JP2002144864A - Detecting device for pinching of window glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detecting device for the pinching of window glass capable of precise updating of a threshold value and attaining highly precise detection of the pinching based on the determination of the conditions at the opening and closing operations of the window glass when learning control for updating the threshold value is conducted. SOLUTION: A door switch 28 and a vehicle speed sensor 26 are provided to detect the vehicle condition at the opening and closing operations of the window glass. After pinching determination is given the first priority, a computing part 12 compares the pulse period with the threshold value of a pulse and the threshold value is updated when a difference value therebetween is more than a permissible change amount serving as a criteria for evaluation for updating the threshold value and the door switch 28 and the vehicle speed sensor 26 detect the stopping of the vehicle and the closing of the door. Therefore, the updating of the threshold value by the computing part 12 is conducted precisely, thus preventing updating from being performed with abnormal data due to different vehicle conditions as a new threshold value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting the presence or absence of a window glass.

[0002]

2. Description of the Related Art Conventionally, some vehicles have a power window device for raising and lowering a window glass by a driving force of a motor or the like. In this power window device, a motor is driven by operating a switch provided on each door to raise and lower the window glass.

[0003] By the way, many of such power window devices have a function of preventing pinching. More specifically, the pinch prevention function is controlled when, for example, a foreign object is caught between the window glass and the window frame while the window glass is performing the closing operation, and further closing operation cannot be performed. The circuit detects the jam. Then, the window glass is operated in the opening direction, which is the opposite direction, to release the caught foreign matter.

[0004] For example, there is a pulse detection method for detecting that this foreign matter is caught. The pulse detection method is performed by detecting a rotation speed of a motor that opens and closes a window glass and generating a pulse signal having a period proportional to the detected speed. The control circuit performs pinch detection using the fluctuation of the pulse cycle (rotational speed of the motor).

[0005] Then, in order to make this pinch detection correspond to different types of vehicles or vehicles, or to cancel the aging of the vehicle and to always achieve a stable operation, it is necessary to determine the presence or absence of the pinch state. There is known a system (so-called learning control) for changing a threshold value as needed.

In this learning control, data (pulse cycle) based on a pulse signal when the window glass is opened and closed is compared with a current threshold value. When it is determined that the difference has changed by a predetermined value or more, a new threshold is updated and set based on the acquired data.

[0007]

By the way, when the window glass is opened and closed, the load applied to the window glass changes due to, for example, a difference in the opening and closing state of the door and a difference in the running state of the vehicle. In particular, the load on the window glass is not uniform since the road surface condition constantly changes in the running state of the vehicle. For example, when the vehicle is running on a bad road, the load applied to the window glass is larger than when the vehicle is stopped.

As a result, if the threshold value is updated on the basis of the abnormal data detected when the vehicle is running or the like and the threshold value is changed to a value greater than or equal to a predetermined value, even if a foreign object is caught when the vehicle is stopped or the like. Nevertheless, there is a problem that the pinch is not detected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to perform learning control for updating a threshold value based on a determination of a situation when opening and closing a window glass. Another object of the present invention is to provide an apparatus for detecting the presence / absence of pinching of a window glass, which can accurately update a threshold value and realize highly accurate pinch detection.

[0010]

In order to solve the above-mentioned problems, the invention according to claim 1 stops or reverses the driving of a motor that drives a window glass when the window glass is pinched. Drive control means having a pinch prevention function, data corresponding to the rotation of the motor and a threshold for determining the presence or absence of pinch are compared and determined, and when the difference exceeds an allowable change amount, the threshold is set. In a window glass pinching presence / absence detection device including a determination update unit that performs a threshold update process for updating, a vehicle environment parameter detection unit that includes at least a traveling state detection unit that detects a traveling state of the vehicle when the window glass opens and closes. When the vehicle environment parameter including the traveling state does not satisfy a predetermined condition, the determination updating unit performs the threshold updating. And gist not to perform value update processing.

According to a second aspect of the present invention, in the first aspect, the predetermined condition in the running state of the vehicle is whether or not the vehicle is stopped. The gist is that threshold update processing for updating is not performed.

According to a third aspect of the present invention, there is provided a driving control means having a pinching prevention function for stopping or reversing the driving of a motor for driving a window glass when the pinching by a window glass occurs, and for controlling the rotation of the motor. Compare and determine the corresponding data and a threshold for determining the presence or absence of pinching,
When the difference exceeds the allowable change amount, in a window glass pinching presence / absence detection device including a determination update unit that performs a threshold update process for updating the threshold, the traveling state of the vehicle when the window glass opens and closes is determined. A vehicle environment parameter detection unit including at least a traveling state detection unit for detecting, and a plurality of the thresholds are set as situation correspondence thresholds corresponding to detection results detected from the vehicle environment parameter detection unit; According to the detection result of the vehicle environment parameter detection means,
The gist is to compare and determine the data corresponding to the rotation of the motor with any one of the situation correspondence thresholds.

According to a fourth aspect of the present invention, the vehicle environment parameter detecting means according to any one of the first to third aspects, wherein the vehicle environment parameter detecting means detects a door opening / closing state, and a battery. The gist of the present invention is to provide a battery voltage detecting means for detecting a voltage, a temperature detecting means for detecting an external temperature condition, and detecting an acceleration applied to a vehicle.

According to the fifth aspect of the present invention, there is further provided a state change detecting means for judging whether or not there is a state change relating to the vehicle based on the vehicle environment parameter during operation of the window glass, wherein the state change detecting means is provided. It is essential that the determination updating means does not perform the threshold updating process for updating the threshold when detecting the state change of the vehicle.

According to the first aspect of the present invention, in the learning control for updating the threshold value, when the data corresponding to the rotation of the motor is compared with the threshold value by the determination updating means, the vehicle environment parameter detecting means. It is determined whether or not the vehicle environment parameters detected in the step satisfy the predetermined condition. And
At least when the detection result of the traveling state that greatly affects the update of the threshold value does not satisfy the predetermined condition, the threshold update process by the determination update unit is not performed. On the other hand, when the vehicle environment parameters including the traveling state satisfy the predetermined condition, the threshold updating process is performed by the determination updating unit. Therefore, the update of the threshold value performed only under the predetermined condition is accurately performed, and the malfunction due to the erroneous update of the threshold value does not occur when it is determined that the window glass is caught.

According to the second aspect of the present invention, when traveling of the vehicle is detected by the traveling state detecting means, abnormal data which is inappropriate as data for updating the threshold value is likely to be detected.
No threshold update process is performed by the determination update unit.

According to the third aspect of the present invention, in the learning control for updating the threshold value, the determination updating means responds to the rotation of the motor in accordance with the status of each vehicle environment parameter detected by the vehicle environment parameter detecting means. A comparison is made with the obtained data and any one of the plurality of situation correspondence thresholds.
Therefore, the update of the threshold value is accurately performed according to the state of each vehicle. In the case of pinch detection, any one of the situation thresholds is compared with data corresponding to the situation of the vehicle environment parameter.

According to the fourth aspect of the present invention, the detection of the vehicle environment parameter at the time of opening and closing the window glass further includes at least one of a door state detecting means, a battery voltage detecting means, a temperature detecting means and an acceleration detecting means. The data acquisition situation is detected in more detail,
The update of the threshold value is performed accurately.

According to the fifth aspect of the present invention, during the operation of the window glass, data at the time of a state change relating to a vehicle in which abnormal data is likely to be detected is not updated as a new threshold value.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) An embodiment in which the present invention is embodied in a power window device for a side door of a vehicle will be described below with reference to FIGS.

FIG. 1 is a block diagram showing the electrical configuration of the power window device. In FIG. 1, a controller 11 as a drive control unit, a determination update unit, and a state change detection unit includes a calculation unit 12 and a storage unit 13. The calculation unit 12 performs various calculations. The storage unit 13 includes a rewritable memory unit (RAM) for storing the operation results and the like by the operation unit 12, a read-only memory unit (ROM) for storing various control programs, and an electrically writable / erasable unit. Non-volatile memory (EEP
ROM).

A power window switch 15 as a window switch including a down switch, an up switch, and an automatic operation switch (auto switch) includes an input circuit 1
6 is connected to the controller 11. The power window switch 15 is, as shown in FIG.
It is provided on the inner surface of the. The up switch is a switch for operating the window glass 18 in the closing direction (upward), and the down switch is a window glass 1.
8 is a switch for operating the shutter 8 in the opening direction (downward). Both switches are two-step click type and selectively switch the swinging power window switch 15, that is,
The on / off operation is performed by pressing one side (down side) or the other side (up side) one step.

The auto switch fully opens the window glass 18 based on an operation of pressing the down side or the up side of the power window switch 15 by two steps.
This is a switch for operating in a fully closed state.

On the other hand, a drive motor 19 as a motor for raising or lowering the window glass 18 is constituted by a DC motor, and is connected to the controller 11 via a drive / switching circuit 20 as a drive circuit. The drive / switching circuit 20 includes a controller 11
Supplies or stops the drive power to the drive motor 19 and switches the circuit for normal rotation or reverse rotation on the basis of the drive control signal from. That is, the drive / switching circuit 20 drives the drive motor 19 in response to a control drive signal from the controller 11 based on the up / down signal as an operation signal of the up / down switch.
Then, the window glass 18 is raised or lowered.

In the vicinity of the drive motor 19, a pulse sensor 22 is provided. The pulse sensor 22 is connected to the controller 11 via an input circuit 23, and outputs a pulse signal (hereinafter, simply referred to as “pulse”) to the controller 11 according to the driving (rotation) of the driving motor 19. ing. Then, based on the length of the pulse period proportional to the rotation speed of the drive motor 19, the controller 11 detects that the window glass 18 has been caught.

A limit switch 24 is connected to the controller 11 via an input circuit 25. When the window glass 18 reaches a fully closed position or a fully opened position within the movable range, the limit switch 24 is turned on, and an ON signal is output to the controller 11. Further, a control signal is output from the controller 11 to the drive / switching circuit 20 based on the ON signal, and the drive of the drive motor 19 is stopped.

The controller 11 is connected via an input circuit 27 to a vehicle speed sensor 26 as vehicle environment parameter detecting means and running state detecting means. The vehicle speed sensor 26 detects the running state of the vehicle and outputs a detection signal corresponding to the vehicle speed to the controller 11. The running state of the vehicle corresponds to a vehicle environment parameter.

The door 17 has a door switch 2 as a vehicle environment parameter detecting means and a door state detecting means.
The door switch 28 is connected to the controller 11 via an input circuit 29. The door switch 28 is turned off when the door is open and turned on when the door is closed. The open / closed state of the door corresponds to a vehicle environment parameter.

Next, a process for detecting pinch in this embodiment will be described. In the present embodiment, a pulse detection method is used as the pinch prevention function, and the pulse sensor 2
2 and is based on a pulse signal having a period proportional to the rotation speed of the drive motor 19. That is, in general, when the rotation speed of the motor 19 is high, the pulse period is short, and when the rotation speed is low, the pulse period is long, and the fluctuation of the pulse period is used. In this embodiment, the pulse cycle corresponds to data corresponding to the rotation of the motor.

More specifically, when the drive motor 19 is operating to close the window glass 18 at a constant rotational speed, the pulse period output at each time is constant. Then, the pulse period T0 of the currently output actual pulse and the pulse periods T1 to TN-1 of each pulse up to N-1 before the currently output pulse are summed up,
Divide the sum by N. That is, the average pulse period P0 (=
[T0 + T1 +... + TN-1] / N). Then, if the pulse period is always constant, the average pulse period P0
Is also constant.

Then, a value obtained by multiplying the average pulse period P0 obtained at each time by a predetermined threshold coefficient A is obtained as a threshold value P0S (= A * P0). This threshold value P0S is a reference value for determining the presence or absence of pinching at each time. The threshold coefficient A related to the threshold value POS is stored in the EEPROM of the storage unit 13.

Then, the pulse period T0 obtained at that time is compared with the threshold value P0S. As a result, when the actual pulse period T0 is larger than the threshold value P0S, (T0>
When P0S, that is, P0S-T0 <0), the arithmetic unit 12 determines that something is caught, and sends a control signal to the drive / switching circuit 20 so as to stop or reverse the window glass 18 (operation in the opening direction). Is output. Conversely, the actual pulse period T0 at that time is equal to or less than the threshold value P0S (T0≤P0S, that is, P0S
When −T0 ≧ 0), the operation unit 12 determines that nothing is sandwiched.

Therefore, the pinch detection by the arithmetic unit 12 is as follows.
This is performed by comparing a pulse based on the current rotation speed with a pulse based on the rotation speed obtained from a predetermined range in the past to the present.

Next, along with the process of detecting pinch, learning control of the pinch prevention function in this embodiment, that is, the threshold P
The process of determining the update of 0S will be described with reference to the flowchart shown in FIG. This flowchart shows the processing executed by the calculation unit 12.

This flowchart starts when an up signal or a down signal is input. That is, when a down signal as an operation signal is input from the power window switch 15 to the controller 11, the controller 11 outputs a control drive signal to the drive / switching circuit 20. Then, the drive / switch circuit 20 drives the drive motor 19 based on the signal to lower the window glass 18 (step (hereinafter abbreviated as “S”) 101). Then, based on the rotational drive of the drive motor 19, the pulse sensor 22 generates a pulse having a cycle proportional to the rotational speed,
Output to the controller 11. As a result, the controller 11 starts acquiring a pulse period, which is data for comparison with the threshold value P0S (S102).

In step S103, the above-described pinch detection process (including the calculation of the average pulse period P0) is performed.
In the processing after 3, so-called learning control for updating the threshold value as needed is started. That is, in S103, first, as a process of the pinch detection, the threshold value P0S and the pulse period T
Compare the magnitude relationship with 0. More specifically, the calculation unit 12
Reads the threshold coefficient A stored in the EEPROM of the storage unit 13. Thereafter, the threshold value P0S is calculated by multiplying the threshold coefficient A by the average pulse period P0, and it is determined whether or not a value obtained by subtracting the pulse period T0 from the threshold value P0S is smaller than 0 (the pinch detection is performed). ). If the pulse period T0 exceeds the threshold value P0S, (P0S-T0 <
0, S103 is YES), and the process proceeds to S104. Then, a control signal is output to the drive / switching circuit 20 to stop or reverse the window glass 18 (operation to open).

On the other hand, in S103, the pulse period T0
Does not exceed the threshold value P0S (P0S−T0 ≧
0, S103 is NO), and the process proceeds to S105. Then, the calculation unit 12 determines whether or not the difference value between the pulse period T0 of the current pulse and the threshold value P0S exceeds the allowable change amount Trth. The allowable change amount Trth is used to determine the update of the threshold value P0S (that is, the threshold coefficient A) in order to cope with a temporal change of the vehicle when the vehicle is stopped and the door 17 is closed. Is determined from the experimental value.
The allowable change amount Trth is stored in the ROM of the storage unit 13 in advance.
Is stored in

In S105, the difference value is equal to the allowable change amount T.
rth (P0S-T0> Trth, that is, S1
If 05 (YES), the process proceeds to S106. On the other hand, the S
In 105, the difference value does not exceed the allowable change amount Trth (P0S-T0 ≦ Trth, that is, NO in S105).
In this case, the process proceeds to S110.

In S106, the calculation unit 12 determines whether the vehicle is stopped when the pulse is input. That is, the traveling state is determined based on a detection signal (hereinafter, referred to as a vehicle speed signal) input from the vehicle speed sensor 26 to the controller 11. Then, calculation is performed based on the vehicle speed signal from the vehicle speed sensor 26, and when it is determined that the vehicle speed is 0, that is, when the vehicle is stopped (YES in S106),
Proceed to S107.

In step S107, the arithmetic unit 12 determines whether or not the door 17 provided with the window glass 18 is closed when the pulse is input. If it is determined that the door switch 28 is ON, that is, if the door 17 is closed (YES in S107), S108 is performed.
Proceed to. Then, in S108, the RA
M temporarily stores the current pulse period T0 as a new threshold value, and then proceeds to S110.

Here, in S106, a calculation is performed based on the vehicle speed signal from the vehicle speed sensor 26, and if the vehicle speed is other than 0 (NO in S106), that is, if it is determined that the vehicle is running, If it is determined in S107 that the door signal from the door switch 28 is OFF, that is, if the door 17 is not closed (NO in S107), the process proceeds to S109. In S109, information that the vehicle is running or the door is open based on a signal from the vehicle speed sensor 26 or the door switch 28 is temporarily stored in the RAM of the storage unit 13 as state change information, and S110 Proceed to.

Then, in S110, the arithmetic section 12 determines whether or not the closing operation of the window glass 18 has been completed. That is, it is determined whether or not the ON signal from the limit switch 24 has been input to the controller 11. When the ON signal from the limit switch 24 is confirmed and it is determined that the closing operation of the window glass 18 has been completed (S1).
10 is YES), the process proceeds to S111.

On the other hand, when the ON signal from the limit switch 23 is not input, that is, when the window glass 1
8 is not completed (S110 is N)
O), and return to S102.

In S111, the arithmetic unit 12 stores the new threshold data (ie, the pulse period T0) in the RAM of the storage unit 13.
It is determined whether or not is stored. If it is determined that the new threshold data (pulse period T0) is stored in the RAM (S111: YES), the process proceeds to S112, where it is determined whether or not there is a change in the state of the vehicle during the closing operation of the window glass 18. judge. That is, the RA of the storage unit 13
Based on a signal from the vehicle speed sensor 26 or the door switch 28, it is determined whether or not the state change information indicating that the vehicle is running or the door is opened is stored in M.

If it is determined in step S112 that the state change information indicating that the vehicle is running or the door is open is not stored in the RAM, that is, if it is determined that there is no state change during the closing operation of the window glass 18 (S112). Is YES),
Proceed to S113. Then, in S113, the current pulse period T0 temporarily stored in the RAM is updated as a new threshold value P0S. Then, a threshold coefficient A (= T0 / P0) relating to the new threshold value P0S is calculated, and this value is written in the EEPROM of the storage unit 13, thereby updating the threshold coefficient A, and this flowchart ends. In the present embodiment, S113 corresponds to a threshold update process.

In step S112, when the RAM stores the state change information indicating that the vehicle is running or the door is open, that is, if it is determined that the state has changed during the closing operation of the window glass 18, the process proceeds to step S112. NO), and proceed to S114. Then, the new threshold data (pulse period T0) stored in the RAM is discarded, and this flowchart ends.

On the other hand, in S111, the RAM
If it is determined that the data of the new threshold value (pulse period T0) is not stored (NO in S111), the flowchart ends.

Therefore, the update of the threshold value P0S (threshold coefficient A) is performed only when the vehicle is stopped and the door 17 is closed while the window glass 18 is closing. When the vehicle is running during the closing operation of the window glass 18, or when the door 17 is opened even when the vehicle is stopped, the data of the new threshold value (the current pulse period T0) is stored in the RAM. ) Is not stored and the threshold value P0S
(Threshold coefficient A) is not updated.

Furthermore, when the vehicle stops and runs or vice versa and the door closes and opens or vice versa during the closing operation of the window glass 18, state change information is stored in the RAM. Therefore, even if the data of the new threshold (the current pulse period T0) is stored in the RAM, the threshold is not updated with the data.

In this embodiment, while the window glass 18 is closing, the vehicle 1 is stopped and the door 1 is closed.
The state where 7 is in the closed state corresponds to the predetermined condition. Therefore, according to the above embodiment, the following effects can be obtained.

(1) In the above-described embodiment, when the window glass 18 is closed, the pinch determination is performed with the highest priority, and the arithmetic unit 12 determines the vehicle speed signal and the door signal from the vehicle speed sensor 26 and the door switch 28. It is determined whether or not the current situation of the vehicle is in a state suitable for updating the threshold value P0S based on. During the closing operation of the window glass 18, only when the vehicle is stopped and the door 17 is in the closed state, the threshold value P0S is set after the closing operation of the window glass 18 is completed.
(Threshold coefficient A) is updated. For this reason, the update of the threshold value P0S (threshold coefficient A), which is performed only when a certain condition is satisfied, is accurately performed in accordance with the temporal change of the vehicle. Therefore, unlike the related art, when the pinch is detected by the window glass 18, a malfunction due to the update of the erroneous threshold value P0S (threshold coefficient A) does not occur, and high-precision pinch detection can be realized.

(2) In the above embodiment, while the vehicle is running, the pulse period T0 for the pinch determination is compared with the threshold value P0S, while the new threshold value (the pulse period T0) for updating the threshold value is updated. Is not stored in the RAM. As a result, after the closing operation of the window glass 18 is completed, the threshold value P0S
The (threshold coefficient A) is not updated. Therefore,
The threshold value is not updated while the vehicle is running and abnormal data (pulse period T0) is most easily detected.

(3) Even when the vehicle is stopped, if the door 17 is not closed, the new threshold value (pulse period T0) for updating the threshold value is not stored in the RAM, and the threshold value P0S
(Threshold coefficient A) is not updated. So, for example,
The threshold is not updated at the time of opening the door 17 where abnormal data is easily detected.

(4) In the above embodiment, the vehicle speed sensor 26
And the door switch 28 detect the vehicle condition when the window glass 18 is closed, and based on the detection result, the calculation unit 12 determines whether or not the threshold P0S (threshold coefficient A) is updated, that is, the storage determination, that is, Then, it is determined whether the state change information or the new threshold is stored in the RAM. Therefore, the threshold value P0S (threshold coefficient A) is determined by the vehicle speed sensor 26 and the door switch 28.
Can be easily updated.

(5) In the above embodiment, the determination of storage in the RAM from which the threshold value P0S (threshold coefficient A) is updated is performed based on the detection results from both the vehicle speed sensor 26 and the door switch 28. Was. Therefore, for example, the threshold value can be updated by the detection of the vehicle speed sensor 26 as compared with a case where the door state when the window glass 18 is closed by the door switch 28 is detected and the determination is made based on the door state. Since the state is narrowed down, accurate threshold updating can be performed.

(6) In the above embodiment, the state change information is stored in the RAM, and the final judgment of the threshold update is performed after the closing operation of the window glass 18 is completed. For this reason, even if there is a closed state of the door 17 and a stopped state of the vehicle during the closing operation of the window glass 18, and an open state and a running state of the door 17, the closed state of the door 17 and the stopped state of the vehicle Even if the new threshold value is stored in the RAM during that time, the data is not updated as the new threshold value. That is,
For example, the threshold is not updated in a situation where an impact may occur due to opening and closing of the door 17 where abnormal data is easily detected, or in a situation such as when the vehicle starts. (Second Embodiment) FIGS. 4 and 5 show a second embodiment of the present invention.
It will be described based on.

In the second embodiment, the same or corresponding components as those of the above-described embodiment are denoted by the same reference numerals and description thereof is omitted. Further, in the present embodiment, the difference from the first embodiment is the number of thresholds for determining the presence / absence of pinching.

First, the processing of the pinch detection in this embodiment will be described. In the present embodiment, the threshold for determining the presence or absence of pinching at each time is a stopped / door-closed threshold P0S1 and a stopped / door-opened threshold P0S2.
, And a running threshold value P0S3. That is,
The threshold coefficients related to the thresholds P0S1, P0S2, and P0S3 correspond to the three thresholds P0S1, P0S2, and P0S3 described above.
The threshold coefficient A1 for stopping / door closing, the threshold coefficient A2 for stopping / door opening, and the threshold coefficient A3 for traveling have different values. Each of the threshold coefficients A1 to A3 is stored in the EEPROM of the storage unit 13. The stopped / door closed threshold value P0S1, the stopped / door open threshold value P0S2, and the traveling threshold value P0S3 correspond to the situation response threshold values.

When the pinch detection is performed, the thresholds P0S1, P0S2, P0S3 (= A1 * P0) are determined in accordance with the pulse period T0 obtained at that time and the situation at that time.
, A2 * P0, A1 * P0).
The pulse period T0 at that time is determined by the threshold value P0S1,
When it is larger than P0S2, P0S3 (T0> P0S1, P0S
2, P0S3), the arithmetic unit 12 determines that something is caught, and outputs a control signal to the drive / switching circuit 20 so as to stop or reverse the window glass 18 (operation in the opening direction). Conversely, the pulse period T0 at that time
Is less than or equal to thresholds P0S1, P0S2, P0S3 (T0 ≦ P0S1,
0S2, P0S3), the operation unit 12 determines that nothing is sandwiched.

Next, along with the process of detecting pinch,
4 and 5 show learning control of the pinch prevention function executed by
This will be described according to the flowchart shown in FIG. This flowchart shows the processing executed by the calculation unit 12.

When the closing operation of the window glass 18 is started (S101), in the present embodiment, first, the state of the vehicle is stored (S211). That is, the window glass 18
The running state and the opening / closing state of the door 17 when the vehicle starts to close are stored in the RAM of the storage unit 13 based on signals detected from the vehicle speed sensor 26 and the door switch 28.

When the controller 11 starts detecting the pulse period (S102), it is determined in S106 whether or not the vehicle is stopped when the pulse is input. At this time, the controller 11 is
The determination is made based on the vehicle speed signal input to.

Calculation is performed based on the vehicle speed signal from the vehicle speed sensor 26. If the vehicle speed is 0, that is, if it is determined that the vehicle is stopped (S106 is YES), the flow proceeds to S107.
Next, in S107, it is determined whether the door 17 provided with the window glass 18 is in a closed state. That is,
It is determined whether the door switch 28 is on.

Then, the door switch 28 is turned on.
That is, if it is determined that the door 17 is closed (S
107 is YES), the pinch detection processing of S212 is performed.
That is, in S212, the EEPRO
The stopped / door-closed threshold coefficient A1 stored in M is read. Then, the threshold coefficient A1 and the average pulse period P
The threshold value P0S1 at the time of stop / door closing is calculated from 0, and the magnitude relation between the threshold value P0S1 of the stop / door close time and the pulse period T0 of the current pulse is compared as a process of pinching detection. The pulse period T0 is a threshold value P0S when the vehicle is stopped and the door is closed.
If it exceeds 1, (P0S1-T0 <0, YES in S212), the process proceeds to S104. Then, in S104, a control signal is output to the drive / switching circuit 20, and the window glass 18 is stopped or reversed (opening operation).

On the other hand, in S212, the pulse period T0
Does not exceed the stopped / door-closed threshold value P0S1 (P0S1−T0 ≧ 0, NO in S212), and proceeds to S213. In S213, the threshold value P0S1 when the vehicle is stopped and the door is closed
It is determined whether or not the difference between the current pulse and the pulse period T0 of the current pulse exceeds the first allowable change amount Trth1. The first allowable change amount Trth1 is a constant for determining whether the threshold value P0S1 (that is, the threshold value coefficient A1) is to be updated in order to cope with a temporal change of the vehicle when the vehicle is stopped and the door is closed. Is stored in the ROM of the storage unit 13 in advance.

The difference value exceeds the first allowable change amount Trth1 (P0S1−T0> Trth1, that is, S213
If YES), the process proceeds to S108. In addition, S21
In 3, if the difference value does not exceed the first allowable change amount Trth1 (P0S1−T0 ≦ Trth1, that is, NO in S213), the process proceeds to S110.

If the door signal from the door switch 28 is off in S107, that is, if the door 17 is open (S107: NO), the pinch detection processing of S214 is performed. That is, the EEPRO of the storage unit 13
The stopped / door-opened threshold coefficient A2 stored in M is read. Then, the threshold coefficient A2 and the average pulse period P
The threshold value P0S2 during stop / door opening is calculated from 0 and compared with the pulse period T0 of the current pulse. The pulse period T
If 0 exceeds the stopped / door open threshold value P0S2 (P0S2-T0 <0, S214 is YES), the process proceeds to S104. On the other hand, in S214, if the pulse period T0 has not exceeded the parked / door open threshold value P0S2,
0S2−T0 ≧ 0, S214: NO), and proceed to S215.

In S215, it is determined whether or not the difference between the stopped / door open threshold value P0S2 and the pulse cycle T0 of the current pulse exceeds the second allowable change amount Trth2. The second allowable change amount Trth2 is set to a threshold value P0S2 (that is, a threshold coefficient A) in order to cope with a temporal change of the vehicle when the vehicle is stopped and the door is opened.
A constant for determining the update in 2), which is stored in the ROM of the storage unit 13 in advance.

The difference value exceeds the second allowable change amount Trth2 (P0S2−T0> Trth2, that is, S215 is Y
If ES), the process proceeds to S108. In S215, the difference value does not exceed the second allowable change amount Trth2 (P0S2-T0 ≤ Trth2, that is, if S215 is N
O) In case of, proceed to S110.

In S106, when the vehicle speed signal from the vehicle speed sensor 26 indicates that the vehicle speed is other than 0, that is, when it is determined that the vehicle is running, a sandwiching detection process in S216 is performed. That is, the running threshold coefficient A3 stored in the EEPROM of the storage unit 13 is read. Next, based on the threshold coefficient A3 and the average pulse period P0, the driving threshold P is calculated.
0S3 is calculated and compared with the pulse period T0 of the current pulse. If the pulse period T0 exceeds the running threshold value P0S3 (P0S3-T0 <0, S216 is YES),
Proceed to S104. On the other hand, in S216, if the pulse period T0 has not exceeded the threshold value P0S3 for running (P0S3-T0 ≥ 0, S216 is NO), the process proceeds to S217.

Then, in S217, it is determined whether or not the difference between the current traveling threshold value P0S3 and the pulse period T0 of the pulse exceeds the third allowable change amount Trth3. Note that the third allowable change amount Trth3 is set to a threshold value P0S3 in order to correspond to a temporal change of the vehicle during traveling.
(I.e., a constant for determining the update of the threshold coefficient A3), which is stored in the ROM of the storage unit 13 in advance.

The difference value exceeds the third allowable change amount Trth3 (P0S3−T0> Trth3, that is, S217
If YES), the process proceeds to S108. In addition, S21
In step 7, if the difference value does not exceed the third allowable change amount Trth3 (P0S3-T0 ≤ Trth3), step S11 is performed.
Go to 0.

S213, S214, S215 to S10
At step 8, the current pulse period T0 is temporarily stored in the RAM of the storage unit 13 as the new threshold values P0S1 to P0S3 when the vehicle is stopped, when the door is closed, when the vehicle is stopped, when the door is open, or when the vehicle is running, and the process proceeds to S110. .

S108, S213, S214, S215
In S110, it is determined whether the closing operation of the window glass 18 has been completed based on the ON / OFF signal from the limit switch 24. If it is determined that the closing operation of the window glass 18 has been completed (S110: YES), the process proceeds to S112, and if it is determined that the closing operation has not been completed (S110: NO), the process proceeds to S112.
The process returns to step S102, and the process from step S102 is performed.

In S112, the window glass 18
Then, it is determined whether or not the current running state in which the closing operation has been completed and the open / closed state of the door 17 have changed compared to when the window glass 18 started to close. That is, the operation unit 12
Determines the current state of the vehicle based on signals from the vehicle speed sensor 26 and the door switch 28, and compares it with the vehicle state stored in the RAM in advance in S211.

In S112, when it is determined that there is no change in the state of the vehicle (S112: YES), the flow proceeds to S113. Then, the new threshold value (pulse period T0) stored in the RAM is appropriately changed to the new threshold value P for each vehicle state.
Update as 0S1 to P0S3.

That is, when the state of the vehicle is stopped and the door is closed, the stopped and door closed threshold coefficient A1 (= T0 / P0) relating to the new threshold value P0S1 is calculated.
The threshold coefficient A1 is updated by writing to the PROM. If the state of the vehicle is stopped or the door is open, the stop / door open threshold coefficient A2 (= T0 / P0) related to the new threshold value P0S2 is calculated.
By writing to the OM, the threshold coefficient A2 is updated. If the state of the vehicle is traveling, a threshold coefficient A3 for traveling (= T0 / P0) relating to the new threshold value P0S3 is calculated, and the threshold coefficient A3 is written in the EEPROM of the storage unit 13. Update. Then, this flowchart ends.

On the other hand, if the calculation unit 12 determines in S112 that there is a change in the vehicle condition (S112
O), proceed to S114. Then, the new threshold value (pulse period T0) stored in the RAM is discarded, and this flowchart ends. In other words, the window glass 18
State of the vehicle (running state, door open / closed state) during the closing operation of
Is changed, the threshold is not updated.

As a result, each of the thresholds P0S1, P0S2, P
The update of 0S3 (threshold counts A1 to A3) is based on the assumption that the state of the vehicle does not change during the closing operation of the window glass 18, and the pulse period T0 of the input pulse.
And threshold values P0S1, P0S2,
This is performed by comparing P0S3 with P0S3.

Therefore, according to the present embodiment, the following effects can be obtained. (1) In the above-described second embodiment, when the window glass 18 is closed, the pinch determination is performed with the highest priority, and the calculation unit 12 performs the determination based on the detection signal and the door signal from the vehicle speed sensor 26 and the door switch 28. In order to update the threshold value, the pulse period T0 and the threshold values P0S1 and P0
0S2 and P0S3 are compared. Then, the difference between the threshold value P0S1, P0S2, and P0S3 according to the situation at that time exceeds the corresponding allowable change amount Trth1 to Trth3, and the state of the vehicle is changed while the window glass 18 is closed. If there is no change, the thresholds P0S1, P0S2,
P0S3 (threshold coefficients A1 to A3) is updated. For this reason,
Threshold value P0S1 determined by comparing with threshold values P0S1, P0S2, P0S3 (threshold coefficients A1 to A3) according to the state of the vehicle
, P0S2, P0S3 (threshold coefficients A1 to A3)
Done exactly. Therefore, the same effect as the effect (1) of the first embodiment can be obtained.

(2) In the second embodiment, since a plurality of thresholds P0S1, P0S2, and P0S3 for judging pinch detection are set, the threshold value is set higher according to the vehicle environment as compared with the case where one threshold value is set. Accurate pinch detection can be realized.

(3) In the second embodiment, the situation for updating the threshold is determined based on both the vehicle speed sensor 26 and the door switch 28. Therefore, for example, as compared with the case where only the door switch 28 is provided and the comparison update is performed only with the threshold value according to the opening / closing state of the door 17, the traveling of the vehicle whose data value is likely to change depending on the traveling or stopping of the vehicle Since the change due to the state is also taken into account, the threshold value can be updated more accurately.

(4) In the second embodiment, the determination of the vehicle state for updating the respective thresholds P0S1, P0S2, P0S3 (threshold coefficients A1 to A3) is easily realized by the vehicle speed sensor 26 and the door switch 28. it can.

(5) In the second embodiment, the first to third permissible change amounts Trth1 to Trth3, which are used as criteria for determining whether or not the pulse period T0 is set to the new threshold value, depend on each state, that is, Since the thresholds P0S1, P0S2, and P0S3 are set according to the thresholds, the arithmetic unit 12 can make an accurate determination.

(6) In the second embodiment, the state of the vehicle (running state and door opening / closing state) is stored in the RAM before starting the closing operation of the window glass 18, and the RA is stored.
By comparing the information stored in M with the information on the state of the vehicle at the end of closing, the new threshold value is finally set to EEPRO.
It is determined whether or not to rewrite to M. So, for example,
When the state of the vehicle changes, such as when the vehicle changes from the running state to the stopped state during the operation of the window glass 18 and abnormal data is easily detected, the data is not updated as the new threshold value.

The above embodiments may be modified as follows. In the second embodiment, the pulse period T0 is set to the new threshold value P0S
The allowable change amounts Trth1 to Trth3 for determining whether to update as 1, P0S2, and P0S3 are set according to the respective threshold values P0S1, P0S2, and P0S3, as shown in FIGS. 5 and 6. , The common allowable change amount Trt
Assuming that h0 = Trth1 = Trth2 = Trth3, 1
Only one may be set. In this case, S21
If the calculation unit 12 determines that the pulse period T0 does not exceed the threshold values P0S1, P0S2, and P0S3 in 2, S214, and S216, the process proceeds to S218, where the difference value exceeds the common allowable change amount Trth0. Is determined.
Even in this case, it is possible to accurately update the thresholds P0S1, P0S2, and P0S3.

Also, assuming that each of the threshold values P0S1 to P0S3 is a common threshold value POS4 = P0S1 = P0S2 = P0S3, only one is set, and only the first to third allowable change amounts Trth1 to Trth3 are set to values corresponding to each situation. May be.

In the first and second embodiments, the detection of the vehicle condition when the window glass 18 is closed is determined as follows.
Although it was performed only by the vehicle speed sensor 26 and the door switch 28,
In addition, a battery voltage detection circuit for detecting a battery voltage, a temperature sensor for detecting a temperature outside the vehicle, an acceleration sensor for detecting an acceleration applied to the vehicle, and the like, are provided. It may be detected.

As described above, when the battery voltage detection circuit, the temperature sensor, and the acceleration sensor are added, in the first embodiment, between S107 and S108, if the detection result from the circuit or the sensor is a predetermined condition. A determination process of whether or not to perform the determination is added. In the second embodiment, S107
Between step S212 and step S212, a process of determining whether or not the detection result from the circuit or the sensor is a predetermined situation is added. Further, in the second embodiment, a situation correspondence threshold value adapted to each predetermined situation is set.

For example, when a battery voltage detection circuit is provided, the rotation speed of the motor 19 increases when the battery voltage is high, such as a new battery serving as the power supply for the motor 19, and when the battery voltage is low, Can cope with a situation change in which the rotation speed of the motor 19 becomes slow.

When a temperature sensor is provided, when the temperature is lowered in a cold district or in winter, the situation in which the rotation speed of the motor 19 decreases due to a decrease in the battery voltage must be taken. Can be. Further, when a temperature sensor is further provided, the glass run provided on the window frame or the like of the door 17 is hardened when the temperature drops in a cold region or in winter, and the frictional force acting between the window glasses 18 is increased. And the rotation of the motor 19 changes as compared with an environment where the temperature is high.

Further, when an acceleration sensor is provided,
It is possible to cope with a situation in which the rotation speed of the motor 19 changes under a situation in which vertical acceleration such as vibration is applied.

In this way, the window glass 18
Can be finely classified when the is opened and closed, and more accurate threshold update is possible. The battery voltage detection circuit, the temperature sensor, and the acceleration sensor correspond to a battery voltage detection unit, a temperature detection unit, and an acceleration detection unit, respectively.

In the first and second embodiments, the comparison and determination processing of the threshold value P0S is performed based on the pulse signal input from the pulse sensor 22 to the controller 11.
The threshold value comparison / determination process may be performed based on a current signal of a motor current supplied to the drive motor 19.

In the first and second embodiments, the present invention is embodied in a power window device for a side door of a vehicle. However, the present invention is embodied in a slide roof device including an electric slide roof provided on a ceiling surface of a vehicle. You may. Even in this case, the present invention can be effectively used for a slide roof in which foreign matter can be pinched. In this case, the slide roof corresponds to a window glass.

In the first embodiment, in S106, the arithmetic unit 12 determines whether the vehicle is stopped or running on the basis of the detection result from the vehicle speed sensor 26. The process proceeds to step S109 so that the data is not updated.
06 may be changed as follows. That is, for example, only when a change in the state of the vehicle from the stop state to the running state is confirmed, the process proceeds to S109. If it is determined that there is no change in state, in other words, control is performed so as to proceed to S107 while the vehicle is stopped or traveling on a place where there is no road surface change such as an asphalt road. Even in this case, the comparison and update of the threshold value P0S is performed in a situation where the vehicle is stable, and can be accurately performed. It is preferable to use an acceleration sensor rather than the vehicle speed sensor 17 to detect a state change in the running state of the vehicle, and the acceleration sensor corresponds to a running state detecting unit.

In the first embodiment, in S107, it is detected whether or not the door 17 is closed, and the process proceeds to S108 only when the door 17 is closed. A timer for measuring or resetting the elapsed time based on the control signal from the controller may be provided and controlled as follows. That is, the timer starts counting at the same time as the input of the ON or OFF signal of the door switch 28. If the time t1 of the timer 14 is t1 <T (predetermined time), immediately after the door 17 is completely closed, or , The arithmetic unit 12 determines that it is immediately after the start of opening. On the other hand, when the counted time t1 of the timer 14 is t1 = 0, the door 17 is in a stable closed state (a state not after the closing operation but after the closing operation) or a stable open state (the opening operation). (The state after the opening operation, not inside). Then, when the counting of the predetermined time T is continued, the timer 1
Reset 4 As a result, in S107, it is determined by the timer whether or not the opening / closing operation has just started or has just finished, and if the door 17 is in the stable closed state or the stable open state, the process proceeds to S108. In this way, when the door 17 is stable in the closed state or the open state, the comparison and update of the threshold value POS can be performed accurately.

A door opening / closing operation sensor for detecting the opening / closing operation of the door 17 may be provided so that the threshold is not updated during this opening / closing operation (during opening / closing). For example,
An example of the opening / closing operation sensor is an angle sensor that detects an opening / closing angle of a door. Then, the arithmetic unit 12 of the controller 11 differentiates the angle detected by the sensor from time to time, calculates the angular velocity, and determines that the angular velocity is other than 0 as open / close operation (open / close). Even in this case, when the door 17 is in a stable state in the closed state or the open state, the comparison and update of the threshold value P0S can be accurately performed. In this case, the door opening / closing operation sensor corresponds to the door state detecting means and the vehicle environment parameter detecting means.

In the first embodiment, the difference value comparison processing (S105) between the pulse period T0 and the threshold value P0S is
107, that is, after the determination of the open / closed state of the door 17 may be provided. Even in this case, there is no problem in the threshold update processing.

In the first embodiment, the state change of the vehicle is stored in S109, and it is determined whether or not to update the threshold value based on the state change information (S112). Without providing, R
If the new threshold value is stored in the AM, the process may proceed to S113 and the threshold coefficient A may be updated.

In the first and second embodiments, the threshold value P
0S, threshold coefficients A, A1 to A3 related to P0S1 to P0S3
Although the rewriting of the EPROM is regarded as the threshold updating process, the thresholds POS, P0S1 to P0S3 are made constants,
The threshold updating process may be performed by rewriting S, P0S1 to P0S3 themselves into EEPROM.

Next, regarding technical ideas other than the invention described in the claims that can be grasped from the above-described embodiment and each example,
These effects are described below. (1) The apparatus for detecting the presence or absence of a window glass according to claim 2 or 3, wherein the allowable change amount is set to be equal to the number of situation-related thresholds. In this case, the threshold value can be accurately compared and determined by setting the allowable change amount according to each situation-specific threshold value.

[0103]

As described above in detail, according to the first aspect of the present invention, when learning control for updating a threshold value is performed, the vehicle includes a running state when the window glass is opened and closed. If the predetermined condition is not satisfied based on the determination result of the vehicle environment parameter, the threshold update process is not performed, so that the threshold can be updated accurately, and highly accurate pinch detection can be realized.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, when a running state of a vehicle in which abnormal data is easily detected is detected by a vehicle environment parameter,
Since the threshold updating process is not performed by the determination updating unit, a malfunction due to an incorrect threshold being updated does not occur.

According to the third aspect of the present invention, when learning control for updating the threshold value is performed, based on the determination of the vehicle environment parameters of the vehicle including the running state of the vehicle when the window glass is opened and closed. Since the data corresponding to the rotation of the motor is compared with the situation correspondence threshold value corresponding to the state of the vehicle, the threshold value can be updated accurately, and the pinch detection with high accuracy can be realized.

Further, since a plurality of thresholds are set as the situation-response thresholds, more accurate pinch detection can be realized according to the vehicle environment. According to the fourth aspect of the present invention, in addition to the effects of the first aspect of the present invention, in addition to the effect of the first aspect, the detection of the vehicle environment parameter when the window glass is opened and closed includes the door state detecting means, the battery voltage Since at least one of the detection unit and the temperature detection unit and the acceleration detection unit are further included, the situation when the window glass is opened and closed can be finely detected, and the threshold value can be updated more accurately.

According to the fifth aspect of the present invention, in addition to the effect of any one of the first to fourth aspects, data at the time of a state change in which abnormal data is easily detected is updated as a new threshold value. Since no error occurs, no malfunction occurs due to the update of an incorrect threshold.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of a power window device according to a first embodiment.

FIG. 2 is a schematic diagram showing a door of the vehicle.

FIG. 3 is a flowchart showing a pinch detection and threshold value update process.

FIG. 4 is a flowchart illustrating a pinch detection and threshold update process according to the second embodiment;

FIG. 5 is a flowchart showing a pinch detection and threshold value update process.

FIG. 6 is a flowchart showing a pinch detection and threshold update process according to another embodiment.

[Explanation of symbols]

11: controller (drive control means, judgment updating means, state change detecting means), 15: power window switch (window switch), 18: window glass, 1
9: drive motor (motor), 20: drive / switching circuit (drive circuit), 26: vehicle speed sensor (vehicle environment parameter detecting means, running state detecting means), 28 door switch (vehicle environment parameter detecting means, door state detecting means) ).

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E052 AA09 BA02 CA06 EA14 EA15 EB01 GA00 GA03 GA08 GA09 GA10 GB00 GB06 GB12 GB13 GB20 GC06 GD00 GD03 GD09 HA01 KA12 KA13 LA06 LA08 3D127 AA02 BB01 CB01 CC05 DF03 DF35 DF35

Claims (5)

[Claims] 1. A drive control means having a pinch prevention function of stopping or reversely driving a motor for driving a window glass when the pinch by the window glass occurs.
A determination update unit that compares and determines data corresponding to the rotation of the motor and a threshold for determining the presence / absence of pinching, and when the difference exceeds an allowable change amount, performs a threshold update process of updating the threshold. The apparatus for detecting the presence or absence of pinching of a window glass, comprising: vehicle environment parameter detecting means including at least running state detecting means for detecting a running state of the vehicle when the window glass opens and closes. If the conditions are not met,
An apparatus for detecting the presence / absence of pinching of a window glass, wherein the determination update unit does not perform a threshold update process. 2. The method according to claim 1, wherein the predetermined condition in the running state of the vehicle is whether or not the vehicle is stopped, and when the vehicle is running, the determination updating unit does not perform the threshold updating process. 2. The apparatus for detecting the presence or absence of a window glass according to claim 1. 3. A drive control means having a pinch prevention function of stopping or reversing the drive of a motor driving the window glass when the pinch by the window glass occurs,
A determination update unit that compares and determines data corresponding to the rotation of the motor and a threshold for determining the presence / absence of pinching, and when the difference exceeds an allowable change amount, performs a threshold update process of updating the threshold. A vehicle environment parameter detecting means including at least a running state detecting means for detecting a running state of the vehicle when the window glass opens and closes, and the threshold value is a vehicle environment parameter detection. A plurality of situation response thresholds corresponding to the detection results detected by the means are set, and the determination update means determines, based on the detection result of the vehicle environment parameter detection means, data corresponding to the rotation of the motor and a situation response threshold. An apparatus for detecting the presence or absence of pinching of a window glass, wherein the apparatus is configured to compare and determine any one of them. 4. The vehicle environment parameter detecting means includes a door state detecting means for detecting an open / close state of a door, a battery voltage detecting means for detecting a battery voltage, and a temperature detecting means for detecting an external temperature condition. 4. The apparatus according to claim 1, further comprising at least one of an acceleration detecting means for detecting an acceleration applied to the vehicle. 5. The vehicle according to claim 1, further comprising: a state change detecting unit configured to determine whether there is a state change related to the vehicle based on the vehicle environment parameter during the operation of the window glass, wherein the state change detecting unit detects a state change related to the vehicle. 5. The apparatus according to claim 1, wherein the determination update unit does not perform the threshold update process when the determination is made. 6.