, since the start of the upward inclination is only staggered in the left and right by the start delay angle portion, it is possible to discriminate between the pulse signal generated from the actual rotation and the false pulse signal as noise, by using only the pulse from the rotation in the control The signal has always been able to make it return to the position closest to the initial position. And because the signal after detecting the gear selection state of the transmission is used as the downward and upward tilt start signal, only when the gear is shifted into the reverse gear for reversing, the movable parts of the left and right rearview mirrors 1, 1 are automatically activated. Tilt down from the initial position to the predetermined position, and when the gear is changed from the reverse gear to another gear after the reverse is completed, the movable parts of the left and right rearview mirrors 1 and 1 will automatically tilt upward and return to the initial position without the driver's tilt Manual actions such as starting operation and adjustment of inclination angle.

And because there is no need to secure a space for storing sensors inside the rearview mirror, it also meets the so-called requirements for increased compactness and freedom of installation. Moreover, even if the control device is an ordinary electric remote-controlled rear-view mirror for manually operating the remote control switch to adjust the angle of the rear-view mirror, it can not only be simply added without large-scale mechanical processing, but also can obtain the so-called Excellent effect that does not spoil the appearance of the rearview mirror.

In addition, in Embodiment 1, although the rotation angle of the DC motor 5 is detected from the state of change of the current i supplied from the controller 6 to the DC motor 5 , it is not limited to this, and the rotation angle applied between the terminals of the DC motor 5 can also be detected. The voltage, and according to the change state of this voltage, can also detect the rotation angle of the DC motor.

In the first embodiment, the DC motor 5 is not limited to a 3-phase motor, and for example, a 2 to 4-phase motor or a brushless motor can be used.

Furthermore, in the above-mentioned first embodiment, an example applied to a door mirror was shown, but it is not limited to this, and it is also applicable to a door mirror on a fender.

(Embodiment 2)

The control device for the electric remote-controlled rearview mirror of the automobile according to the second embodiment has the same structure as that of the first embodiment, and tilts the movable part of the rearview mirror downward from the initial position, and then tilts it upward so that it roughly returns to the original expected position. A series of position control, its composition is described below. Moreover, the same part as Embodiment 1 is demonstrated using the same figure.

Fig. 7 and Fig. 2 show the control device of the automobile electric remote control rearview mirror of embodiment 2 of the present invention, and symbol 1 among Fig. ). The rearview mirror 1 has a shell-shaped shell 2, and the actuator assembly 3 is accommodated in the shell 2. At the same time, the rearview mirror body 4 composed of a flat mirror is arranged on the rear side of the shell 2, and the rearview mirror The main body 4 is installed on the executive component assembly 3 through the base plate 25 . And the up-down direction angle of rearview mirror body 4 is, utilizes the action of DC motor 5 (DC motor: only shown in Fig. 7) that is installed in the actuator assembly 3 respectively, adjusts by the reduction gear device that does not have in the figure. . That is, the mirror body 4 and the base plate 25 are regarded as movable parts of the mirror 1 . In addition, the DC motor for adjusting the horizontal angle of the rearview mirror body 4 is also installed on the executive component assembly 3 .

The DC motor 5 is connected to a controller 6 (control device) through a harness. This controller 6 is connected on the accumulator 7 as power supply, and at least input the gear selection position switch 9 (gear selection state) from the remote control switch 8 manually operated by the driver and the gear change lever linked with the figure. The signal output from the detection unit) adjusts the power supply to the DC motor 5 and the inclination angle of the mirror body 4 of the rearview mirror 1 according to the signals input to the controller from the switches 8 and 9 . Here, the switches 8, 9 may be referred to as external signal detection means. In addition, the controller is the remaining part after removing the DC motor 5, the remote control switch 8 and the gear selection position switch 9 in FIG. 7 .

In more detail, the controller is provided with an MPU (micro processing unit: micro processing unit) that receives the signals output from the remote control switch 8 and the gear selection position switch 9, and outputs a control signal to the driver circuit 11 according to the signals. Processing unit) 12, and through the driver circuit 11 that received the control signal from MPU12, apply a DC voltage to the terminals of the DC motor 5 (although they exist on the left and right sides of the vehicle respectively, but only one is shown in Figure 18), and the DC motor 5 turn. With such a configuration, the driver of the car can easily adjust the up and down position of the rearview mirror body 4 in such a way that a suitable rear view in the horizontal direction can be obtained when sitting on the driver's seat by operating the remote control switch 8 when moving forward normally. The angle of inclination of the direction. The initial position is the position of the rearview mirror body 4 where the driver sits on the driver's seat and can obtain an appropriate rear view in the horizontal direction. Moreover, the upward direction inclination angle of the rearview mirror body 4 can be automatically adjusted according to the gear change mentioned later. Here, the driver circuit 11 corresponds to a power regulation circuit that regulates the power supplied to the DC motor 5 , and the MPU 12 corresponds to a control unit that controls the driver circuit 11 . In addition, memory and I/O interfaces of the controller are omitted in the figure.

Further, the controller has a DC motor rotation angle detection circuit 13 (rotation angle detection means) for detecting the rotation angle of the DC motor 5 based on the change state of the current i supplied to the DC motor 5 from the driver circuit 11 . The motor rotation angle detection circuit 13 detects the rotation angle of the DC motor 5 from the change state of the current i by paying attention to the variation of the supply current i due to the change of the internal impedance accompanying the rotation of the DC motor 5 . Specifically, it has: a resistor 14 for detecting the DC current i flowing from the driver circuit 11 to the DC motor 5; Circuit 15; Capacitors 21a, 21b for removing the DC component output from this filter circuit 15; Amplifying circuits 16a, 16b composed of operational amplifiers and the like for amplifying the signal with the DC component eliminated; Limiters 22a, 22b; Analog switches ( A/S) 23; and a waveform shaping circuit 17 for shaping the waveforms output from the amplifier circuits 16a, 16b into rectangular waves. Here, although the mirror body 4 is tilted up or down by forward or reverse rotation of one DC motor 5, the sign of the electric drive current from the driver circuit 11 is reversed in forward rotation and reverse rotation of the DC motor 5 . Therefore, 2 series capacitors 21a, 21b, amplifying circuits 16a, 16b, and limiters 22a, 22b are respectively set up to cater to different symbols, and only one side of the signal is selected to be sent to the waveform shaping circuit 17 through A/S23.

If the controller is described in more detail, the DC motor used in the rearview mirror 1 of Embodiment 2 is a three-phase motor as shown in Figure 3. A rotor 53 having three electromagnets 52, 52, 52 is attached, and a stator 54 made of permanent magnets is arranged outside it. A commutator 55 for supplying power to the coils of the electromagnets 52 is provided coaxially with the rotor 53 and integrally with the rotor 53 , and brushes 56 , 56 are arranged in contact with the outside of the commutator 55 .

And, if the shaft 51, the rotor 53, and the commutator 55 rotate integrally, the electromagnets 52 are turned over and over again by using the commutator 55 to change the flow direction of the current supplied from the brushes 56, 56 to the electromagnets 52. The magnetic poles of the rotor 53 are not constrained by its rotational position and the magnetic field repulsion of the stator 54, and it rotates in one direction (counterclockwise in the figure). On the other hand, if the direction of the supply current i supplied to the brushes 56, 56 is reversed, the rotor 53 rotates in the direction opposite to the direction.

And, by the rotation of such DC motor 5, along with the change of the contact position of commutator 55 and brush 56, 56 illustrated in Fig. 4A～4E, for corresponding this contact position, the coil of each electromagnet 52 The induced electromotive force changes, and as shown in FIG. 5A , the motor current i, that is, the supply current I from the driver circuit 11 to the DC motor 5 changes at a substantially constant cycle corresponding to the rotation angle of the DC motor 5 . FIG. 5A shows the changing state of the current i detected according to the voltage drop across the resistor 14 in the controller. If the waveform of the current i passes through the filter circuit 15, the signal waveform i' as shown in FIG. 5B is obtained.

Then as shown in Figure 5C, the signal is amplified by amplifier circuits 16a, 16b, and the amplified signal i" is shaped into a rectangular wave by the waveform shaping circuit 17, and then it is input to the MPU12 as the pulse signal p. Again by the calculation of the MPU12 The device counts the number of input pulse signals, and according to the count value, detects the rotation angle of the DC motor 5, that is, the inclination angle of the rearview mirror body 4. In the second embodiment, because the rotation angle of the DC motor 5 is as shown in FIGS. 5A to 5D For every change of 60°, the pulse signal p is input once. Therefore, the reduction gear ratio of driving the reduction gear device connecting the rearview mirror body 4 and the DC motor 5, for example, if it is set to be so-called when the DC motor 5 rotates 20 revolutions. , the corresponding relation of rearview mirror angle change 10 °, then when the pulse signal p counts 120 times, the inclination angle of rearview mirror body 4 changes 10 °. In addition, as shown in said Fig. 5A, because even in the motor current i contains noise components, and as shown in FIG. 5D, there is no error in the waveform-shaped pulse signal p, so the rotation angle of the DC motor 5 can be detected correctly.

Therefore, as described later, the inclination angle of the mirror body 4 can be adjusted by controlling the power supply to the DC motor 5 by the controller based on the count value of the pulse signal p. The following describes a series of controls in which the movable part of the rearview mirror 1 according to Embodiment 2 is tilted downward from the initial position, and then tilted upward to restore it to the original initial position, and how inertial rotation does not occur during this control. brake.

The start of a series of controls is the action of shifting the transmission gear into the reverse gear. If the MPU12 receives the selection state detection signal of the reverse gear from the gear selection position switch 9, in order to only change the inclination angle of the rearview mirror body 4 downward from the initial position by a predetermined amount, the MPU12 sends a signal to the driver circuit 11 to send a signal to the DC motor. 5. Power is supplied for a certain period of time, for example, 2 seconds, and the driver circuit 11 stops supplying power after supplying such power. The step of ramping down by this power supply is the ramping step. The inclination angle deviated from the initial position by a predetermined amount is an angle at which the safety check of the rear bottom is performed when the vehicle is reversing, and is specifically about 5 to 10 degrees. When the power supply is stopped, the braking is performed so that the DC motor 5 is supplied with the electric power consisting of the current opposite to the current sign of the supplied electric power to the DC motor 5 only for the predetermined first time T1, so that inertia is not generated. turn. This is the braking step. In this way, the downward tilt ends. In this downward power supply, the number of pulse signals of the DC motor 5 detected by the motor rotation angle detection circuit 13 is regarded as the downward inclination angle.

Then, if the MPU12 receives from the gear selection position switch 9 the selection state detection signal that the reverse gear is changed to other gears, the MPU12 sends a control signal to the controller circuit 11, and the control circuit 11 supplies power to the DC motor 5, so that the DC motor 5 Rotate upward to return to the initial position by the magnitude of the rotation pulse signal in the downward power supply. This is the upward slope step. After the electric power supply that tilts upward by the magnitude of the downward tilting rotation angle is completed, it enters the braking step, wherein, only at the predetermined first time T1, the DC motor 5 is supplied with a current of the opposite sign to the current of the rotation power. The constituted electric power does not produce inertial rotation. This completes the upward slope. In doing so, the mirror body 4 returns to the initial position if the upward and downward inclination ends.

The above is a series of controls for starting the inclination of the mirror body 4 by selection of the transmission gear. Next, the braking procedure will be described.

FIG. 8 is a timing chart showing the operation of the driver circuit 11 and the DC motor 5 in the second embodiment. M(+) of the driver circuit 11 indicates supply of electric power to tilt the mirror body 4 downward, and M(-) indicates supply of electric power to tilt upward. Furthermore, H indicates that power is being supplied, and L indicates that power is not being supplied. In addition, although it is not shown in the figure, before the timing of the part shown in this timing chart, the following control and motor operation are assumed as the premise that the MPU 12 issues a rotation (down) command to the driver circuit 11, and the driver circuit 11 Supply the DC motor 5 with electric power for downward rotation, and start the DC motor 5 to rotate downward.

FIG. 8 shows the start of the downward rotation of the DC motor 5 . If the DC motor 5 tilts the mirror body 4 by a predetermined amount, a reverse rotation command is issued from the MPU 12 to the driver circuit 11 . The driver circuit 11 supplies power for upward rotation consisting of a current having an opposite sign to the power current supplied just now, while stopping the power supply for downward rotation up to now. After supplying this upward rotation power only for a predetermined first time T1, a stop command is issued from the MPU 12 to the driver circuit 11, and the power supply is stopped.

The operation of the DC motor 5 when such electric power is supplied is the same as the next operation. When the reverse rotation command is issued from the MPU 12, the sign of the electric power is reversed, and the inertial force as the inertial rotation of the DC motor 5 is balanced with the reverse driving force, and the rotation of the DC motor 5 stops at this time.

Because the first time T1 is determined according to the type of the DC motor 5, the driver circuit 11, and the torque of the rearview mirror body 4, for example, it is specified as 10 to 30 msec. produce reverse rotation.

Because the control method and control device of the automobile rearview mirror 1 of the present embodiment 2 end the power supply to the DC motor 5 of the tilting rearview mirror body 4 at the same time as the power supply to the DC motor 5 during the first time period T1 Electric power consisting of a current having an opposite sign to that of the supplied electric power is supplied, so that the DC motor 5 can be reliably stopped at a point in time after the movable portion of the rearview mirror 1 is tilted by a predetermined amount without causing inertial rotation. Therefore, when the DC motor 5 is rotating, the rotating pulse signal can be counted reliably, and the rearview mirror 1 can always be returned to the initial position. The position causes its large offset.

Also, since there is no need to ensure a space for the sensor inside the rearview mirror 1, it also satisfies the so-called requirements for miniaturization and a high degree of freedom of arrangement. And even if this control device is a general electric remote-controlled rear-view mirror that adjusts the angle of the rear-view mirror with a manually operated remote control switch, it is not necessary to carry out large-scale mechanical processing, but only simple post-installation work, and can also be used. An excellent effect of not spoiling the appearance of the rearview mirror at this time is obtained.

In addition, in the above-mentioned second embodiment, although the rotation angle of the DC motor 5 can be detected from the change state of the current i supplied from the controller to the DC motor 5, it is not limited to this, and it is also possible to detect the rotation angle between the terminals of the DC motor 5. The applied voltage, and according to the change state of this voltage, the rotation angle of the DC motor 5 can also be detected. Moreover, one MPU12 can be used to control the left and right rearview mirrors.

Furthermore, in Embodiment 2, the DC motor 5 is not limited to a 3-phase motor, and for example, a 2 to 4-phase motor or a brushless motor can also be used. As the switch for driving the DC motor 5, except that the gear of the transmission gear can be selected, the manual remote control switch 8 of the driver can also be used. In this case, the switch 8 can be operated remotely to directly drive the DC motor 5 not through the MPU 12 but through a relay.

Furthermore, in the above-mentioned second embodiment, an example in which the door mirror is applied was shown, but it is not limited thereto, and it is also applicable to the fender mirror.

(Embodiment 3)

The control device for the electric remote-controlled rearview mirror of the automobile according to the third embodiment has the same structure as that of the first embodiment: the movable part of the rearview mirror is tilted downward from the initial position, and then tilted upward so that it roughly returns to the original position. A series of control of the expected position, its composition is described below. The control device of the automobile electric remote control type rearview mirror of embodiment 3, the structure of its device is the same as that of embodiment 2, and its control method is also mostly the same as that of embodiment 2, because only its braking steps are partially different, So mainly explain the different parts. In addition, the same part as Embodiment 2 is demonstrated using the same figure.

FIG. 9 is a timing chart of the operations of the driver circuit 11 and the DC motor 5 according to the third embodiment.

In the control device for the electric remote-controlled rearview mirror of the automobile according to Embodiment 3, when the DC motor 5 tilts the rearview mirror body 4 by a predetermined amount, a stop command is sent from the MPU 12 to the driver circuit 11 . The driver circuit 11 stops the power supply for the downward rotation at this time. And when a predetermined second time T2 has elapsed since the power supply was stopped, a reverse command from the MPU 12 is issued to the driver circuit 11 . Only at a predetermined first time T1', the driver circuit 11 supplies the DC motor 5 with the electric power for the upward rotation consisting of a current having an opposite sign to the power current for the downward rotation. Then, when a stop command from the MPU 12 is issued to the driver circuit 11, the power supply for the upward rotation is stopped.

The operation of the DC motor 5 when the electric power supply is stopped in this way is as follows. During the second time T2 from the first stop command to the issuance of the reverse command by the MPU 12, although the DC motor 5 is coasting, the pulse signal can be counted at this time because the rotation speed is relatively fast. Moreover, if the reverse direction command is issued from the MPU 12 and the power sign is reversed, the inertial force for inertial rotation in the DC motor 5 and the reverse driving force cancel each other out, and the DC motor 5 stops at this time.

Since the DC motor 5 coasts only for the second time T2, it can stop the coasting with a force smaller than that of the second embodiment. Therefore, if the first time T1' is 5 to 10 msec, it is preferable in order to surely stop the DC motor 5 without coasting and without causing reverse rotation. Furthermore, if the second time T2 is 10 to 60 msec, pulse counting can be performed based on the inertial rotation of the DC motor 5 at this time, which is preferable.

In addition, in Embodiment 3, although the rotation angle of the DC motor 5 is detected based on the change state of the supply current i from the controller to the DC motor 5, it is not limited to this, and the voltage applied between the terminals of the DC motor 5 may be detected. Furthermore, the rotation angle of the DC motor 5 can also be detected based on the change of this voltage. Moreover, the left and right rearview mirrors can also be controlled by one MPU12.

Furthermore, in Embodiment 3, a 3-phase motor is used as the DC motor 5, but it is not limited to this, and a 2-4 phase motor or a brushless motor may be used. As the switch for driving the DC motor 5, in addition to the selection of the speed change gear, the remote control switch 8 at the side of the driver can also be used. In this case, the remote control switch 8 may directly drive the DC motor 5 through a relay instead of the MPU 12 .

Furthermore, in the above-mentioned third embodiment, although an example in which the door mirror is applied was shown, it is not limited thereto, and it is also applicable to the fender mirror.

(Embodiment 4)

The control device for the electric remote-controlled rearview mirror of the automobile according to the fourth embodiment has the same structure as that of the first embodiment: the movable part of the rearview mirror is tilted downward from the initial position, and then tilted upward so that it roughly returns to the original expected position. A series of position control, its composition is described below. Moreover, the same part as Embodiment 1 is demonstrated using the same figure.

Fig. 10 and Fig. 2 show the control device of the automobile electric remote control type rearview mirror according to Embodiment 4 of the present invention. . The rearview mirror 1 has a shell 2, and the actuator assembly 3 is accommodated in the shell 2. A rearview mirror body 4 made of a flat mirror is arranged on the rear side of the shell 2, and the rearview mirror body 4 passes through the base plate. 25 is installed on the executive component assembly 3 .

Furthermore, although not shown in the figure, a side signal indicator lamp is arranged on the rearview mirror 1 .

The up-down angle of the rearview mirror body 4 is adjusted by the action of the DC motor 5 (DC motor: only shown in FIG. 10 ) installed in the actuator assembly 3 through the reduction gear device not shown in the figure. That is, the mirror body 4 and the base plate 25 are used as movable parts of the mirror 1 . Moreover, a DC motor (not shown) for adjusting the horizontal angle of the rearview mirror body 4 is also installed on the actuator assembly 3 .

The DC motor 5 is connected to the motor driver 11 through a resistor 12 . The motor driver 11 is connected to the MPU 6 as a control unit. The remote control switch 8 manually operated by the driver and the gear selection position switch 9 (gear selection state detecting means) interlocked with the gear changing lever are connected to the MPU6.

As shown in FIG. 10 , the MPU 6 controls the motor driver 11 according to a signal input from the remote control switch 8 or the gear selection position switch 9 . The motor driver 11 adjusts the inclination angle of the mirror body 4 of the mirror 1 by adjusting the power supply to the DC motor 5 based on the control signal input from the MPU 6 . Furthermore, in Embodiment 4, the gear selection position switch 9 corresponds to an external signal detection means.

On the designated position of the motor drive circuit 19 composed of the DC motor 5 , the motor driver 11 and the resistor 12 , the motor rotation angle detection circuit 10 as a rotation angle detection component is connected. The rotation angle detection circuit 10 detects the change in voltage applied to the resistor 12 in the motor driver circuit 19 as a waveform signal.

This waveform signal is generated as follows. As the DC motor 5 rotates, the contact position between the commutator and the brushes in the motor changes. In response to this contact position, the induced electromotive force of the coils of the electromagnets placed in the motor changes. Accompanying this change, the supply current i in the motor drive circuit 19 changes substantially periodically so as to correspond to the rotation angle of the DC motor 5 . Therefore, the voltage drop across the resistor 12 of the motor drive circuit 19 also changes. When this voltage change is detected over time, it is detected as a pulse-shaped waveform signal.

Furthermore, in Embodiment 4, side turn indicators are arranged on the rearview mirror 1 . Therefore, the current supplied to the motor is filtered so that the pulse signal from the rotation of the DC motor 5 does not adversely affect the side turn signal lamp. This rotation angle detection circuit 10 has a low-pass filter 13, high-pass filters 14a, 14b, amplifiers 15a, 15b, limiters 16a, 16b, an analog switch 17 and a waveform shaping circuit 18.

The low-pass filter 13 removes high-frequency components of noise components included in the waveform signal. The high-pass filters 14a and 14b remove low-frequency components of noise components included in the waveform signal.

In Embodiment 4, a dual system high-pass filter is used. This is because the load on the DC motor 5 is different between the downward tilting and the upward tilting of the mirror body 4 , and therefore it is necessary to change the supply current for forward rotation and reverse rotation. If the current supplied to the DC motor 5 varies, the voltage of the resistor 12 varies also. As a result, the filter characteristics of the forward rotation high-pass filter 14a and the reverse rotation high-pass filter 14b are set in advance so that the voltage changes detected during the forward rotation and the reverse rotation of the DC motor 5 are respectively applied.

The high-pass filters 14a, 14b are respectively connected with amplifiers 15a, 15b. Each operational amplifier 15a, 15b amplifies the waveform signal from which noise components have been removed by the low-pass filter 13 and high-pass filter 14a, 14b, respectively.

That is, the voltage change of the resistor 12 detected by the motor rotation angle detection circuit is as weak as several hundreds of mV. Therefore, in order to shape the waveform signal into a rectangular wave by the waveform shaping circuit 18, an amplifier is used to amplify the waveform change to about several V to several tens of V to reach the limit of the equipment used in the waveform shaping circuit 18. value.

The respective amplifiers 15a, 15b are connected to the analog switch 17 via the respective limiters 16a, 16b.

The analog switch 17 is also connected to the above-mentioned MPU6. The analog switch 17 outputs one of the waveform signals output from the amplifiers 15 a and 15 b of the dual system to the waveform shaping circuit 18 according to a control signal input from the MPU 6 .

The waveform shaping circuit 18 shapes the waveform signal input from the analog switch 17 into a rectangular wave, and outputs the rectangular wave as a digital pulse signal to the MPU6.

A method of controlling the remote-controlled door mirror for a car according to Embodiment 4 will be described below.

If the driver of the car selects the reverse gear of the transmission with the shift lever for reverse, the down slope start signal can be automatically input from the gear selection position switch 9 to the MPU 6 . The MPU 6 receives the descending inclination start signal output from the gear selection position switch 9 , and outputs a control signal corresponding to the signal to the motor driver 11 .

The motor driver 11 receiving the control signal output from the MPU 6 applies a predetermined DC voltage to the terminals of the DC motors 5 of the left and right side mirrors 1 . The DC motor 5 applied with the voltage starts to rotate forward, driving the executive component assembly 3 to tilt the rearview mirror body 4 downward.

The rotation angle detection circuit 10 starts to detect the voltage change applied to the resistor 12 of the motor drive circuit 19 as a waveform signal at the same time as the DC motor 5 starts to rotate. In addition to the desired specific pulse signal generated by the rotation of the DC motor 5, the detected waveform signal also includes the high-frequency components generated after the specific pulse signal and the high frequency components that are applied in consideration of the impact on other electronic devices. low frequency components.

The detected signal is input to a low-pass filter 13 to remove high-frequency components among noise components included in the waveform signal. The filtering characteristic of the low-pass filter 13 is set in a high-frequency range higher than the desired specific pulse signal.

The waveform signal from which high-frequency components have been removed is input to a high-pass filter 14a for forward rotation and a high-pass filter 14b for reverse rotation, respectively. The filtering characteristics of these two high-pass filters are preset to be suitable for forward rotation and reverse rotation of the DC motor 5, respectively. As a result, even when there is a large voltage level difference between the forward and reverse rotation waveform signals of the DC motor 5 , the dual-system high-pass filter can remove low-frequency components corresponding to the respective voltage levels.

The waveform signal input to each high-pass filter passes through at least one high-pass filter to remove its low-frequency components. The waveform signal that has passed through the two high-pass filters is input to the analog switch 17 after the waveform is limited by the limiters 16 a and 16 b.

The MPU6 controls the analog switch 17 so that only the specific pulse signal input from the high-pass filter 14a set to the forward rotation filter characteristic among the waveform signals input from the high-pass filters 14a and 14b is output to the waveform shaping Circuit 18.

The specific pulse signal input to the waveform shaping circuit 18 is converted into a rectangular digital pulse signal and output to the MPU 6 . The digital pulse signal is only a specific pulse signal generated by the rotation of the DC motor 5 , therefore, the rotation angle of the DC motor 5 can be correctly calculated by counting the digital pulse signal.

MPU6 counts the digital pulse signal input from the waveform shaping circuit 18 of the motor rotation angle detection circuit 10, according to the relationship between the preset number of pulse signals per revolution of the motor, the 5 revolutions of the DC motor and the tilt angle of the rearview mirror, The rearview mirror angle during normal operation, the rearview mirror angle during reversing, the coefficient for correcting the inertial rotation of the DC motor 5, and the number of pulse signals input from the motor rotation angle detection circuit 10 are used to calculate the inclination angle of the rearview mirror.

In Embodiment 4, the DC motor 5 generates 6 pulse signals per revolution. If the gear ratio (reduction ratio) of the reduction gear device that connects rearview mirror body 4 and DC motor 5 is set to, for example, the corresponding relationship that the rearview mirror angle changes by 10 ° when DC motor 5 turns 20 circles, then in the figure When the pulse signal counts 120, the inclination angle of the rearview mirror body 4 changes by 10°.

The mirror angle during normal driving is the angle of the mirror at which the driver can confirm the vehicle behind during normal driving. And the angle when reversing is when reversing, the driver can confirm the self-set rearview mirror angle of the part where the rear wheel touches the ground. The driver presets these angles and stores them in MPU6.

The MPU 6 controls the motor driver according to the calculation result, and stops the rearview mirror body 4 correctly at the rearview mirror angle when reversing.

After the mirror main body 4 is stopped at the angle of the mirror when reversing, the driver reverses the car while confirming the rear downward direction using the rearview mirror. After the reverse is completed, the driver operates the shift lever to select a gear other than the reverse gear. In this way, when another gear is selected from the reverse gear, an ascending inclination start signal is automatically input from the gear selection position switch 9 to the MPU 6 .

The MPU 6 receives the rising inclination start signal from the gear selection position switch 9 , and outputs a control signal corresponding to the signal to the motor driver 11 . The motor driver 11 having received the control signal from the MPU 6 applies a predetermined DC voltage opposite to that at the time of lowering to the terminals of the DC motors 5 of the left and right side mirrors 1 . The DC motor 5 to which the voltage is applied begins to reverse to drive the actuator assembly 3 to lift and tilt the rearview mirror body 4 .

The motor rotation angle detection circuit 10 detects the voltage change applied to the resistor 12 of the motor drive circuit 19 as a waveform signal in the same way as the falling slope. The detected signal is passed through the low-pass filter 13 and the high-pass filters 14a, 14b to remove high-frequency components and low-frequency components which are noise components.

The MPU 6 controls the analog switch 17 so as to output to the waveform shaping circuit 18 only a specific pulse signal input from the high-pass filter 14 b set to an inverted filter characteristic among the waveform signals.

The specific pulse signal input to the waveform shaping circuit 18 is converted into a rectangular digital pulse signal and output to the MPU6. The MPU 6 counts the digital pulse signal input from the waveform shaping circuit 18 of the motor rotation angle detection circuit 10, and calculates the same tilt angle of the rearview mirror as in the down tilt. According to the calculation result, the MPU 6 controls the motor driver so that the rearview mirror body 4 is correctly stopped at the rearview mirror angle during normal driving.

As a result, according to the control device for car remote-controlled door mirrors according to the fourth embodiment, attention is paid to changes in the current i supplied to the DC motor 5 accompanying the rotation of the DC motor 5 that adjusts the inclination angle of the mirror body 4 . And according to the changing state of the current i, the rotation angle of the DC motor 5, that is, the inclination angle of the rearview mirror body 4 can be calculated extremely accurately.

As a result, the inclination angle of the rearview mirror can be detected and controlled with a simple and inexpensive device without disposing sensors such as encoders and potentiometers inside the rearview mirror 1 .

Moreover, this control is only to extract a specific pulse signal from the waveform signal detected in the motor driver circuit 19 through the low-pass filter 13 and the high-pass filter 14 . As a result, the inclination angle of the rearview mirror body 4 can be calculated very accurately.

And because the signal that detects the gear selection state of the transmission is used as the start signal of falling and rising tilt, so only when the gear is engaged in the reverse gear for reversing, the rearview mirror 1 is automatically tilted downward from the initial position. When the moving part reaches the specified position, after the reverse is completed and the reverse gear is shifted into another gear, the movable part of the rearview mirror 1 will be automatically tilted upwards and returned to the initial position, without the driver's tilting operation and matching tilting Angle manual operation.

Furthermore, since there is no need to secure a space for the sensor inside the rearview mirror 1, it is also possible to meet the demands for miniaturization and improvement in the degree of freedom of installation. In addition, even for general electric remote-controlled rear-view mirrors that require manual operation of the remote control switch to adjust the angle of the rear-view mirror, it can be easily applied without large-scale machining, so that the appearance of the rear-view mirror can be obtained without damaging the appearance of the rear-view mirror. excellent effect.

In addition, in Embodiment 4, although the rotation angle of the DC motor 5 can be detected based on the voltage change of the current i supplied from the MPU 6 to the DC motor 5 across the resistor 12, it is not limited to this, and the rotation angle applied to the DC motor 5 can also be directly detected. The voltage change between the terminals of the DC motor 5 can also detect the rotation angle of the DC motor 5 according to the state of the voltage change.

In the example shown in Embodiment 4, although it was shown that it is applied to the door mirror, it is not limited to this, and it is applicable to the fender mirror.

(Embodiment 5)

The control device for the electric remote-controlled rearview mirror of the automobile according to the fifth embodiment has the same structure as that of the first embodiment, and performs the following series of controls. The movable part of the rearview mirror is tilted downward from the initial position, and then tilted upward so that it is approximately Return to the original expected position, and its composition is explained below. Moreover, the same part as Embodiment 1 is demonstrated using the same figure.

Fig. 11 and Fig. 2 show the control device of the automobile electric remote control type rearview mirror according to Embodiment 5 of the present invention, and the symbol 1 in Fig. . The rear view mirror 1 has a shell 2 in the shape of a shell, and the actuator assembly 3 is accommodated in the case 2. On the vehicle rear side of the case 2, a rear view mirror body 4 made of a plane mirror is disposed substantially throughout the entire surface. The rear view mirror body 4 It is installed on the executive component assembly 3 through the base plate 25 . The up-down angle of the rearview mirror body 4 is adjusted by the action of the DC motor 5 (DC motor: only shown in FIG. 11 ) installed in the executive component assembly 3 respectively, and through the reduction gear device not shown in the figure. . That is, the mirror body 4 and the base plate 25 are used as movable parts of the mirror 1 . Moreover, the DC motor for adjusting the horizontal angle of the rearview mirror body 4 is also installed on the executive component assembly 3 .

The DC motor 5 is connected to a controller (control device) through a wire harness. This controller is connected on the accumulator 30 as automobile body power supply, and at least inputs the gear selection position switch 9 (gear selection position switch 9 (gear selection) from the remote control switch 8 manually operated by the driver and the gear change lever linked with the figure. state detection part), and at least according to these signals input to the controller from the switches 8 and 9, the power supply to the DC motor 5 and the inclination angle of the rearview mirror body 4 of the rearview mirror 1 are adjusted. Here the switches 8, 9 can serve as external signal detection means. Moreover, the controller is the remaining part after removing the storage battery 30, the DC motor 5, the remote control switch 8 and the gear selection position switch 9 in FIG. 1 .

If it is said in more detail, an MPU (micro processing unit) 12 is set on the above-mentioned controller, which receives the signal output from the remote control switch 8 or the gear selection position switch 9, and outputs a control signal corresponding to this signal to the driver circuit 11. , and utilize the driver circuit 11 that has received the control signal from the MPU12 to apply a DC voltage to the terminals of the DC motor 5 (although all exist on both sides of the vehicle respectively, but only one is shown in Fig. 1 ), then the DC motor 5 rotates . This DC voltage is supplied from the storage battery 30 to the drive circuit 11 . By such a structure, the driver of the car can easily adjust the inclination angle of the up and down direction of the rearview mirror body 4 by operating the remote control switch 8, and can obtain a suitable rear view in the horizontal direction when sitting on the driver's seat when moving forward usually. . The initial position is the position of the rearview mirror body 4 where the driver sits on the driver's seat and can obtain an appropriate rear view in the horizontal direction. Furthermore, the automatic adjustment of the inclination angle of the rearview mirror body 4 in the upward direction corresponding to gear selection described later can be performed. Here, the driver circuit 11 corresponds to a power adjustment circuit for adjusting the power supplied to the DC motor 5 and also includes a control unit for controlling the driver circuit 11 by the MPU 12 . In addition, memory or I/O interfaces in the controller are omitted in the figure.

Here, a monitoring circuit for monitoring the voltage of the storage battery 30 is included on the MPU 12 . This monitoring circuit controls the storage battery 30 and sends a supply command to the control unit in the same MPU 12 to supply power to the DC motor 5 only when the voltage is higher than a predetermined voltage. If the voltage of the storage battery 30 is below the predetermined voltage, the monitoring circuit does not issue a power supply command to the control unit, and the DC motor 5 does not rotate. In short, when the power supply voltage is equal to or lower than a predetermined voltage, control is performed to prohibit driving of the movable part.

Furthermore, the controller has a motor rotation angle detection circuit 13 (rotation angle detection means) for detecting the rotation angle of the DC motor 5 based on the change state of the current i supplied from the driver circuit 11 to the DC motor 5 . The motor rotation angle detection circuit 13 focuses on the variation of the supply current i caused by the variation of the internal impedance as the DC motor 5 rotates, and detects the rotation angle of the DC motor 5 from the variation state of the current i.

Specifically, it has: a resistor 14 for detecting the DC current i flowing from the driver circuit 11 to the DC motor 5; Circuit 15; Capacitors 21a, 21b for removing the DC component output from this filter circuit 15; Amplifying circuits 16a, 16b composed of operational amplifiers and the like that amplify and remove the signal of the DC component; Limiters 22a, 22b; Analog switches (A/ S) 23; and a waveform shaping circuit 17 for shaping the waveforms output from the amplifier circuits 16a, 16b into rectangular waves. Although only one DC motor 5 is used here to tilt the rearview mirror body 4 up or down by making it rotate forward or reversely, when the DC motor 5 rotates forwardly and reversely, the sign of the drive current from the driver circuit 11 is opposite. Therefore, in order to adapt to the two symbols, two series of capacitors 21a, 21b, amplifying circuits 16a, 16b, and limiters 22a, 22b are provided respectively, and only the signals of series 1 in the series 2 are selected by A/S23 and sent to the waveform shaping circuit 17.

If the controller is described in detail, the DC motor 5 used in the rearview mirror 1 of Embodiment 5 is a three-phase motor as shown in FIG. The rotor 53 of the three electromagnets 52, 52, 52 is provided with a stator 54 made of permanent magnets on the outer side thereof. A commutator 55 for supplying power to the coils of the electromagnets 52 is provided coaxially with the rotor 53 and integrally with the rotor 53 , and brushes 56 , 56 are provided in contact with the outside of the commutator 55 .

Moreover, if the rotating shaft 51, the rotor 53 and the commutator 55 rotate integrally, the direction of the electric current supplied from the brushes 56, 56 to the electromagnets 52 will be switched through the commutator 55, and by turning over the electromagnets 52 again and again, The polarity of the electromagnet 52, the rotor 53 does not stick to this rotational position and is opposite to the magnetic field of the stator 54, and rotates in one direction (the illustration is counterclockwise). On the other hand, if the current I supplied to the brushes 56, 56 is reversed, the rotor 53 rotates in the direction opposite to the one rotation.

4A to 4E, the induced electromotive force of the coil of each electromagnet 52 corresponds to the change of the contact position of the commutator 55 and the brushes 56, 56 as shown in FIGS. 4A to 4E. The contact position changes, and as shown in FIG. 5A , the motor current i, that is, the supply current i flowing from the driver circuit 11 to the DC motor 5 fluctuates at a substantially constant cycle corresponding to the rotation angle of the motor 5 . Fig. 5A shows the changing state of the current i detected according to the voltage drop across the resistor 14 in the controller. If the waveform of the current i passes through the filter circuit 15, the waveform signal i' shown in Fig. 5B will be obtained.

Next, as shown in Fig. 5C, amplify the signal with amplifying circuits 16a, 16b, then use the waveform shaping circuit 17 to amplify the amplified signal i" into a rectangular wave, and input this signal into the MPU12 as the pulse signal p. Use the MPU12 again The counter counts the input pulse signal, and according to the count value, detects the rotation angle of the DC motor 5, that is, the inclination angle of the rearview mirror body 4. In Embodiment 5, because the DC motor shown in Figures 5A to 5D The pulse signal p is input once every time the rotation angle of 5 changes by 60°, so if the gear ratio of the reduction gear unit driving the rearview mirror body 4 and the DC motor 5 is set, for example, after the DC motor 5 rotates 20 times, If the mirror angle changes by 10°, the inclination angle of the rearview mirror body 4 changes by 10° when the pulse signal p counts 120 times. In addition, because even as shown in FIG. 5A, noise components are included in the current i , there will be no error in the pulse signal p after waveform shaping as shown in FIG. 5D , so the rotation angle of the DC motor 5 can also be detected correctly.

As a result, as will be described later, the inclination angle of the mirror body 4 can be adjusted by using the controller to control the power supply to the DC motor 5 based on the count value of the pulse signal. A series of controls performed by the control means of the fifth embodiment will be described below. The movable part of the rearview mirror 1 is tilted downward from the initial position, and then tilted upward to return to the initial position.

The beginning of a series of controls is the action of shifting the transmission gear into reverse gear. If the MPU12 receives the detection signal of the selection state of the reverse gear from the gear selection position switch 9, the monitor circuit included in the MPU12 monitors the voltage of the storage battery 30, and when the voltage is higher than the predetermined voltage, the voltage is turned on in the MPU12. The power supply command is issued from the monitoring circuit to the control unit, and the power supply described below is performed, and when the battery voltage is lower than a predetermined voltage, the power supply command is not issued, so that the power supply is not performed, and the rearview mirror body 4 is turned on. remain stopped.

The predetermined voltage here can be set to a higher voltage than the higher voltage of the following two voltages: the DC motor 5 can reliably drive the rearview mirror body 4 according to the specified amount of voltage obtained by the instruction from the MPU12. or the lowest voltage among the voltages of the storage battery 30 at which the pulse signal having a pulse amplitude that can be counted by the MPU 12 is generated. If the voltage of the battery 30 driving the DC motor 5 is low, the amplitude of the pulse signal decreases, and if the voltage of the battery 30 is lower than the voltage value of the battery 30, the MPU 12 cannot count the pulse signal. Moreover, since the predetermined voltage differs depending on the types of the mirror body 4, the DC motor 5, and the MPU 12, it is set for each type of the mirror body 4, the DC motor 5, and the MPU 12. In addition, since the operation of the mirror body 4 and the DC motor 5 becomes abnormal over time, it is preferable to set the predetermined voltage to a large value, specifically, 12 to 16V.

If the monitored result battery 30 voltage is greater than the predetermined voltage, the monitoring circuit sends a power supply command to the control unit, and then the MPU12 sends an instruction to the drive circuit to supply power to the DC motor 5 for a certain period of time, such as 2 seconds, so that The inclination angle of the mirror body 4 changes downward by a predetermined amount from the initial position, and the driver circuit 11 stops supplying such power after supplying it. The predetermined inclination angle from the initial position is an angle at which the safety check of the rear lower side can be performed when reversing the vehicle, and more specifically, it is about 5 to 10 degrees. At this point, this downward slope ends. Also, the number of pulse signals of the DC motor 5 detected by the motor rotation angle detection circuit 13 during this downward power supply is regarded as the downward tilt angle, and is stored in the MPU 12 as a control unit. At this time, the number of pulse signals generated by the inertial rotation of the DC motor 5 after the power supply is completed is also included in the downward tilt angle.

Thereafter, if the MPU 12 receives a selection state detection signal from the gear selection position switch 9 for shifting from the reverse gear to another gear, the MPU 12 monitors the voltage of the storage battery 30 . If the voltage of the battery 30 is below a predetermined voltage, the mirror body 4 is kept in a stopped state without power supply. If the voltage of the storage battery 30 is higher than the predetermined voltage, in the MPU12, the monitoring circuit sends a power supply command to the control unit, according to the pulse signal of the rotation of the DC motor 5 in the downward power supply stored in the control unit. The size of the number rotates upwards and returns to the initial position, sends a control signal to the driver circuit 11, and the driver circuit 11 supplies power to the DC motor 5 to make it tilt upward with the size of the downward tilt angle, so far the upward tilt ends. During this upward tilt, the pulse signal number of the DC motor 5 rotation (comprising inertial rotation) detected by the motor rotation angle detection circuit 13 is also stored in the MPU12 as an upward tilt angle of rotation, and it is used for the next time to the next time. Down tilt control. After doing this, if the downward and upward inclination ends, the rearview mirror body 4 returns to the initial position.

The above is a series of controls in which the inclination of the mirror body 4 is started by selection of the transmission gear.

The control method and control device of the automobile rearview mirror 1 according to Embodiment 5 are as follows: the monitoring circuit in the MPU 12 monitors the voltage of the storage battery 30, and if the voltage is below a predetermined voltage, the DC motor 5 is not driven, and the rearview mirror 1 is maintained as the rearview mirror 1. The rearview mirror body 4 of the movable part is in a stopped state. As a result, because the voltage of the storage battery 30 is low, when the voltage of the rearview mirror body 4 cannot be normally tilted, the rearview mirror body 4 is not driven, so the rearview mirror body 4 does not stop at an abnormal position. And, similarly, when the voltage of the storage battery 30 drops, the size of the rotation pulse signal of the DC motor 5 becomes smaller, and when it becomes impossible to count, because the power supply command will not be sent from the monitoring circuit to the control unit, the rearview mirror body 4Keep still and do not perform abnormal control actions.

In addition, although the monitoring circuit in Embodiment 5 monitors the voltage of the battery 30 to determine whether it is higher than a predetermined voltage when receiving a signal from the gear selection position switch 9 , it may always monitor the voltage of the battery 30 . When always monitoring, whether the judgment signal (power supply command when large) is greater than the predetermined voltage can be sent to the control unit always, or can be sent to the control unit when receiving the signal from the gear selection position switch 9. And, the moment of starting to drive the DC motor 5 is not limited to when the signal from the gear selection position switch 9 is input, it may also be the moment when the signal from the remote control switch 8 is input, or when other signals are input. The configuration of the controller is not limited to the configuration shown in Fig. 11 either, it can also be, for example, omit the limiters 22a, 22b, or change the dual series into a single series and omit the A/S23 configuration, and other configurations can also be added. part. Furthermore, the method of controlling the power supply to the DC motor 5 is not limited to the method of Embodiment 5, for example, it may be controlled while measuring the inclination angle of the mirror body 4 with a sensor. It may also have a device for notifying the driver that the voltage of the battery 30 is lower than the predetermined voltage when the monitoring circuit monitors that the voltage is lower than the predetermined voltage, such as an alarm.

(Embodiment 6)

The control device of the electric remote-controlled rearview mirror of the automobile according to the sixth embodiment has the same structure as that of the first embodiment: the movable part of the rearview mirror is tilted downward from the initial position, and then tilted upward so that it returns approximately to the original initial position. The position is controlled in series, and its composition is described below. In addition, the same parts as those in Embodiment 1 will be described using the same figure.

Fig. 12 and Fig. 2 show the control device of the automobile electric remote control type rearview mirror of embodiment 6 of the present invention, and among Fig. ). The rearview mirror 1 has a shell 2, and the actuator assembly 3 is accommodated in the shell 2, and a rearview mirror body 4 made of a flat mirror is arranged on the rear side of the shell 2, and the rearview mirror body 4 is formed by a base mirror. The disc 25 is installed on the executive component assembly 3 .

Utilize the action of the DC motor 5 (DC motor: only shown in FIG. 12 ) installed in the actuator assembly 3 respectively, and adjust the vertical angle of the rearview mirror body 4 through the reduction gear device not shown in the figure. That is, the mirror body 4 and the base plate 25 are used as movable parts of the mirror 1 . Moreover, a DC motor (not shown) for adjusting the horizontal angle of the rearview mirror body 4 is also installed on the actuator assembly 3 .

The DC motor 5 is connected to a motor driver 11 via a resistor 12 . The motor driver 11 is connected to the MPU 6 as a control unit. A remote control switch 8 manually operated by the driver and a gear selection position switch 9 linked with a gear changing lever are connected to the MPU6.

At a predetermined position of a motor drive circuit 19 formed by the DC motor 5, the motor driver 11 and the resistor 12, a motor rotation angle detection circuit 10 as a rotation angle detection means is connected. The rotation angle detection circuit 10 detects a change in voltage applied to the resistor 12 in the motor drive circuit 19 as a waveform signal.

This waveform signal includes a specific pulse signal generated by the rotation of the DC motor 5 . This specific pulse signal is generated as follows. As the DC motor 5 rotates, the contact positions of the commutator and the brushes in the DC motor 5 change.

In response to this contact position, the induced electromotive force of the coils of the plurality of electromagnets formed in the DC motor 5 changes. Along with this change, the supply current i in the motor drive circuit 19 changes substantially periodically in accordance with the rotation angle of the DC motor 5 .

Therefore, the voltage drop at the end of the resistor 12 of the motor drive circuit 19 also changes. If this voltage change is tracked and detected, it is converted into a pulse-like signal and detected. After this specific pulse signal, a high frequency component with opposite polarity to this specific pulse signal occurs.

The rotation angle detection circuit 10 has: a low-pass filter 13 , a DC interrupter 14 , an amplifier 15 , a limiter 16 and a waveform shaping circuit 17 .

The low-pass filter 13 cuts off the high-frequency component of the waveform signal, and the DC cutter 14 cuts off the DC component to extract a desired pulse signal included in the waveform signal.

Amplifier 15, corresponding to detecting the characteristics of the DC motor 5 and the position of the waveform signal, or corresponding to the filtering characteristics of the filter, choose to use any one of non-inverting amplifiers or inverting amplifiers.

For example, in Embodiment 1 in which a non-inverting type amplifier is used for the amplifier 15, the rotation angle detection circuit 10 receives a change in voltage from the drive circuit 19 connected between the resistor 12 on the positive side of the motor driver 11 and the motor 5 as a waveform Signal Detection. In this case, the waveform signal detected by the rotation angle detection circuit 10 from the drive circuit 19 is shown in FIGS. 13A and 13B.

Fig. 13A is a waveform signal obtained from the DC motor 5 during forward rotation. Fig. 13B is a waveform signal obtained from the DC motor 5 during reverse rotation. The waveform signal at the time of forward rotation and the waveform signal at the time of reverse rotation have substantially vertically symmetrical waveform shapes because the polarity of the voltage applied to the DC motor 5 changes.

In Fig. 13A and Fig. 13B, a, a' are specific pulse signals generated by the rotation of DC motor 5, b, b' are high-frequency components generated after the specific pulse signal, c, c' are high-frequency components The pulse signal generated by the ringing phenomenon.

The filters 13 and 14 used in the motor rotation angle detection circuit 10 are set to pass the allowable band, so that when the DC motor 5 is rotating forward, only the specific pulse signal a is extracted, and when the DC motor 5 is rotating reversely, only the specific pulse signal a is extracted. High frequency component b'. The pulse signals thus extracted have the same polarity. Therefore, it can be amplified by one amplifier.

The specific pulse signal a or the high-frequency component b' extracted by the filter is amplified by the amplifier 15 . That is, when the DC motor 5 is rotating forward, only the specific pulse signal a generated by the rotation of the DC motor 5 is non-inverted and amplified; b'.

The specific pulse signal a or high-frequency component b′ non-inverted and amplified by the amplifier 15 is input to the waveform shaping circuit 17 through the limiter 16 . The limiter 16 removes a portion equal to or greater than a predetermined value, such as a specific pulse signal, which has been excessively amplified by the amplifier 15 . As a result, it is possible to prevent each element included in the waveform shaping circuit 17 and the MPU 6 from being input with a pulse signal exceeding the input specification.

The waveform shaping circuit 17 shapes the amplified pulse signal which is an analog signal into a rectangular wave, and outputs the rectangular wave to the MPU 6 as a digital pulse signal.

The digital pulse signal output from the rotation angle detection circuit 10 is input to the MPU 6 and counted. According to the preset number of pulse signals per one revolution of the motor, the relationship between the number of revolutions of the DC motor 5 and the inclination angle of the rearview mirror, the angle of the rearview mirror during normal operation, the angle of the rearview mirror during reversing, and the correction The inclination angle of the rearview mirror is calculated from the coefficient of the inertial rotation of the DC motor 5 and the pulse signal input from the motor rotation angle detection circuit 10 .

The MPU 6 controls the motor driver 11 according to the calculation result, and accurately stops the mirror body 4 at the rearview mirror angle during reversing or the rearview mirror angle during normal driving.

According to Embodiment 1, currently, in order to amplify pulse signals having different polarities at the time of forward rotation and reverse rotation of the DC motor 5 , it is possible to reduce the rotation angle detection circuits necessary for two systems to a single system.

FIG. 14 is a block diagram showing the configuration of another embodiment. The resistor 12 is connected to the negative side of the motor driver 11 . The rotation angle detection circuit 10 detects a voltage change from a drive circuit 19 between the DC motor 5 and the resistor 12 . In Embodiment 2 using this method, a pulse signal as shown in FIGS. 15A and 15B is included in the detected waveform signal.

FIG. 15A is a waveform signal obtained when the DC motor 5 rotates forward, and FIG. 15B is a waveform signal obtained when the DC motor 5 rotates reversely. The waveform signal at the time of forward rotation and the waveform signal at the time of reverse rotation generally exhibit vertically symmetrical waveform shapes due to positive and negative changes in the voltage polarity of the DC motor 5 .

In Fig. 15A and Fig. 15B, a, a' are specific pulse signals generated by the rotation of the DC motor 5, b, b' are high-frequency components generated after the specific pulse signal, and c, c' are the high-frequency components due to the high-frequency A pulse signal produced by the ringing phenomenon of the components.

The motor rotation angle detection circuit 10 extracts these pulse signals from the detected waveform signals by using a low-pass filter 13 and a DC cut-off device 14 .

The filter 13 and the DC interrupter 14 are set to pass through the allowable band, and only extract the high-frequency component b when the DC motor 5 is rotating forward, and only extract the specific pulse signal a' when the DC motor is rotating reversely, so that The extracted pulse signals have the same polarity. Therefore, it is possible to amplify using one amplifier.

Since the amplifier 15 uses an inverting amplifier, the high-frequency component b shown in FIG. 15A is inverted and amplified to a signal shown in FIG. 15C when the DC motor 5 is rotating forward. When the DC motor 5 reverses, the specific pulse signal a' generated by the rotation of the DC motor 5 shown in FIG. 15B is reversed and amplified into a signal shown in FIG. 15D.

The high-frequency component b or the specific pulse signal a′ inverted and amplified by the amplifier 15 is input to the waveform shaping circuit 17 through the limiter 16 .

The waveform shaping circuit 17 shapes the amplified pulse signal, which is an analog signal, into a rectangular wave, and outputs it to the MPU 6 as a digital pulse signal.

The digital pulse signal output from the rotation angle detection circuit 10 is input into the MPU6 and counted. According to the preset number of pulse signals per one revolution of the motor, the relationship between the number of revolutions of the DC motor 5 and the inclination angle of the rearview mirror, the angle of the rearview mirror during normal operation, the angle of the rearview mirror during reversing, and the correction The inclination angle of the rearview mirror is calculated from the coefficient of the inertial rotation of the DC motor 5 and the number of pulse signals input from the motor rotation angle detection circuit 10 .

The MPU 6 controls the motor driver 11 according to the calculation result, so that the rearview mirror body 4 stops correctly at the rearview mirror angle when reversing or the rearview mirror angle when driving normally.

Even in the second embodiment, in order to amplify pulse signals having different polarities when the DC motor 5 rotates forward and reverse, it is possible to reduce the rotation angle detection circuit which requires two systems to a single system.

According to the relationship between the characteristics of the DC motor 5 used and the position of the waveform signal, etc., the waveform signal may include the pulse signal shown in FIGS. 16A and 16B as in the third embodiment.

FIG. 16A is a waveform signal when the DC motor 5 is rotating forward, and FIG. 16B is a waveform signal when the DC motor 5 is rotating reversely.

In Fig. 16A and Fig. 16B, a, a' are the specific pulse signals generated when the DC motor 5 rotates, b, b' are the high-frequency components generated after the pulse signal, and c, c' are the high-frequency components that pass through the high-frequency components. A pulsed signal produced by the ringing phenomenon.

The rotation angle detection circuit 10 extracts these pulse signals from the detected waveform signal using a low-pass filter 13 and a DC cutoff 14 .

The filter 13 and the DC interrupter 14 are set with an allowable band, so that only the high frequency component b is extracted when the DC motor 5 is rotating forward, and only the specific pulse signal a' is extracted when the DC motor 5 is rotating reversely.

Since the amplifier 15 is a non-inverting amplifier, the high-frequency component b shown in FIG. 16A is non-invertingly amplified when the DC motor 5 is rotating forward. Furthermore, when the DC motor 5 is reversed, the specific pulse signal a' generated by the rotation of the DC motor 5 shown in FIG. 16B is amplified non-inverted.

The thus amplified high-frequency component b or specific pulse signal b' is input to a waveform shaping circuit 17 via a limiter 16 .

The waveform shaping circuit 17 shapes the amplified pulse signal, which is an analog signal, into a rectangular wave, and outputs it to the MPU 6 as a digital pulse signal.

The digital pulse signal output from the rotation angle detection circuit 10 is input to MPU6 and counted. And MPU6 controls the inclination angle of rearview mirror body 4 according to the digital pulse signal of input.

In Embodiment 3, in order to amplify the pulse signals with different polarities generated when the DC motor 5 rotates forward and reverse, the rotation angle detection circuit that requires two systems can be reduced to a single system.

Furthermore, the waveform signal may include the pulse signal shown in FIGS. 17A to 17D as in Example 4 from the relationship between the characteristics of the DC motor 5 used and the position of the waveform signal.

FIG. 17A is a waveform signal when the DC motor 5 rotates forward. FIG. 17B is a waveform signal when the DC motor 5 reverses.

In Fig. 17A and Fig. 17B, a, a' are the specific pulse slave signals generated by the rotation of the DC motor 5, b, b' are the high frequency components generated after the specific pulse signal, and c, c' are the high frequency components generated by the high frequency A pulse signal produced by the ringing phenomenon of the components.

The motor rotation angle detection circuit 10 extracts these pulse signals from the detected waveform signal using a low-pass filter 13 and a DC cutoff 14 .

The filter 13 and the DC interrupter 14 are set with an allowable band, so that only the specific pulse signal a is extracted when the DC motor 5 is rotating forward, and only the high frequency component b' is extracted when the DC motor 5 is rotating reversely. The pulse signals thus extracted have the same polarity. Therefore, it can be amplified by one amplifier.

Because the amplifier 15 is an inverting amplifier, when the DC motor 5 is rotating forward, the specific pulse signal a shown in FIG. 17A is inverted and amplified into the signal shown in FIG. 17C . On the other hand, when the DC motor 5 reverses, the high-frequency component b' generated by the rotation of the DC motor 5 shown in FIG. 17B is inverted and amplified into a waveform shown in FIG. 17D.

The thus amplified pulse signal is input to a waveform shaping circuit 17 via a limiter 16 .

The waveform shaping circuit 17 shapes the amplified pulse signal, which is an analog signal, into a rectangular wave, and inputs it into the MPU 6 as a digital pulse signal. And MPU6 controls the inclination angle of rearview mirror body 4 according to the digital pulse signal of this input.

Next, a description will be given of how the driver operates the controls.

If the driver of the car selects the reverse gear of the transmission with the shift lever for the reverse, the down slope start signal is automatically input from the gear selection position switch 9 to the MPU 6 . The MPU 6 receives the down-slope start signal output from the gear selection position switch 9 , and inputs a control signal corresponding to the signal to the motor driver 11 . The motor driver 11 receiving the control signal from the MPU 6 applies a predetermined DC voltage to the terminals of the DC motors 5 of the left and right side mirrors 1 respectively. After the voltage is applied, the DC motor 5 starts to rotate forward, and drives the actuator assembly 3 to tilt the rearview mirror body 4 downward.

If the rearview mirror body 4 starts to descend and tilt like this, the control device just controls the inclination angle of the rearview mirror body 4 as explained above.

When the mirror main body 4 is stopped at the angle of the mirror when reversing, the driver performs reversing while confirming the rear downward direction with the mirror. After the reverse is completed, the driver operates the shift lever to select a gear other than the reverse gear. In this way, if another gear is selected from the reverse gear, the device automatically inputs an ascending inclination start signal from the gear selection position switch 9 to the MPU 6 .

The MPU 6 receives the rising slope start signal output from the gear selection position switch 9 , and outputs a control signal corresponding to the signal to the motor driver 11 . The motor driver 11 receiving the control signal output from the MPU6 applies a predetermined DC voltage with opposite signs to the terminals of the DC motors 5 of the rearview mirror 1 on the left and right sides respectively. After the voltage is applied, the DC motor 5 starts to reverse, and drives the actuator assembly 3 to raise and tilt the rearview mirror body 4 .

If the rearview mirror body 4 starts to rise and tilt like this, the control device controls the angle of the rearview mirror body 4 as explained above.

(Embodiment 7)

The control device for the electric remote-controlled rearview mirror of the automobile according to the seventh embodiment has the same structure as that of the first embodiment: the movable part of the rearview mirror is tilted downward from the initial position, and then tilted upward to approximately return to the original initial position. A series of position control, its composition is described below. Moreover, the same part as Embodiment 1 is demonstrated using the same figure.

18 and FIG. 2 show the control device of the automobile electric remote control type rearview mirror according to Embodiment 7 of the present invention. In FIG. The rearview mirror 1 has a shell 2 in the shape of a shell, accommodates the actuator assembly 3 in the shell 2, and arranges a rearview mirror body 4 made of a flat mirror substantially throughout the entire surface at the vehicle rear of the casing 2. The rearview mirror body 4 It is installed on the executive component assembly 3 through the base plate 25 . And the up-down direction angle of rearview mirror body 4 is respectively through the action of DC motor 5 (DC motor: only shown in FIG. adjusted. That is, the mirror body 4 and the base plate 25 are used as movable parts of the mirror 1 . Moreover, a DC motor (not shown) for adjusting the horizontal angle of the rearview mirror body 4 is also installed on the actuator assembly 3 .

The DC motor 5 is connected to a controller (control device) through a wire harness. This controller is connected with the storage battery as the power supply of the car, and at least inputs the signal output from the remote control switch 8 manually operated by the car driver and the gear selection position switch 9 linked with the gear change lever not shown in the figure, and according to these Signals from the switches 8 and 9 are input to the controller to adjust the power supplied to the DC motor 5 , thereby adjusting the inclination angle of the rearview mirror body 4 of the rearview mirror 1 . Here, the switches 8, 9 can serve as external signal detection means. And, the controller is the remaining part after removing the DC motor 5, the remote control switch 8 and the gear selection position switch 9 in Fig. 18 .

In more detail, the controller is provided with an MPU (micro processing unit) 12, which receives the signals output from the remote control switch 8 or the gear selection position switch 9, and outputs control signals corresponding to these signals to the driver circuit 11. Signal, through the driver circuit 11 that has received the control signal from MPU12 again, add DC voltage to the terminal of DC motor 5 (although all exist respectively in car both sides respectively, only show one in Fig. 18 ), then DC motor 5 turn. With such a configuration, the driver of the car can easily adjust the inclination angle of the rearview mirror body 4 in the up and down direction by operating the remote control switch 8, so that the driver can easily adjust the inclination angle in the horizontal direction when sitting on the driver's seat. rear view. The initial position is the position of the rearview mirror body 4 where the driver sits on the driver's seat and can obtain an appropriate rear view in the horizontal direction. Moreover, the automatic adjustment of the inclination angle of the rearview mirror body 4 in the up-down direction can be performed according to the gear selection mentioned later. Here, the driver circuit 11 corresponds to a power adjustment circuit for adjusting the power supplied to the DC motor 5 , and further includes a control means for controlling the driver circuit 11 by the MPU 12 . In addition, memory and I/O interfaces in the controller are omitted in the figure.

The controller has a motor rotation angle detection circuit 13 (rotation angle detection means) that detects the rotation angle of the DC motor 5 based on the change state of the current i supplied from the driver circuit 11 to the DC motor 5 . The motor rotation angle detection circuit 13 detects the rotation angle of the DC motor 5 from the change state of the current i by paying attention to the variation of the supply current i according to the change of the internal impedance of the rotation operation of the DC motor 5 .

Specifically, it has: two electric wires 35a, 35b connecting the DC motor 5 and the driver circuit 11; resistors 14a, 14b for detecting the DC current i flowing from the driver circuit 11 to the DC motor 5 as an electrical signal a selector 32 to select one of the currents flowing through these resistors 14a, 14b; a filter circuit 15 composed of a low-pass filter that removes high-frequency components in the current waveform; Component capacitor 21; amplifying circuit 16 composed of an operational amplifier that cuts off the DC component signal; limiter 22; and waveform shaping circuit 17 for shaping the waveform output from amplifier circuit 16 into a rectangular wave.

Here, although one DC motor 5 is used, and the mirror body 4 is tilted up or down by its normal rotation or reverse rotation, the sign of the drive current output from the driver circuit 11 in the forward rotation and reverse rotation of the DC motor 5 on the contrary. Here, the resistors 14a, 14b are connected in series to each of the two electric wires 35a, 35b, and a signal from either of the resistors 14a, 14b is selected by the selector 32, and sent to the subsequent circuit. In this way, the incoming signals are always in phase. The selector 32 is controlled by the MPU 12 to select the signal.

As a comparison, in the controller shown in Fig. 28, a single resistor 14 is connected in series on a wire, and the current flowing through the resistor 14 during forward and reverse rotation is obtained as a signal. For the controller of the comparative form, since the phases of the signals are opposite during forward rotation and reverse rotation, two sets of capacitors 21a, 21b, amplifier circuits 16a, 16b and limiters 22a, 22b are respectively provided, and the waveform shaping circuit 17 An A/S (Analog Switch) 23 for selecting one of the signals and sending it is set above. Furthermore, in forward rotation and reverse rotation, signal detection is performed by separate circuits between the filter circuit 15 and the A/S 23 . In this comparative form, the number of components is twice as large as that of Embodiment 7, which is disadvantageous in terms of cost and circuit layout space. And in the comparative form, since the types of the DC motor 5 are different according to the types of vehicles equipped with the controller, it is necessary to set two sets of different parameters to set the capacitors 21a, 21b, the amplifier circuits 16a, 16b and the limiter respectively. The procedure for setting the amplituders 22a and 22b is complicated, but in Embodiment 7, since the capacitor 21, the amplifier 16, and the limiter 22 are each provided one by one, parameter setting is simple and the setting time is shortened.

If the controller is described in more detail, the DC motor 5 used on the rearview mirror 1 of Embodiment 7 is a three-phase motor as shown in FIG. A rotor 53 of three electromagnets 52 , 52 , 52 is attached to the insulating member, and a stator 54 made of permanent magnets is disposed outside the rotor 53 . A commutator 55 for supplying power to the coils of the electromagnets 52 is provided coaxially with the rotor 53 and integrally with the rotor 53 , and brushes 56 , 56 are provided in contact with the outside of the commutator 55 .

Moreover, if the rotating shaft 51, the rotor 53, and the commutator 55 rotate integrally, the flow direction of the current supplied from the brushes 56, 56 to the electromagnets 52 is changed by the commutator 55, and the electromagnets are turned over and over again. 52 polarity, the rotor 53 is not restricted in its rotational position and the magnetic field repulsion of the stator 54, and it rotates in one direction (counterclockwise in the figure). On the other hand, when the direction of the current i supplied to the brushes 56, 56 is reversed, the rotor 53 rotates in a direction opposite to the one direction.

And, by such a rotation operation of the DC motor 5, as the contact position of the commutator 55 and the brushes 56, 56 is changed as shown in FIGS. Correspondingly, as shown in FIG. 5A , the motor current i, that is, the supply current i from the driving circuit 11 to the DC motor 5 , roughly changes periodically corresponding to the rotation angle of the DC motor 5 . This current change is an electrical signal of a change state of the power supply amount accompanying the rotation operation of the DC motor 5 . FIG. 5A shows the change state of the current i detected according to the voltage drop across the resistors 14a, 14b in the controller. If the waveform of the current i passes through the filter circuit 15, a signal waveform i' as shown in FIG. 5B is obtained.

Next, as shown in Figure 5C, the signal is amplified with the amplifying circuit 16, and the amplified signal i "is shaped into a rectangular wave with the waveform shaping circuit 17, and is sent to the MPU12 as a pulse signal p. And, with the counter of the MPU12 The input pulse signal is counted, and according to the count value, the rotation angle of the DC motor 5 is detected, that is, the inclination angle of the rearview mirror body 4. In the seventh embodiment, as shown in FIGS. 5A to 5D , the rotation angle of the DC motor 5 is Change 60 °, just input a pulse signal p, so if the gear ratio of the reduction gear device driving the connection rearview mirror body 4 and the DC motor 5 is set to, for example, the rearview mirror will change when the DC motor 5 rotates 20 times. If the corresponding relationship is 10°, then when the pulse signal p counts 120 times, the inclination angle of the rearview mirror body 4 will change by 10°. In addition, even if the motor current i shown in Figure 5A contains noise components, because the As shown in FIG. 5D , there is no error in the number p of pulse signals after waveform shaping, so the rotation angle of the DC motor 5 can be accurately detected.

As a result, as will be described later, the inclination angle of the mirror body 4 can be adjusted by controlling the power supply to the DC motor 5 by the controller based on the count value of the pulse signal p. A series of controls performed by the control means of the seventh embodiment to tilt the movable portion of the door mirror 1 downward from the initial position and then tilt upward to return to the initial position will be described below.

The beginning of a series of controls is the action of shifting the transmission gear into reverse gear. When the MPU 12 receives the reverse gear selection state detection signal output from the gear selection position switch 9, it issues a command to perform the power supply described below.

First, the MPU 12 sends an instruction to the driver circuit 11 to supply power to the DC motor 5 for a certain period of time, such as 2 seconds, so that the inclination angle of the rearview mirror body 4 is tilted downward from the initial position to change a predetermined amount, and the driver circuit 11 is on. After supplying such electric power, the electric power supply is stopped. The predetermined amount of inclination angle downward from the initial position is an angle at which the safety check of the rear lower side can be performed when reversing the vehicle. Specifically, it is about 5 to 10 degrees. In this way, the downward slope ends. In addition, the number of pulse signals accompanying the rotation of the DC motor 5 detected by the motor rotation angle detection circuit 13 during the downward power supply is regarded as the downward tilt rotation angle, and is stored in the MPU 12 as the control unit. . At this time, the number of pulse signals generated by the inertial rotation of the DC motor 5 after the end of the power supply is also included in the downtilt angle.

Then, if the MPU 12 receives the selection state detection signal from the reverse gear to other gears from the gear selection position switch 9, the control part will supply the driver circuit 11 with the above-mentioned downward electric power stored only by making the DC motor 5 rotate upwards. The magnitude of the pulse signal number of the rotation in the supply makes it return to the initial position by sending a control signal, and then the driver circuit 11 supplies power to the DC motor 5 to make it tilt upward with the magnitude of the downward tilt angle, so that the upward tilt Finish. The number of pulse signals detected by the motor rotation angle detection circuit 13 during this upward tilt, accompanied by the DC motor 5 (including inertial rotation), is stored in the MPU 12 as an upward tilt rotation angle, and it is used for the next downward movement. Tilt controls. If such upward and downward tilting ends, the mirror body 4 returns to the initial position.

The above is a series of controls in which the inclination of the mirror body 4 is started by selection of the transmission gear.

Because the control method and control device of the automobile rearview mirror 1 according to the seventh embodiment obtain signals from mutually different electric wires 35a and 35b to control the forward rotation and reverse rotation of the DC motor 5, Therefore, the phase of the signal is always the same, and the constituent parts of the motor rotation angle detection circuit 13 are reduced. As a result, the cost can be reduced, and at the same time, the motor rotation angle detection circuit 13 can be reduced in size and miniaturized. Furthermore, setting of circuit constants of the motor rotation angle detection circuit 13 can also be easily performed.

In addition, the electrical detection signal of the rotation of the DC motor 5 may also use a voltage value. And the timing of starting to drive the DC motor 5 of Embodiment 7 is not limited to the timing when the signal from the gear selection position switch 9 is input, but may also be when the signal from the remote control switch 8 is input or when other signals are input. time. The configuration of the controller is also not limited to the configuration shown in FIG. 18 , and it may be a configuration in which the limiter 22 is omitted or other components are added, for example. It can also correspond to the control of power windows and other automotive electrical appliances. Also, the method of controlling the power supply to the DC motor 5 is not limited to the method of the seventh embodiment. For example, it may be controlled while measuring the inclination angle of the mirror body 4 with a sensor. The selector 32 may also use a relay unit or utilize other circuits. Furthermore, the connecting portion of the electric wires from which signals are taken out from the electric wires 35a, 35b may be between the resistors 14a, 14b and the driver circuit 11.

(Embodiment 8)

The control device for the electric remote-controlled rearview mirror of the automobile according to the eighth embodiment has the same structure as that of the first embodiment, and tilts the movable part of the rearview mirror downward from the initial position, and then tilts it upward so that it roughly returns to the original expected position. A series of position control, its composition is described below. Moreover, the same part as Embodiment 1 is demonstrated using the same figure.

Fig. 19 and Fig. 2 show the control device of the automobile electric remote control type rearview mirror according to Embodiment 8 of the present invention, and the symbol 1 in Fig. . The rearview mirror 1 is installed on the lower end of the front pillar of the automobile body, and has a shell 2 in the shape of a shell. The actuator assembly 3 is accommodated in the shell 2, and a rearview mirror composed of a plane mirror that is substantially throughout the entire surface is arranged behind the shell 2. The main body 4 and the rearview mirror main body 4 are installed on the executive component assembly 3 through the base plate 25 . And the angle of the up and down direction of rearview mirror body 4 is, according to the action of DC motor 5 (DC motor: only shown in Fig. 19) that is installed in the actuator assembly 3 respectively, adjust by the reduction gear device that does not have in the figure. .

As shown in FIG. 19 , the DC motor 5 is connected to the rearview mirror control device 6 through a wire harness. When the rear view mirror control device 6 is connected to the storage battery (not in the figure) as the power supply, it is at least input from the remote control switch 8 manually operated by the driver of the car or linked with the gear change lever not shown in the figure. The output signal of the gear selection position switch 9 (gear selection state detection part), and it adjusts the supply current to the DC motor 5 according to the signals input to the controller from the switches 8 and 9, thereby adjusting the rear view mirror 1. The inclination angle of mirror body 4. Moreover, the rearview mirror control device 6 is the remaining part after removing the battery 30, the DC motor 5, the remote control switch 8 and the gear selection position switch 9 in FIG. 19 .

If it is said in more detail, the rearview mirror control device 6 is provided with an MPU (microprocessing unit) 12, which receives the signal output from the remote control switch 8 or the gear selection position switch 9, and sends the signal to the driver circuit 11 according to this signal. Output the control signal, and through the driver circuit 11 that has received the control signal from MPU12, apply DC voltage to the terminals of the DC motor 5 (although they exist respectively on the left and right sides of the vehicle, but only one is shown in FIG. 19 ), the DC motor 5 turn. With such a configuration, the driver of the car can easily adjust the inclination angle of the rearview mirror body 4 in the up and down direction by operating the remote control switch 8, so that when usually moving forward, the driver's seat can get an appropriate inclination angle in the horizontal direction. Rear horizon. The initial position is the position of the rearview mirror body 4 where the driver sits on the driver's seat and can obtain an appropriate rear view in the horizontal direction. Furthermore, automatic adjustment of the inclination angle of the mirror body 4 in the up-down direction corresponding to gear selection as described later can be performed. In addition, memory and I/O interfaces in the controller are omitted in the figure.

The mirror control device 6 includes a motor rotation angle detection circuit 13 (motor rotation angle detection device) for detecting the rotation angle of the DC motor 5 based on the change state of the current i supplied from the driver circuit 11 to the DC motor 5 . The motor rotation angle detection circuit 13 detects the rotation angle of the DC motor 5 from the change state of the current i by paying attention to the change of the supply current I due to the change of the internal impedance accompanying the rotation of the DC motor 5 . Specifically, it has: a resistor 14 for detecting the DC current i flowing from the driver circuit 11 to the DC motor 5; Circuit 15; Capacitors 21a, 21b that cut DC components from the output from this filter circuit 15; Amplifying circuits 16a, 16b composed of operational amplifiers that amplify the signals that cut DC components; Limiters 22a, 22b; a switch (A/S) 23; and a waveform shaping circuit 17 for shaping and converting the signals output from the amplifier circuits 16a and 16b into rectangular wave pulse signals having a predetermined pulse width. Among them, the resistor 14 to the amplifier circuits 16a and 16b constitute the signal generation unit 30, and the waveform shaping circuit 17 constitutes the signal output unit. Here, although the mirror body 4 is tilted up or down by forward rotation or reverse rotation of one DC motor 5 , the sign of the drive current output from the driver circuit 11 is reversed during forward rotation and reverse rotation of the DC motor 5 . Therefore, capacitors 21a, 21b, amplifying circuits 16a, 16b, and limiters 22a, 22b are arranged in 2 series in order to match respective signs, and A/S23 selects one signal to send to waveform shaping circuit 17.

If the rearview mirror control device 6 is described in more detail, the DC motor 5 used in the rearview mirror 1 of the eighth embodiment is a 3-phase motor as shown in Figure 3, as well known, it will have 3 electromagnetic The rotor 53 of iron 52, 52, 52 is attached to the shaft 51 of the DC motor 5 through an insulating member, and a stator 54 made of permanent magnets is arranged outside it. Further, a commutator 55 for supplying power to the coils of the electromagnets 52 is provided coaxially with the rotor 53 and integrally with the rotor 53 , and brushes 56 , 56 are arranged in contact with the outside of the commutator 55 .

And if the rotating shaft 51, the rotor 53 and the commutator 55 rotate integrally, the flow direction of the electric current supplied from the brushes 56, 56 to each electromagnet 52 is changed by the commutator 55, thereby turning over the direction of the electromagnet 52 again and again. polarity, the rotor 53 is not constrained by its rotational position and the repulsion of the magnetic field of the stator 54 and rotates in one direction (counterclockwise in the figure). On the other hand, if the direction of the current i supplied to the point brushes 56, 56 is reversed, the rotor 53 rotates in the direction opposite to the one direction.

And, by such a rotation operation of the DC motor 5, as the contact position of the commutator 55 and the brushes 56, 56 is changed as shown in FIGS. The position changes correspondingly. As shown in FIG. 5A , the motor current i, that is, the supply current i from the drive circuit 11 to the DC motor 5 changes approximately periodically corresponding to the rotation angle of the DC motor 5 . FIG. 5A shows the change state of the current i detected according to the voltage drop across the resistor 14 in the controller. If the waveform of the current i passes through the filter circuit 15, the waveform signal i' as shown in FIG. 5B will be obtained.

Next, as shown in FIG. 5C, the signal is amplified by the amplifying circuits 16a and 16b, and the amplified signal i" is transformed into a pulse signal of a rectangular wave with a specified pulse width by the waveform shaping circuit 17, and then sent to the MPU12.

Furthermore, the counter of the MPU 12 counts the input pulse signal, and according to the count value, detects the rotation angle of the DC motor 5 , that is, the inclination angle of the rearview mirror body 4 . Because in the eighth embodiment, as shown in FIGS. 5A to 5D , the pulse signal p is input once every time the rotation angle of the DC motor 5 changes by 60°, if the motor connecting the rearview mirror body 4 and the DC motor 5 is driven The gear ratio of the reduction gear device is set such that the rearview mirror changes by 10° when the DC motor 5 rotates 20 times, then the inclination angle of the rearview mirror body 4 changes by 10° when the pulse signal counts 120 times.

As a result, as described later, the inclination angle of the mirror body 4 can be adjusted by controlling the power supply to the DC motor 5 by the mirror control device 6 based on the count value of the pulse signal.

Furthermore, the waveform shaping circuit 17 is configured such that the motor rotation speed is relatively low in the start-up period and the transition period, and the motor rotation speed is relatively high in the stable period. The pulse width of the pulse signal sent out by the shaping circuit 17 is short. Specifically, the pulse width of the pulse signal changes in two stages with a specific motor speed as the limit, so that the pulse width of the pulse signal in the start-up period and even the transition period is set to limit the width of the pulse combination of the pulse signal (the first pulse signal ), the pulse width of the pulse signal in the stable period is set to a width (second pulse signal) that limits the pulse division of the pulse signal.

The specific motor rotation speed as the limit is, for example, the motor rotation speed when the pulse width of the first pulse signal becomes a predetermined value close to the pulse period. In this case, the first and second Pulse signal. Furthermore, as the specific motor rotational speed of the boundary, it is also possible to select the motor rotational speed when a pulse signal having a larger pulse width than the first pulse signal is observed due to pulse combination of the first pulse signal. In this case, since the count value of 1 pulse portion decreases, it is necessary to compensate the count value. Moreover, if the specific motor speed as the limit is experimentally measured from the start-up period to the transition period to the stable period, for example, after 3 seconds from the start-up, if the transition period turns to the stable period, then it can also be selected at the start-up period. Motor RPM after 3 seconds. However, in this case, since there is a tendency to be uncertain depending on usage conditions such as temperature and voltage, the stability thereof is low.

Alternation of the pulse width of such a pulse signal can be performed by setting the waveform shaping circuit 17 itself or by changing the constant of the external resistance of the pulse signal generating chip of the waveform shaping circuit 17 .

A series of controls for tilting the movable portion of the rearview mirror 1 downward from the initial position and then tilting upward to return to the original initial position will be described below.

The beginning of a series of controls is the action of shifting the transmission gear into the reverse gear. If MPU12 receives the selection state detection signal of reverse gear from gear selection position switch 9, MPU12 just sends instruction to driver circuit 11, makes it supply certain hour, for example is the electric power of 2 seconds to DC motor 5, thereby makes rearview mirror The tilt angle of the rearview mirror of the main body 4 is tilted downward by a predetermined amount from the initial position, and after the driver circuit 11 supplies such power, the supply ends. A predetermined amount of inclination angle downward from the initial position is an angle at which the safety check of the rear lower side is performed when the vehicle is reversing, and is about 5 to 10 degrees. In this downward power supply, the number of pulse signals for the rotation of the DC motor 5 detected by the motor rotation angle detection circuit 13 is regarded as the downward tilt rotation angle.

Then, if the MPU12 receives the selection state detection signal from the reverse gear to other gears from the gear selection position switch 9, the MPU12 sends a control signal to the driver circuit 11, and the driver circuit 11 supplies power to the DC motor 5, so that the DC motor 5. Rotate upward only by the number of rotation pulse signals in the downward power supply to return to the initial position.

According to the rearview mirror control device 6 configured as above, it has the motor rotation angle detection circuit 13, and the waveform shaping circuit 17 has a structure such that the pulse width of the pulse signal at a higher rotation speed becomes shorter than when the rotation speed of the motor is relatively low. Therefore, when the motor speed is low during the motor start-up period and the transition period, as shown in FIG. 20, the pulse width is short, and it is difficult for the waveform shaping circuit to recognize the waveform disorder such as the ringing phenomenon that has occurred between signals as a signal. Suppresses the occurrence of so-called pulse splitting. On the other hand, when the rotational speed of the motor is high in the stable period of the motor, since the pulse width is wide as shown in FIG. 21, it is difficult to recognize multiple signals as one signal by the waveform shaping circuit, thereby suppressing the occurrence of so-called pulse combining. As a result, it is possible to control the tilt angle of the mirror with high precision corresponding to the rotation angle of the DC motor 5 .

In addition, in the eighth embodiment, although the pulse width of the pulse signal of the waveform shaping circuit 17 is controlled in two stages, it is not particularly limited thereto, and multi-stage control or continuous control may be performed.

Possibility of industrial use

As described above, the present invention is applicable to tilt control of rearview mirrors of automobiles.

Claims (25)

1. automotive rear-view mirror control device,

Be connected with two Direct Current Motors of the movable part of the left and right sides back mirror that drives automobile respectively, with the angle of inclination of the above-below direction of regulating body of backsight mirror, by regulating the action control of the electric power of this Direct Current Motor being supplied with the movable part that carries out this back mirror,

It has:

Detection is from the outward sign detection part of exterior actuating signal;

The power regulation circuit that adjusting is supplied with the electric power of described Direct Current Motor;

Two corner detection parts are separately positioned between described power regulation circuit and described two Direct Current Motors, and according to the variable condition of the electric power delivery volume of the rotational action of following this Direct Current Motor, detect the corner of this Direct Current Motor; With

Function unit, according to the signal from described corner detection part, control is supplied with the electric power of described Direct Current Motor by described power regulation circuit,

Described function unit carries out from the movable part of the downward-sloping described back mirror of primary position, then it is inclined upwardly and roughly be reduced to the beginning primary position a succession of control,

It is constructed as follows,

When importing downward-sloping commencing signal from described external signal detection part; By described power regulation circuit to described two d.c. motor supply capabilities; So that the movable part of described two rearview mirrors is from the downward-sloping scheduled volume of primary position; And; The rotational angle that produces because of inertia after rotational angle during the electric power that will detect by described two roll angle inspection parts when downward-sloping is supplied with and electric power are supplied with and stopped and; As the downward-sloping rotational angle of this two d.c. motor and store respectively

This automotive rear-view mirror control device has following feature:

When input is inclined upwardly commencing signal after described outward sign detection part is imported described downward-sloping commencing signal, thereby the movable part that makes the back mirror of this side by described power regulation circuit to the described Direct Current Motor supply capability of a side is inclined upwardly with the amount that only equates with downward-sloping rotational angle that this function unit is stored and makes it roughly return primary position, in this tilting procedure, upwards fascinate to forward at this Direct Current Motor and set downward-sloping rotational angle 1/6 that this function unit stores and above 1/2 and during following initiating retard angle for, utilize described power regulation circuit to opposite side Direct Current Motor supply capability, and the amount that the downward-sloping rotational angle degree stored in movable part this function unit with the Direct Current Motor of this opposite side that coexists of back mirror of opposite side is equated is inclined upwardly and roughly is returned to primary position

When being inclined upwardly of described two back mirrors, upwards rotational angle in will supplying with by the electric power separately of described two detected described two Direct Current Motors of corner detection part, that supply with the rotational angle that makes progress that produces because of inertia after stopping with electric power and store separately as the corner that is inclined upwardly, and, to stop the noise to detect by described corner detection part the back to eliminating the counting of the corner that is inclined upwardly upwards rotating of producing based on described inertia, will make progress in this control of a succession of described back mirror movable part reaches downward inclination rotational angle and is used for making and is inclined upwardly and roughly returns the control of primary position.

2. automotive rear-view mirror control device as claimed in claim 1 is characterized in that:

The gear selection mode detection part of the change-speed box that described outward sign detection part is an automobile, it constitutes, when selecting the reverse gearwheel of described change-speed box, output decline inclination commencing signal, on the other hand, from described reverse gearwheel during to the change of other gears, output up-wards inclination commencing signal.

3. automotive rear-view mirror control device as claimed in claim 1 is characterized in that:

Next time being controlled to be of a succession of described back mirror movable part, will be deducting resulting result in the downward-sloping rotational angle of the difference up and down of the inclination corner in this control from control next time as supply capability in control next time and the rotational angle that is inclined upwardly.

4. automotive rear-view mirror control device as claimed in claim 1 is characterized in that:

Described function unit is constructed as follows, in downward-sloping end or be inclined upwardly when finishing, roughly with being supplied with, finishing simultaneously the electric power of described Direct Current Motor, the electric power that will constitute by electric current with the opposite current symbol of this electric power, by described power regulation circuit, only, supply with to this Direct Current Motor in the predetermined very first time.

5. automotive rear-view mirror control device as claimed in claim 1 is characterized in that:

Described function unit is constructed as follows, when downward-sloping end or be inclined upwardly when finishing, only from the electric power of described Direct Current Motor being supplied with the predetermined very first time that begins through the time point of the second predetermined time after stopping, the electric power that will constitute by electric current with the opposite current symbol of this electric power, by described power regulation circuit, supply with to described Direct Current Motor.

6. automotive rear-view mirror control device as claimed in claim 1 is characterized in that:

Described corner detection part is constructed as follows, it will follow the rotational action change of voltage that produce, that be positioned on the resistor between this Direct Current Motor and motor driver of described Direct Current Motor to be detected as waveform signal, and from this detected waveform signal, extract the certain pulses signal that the rotation because of this Direct Current Motor produces, and output;

Simultaneously described function unit is constructed as follows, and counting is from the certain pulses signal of described corner detection part output, the angle of inclination of calculating described body of backsight mirror according to this count value, and control described motor driver according to this result of calculation;

Described corner detection part has: remove be included in the detected waveform signal as the radio-frequency component of noise composition and the bandpass filter of low-frequency component; With the waveform shaping circuit that will become square wave and export from the certain pulses signal shaping of this bandpass filter output.

7. automotive rear-view mirror control device as claimed in claim 6 is characterized in that:

Described bandpass filter is constituted by the low-pass filter of removing the radio-frequency component in the noise composition and the high-pass filter of removing the low-frequency component in the noise composition.

8. automotive rear-view mirror control device as claimed in claim 7 is characterized in that:

Described bandpass filter is constituted by the high-pass filter of removing the low-pass filter that is included in the radio-frequency component in the described waveform signal and remove the low-frequency component in the waveform signal when being included in described Direct Current Motor and just changeing respectively and be included in the dual system of the low-frequency component in the waveform signal when reversing

Also have analog switch, it is according to the indication of described function unit, and any one that will be from each certain pulses signal of the high-pass filter output of described dual system outputs to described waveform shaping circuit.

9. automotive rear-view mirror control device as claimed in claim 6 is characterized in that:

Described bandpass filter is to be made of the active filter with amplifier.

10. automotive rear-view mirror control device as claimed in claim 1 is characterized in that:

Also have:

Power supply is to described Direct Current Motor supply capability; With

Supervisory circuit is monitored the power line voltage of described power supply, and only when it is bigger than predetermined voltage, sends electric power by described power regulation circuit to described function unit and supply with order, with to described Direct Current Motor supply capability.

11. automotive rear-view mirror control device as claimed in claim 1 is characterized in that:

Described corner detection part constitutes, the rotational action change of voltage that produce, that be positioned on the resistor between this Direct Current Motor and motor driver of following described Direct Current Motor is detected as waveform signal, and from this detected signal, extract the predetermined pulse signal, and output

Simultaneously described function unit constitutes, and counting is from the impulse singla of described corner detection part output, the angle of inclination of calculating described body of backsight mirror according to this count value, and control described motor driver according to this result of calculation,

Described corner detection part has: the filter that extracts predetermined impulse singla from waveform signal; The amplifier that will amplify by the impulse singla that this filter extracted; With will be shaped to the waveform shaping circuit of square wave by the impulse singla that this amplifier has amplified,

Described amplifier has following formation: when described Direct Current Motor is just changeing, the non-counter-rotating of certain pulses signal that will be produced by the rotation of this Direct Current Motor is amplified, on the other hand, when described Direct Current Motor reversed, the non-counter-rotating of radio-frequency component that will generate after rotating the certain pulses signal that produces by this Direct Current Motor was amplified.

12. automotive rear-view mirror control device as claimed in claim 11 is characterized in that:

Described amplifier has following formation: when described Direct Current Motor is just changeing, the radio-frequency component counter-rotating that will generate after rotating the certain pulses signal that produces by this Direct Current Motor is amplified, on the other hand, when described Direct Current Motor reversed, the certain pulses signal counter-rotating that will produce by the rotation of this Direct Current Motor was amplified.

13. automotive rear-view mirror control device as claimed in claim 1 is characterized in that:

Also have 2 wires that connect described Direct Current Motor and described power regulation circuit,

Described corner detection part is constructed as follows: is connected on described 2 wires, and, detects the rotational angle of this Direct Current Motor according to the electric signal of the variable condition of the electric power delivery volume of the rotation of following described Direct Current Motor,

Described power regulation circuit is constructed as follows simultaneously: under the situation of the be inclined upwardly angle and the downtilt angles of regulating described body of backsight mirror of regulating described body of backsight mirror, supplying with electric current by the electric power of being supplied with to described Direct Current Motor respectively is the electric power that the electric current of contrary sign each other constitutes

And described corner detection part has following formation: when regulating the angle of inclination that makes progress of described body of backsight mirror, 1 from described 2 wires obtains signal, when regulating downward angle of inclination, from this 2 wire in addition 1 obtain signal.

14. automotive rear-view mirror control device as claimed in claim 1 is characterized in that:

Described corner detection part has:

Signal generation, described Direct Current Motor revolution is crossed predetermined angular, sends prearranged signals; With

Signal output portion, input is from the signal of this signal generation, and this signal shaping is transformed into the impulse singla and the output of predetermined pulse width,

Described signal output portion is following formation:

Compare motor rotary speed relatively low the time, the pulse width of described impulse singla shortens when rotating speed is higher.

15. automotive rear-view mirror control device as claimed in claim 14 is characterized in that:

Described signal output portion has following formation:

With specific motor rotary speed is the boundary, and the pulse width of described impulse singla is 2 grades of variations.

16. automotive rear-view mirror control device as claimed in claim 14 is characterized in that:

The pulse width of the impulse singla when the specific motor rotary speed of the revolution ratio of described motor is fast is set at the pulse combination that limits this impulse singla.

17. automotive rear-view mirror control device as claimed in claim 14 is characterized in that:

The pulse width of the impulse singla when the specific motor rotary speed of the revolution ratio of described motor is slow is set at the pulse that limits this impulse singla and cuts apart.

18. an automotive rear-view mirror control method,

2 Direct Current Motors drive the movable part of vehicle right and left back mirror respectively, to regulate the angle of inclination of body of backsight mirror, by regulating the supply capability to this Direct Current Motor, carry out the action control of the movable part of this back mirror, and this method comprises:

Step 1, by respectively to described Direct Current Motor supply capability, the movable part of back mirror that makes described both sides is to a direction predetermined oblique angle, and rotational angle and the electric power of the electric power of storage this Direct Current Motor separately in supplying with is supplied with the rotational angle that produces because of inertia after stopping

This automotive rear-view mirror control method is characterised in that, also comprises:

Step 2; By rotating this d.c. motor to described each d.c. motor supply capability; Make the described electric power separately to a direction of the rearview mirror movable part inclined in opposite directions of described both sides in supplying with corner and electric power supply with adding of the corner that produces based on inertia after stopping and the time; Make to beginning of supplying with of the electric power of this d.c. motor of a side and beginning to postpone scheduled delay and tilt than what supply with to the electric power of opposite side d.c. motor; And rotational angle and the electric power of the electric power of storage this d.c. motor separately in supplying with is supplied with the rotational angle that produces because of inertia after stopping

Described scheduled delay is set at: when the movable part of the back mirror of the described both sides of reverse inclination, adding the time that obtain this delay time on the electric power service time of the Direct Current Motor of a described side, to stop the back long by the resulting time of rotation time that inertia produces than supplying with at electric power at the Direct Current Motor that adds this opposite side on the electric power service time of described opposite side Direct Current Motor.

19. automotive rear-view mirror control method as claimed in claim 18 is characterized in that:

By driving this Direct Current Motor to described Direct Current Motor supply capability, after the movable part that makes described back mirror tilted specified amount up or down, electric power that will opposite electric current constitutes by the current symbol of the electric power of being supplied with was therewith supplied with to this Direct Current Motor in the predetermined very first time.

20. automotive rear-view mirror control method as claimed in claim 19 is characterized in that:

From supply with to the electric power of described Direct Current Motor stop after through the time point after the second predetermined time, carry out the described electric power that constitutes by the electric current of contrary symbol and supply with.

21. automotive rear-view mirror control method as claimed in claim 18 is characterized in that:

It also has following steps:

Waveform signal detects step, will be detected as waveform signal by the rotational action of described Direct Current Motor change of voltage that produce, on the resistor between this Direct Current Motor and the motor driver;

Certain pulses signal extraction step is extracted in described waveform signal and detects the certain pulses signal by described Direct Current Motor rotation generation that is comprised in the detected waveform signal in the step;

The angle of inclination calculation procedure, the certain pulses signal that counting extracts in described certain pulses signal extraction step, and the angle of inclination of calculating described body of backsight mirror according to this count value; With

The supply capability controlled step, according to result calculated in the calculation procedure of described angle of inclination, control makes described body of backsight mirror stop at predetermined angular from the supply capability of described motor driver to described Direct Current Motor,

In described certain pulses signal extraction step, detect the radio-frequency component in the detected waveform signal in the step by removing with low-pass filter, and remove low-frequency component, thereby extract the certain pulses signal with high-pass filter at described waveform signal.

22. automotive rear-view mirror control method as claimed in claim 18 is characterized in that:

Monitoring is to the power line voltage of the power supply of described Direct Current Motor supply capability, and when driving the movable part of described back mirror from halted state, if this power line voltage is the following situation of predetermined voltage, just the movable part with this back mirror remains halted state.

23. automotive rear-view mirror control method as claimed in claim 18 is characterized in that:

It also has following steps:

Waveform signal detects step, and the change of voltage of rotational action resistor that produce, between this Direct Current Motor and motor driver that will be by described Direct Current Motor is detected as waveform signal;

The impulse singla extraction step by filter, is extracted in described waveform signal and detects the certain pulses signal that is comprised in the detected waveform signal of step;

The signal amplification procedure, non-counter-rotating is amplified or counter-rotating is amplified in the impulse singla that extracts in the described impulse singla extraction step;

The wave shaping step, it is to carrying out Waveform Control and be shaped to square wave in described signal amplification procedure amplified pulse signal;

The angle of inclination calculation procedure, the square wave of counting after the shaping of described wave shaping step, and the angle of inclination of calculating body of backsight mirror according to this count value; With

The supply capability controlled step, according to the result of calculation of described angle of inclination calculation procedure, control is supplied with to the electric power of described Direct Current Motor from motor driver, makes described body of backsight mirror stop at predetermined angular.

24. automotive rear-view mirror control method as claimed in claim 18 is characterized in that:

Utilize the electrical signal of the corner of described Direct Current Motor, regulate through electric power and supply with the supply capability that electric wire is supplied with to this Direct Current Motor, thereby carry out the action control of this back mirror movable part,

Supply with electric wire from mutually different described electric power and obtain separately detection signal, make at the detection signal of detection signal with the time that is inclined upwardly during angle of regulating described body of backsight mirror to have identical phase place in the adjusting downtilt angles.

25. automotive rear-view mirror control method as claimed in claim 18 is characterized in that:

It has following steps:

The signal generation step, described Direct Current Motor revolution is crossed predetermined angular, just sends prearranged signal; With

The signal shaping shift step, the signal that will in described signal generation step, take place, shaping is transformed into the impulse singla of predetermined pulse width,

In described signal shaping shift step, than motor rotary speed when relatively low, shorten the pulse width of the impulse singla of rotating speed when high.

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