CN102798407B - Position adjustable sensor with multiple magnets in the housing - Google Patents

Abstract

The sensor with adjustable positions of multiple magnetic blocks in the casing of the present invention belongs to the technology of providing control signals by multi-point magnetic induction. It includes sensing elements, booster model processors, digital-to-analog converters, and operational amplifiers connected in sequence. The sensing elements include rotating disks and fixed disks. There are permanent magnets and Halls in the inner space embedded in the rotating disk. A plurality of permanent magnet blocks distributed in a ring can adjust the distance between the permanent magnet blocks, and the magnetic polarities of adjacent permanent magnet blocks are opposite, that is, the magnetic polarity distribution mode of all permanent magnet blocks on a certain surface of the rotating disk is N pole, S pole, N pole...; the Hall on the fixed disk is located close to the permanent magnet block. Advantages: The polarity is distributed in NS, so that Hall can obtain a rectangular wave signal, which can be added to the digital processing for setting the booster model; by adjusting the distance between the permanent magnet blocks, the rectangular wave signal can represent the position of the permanent magnet block on the rotating disk Position, to determine the use of different rectangular waves, the relative position of the permanent magnet block and Hall is fixed, and the signal output is reliable.

Description

Position adjustable sensor with multiple magnets in the housing

technical field

The invention belongs to the technical field of providing signals by magnetic induction, and in particular relates to the technology of providing control signals by multi-point magnetic induction on a rotating component.

Background technique

The Chinese patent 201020295192.0 "Claw Type Torque Sensing Device" applied by Yebao Vehicle Material Industry (Kunshan) Co., Ltd. discloses a sensing device for power-assisted bicycles. The sensing device includes a magnetic part and an elastic part to sense the torque. sensing device. After a long time of use, the change of the elastic coefficient of the elastic member will lead to changes in the sensing signal and the control effect of the controlled motor, and the power-assisted effect will not match the power-assisted needs of people. Moreover, the design structure of the elastic member is complex and the manufacturing cost is high.

The Chinese patent 01201843.0 "Automatic Detection Device for Electric Power-assisted Bicycles" applied by Beijing University of Science and Technology discloses an automatic detection device for electric power-assisted bicycles, which detects pedaling force, speed and steering without contact. There is a spring on the inner disc, and the inner and outer discs are reset by a spring, and the two Halls on the bracket are used to measure the electrical signals generated by the relative moving magnetic discs on the inner and outer discs to indicate pedaling force, speed and steering. .

Disadvantages (1) The use of elastic parts is not durable: after a long time of use, the change of the elastic coefficient of the elastic parts will lead to changes in the sensing signal and the control effect of the controlled motor, and the power-assisted effect will not match the human power-assisted needs. Complicated and costly.

Disadvantage (2) Each disk group is the same and the magnetic poles are set in the same way, but it cannot express the respective positions of different disk groups, and cannot express the special power-assisted requirements of different positions: from Figure 3, 4, 5, 6 of the 01201843.0 patent and the instruction manual The record in the second paragraph of page 2 shows that the magnetic pole setting method of each magnetic sheet group (including a magnetic sheet 4, a magnetic sheet 5, and a magnetic sheet 6) is the same, that is, only the different positions of the inner wheel are simply changed from If the same set of disks is set repeatedly, the respective positions of different sets of disks cannot be represented, and the motion state of a specific position cannot be represented. When a person rides a bicycle, the pedals and the positions corresponding to the pedals are in motion and have their own Special boosting requirements, but the same structure of each magnetic sheet group in this patent cannot express the special boosting requirements of different positions on the pedal.

Disadvantage (3) There is no difference in the signals of each point, so that the man-machine does not cooperate: every disk group is the same, so each disk group cannot indicate the position of the disk group on the inner wheel, and the signal output by Hall cannot express The positions of the pedals and other magnetic disc groups, that is, the signal output by the Hall cannot indicate the demand for power assistance at different pedal positions, resulting in a mismatch between the demand for power assistance and the time for providing power assistance, that is, the unsatisfactory man-machine cooperation.

Disadvantage (4) The output of sine wave makes the edge distance of the disk group not less than 4 cm, generally 5 cm is better, and the number of disk groups that can be set is too small, and the man-machine cooperation is not ideal: if the disk groups are the same, the Huo What I output is a sine wave as the control signal. As the control signal, the sine wave must have a certain peak-to-valley difference. Since the magnetic disk set of this patent needs a certain length to indicate forward and reverse movement, the rotating disc in the circular groove with a diameter of 20 cm There are at most 8 magnetic disk groups on the circular track, generally 5 is better, so that the Hall can have a sine wave signal with control function. That is to say, the technical solution of the 01201843.0 patent is used for power-assisted bicycles, the number of magnetic disc groups is limited to less than 8, the control signals are too few, and the man-machine cooperation is not ideal. However, if there are more than 8 magnetic disc groups, when a person pedals faster, the signal pattern output by Hall is close to a horizontal line. This signal has no control function, and cannot control the motor, so that it loses the power assist function when it is particularly needed.

Disadvantage (5) The blind area of the signal is up to 45 degrees, and you can't get it when you need it when you start it: As we all know, the torque of the bicycle pedal is the smallest at the apex, and the 10-45 degrees away from the apex is the area that needs the most assistance. , but the included angle between the magnetic sheet groups in this patent is 45 degrees, and there is no magnetic sheet group in the area where the pedal is 10-45 degrees away from the apex, and there is no control signal. The result is when the power is most needed , but the motor of the power-assisted bicycle does not assist.

In short, in addition to the use of elastic parts that are not durable and have a complex structure, due to the structural characteristics of the Hall and the disk group, the size and diameter of the turntable are within 20 cm, which limits the number of disk groups to 8 groups, and the number of disk groups cannot be increased arbitrarily. , so that the human-machine cooperation is not ideal, and there is no assistance when starting, the assistance demand does not match the assistance provided, and the rider's comfort is poor; if the number of magnetic disk groups is forcibly increased, the sensor signal loses the assistance control function.

Wang Naikang's Chinese patent 03264387.X "Time-Type Electric Power-assisted Bicycle Sensor" discloses that no elastic parts are used, only two moving and fixed turntables are used. element, the bicycle pedal makes one revolution, each Hall generates two pulses, and three Hall elements generate six pulses. There are three characteristics and four disadvantages as follows:

Features (1) In order to obtain six pulse signals, the same magnetic poles of the permanent magnets can only be on one side: each Hall needs to generate two pulses, and the same magnetic poles of the two permanent magnets can only be set on the moving side. On the same side of the disc, that is, on a certain side of the moving disc, the two permanent magnets are all north poles or both are all south poles. If on the same side of the moving plate, one permanent magnet is the North Pole and the other is the South Pole, then each Hall can only generate one pulse when the pedal rotates once, and three Halls have only three pulses, which is not Conform to the description of this patent specification. In order to increase the number of pulses and improve the control effect, the same magnetic poles of the permanent magnets can only be on one side.

Features (2) The permanent magnetic steel is used to indicate the fixed position of the pedal, and the three Halls indicate the moving position of the pedal: since the pedal and the moving plate rotate synchronously, one of the two positions on the moving plate corresponding to the two pedals is respectively fixed. Permanent magnetic steel, where a certain pedal is turned, the corresponding permanent magnetic steel is also turned at that position; but only when it is turned at a position with a Hall, can a control signal be sent through the Hall to direct the motor of the power-assisted bicycle to generate Assisted rotation required.

Features (3) Because one Hall cannot represent the position of the pedal movement in different periods of a revolution, it is not possible to use only one Hall: the pedal has a very different demand for power assistance during different periods of a revolution, and it must be reflected For this change in power assist demand, the patent uses three Halls to be set at three positions within an angle of 180 degrees, two permanent magnetic steels are set at two pedal positions, and the pedal is turned at the position where there is a Hall. Hall just outputs a signal to indicate that the pedal has reached the position of the Huo Yuan. However, the use of multiple Halls has the following disadvantages.

These features as a power-assisted bicycle sensor have three disadvantages:

Disadvantages (1) Using two permanent magnets with no difference to represent the fixed positions of the two pedals, only multiple Halls can be used to represent the rotational positions of the pedals: the two permanent magnets have no difference, and the advantages It is possible to indicate the fixed position of the two pedals regardless of the left and right feet, so that the left and right feet can generate power assistance requirements, which can produce the same motor power assistance effect; but the disadvantage is that the permanent magnet itself cannot indicate the rotation position of the pedals, but only Multiple Halls can be set at different corner positions to indicate the rotational position of the pedal, so one Hall cannot be used, but multiple Halls must be used.

Disadvantage (2) You can’t use only one Hall, but three Halls will inevitably cause the original segmentation error of the three control signals, which will distort the power-assisted demand model, and naturally produce power-assisted output inconsistent with the power-assisted demand: whether the power-assisted bicycle is one or two For a motor, the sensing signal for controlling the motor can only be achieved by inputting a sensing signal into the motor controller to achieve the purpose of controlling the motor; while the patent uses three Halls to control the motor, it is necessary to use the three Halls of the three Halls to control the motor. The signals are combined into one combined control signal before being input to the motor controller. The sensing parameters of the three Halls cannot be the same, especially due to changes in ambient temperature and long-term use, the sensing parameters of the three Halls may vary greatly. The output voltages are different, resulting in different power output of the motor, and the power output is inconsistent with the power demand; similarly, when the power demand is the same, the outputs of different Halls may be the same voltage, resulting in the same power output of the motor, and also There is a problem that the power output is inconsistent with the power demand.

Disadvantage (3) The combined control signal is prone to signal drift, which makes the combined control signal not match the motor controller, and the power-assisted demand model is distorted: due to changes in ambient temperature and long-term use, the sensing parameters of the three Halls may vary greatly , the connection points of the three control signals of the three Halls must change, then the combined control signals generated by the same boost demand will produce segmental signal drift, and the combined control signals will produce signal distortion as a whole, that is, the power boost demand model distortion , causing the motor controller to choose any one of the three control signals as a reference will cause the problem that the power output is inconsistent with the power demand.

Disadvantage (4) The sensing points cannot be increased arbitrarily. If there are too few sensing points, the motor will not run smoothly, making the rider feel very uncomfortable: due to the disadvantages (1) and (2) are the most important The number of halls is greater than one. Obviously, the more the number of halls, the more serious the shortcomings (1) and (2) are. Therefore, the power-assisted bicycle provided by this patent can only be a very bad power-assisted bicycle that makes the rider feel comfortable.

Disadvantage (5) The blind area of the signal is up to 42 degrees, and you can't get it when you need it when you start it: As we all know, the torque of the bicycle pedal is the smallest at the apex, and the 10-45 degrees away from the apex is the area that needs the most assistance. , but the included angle between the Halls in this patent is 42.5-43.5 degrees. There is no Hall in the area where the pedal is 10-42 degrees away from the apex, and there is no control signal. The result is when the power is most needed , but the motor of the power-assisted bicycle does not assist.

In short, this patent is a technical solution for using multiple Halls to control the booster mode, because only multiple Halls can be used to represent the rotation position of the pedal, and the multiple control signals of multiple Halls must have original errors, and the combined control signals It is also easy to produce signal drift, which can cause distortion of the assist demand model, that is, the same assist demand at different times, but different assist effects; the more the number of Halls, the more serious the distortion of the assist demand model, limiting the number of Halls , a small amount of Hall will cause the motor to run unsteadily, which makes the rider feel very uncomfortable, and cannot get assistance when starting. To make it undistorted to help the demand model, and to ensure the smooth operation of the motor, there is always a trade-off between these two issues, and it is impossible to have both.

Contents of the invention

The purpose of the present invention is to provide only one Hall and the unequal distance between the permanent magnet blocks on the annular groove rotating disk to obtain speed and position signals, and digitally process the signals to become a sensor with the best power-assisted model signal output, It is a kind of sensor that can increase the number of permanent magnet blocks as much as possible in the Hall sensing area, make maximum use of the displacement information of the circular groove rotating disk, output more information and accurately locate, and can adjust the output signal model, Hall and multiple permanent magnets The block secures the relative position of the sensor with an assembly. When used on a power-assisted bicycle, the power-assisted bicycle sensor can make the power-assist demand and the provided power match well without elastic parts and other mechanical torque determination, and the motor runs smoothly.

The concept of the present invention is: within the range that can be felt by a Hall, a plurality of permanent magnet blocks are used to alternately change the magnetic polarity of the south and north on the side of the Hall in an annular groove, so that one Hall can sense it. Motion signals of all permanent magnet blocks. The change mode of multiple permanent magnet blocks is mainly magnetic polarity change, dislocation change, and the position can be adjusted by the user. More permanent magnet movement signals.

The magnetic polarity of multiple permanent magnet blocks is alternately changed by the south pole and the north pole, so that the signal generated by Hall is a rectangular wave, with stronger control function and more quantity;

The dislocation changes of multiple permanent magnet blocks make the signals generated by Hall have different inter-wave distances, which can express the motion position of the permanent magnet blocks more accurately, so that the motion state of a specific position can be expressed. For power-assisted bicycles, the specific position of the pedals can be expressed The motion state of the position is very important, because the motion state of the pedal directly expresses the state of the person's power assistance demand for the car;

The position of the permanent magnet block can be adjusted by the user, so that the signal generated by Hall can be adjusted by the user, and the user can adjust the control mode and control content through the user adjustment control signal, and has the function of controlling in a personalized way.

A mechanical structure assembly is used to fix the relative position of the sensing element Hall and multiple permanent magnet blocks, so that the sensing signal is stable and reliable.

Turn the rectangular wave signal output by Hall into a digital signal, so that the digital signal of Hall can be digitally processed. In the process of digital processing, a power-assisted mathematical model that can best cooperate with man-machine function can be added. The power-assisted mathematical model can be adjusted according to human The machine can be adjusted at will. It overcomes the difficulty of digitizing the sine wave signal output by Hall Hall in the prior art, and can only perform analog signal processing without adding a booster model that can be adjusted at will. Problems that prevent man-machine from working together optimally.

The structure of the present invention is as follows:

A sensor with adjustable positions of multiple magnetic blocks in the housing, including a sensor element connected in sequence, a booster model processor 21, a digital-to-analog converter 27 and an operational amplifier 28; it is characterized in that:

[1] The sensing element is an element that converts the rotational motion of the annular groove rotating disk 1 into a rectangular wave signal output;

The sensing element comprises an annular groove rotating disk 1, an annular groove fixed disk 40, a Hall 3 and a plurality of permanent magnet blocks 2, the concave surfaces of the annular groove rotating disk 1 and the annular groove fixed disk 40 are opposite, and the ring The groove fixed disk 40 is embedded in the annular groove of the annular groove rotating disk 1 to form an embedded hollow shell in which two disks can rotate relative to each other. The concave surfaces of the two disks are sandwiched into a hollow ring 41; The annular groove rotating disk 1 at position 41 is fixed with a plurality of permanent magnet blocks 2, and the plurality of permanent magnet blocks 2 are distributed within the range of a circular ring 6, and the inner circular trajectory line 5-1 of the circular ring 6 There is at least one circular trajectory line running through all the permanent magnet blocks 2 between the outer circular trajectory line 5-2; the inner circular trajectory line 5-1 and the outer circular trajectory line 5-2 are concentric circles, and there are at least two The permanent magnet block 2 has a dislocation distribution; the dislocation distribution is a certain type of radial dislocation distribution or pitch dislocation distribution; or a combination of both radial dislocation distribution and spacing dislocation distribution;

Radius dislocation distribution mode is: at least two permanent magnet blocks 2 have different distances from the center of the circle where the inner circular trajectory line 5-1 is located;

The spacing dislocation distribution method is: the distance between adjacent permanent magnet blocks 2 is the permanent magnet block spacing 7; at least two permanent magnet block spacing 7 are different in length;

There is at least one bar-shaped short groove 8 between the inner circular trajectory line 5-1 and the outer circular trajectory line 5-2, and a permanent magnet block 2 is arranged in the bar-shaped short groove 8, and the permanent magnet block 2 can be fixed on the bar. Any position in the short groove 8;

The magnetic polarities of adjacent permanent magnet blocks 2 are opposite, and the magnetic polarity distribution mode of all permanent magnet blocks 2 on the annular groove rotating disk 1 is N pole, S pole, N pole, S pole, N pole, S pole...;

A Hall 3 is fixedly arranged on the annular groove fixed disk 40 of the hollow ring 41, and the Hall 3 is located at a position close to the permanent magnet block 2 and can feel the magnetic flux of each permanent magnet block 2, and the Hall 3 and the permanent magnet block There is a gap between 2; Hall 3 is a Hall that produces a rectangular wave output signal for the opposite magnetic polarity.

[2] The booster model processor 21 is a signal form converter that converts the digital signal rotated by the annular groove rotating disk 1 into a digital signal of the booster model;

The booster model processor 21 includes an analog-to-digital conversion and wave width identifier 22, a booster starting point selector 23, a magnet speed calculator 24, a booster model memory 25 and a booster model calculator 26;

The analog-to-digital conversion and wave width recognizer 22 is connected to the sensing element, and the analog-to-digital conversion and wave width recognizer 22 recognizes the width of each rectangular wave from the rectangular wave signal input by Hall 3 in the sensing element, and converts each rectangular wave signal Change into different digital signals, mark each rectangular wave, and the analog-to-digital conversion and wave width recognizer 22 outputs the magnetic block motion digital signal marked with the position order of the magnetic block;

Analog-to-digital conversion and wave width recognizer 22 are respectively connected with power-assisted starting point selector 23 and magnetic block speed calculator 24, and power-assisted starting point selector 23 is connected with magnetic block speed calculator 24; Magnetic block speed calculator 24 uses analog-to-digital conversion and The wave width recognizer 22 inputs the magnetic block movement digital signal marked with the position order of the magnetic block to calculate the rotational speed of the annular groove rotating disk 1, and transmits the rotational speed digital signal of the annular groove rotating disk 1 to the power assist starting point selector 23, The power assist starting point selector 23 uses the magnetic block movement digital signal marked with the magnetic block position order and the rotational speed digital signal of the annular groove rotating disk 1 to determine a certain rectangular wave corresponding to the power assist starting point under a certain rotational speed condition. , that is, to determine the magnetic block of the starting point of the power assist;

The power-assisted starting point selector 23 and the magnetic block rotating speed calculator 24 are all connected with the power-assisted model calculator 26 respectively, and the power-assisted model memory 25 is also connected with the power-assisted model calculator 26; block, and use the two conditions of the annular groove rotating disk 1 rotating speed of the magnetic block rotating speed calculator 24 to select a certain type of power-assisted model function in the power-assisted model memory 25, and the starting point magnetic block and the annular groove rotating disk 1 rotating speed These two conditions are substituted into the booster model function, and the booster model digital signal suitable for these two conditions is calculated, that is, the booster model calculator 26 outputs the booster model digital signal;

[3] The digital-to-analog converter 27 converts the digital signal of the booster model into an analog signal of the booster model;

The booster model calculator 26 is connected to the digital-to-analog converter 27, and the digital-to-analog converter 27 converts the booster model digital signal of the booster model calculator 26 into a booster model analog signal;

[4] The operational amplifier 28 converts the booster model analog signal from the digital-to-analog converter 27 into a booster model analog signal in the rated voltage range.

[1] Description of the sensing element:

The annular groove rotating disc 1 is fitted with the annular groove fixed disc 40, and can rotate relatively, which ensures that the induction positions of the Hall 3 and all permanent magnet blocks 2 do not change in the rotating state of the annular groove rotating disc 1, so that The output signal of Hall 3 is only related to the rotation of all permanent magnet blocks 2, and has nothing to do with the objects below the annular groove rotating disk 1 and the annular groove fixed disk 40; if the annular groove rotating disk 1 and the annular groove fixed disk 40 is made of metal material, which can have a shielding effect, so Hall 3 and all permanent magnet blocks 2 are placed in hollow ring 41 for induction with annular groove rotating disk 1 and annular groove fixed disk 40, which improves Hall 3 The reliability and authenticity of the signal.

When the annular groove fixed disk 40 is fixed on a certain object, the annular groove rotating disk 1 is rotated, and each permanent magnet block 2 on the annular groove rotating disk 1 sweeps the Hall 3 on the annular groove fixed disk 40 , each permanent magnet block 2 can make the Hall 3 generate an electric signal. Since the magnetic polarities of adjacent permanent magnet blocks 2 are opposite, that is, the magnetic polarities of all permanent magnet blocks 2 face Hall 3 alternately from south to north, the electrical signal generated by Hall 3 is a rectangular wave signal, which is convenient for digitization Signal processing for digital control. In the prior art, all the permanent magnet blocks 2 face the Hall 3 with the same magnetic polarity, and the Hall 3 can only generate a sine wave signal, so it can only be used for analog control; once the induction parameters of the Hall 3 change, the analog Control can be distorted. However, the present invention uses a rectangular wave signal to realize digital control, and the problem of control distortion will not occur.

The annular groove rotating disc 1 can be a material plate that is not easily deformed such as a plastic plate, a high-strength insulating plate, a copper plate, and an aluminum plate. When using the sensor element, the annular groove rotating disk 1 will rotate, so the annular groove rotating disk 1 is also called the rotating disk, and the center of rotation is the center of the circle where the plurality of permanent magnet blocks 2 are distributed in a circular shape.

A plurality of permanent magnet blocks 2 are distributed in a circular shape within the range of the circular ring 6. The purpose of the distribution is that only one Hall 3 can be used to feel the motion state of all the permanent magnet blocks 2 on the ring groove rotating disk, that is, to feel the ring groove The movement position and speed of all permanent magnet blocks 2 on the rotating disk, as well as the change of speed, or acceleration, this Hall 3 can express the motion state of permanent magnet block 2 with a continuous electrical signal, and because all The permanent magnet blocks 2 are respectively fixed on the circular groove rotating disk, that is, the circular groove rotating disk 1, and the continuous electrical signal generated by the Hall 3 can express the motion state of the circular groove rotating disk. If this continuous electrical signal is used to control other objects, this continuous electrical signal is a control signal. If it is used to control the motor of a power-assisted bicycle, it is also necessary to use a single-chip microcomputer or other electronic components as a sensor signal processor to convert the position, speed, and acceleration in the control signal into a power-assisted signal of how much power is needed. The conversion function is the power-assisted Demand model, or assistance model.

The meaning of dislocation distribution of multiple permanent magnet blocks 2 is: the electrical signal generated by Hall 3 is not exactly the same pulse signal, but a pulse signal with different pulse width, and the permanent magnet block 2 is distinguished by a different pulse signal. different positions, so that the motion state of the permanent magnet block 2 at different positions can be obtained. It can accurately express a certain position of the circular groove rotating disk, or the motion state of each permanent magnet block 2 . If it is used for power-assisted bicycles, it can accurately express the needs of the pedals for power assistance at different positions, so that the expression of power-assisted needs can be more precise, and the cooperation between the car and the person will be more consistent.

The radial dislocation distribution mode of the permanent magnet blocks 2 is: some permanent magnet blocks 2 are close to the rotation center of the annular groove rotating disk, and some permanent magnet blocks 2 are far away from the rotation center of the annular groove rotating disk. But regardless of the distance, the permanent magnet block 2 must be within the range that the Hall 3 can sense and generate electrical signals. The range where electric signals can be generated is the range between the inner circular trajectory line 5-1 and the outer circular trajectory line 5-2. In order to ensure that the Hall 3 can generate electrical signals, it is structurally required that at least one circular trajectory line runs through all the permanent magnet blocks 2 between the inner circular trajectory line 5-1 and the outer circular trajectory line 5-2. At least two permanent magnet blocks 2 have different distances from the center of the circle where the inner circular locus line 5-1 is located. Of course, the distances from each permanent magnet block 2 to the center of the circle are different, that is, the radius of each permanent magnet block 2 Not the same, so that each pulse of the Hall 3 electric signal can be expressed in the permanent magnet block 2, so that each pulse can indicate the position of an annular groove rotating disk.

The dislocation distribution mode of the permanent magnet block 2 spacing is: with the outer edge of the permanent magnet block 2 as the basis for measuring the spacing, there are at least two permanent magnet block spacings 7 of different lengths, and of course the length of each permanent magnet block spacing 7 is different. The same, so that each pulse of the Hall 3 electric signal can be expressed on the permanent magnet block 2, so that each pulse can indicate the position of an annular groove rotating disk.

There are two ways to obtain the dislocation distribution of the permanent magnet blocks 2. The first method is when the permanent magnet blocks 2 are fixed on the circular groove rotating disk 1, there are at least two permanent magnet blocks 2 in a dislocation distribution. The second is to utilize a plurality of positions in the bar-shaped short groove 8 to be provided with permanent magnet blocks 2, and to use at least one bar-shaped short groove 8 on the annular groove rotating disk 1 to place one or more permanent magnet blocks 2 Be located in the strip-shaped short groove 8, can change the position of permanent magnet block 2 at any time according to people's needs, just adjust the position in the bar-shaped short groove 8 of permanent magnet block 2, fix it after adjustment, so, there is The shape short slot 8 can adjust the dislocation distribution mode of the permanent magnet block 2 at any time, and the same permanent magnet block 2 can be used to make the Hall 3 produce different output signals and produce different control effects. If used for assisting bicycles, the bicycle can be given different assisting effects for different people.

The Hall 3 is located close to the permanent magnet 2 and can feel the magnetic flux of the permanent magnet 2. The purpose is to use the Hall 3 to feel the motion state of the permanent magnet 2, thereby feeling the motion state of the annular groove rotating disk 1, that is, the motion position, velocity, acceleration.

The opposite magnetic polarity of adjacent permanent magnet blocks 2 is a very important technical feature, and the magnetic polarity distribution mode of all permanent magnet blocks 2 is N pole, S pole, N pole, S pole, N pole, S pole..., so that Huo Er 3 outputs high and low alternating rectangular wave signals, because as a circular groove rotating disk whose size is limited, it will obtain as many accurate change signals as possible for one revolution, and it should certainly select rectangular waves for use. The change time of the peak-to-valley value of the rectangular wave signal is short, which can generate as many control-significant signals as possible within a certain period of time. The structure with the opposite magnetic polarity of the adjacent permanent magnet blocks 2 produces a rectangular wave, while the structure with the same magnetic polarity of the adjacent permanent magnet blocks 2 produces a sine wave, especially when used for power-assisted bicycles, as the ring groove of the sensing component rotates The disk is generally limited to a diameter of 10-15 cm. In this limited range, a signal with a control function is obtained. After one revolution, the number of pulses generated by a rectangular wave is 7-9 times greater than that of a sine wave. Naturally, the opposite structure of the magnetic polarity of the adjacent permanent magnet block 2 has a better control effect on the power-assisted bicycle, the cooperation between the person and the bicycle is better, and the rider feels more comfortable.

[2] Description of the booster model processor 21: the booster model processor 21 is a signal form converter that converts the digital signal rotated by the annular groove rotating disk 1 into a digital signal of the booster model;

The booster model processor 21 includes an analog-to-digital conversion and wave width identifier 22, a booster starting point selector 23, a magnetic block rotational speed calculator 24, a booster model memory 25 and a booster model calculator 26; the processing ideas of these components to signals are: The rectangular wave signal of Hall 3 in the sensing element is decomposed into the position digital signal representing the position of the magnetic block 2, and the speed digital signal representing the rotational speed of the annular groove rotating disk 1. Since the position and speed are both digital signals, the position can be calculated The speed and speed are processed with the boost mathematical model, and the boost mathematical model can be designed according to the best feeling of people, so that the boost model digital signal output by the boost model processor 21 has the best boost mathematical model, and the start of the boost mathematical model point and end point, because there is a digital signal of the position of the magnetic block 2, so the start point and end point are accurate enough to be fully synchronized with the power assistance demand of the person. It solves the problem that there is no position signal of the magnetic block 2 in the existing technology, which leads to the mismatch between the power-assist demand of people and the power-assisted model, and the operation of the power-assisted model is delayed compared with the power-assisted demand. Force, small force and strong force, no force and strong force, etc. The problem of man-machine mismatch. The connection relationship and the function of each part in the booster model processor 21 are as follows:

The analog-to-digital conversion and wave width recognizer 22 is connected to the sensing element, and the analog-to-digital conversion and wave width recognizer 22 recognizes the width of each rectangular wave from the rectangular wave signal input by Hall 3 in the sensing element, and converts each rectangular wave signal Change into different digital signals, mark each rectangular wave, and the analog-to-digital conversion and wave width identifier 22 outputs a rectangular wave signal marked with the position order of the magnetic block. In this way, the rectangular wave signal with different waveform lengths is changed into a rectangular wave signal marked with data, which is convenient for converting the length of the rectangular wave into rectangular wave position data for calculation and processing in the subsequent digitization process. Therefore, the analog-to-digital conversion and wave width identifier 22 is a processor that converts the signal whose rectangular wave length represents the position of the magnetic block into a digital signal that marks the position of the magnetic block with data. This is an important invention point that the present invention is different from existing power-assisted bicycles. With the digital signal marking the position of the magnetic block with data, the present invention can find a certain or each magnetic block on the circular groove rotating disk 1 of circular circular motion. The position of the block finds the starting point and end point for the motor 30 to start generating power, increase power, reduce power, stop power, etc., so that people's power needs can be matched with the power behavior of the motor 30, which avoids the difficulty of existing power-assisted bicycles. Man-machine cooperation, motor 30 does not rotate when needing boosting occurs, and motor 30 also keeps moving and cannot stop when needing boosting, even causes the problem of collision accident.

Analog-to-digital conversion and wave width recognizer 22 are respectively connected with power-assisted starting point selector 23 and magnetic block speed calculator 24, and power-assisted starting point selector 23 is connected with magnetic block speed calculator 24; Magnetic block speed calculator 24 uses analog-to-digital conversion and The wave width recognizer 22 inputs the magnetic block movement digital signal marked with the position order of the magnetic block to calculate the rotational speed of the annular groove rotating disk 1, and transmits the rotational speed digital signal of the annular groove rotating disk 1 to the power assist starting point selector 23, The power assist starting point selector 23 uses the magnetic block movement digital signal marked with the magnetic block position order and the rotational speed digital signal of the annular groove rotating disk 1 to determine a certain rectangular wave corresponding to the power assist starting point under a certain rotational speed condition. , that is to determine the magnetic block of the starting point of the power assist. Because the determined boost starting point magnetic block is a rectangular wave marked with data, then the boost starting point magnetic block has a unique corresponding magnetic block 2 position, so that the boost starting point selector 23 has completed finding the magnetic block 2 position of the boost starting point, It is also possible to determine the position of a certain magnetic block 2 to start or end the motor to perform some kind of power-assisted model motion. This achieves the synchronous movement of the specific magnetic block 2 of the annular groove rotating disk 1 controlled by the human, and the specific magnetic block 2 controls the motor 30 to perform specific synchronous rotation, so as to realize the purpose of synchronous control of the motor by humans, and there will be no inaccurate starting point and end point of control. , there will be no problem of delay in the start and end of the control. However, the existing power-assisted bicycles cannot find the starting and stopping positions synchronized with people when starting and stopping the booster, so the starting and ending points of the control are delayed.

The power-assisted starting point selector 23 and the magnetic block rotating speed calculator 24 are all connected with the power-assisted model calculator 26 respectively, and the power-assisted model memory 25 is also connected with the power-assisted model calculator 26; block, and use the two conditions of the annular groove rotating disk 1 rotating speed of the magnetic block rotating speed calculator 24 to select a certain type of power-assisted model function in the power-assisted model memory 25, and the starting point magnetic block and the annular groove rotating disk 1 rotating speed These two conditions are substituted into the booster model function to calculate a booster model digital signal suitable for these two conditions, that is, the booster model calculator 26 can output the booster model digital signal.

[3] Explanation of the digital-to-analog converter 27: the digital-to-analog converter 27 converts the digital signal of the booster model into an analog signal of the booster model.

The booster model calculator 26 is connected to a digital-to-analog converter 27, and the digital-to-analog converter 27 converts the booster model digital signal of the booster model calculator 26 into a booster model analog signal. In order to output the analog signal of the booster model to the motor controller 29 which can only process analog signals.

[4] Description of the operational amplifier 28: the operational amplifier 28 converts the analog signal of the booster model from the digital-to-analog converter 27 into an analog signal of the booster model in the rated voltage range.

The digital-to-analog converter 27 is connected with the operational amplifier 28. Although the booster model analog signal of the digital-to-analog converter 27 solves the problem of the booster model, the voltage of the booster model signal can not meet the needs of the motor controller 29, so an operational amplifier is also used 28 converts the analog signal of the booster model into the analog signal of the booster model required by the rated voltage range, and then transmits it to the motor controller 29 .

The signal output by each signal processing component in the sensor of the present invention is:

Hall 3 outputs a rectangular wave signal;

The booster model processor 21 outputs a digital signal of the booster model;

The analog-to-digital conversion and wave width identifier 22 outputs a magnetic block movement digital signal marked with the position order of the magnetic block;

The power-assisted starting point selector 23 outputs the determined starting point position signal of the power-assisted starting point magnetic block;

The magnetic block rotational speed calculator 24 calculates and outputs the rotational speed digital signal of the annular groove rotating disk 1;

The booster model memory 25 stores a variety of booster model functions for backup, and outputs the digital signal of the selected booster model function;

The booster model calculator 26 calculates and outputs the booster model digital signal to be used for the control function;

The digital-to-analog converter 27 outputs the analog signal of the booster model converted from the digital signal of the booster model;

The operational amplifier 28 outputs the analog signal of the booster model into a rated voltage range of the booster model analog signal;

The thermistor R6 ensures that the output of the operational amplifier 28 is the analog signal of the booster model in the rated voltage range, that is, the analog signal of the standard booster model.

In order to solve the drift problem of the analog signal of the booster model, a thermistor R6 is provided, and the thermistor R6 is connected between the input terminal and the output terminal of the operational amplifier 28 .

Hall 3, digital-to-analog converter 27 and operational amplifier 28 are all semiconductor devices, and have the function of processing analog signals, so it is easy to cause signal parameters to drift with temperature changes, especially in summer and winter, and power-assisted bicycles are all outdoors. The effect of signal parameter drift caused by temperature changes is obvious. Therefore, it is best to correct the signal drift of the signal output by the operational amplifier 28 to obtain a standard booster model analog signal that is not affected by temperature changes, and pass the standard booster model analog signal through the motor controller 29. By controlling the operation of the motor 30, the person riding a power-assisted bicycle will not feel the problem that the power-assisted effect is different in summer and winter.

The booster model processor 21 is a single-chip microcomputer 31 , and a clock circuit 32 is connected to the single-chip microcomputer 31 . A single-chip microcomputer 31 is used to complete the analog-to-digital conversion and the functions of the wave width identifier 22 , the power-assisted starting point selector 23 , the magnetic block rotational speed calculator 24 , the power-assisted model memory 25 and the power-assisted model calculator 26 . The clock signal of the clock circuit 32 is used to distinguish the rectangular wave signal input by the Hall 3 , and preferably the length of each clock signal is 0.001 second.

The structural relationship between the mechanical parts of the sensor and the sensing parts: the mechanical parts of the sensor include the annular groove rotating disk 1 and the fitted annular groove fixed disk 40, and the sensing parts of the sensor include a plurality of permanent magnet blocks 2, Hall 3 , single-chip microcomputer 31, digital-to-analog converter 27 and operational amplifier 28; Hall 3, single-chip microcomputer 31, digital-to-analog converter 27 and operational amplifier 28 four electronic components connected successively in the sensing part are located on a circuit board 59; A plurality of permanent magnet blocks 2 are fixed on the inner wall of the annular groove rotating disc 1 of the hollow ring 41, and a fixed circuit board 59 is fixed on the inner wall of the annular groove fixed disc 40 of the hollow ring 41, and the Hall 3 on the circuit board 59 is located at a position capable of sensing the permanent magnet The magnetic flux of the block 2, and the Hall 3 can output and change the position of the electric signal according to the change of the magnetic flux. The sensing part is the sensing functional part of the sensor; the mechanical part has two functions, the first is to fix the relative position of each element in the sensing part, so that each element can form a sensing functional whole, and the second is to put The whole sensing function is fixed on the electric bicycle, and the whole sensing function can sense the motion state of the electric bicycle. The Hall 3, the single-chip microcomputer 31, the digital-to-analog converter 27 and the operational amplifier 28 four electronic components that are connected in turn are arranged on a circuit board 59, which is beneficial to the integration, modularization and miniaturization of these four electronic components, and facilitates these four electronic components. The four electronic components are integrally fixed on the inner wall of the annular groove fixing plate 40 of the hollow ring 41, which simplifies the process of manufacturing the sensor.

The preferred model of each part of the sensor of the present invention and the specific connection mode are: Hall 3 is UGN3075, the power-assisted model processor 21 is AT89S52 single-chip microcomputer 31, and digital-to-analog converter 27 is ADC-C8E; Operational amplifier 28 is OF-17F, OF The thermistor R6 is connected between the input terminal 2 pin and the output terminal 6 pin of the -17F operational amplifier 28; the connection relationship of each part is as follows:

Connect pin 3 of signal output end of Hall 3 to pin 12 of MCU 31 INTO [P32];

The 39 pins P00 of the single-chip microcomputer 31 connect the 12 pins B8 of the digital-to-analog converter 27;

The 38-pin P01 of the single-chip microcomputer 31 is connected to the 11-pin B7 of the digital-to-analog converter 27;

The 37 pins P02 of the single-chip microcomputer 31 are connected to the 10 pins B6 of the digital-to-analog converter 27;

The 36-pin P03 of the single-chip microcomputer 31 is connected to the 9-pin B5 of the digital-to-analog converter 27;

The 35 pins P04 of the single-chip microcomputer 31 connect the 8 pins B4 of the digital-to-analog converter 27;

The 34-pin P05 of the single-chip microcomputer 31 is connected to the 7-pin B3 of the digital-to-analog converter 27;

The 33 pins P06 of the single-chip microcomputer 31 are connected to the 6 pins B2 of the digital-to-analog converter 27;

The 32 pins P07 of the microcontroller 31 are connected to the 5 pins B1 of the digital-to-analog converter 27;

The 4 pins of the digital-to-analog converter 27 are connected to the 2 pins of the operational amplifier 28;

The 2 pins of the digital-to-analog converter 27 are connected to the 3 pins of the operational amplifier 28;

Pin 6 of the operational amplifier 28 is an analog signal output terminal.

A thermistor R6 is connected between the input terminal 2 pin and the output terminal 6 pin of the OF-17F operational amplifier 28, and a capacitor C6 is connected in parallel at both ends of the thermistor R6. Preferably, the thermistor R6 is 5K, the capacitor C6 is 8P, and the 1.25k R5 is grounded between pin 4 of the digital-to-analog converter 27 and pin 2 of the operational amplifier 28 . The thermistor R6 can be used to adjust the voltage range of the analog signal output by the 286 pin of the operational amplifier to be stable between 0.8--4.2V.

The length of at least one pitch 7 of permanent magnet blocks is not equal to any other pitch 7 of permanent magnet blocks. The strip-shaped short groove 8 is a structure for adjusting and fixing the permanent magnet block 2 at different positions. By adjusting the position of the permanent magnet block 2 , it can be realized that the length of at least one permanent magnet block interval 7 is not equal to any other permanent magnet block interval 7 . Not equal to other lengths, that is, the permanent magnet block spacing 7 of a special length can be used to indicate the position of the bicycle pedal. Preferably, the length of at least two permanent magnet block spacing 7 is not equal to any other permanent magnet block spacing 7, and the permanent magnet block spacing 7 of these two special lengths corresponds to two pedals respectively, which is used to represent the two pedals of the bicycle. position of the pedals. Because of the circular motion of the bicycle pedals, it is very important to determine the position of the pedals to obtain the speed of this circular motion and determine the assist model for the next circular motion.

A bearing 42 is provided between the outer surface of the inner ring of the annular groove fixed disk 40 and the inner surface of the inner ring of the annular groove rotating disk 1 . The bearing 42 keeps good relative rotation between the annular groove fixed disk 40 and the annular groove rotating disk 1 for a long time.

The bar-shaped short groove 8 is an arc-shaped structure, and the arc-shaped circle of the bar-shaped short groove 8 is concentric with the inner circular locus 5-1. This structure enables the output signal generated by Hall 3 to change the length of the peak or trough. It can be used for 1. The changed peak or trough length is used as a start signal to make the controlled object start another set of working procedures. If it is used for power-assisted bicycles, the position of the permanent magnet block 2 in the bar-shaped short slot 8 can be changed to change the power-assisted model, such as the power-assisted model for villains, the power-assisted model for women, the power-assisted model for young people, the power-assisted model for sports, Leisure booster models, etc. It can be used for 2. The changed peak or trough length is only used to change the control effect of this peak or trough. If it is used for assisting bicycles, only the boosting effect of the position of the permanent magnet block 2 is changed.

The short bar-shaped groove 8 is an oblique structure, that is, the distances between the two ends of the short bar-shaped groove 8 and the center of the circle where the inner circular trajectory line 5-1 is located are not equal. But the bar-shaped short slot 8 should be within the range between the inner circular track line 5-1 and the outer circular track line 5-2, so that Hall 3 can feel the signal of the permanent magnet block 2 in the bar-shaped short slot 8 . The function and effect of the oblique strip-shaped short groove 8 is the same as that of the above-mentioned arc-shaped strip-shaped short groove 8 .

A certain inner edge of the strip-shaped short groove 8 is provided with two or more tooth-shaped protrusions 9 . In order to fix the permanent magnet block 2 on one of the multiple positions in the bar-shaped short groove 8, and prevent the permanent magnet block 2 from changing its position automatically when the annular groove rotating disk 1 rotates, so use the bar-shaped short groove 8 The tooth-shaped convex 9 clamps the permanent magnet block 2 in a certain fixed position.

The strip-shaped short slot 8 and the permanent magnet block 2 are a detachable clamping connection structure.

Hall 3 is set between the inner circular trajectory line 5-1 and the outer circular trajectory line 5-2. Because the Hall 3 is a part that can sense the magnetic flux of the permanent magnet block 2 at a distance and output an electric signal, and in order to minimize the volume of the permanent magnet block 2, it is necessary to set as many permanent magnet blocks as possible on the annular groove rotating disk 1 2. Make the permanent magnet block 2 as small as possible be induced by the Hall 3; the Hall 3 should be set between the inner circular trajectory line 5-1 and the outer circular trajectory line 5-2, and preferably located at Close to the position of the circular locus that can run through all the permanent magnet blocks 2.

The annular groove rotating disk 1 is provided with a central hole within the circle where the inner circular trajectory lines 5-1 of the plurality of permanent magnet blocks 2 are located. If the annular groove rotating disk 1 is to be worn on a rotating shaft and used, a hole for wearing the rotating shaft will be established on the annular groove rotating disk 1; when the annular groove rotating disk 1 rotates with the rotating shaft, Hall 3 can feel the motion signal of each permanent magnet block 2 on the annular groove rotating disk 1, so the threading hole on the annular groove rotating disk 1 should be located on the inner circular trajectory line 5 of a plurality of permanent magnet blocks 2 The center of the circle range where -1 is located, because the inner circular trajectory line 5-1 and the outer circular trajectory line 5-2 are concentric circles, of course the threading hole is at the center of the outer circular trajectory line 5-2 place circle range, and the sleeve is worn The hole is the center position hole of the inner circular trajectory line 5-1 and the outer circular trajectory line 5-2, i.e. the center hole. That is to say, the central hole is not necessarily circular, but can be square, triangular, etc., so that it can be nested with the rotating shafts of shapes such as square, triangular, etc., but the inner space of the central hole must include the inner circular trajectory line 5-1 The center of the circle where it is located can use a Hall 3 to sense the motion signals of all the permanent magnet blocks 2 on the annular groove rotating disk 1 and the annular groove rotating disk.

The annular groove rotating disk 1 is a certain kind of plastic plate, aluminum plate, copper plate of non-magnetic material. Because the present invention is a structure in which the magnetic polarities of adjacent permanent magnet blocks 2 are opposite, the edges of adjacent permanent magnet blocks 2 can be almost attached to each other and the Hall 3 can output electrical signals with control functions.

The present invention has the advantages of simple structure, low cost, unlimited number of permanent magnet blocks on the permanent magnet block ring, standard pulse signal output, no signal blind area, and only one set of Hall output signals can fully express All motion states of the moving disk, the output signal will not be distorted or drifted, the position of the permanent magnet block can be changed and adjusted between the positions of the permanent magnet block to indicate the fixed position of the permanent magnet block, and the output signal can include the movement of each permanent magnet block The position and output information model can be adjusted, and it is used to assist bicycles, so that the output of the assist can be highly matched with the demand for assist, so that the rider feels very comfortable. It can not only automatically assist, but also has the function of assisting according to individuality.

(1) Simple structure, no elastic parts, no mechanical failure: use the Hall to sense the rotation output signals of multiple permanent magnets, use the principle of the speed to calculate the torque provided by Chinese patent 01201843.0, and use a variety of mathematical models to calculate the torque of the power-assisted bicycle Parameters, used to control the motor of the assist bicycle to achieve assist. No elastic parts are needed, the structure is simple, and the cost is lower than that of sensors using elastic parts and mechanical force. It avoids the problems of deformation of various mechanical parts, no mechanical failure, and poor coordination after long-term use.

(2) The magnetic polarity is opposite, and the rectangular wave signal is output, which has precise control function: since the magnetic polarity of the adjacent permanent magnet block is opposite, and the Hall uses the Hall that generates a rectangular wave output signal for the opposite magnetic polarity, the adjacent permanent magnet Regardless of the block spacing, even if there is no gap between adjacent permanent magnet blocks, Hall can also output a rectangular wave signal. If it is used for power-assisted bicycles, using a rectangular wave output signal to control the motor of a power-assisted bicycle is better than using a sine wave, because the rectangular wave can make the signal at any point in time, and the meaning of the signal indicating the motion position and speed is accurate, so it can be accurately expressed The motion position and speed of the bicycle pedal are assisted, so that the correct power assist demand of the motion state can be calculated from the precise position and speed of the pedal.

(3) The magnetic polarity of adjacent permanent magnet blocks is opposite, the number of permanent magnet blocks is not limited, and the sensing points can be increased as much as possible: due to the opposite magnetic polarity, a rectangular wave signal is output, even if there is no gap between adjacent permanent magnet blocks, the The output signal is still a numerical and distinguishable rectangular wave signal, and still has a control function, that is to say, it will not output an unchanged linear signal without a control function. If it is used for power-assisted bicycles, since the diameter of the circular groove rotating disk linked with the pedal is limited, it is possible to increase the number of permanent magnet blocks and the sensing points as much as possible on the circular groove rotating disk of a specified size. As many sensor signals as possible indicate the position and speed of bicycle pedal movement, and accurately indicate the movement state.

(4) The magnetic polarity of the adjacent permanent magnet blocks is opposite, and more permanent magnet blocks and more sensing points can be set to accurately express the motion state of the ring groove rotating disc: for the ring-shaped fixed permanent magnet block used for power-assisted bicycles The size of the grooved rotating disk is strictly limited. Generally, the diameter of the annular grooved rotating disk can only be within 10-15 cm. In order for Hall to obtain the magnetic pole signal of the permanent magnet block under the condition of a distance, the diameter of the permanent magnet block must be at least Ф0.6-0.8 cm, then 35-73 permanent magnet blocks can be set without gaps around the ring groove rotating disk with a diameter of 10-15 cm [(10-1)*3.14/0.8=35; (15- 1) *3.14/0.6=73], that is, when the pedal rotates once, Hall can get 35-73 signals to control the motor of the power-assisted bicycle. But if it is the prior art with the same magnetic polarity of adjacent permanent magnet blocks, if the adjacent permanent magnet blocks are separated by 5 centimeters, then only 5-8 permanent magnets can be arranged at most on the circular groove rotating disk with a diameter of 10-15 centimeters. Block [(10-1)*3.14/5.8=5; (15-1)*3.14/5.6=8]. It can be seen that this patented technology can set 7-9 times more permanent magnet blocks [35/5=6; 73/8=9] than the prior art, and set 30-65 more permanent magnet blocks [35-5=30; 73 -8=65]. Therefore, the circular groove rotating disc rotates once, and the patented technology increases the rotation point signal of the annular groove rotating disc by 7-9 times compared with the prior art. The motor control accuracy of the power-assisted bicycle is naturally increased by 7-9 times, and the accuracy of the rider's demand for power assistance is also increased by 7-9 times. The degree of cooperation between the car and the person is greatly improved, and the comfort of the rider is greatly increased. , It is no longer the uncomfortable feeling of one speed and one slow speed of the moped in the prior art. According to the actual experience, when 15 permanent magnet blocks are arranged roughly evenly on the annular groove rotating disk, the present invention basically eliminates the one fast and one slow motion of the moped by only setting 5-8 permanent magnet blocks in the prior art. Uncomfortable feeling; when 20 permanent magnets are roughly evenly arranged on the circular groove rotating disc, the cooperation between the vehicle and the person can meet the needs of the person, and the feeling of riding the moped is very comfortable.

(5) There is no signal blind area, and matching power assistance will be obtained at any time: This patent can set up to 35-73 permanent magnet blocks around the circular groove rotating disk with a diameter of 10-15 cm. The average angle between them is 5-10 degrees. For power-assisted bicycles, when starting or running, there are 4-7 permanent magnet blocks in the 35-degree area of the pedal from 10-45 degrees away from the apex (there is a signal at a position 10 degrees away from the apex ), the Hall can output 4-7 control signals to respond to the need for power assistance, which can achieve the excellent technical effect of obtaining corresponding power assistance at any position and at any time, so that the cooperation between the car and the person is good, and the rider feels labor-saving and comfortable. comfortable.

(6) Only one Hall is used, and one control signal indicates the entire motion state of the circular groove rotating disk. The control signal is completely consistent with the motion state of the circular groove rotating disk, and the control signal is completely consistent with human needs: multiple permanent magnets The block is fixed on the circular groove rotating disk, the permanent magnet block and the circular groove rotating disk rotate synchronously, and a Hall is used to sense all the motion signals of the permanent magnet block, then the control signal output by the Hall and the circular groove rotating disk The motion state of the machine is completely consistent, and it is completely consistent with the needs of people. The control signal will not have the original segmentation error and signal drift. Even if the Hall sensing parameters change, the entire control signal moves in parallel. As long as the receiving range of the motor controller receiving the Hall control signal is wide, the control effect of the changed Hall control signal will change systematically. If it is used for power-assisted bicycles, the power-assisted demand model will not be distorted, and the matching relationship between the power-assisted output and the power-assisted demand still maintains the original model. Riders can easily grasp this systematic change in power-assisted performance.

(7) There is a dislocation between the permanent magnet blocks, and the dislocation permanent magnet block can indicate the motion state of a specific point: because the permanent magnet block is misaligned in the radial direction, or the distance between the arc lines is misaligned, the dislocation permanent magnet block makes Hall output a unique waveform control signal, the control signal with a unique waveform can directly represent the motion state of a fixed permanent magnet block on the circular groove rotating disk; if each permanent magnet block has its own specific dislocation point, it can achieve As many permanent magnet blocks as there are motion status signals of specific points can be obtained. For example, if it is used for power-assisted bicycles, the diameter of the circular groove rotating disk is within 10-15 cm. When the circular groove rotating disk makes one revolution, Hall can obtain 35-73 control signals of the motion status of different positions, and naturally knows 35-73 Site assistance needs. Obviously, the circular groove rotating disk rotates once, and the existing technology can only have 5-8 assisting demands at most, which is far inferior to the maximum 35-73 assisting demand signals available in this patent, which can truly reflect the rider's assisting demand . That is to say, the power-assisted bicycle uses this patented technology, and the bicycle can be more consistent with people's needs. The rider feels that the pedal can completely control the speed of the bicycle at any rotational position, and the comfort is good. And the power-assisted bicycle of prior art can only just can control the speed of a vehicle at most 5-8 rotational positions. the

(8) The position of the permanent magnet block can be adjusted, and the model of the control signal can be adjusted as required to realize personalized control: among all the permanent magnet blocks on the circular groove rotating disk, if the distance between some permanent magnet blocks is adjusted, the Huo In the output signal, the waveform of the permanent magnet block whose spacing has been adjusted will change the wave spacing, that is, the signal model will change, and different signal models can be selected to control the controlled object to achieve personalized control. If it is used for power-assisted bicycles, a suitable signal model can be selected according to different people's strength or habits of exertion, that is, the power-assisted model can be adjusted according to different people, so that the power-assisted bicycle can not only automatically assist, but also have the function of assisting according to individuality.

(9) The casing is composed of a ring-shaped groove rotating disk that can rotate relatively and the ring-shaped groove is fixed to fix the relative position of Hall and all permanent magnet blocks, avoiding environmental interference outside the casing and improving the reliability of Hall signals. Authenticity, authenticity, but also facilitates installation, commissioning, maintenance, etc.

(10) The hall signal can be digitally processed, so that the control model of the best cooperation between man and machine can be added to the control signal: the rectangular wave signal with the position of the magnetic block and the rotational speed of the magnetic block can be changed into a digital signal of the two elements, and the The digital signal of the two elements is converted into the digital signal of the booster model by a mathematical booster model suitable for man-machine cooperation, and then the digital signal of the booster model is converted into an analog signal of the booster model, and finally the analog signal of the booster model is converted into a stable voltage range A control signal available to a motor controller with rated power. In short, it is to digitally process the signal of the magnetic block rotation. During the digital processing process, a mathematical power-assisted model is added, so that the control signal output by the sensor finally contains the added power-assisted model. Because the mathematical power-assisted model is artificially set, the mathematical power-assisted model can always be set as the model most suitable for man-machine cooperation, then the sensor of the present invention can output a control signal that can realize the best man-machine cooperation. However, the magnetic blocks of the existing power-assisted bicycle sensors have the same magnetic poles on the same side, Hall cannot obtain a rectangular wave signal, and cannot digitally process the Hall signal, and its control model can only partially modify the Hall signal, so it cannot Realize the control signal outputting the best cooperation between man and machine.

(11) The final output control signal will not have signal drift: use the thermistor R6 to feedback and adjust the output signal of the operational amplifier, which can solve the problem of semiconductor devices such as Hall, digital-to-analog converter) and operational amplifiers. Due to the problem of drift, the final output of the sensor is the standard booster model analog signal that is not subject to ambient temperature changes. `` ``

Description of drawings

Figure 1 is a structural schematic diagram of a sensing element with a plurality of N-S alternating permanent magnet blocks unevenly distributed on the circular groove rotating disk, and the position of the permanent magnet block can be adjusted;

Figure 2 is a structural schematic diagram of a sensor with high-density and uneven distribution of multiple N-S alternating permanent magnet blocks on the circular groove rotating disk, and the position of the permanent magnet blocks can be adjusted;

Fig. 3 is a schematic cross-sectional structure diagram of the sensor;

Fig. 4 is a block diagram of signal flow of Hall, booster model processor, digital-to-analog converter, and operational amplifier;

Fig. 5 is a circuit diagram of Hall, microcontroller, digital-to-analog converter, and operational amplifier.

In the figure, 1 is an annular groove rotating disk, 2 is a permanent magnet block, 3 is a Hall, 5-1 is an inner circular trajectory line, 5-2 is an outer circular trajectory line, 6 is a circular ring, and 7 is a permanent magnet. Magnetic block spacing, 8 is a strip hole, 9 is a tooth-shaped convex, 21 is a power-assisted model processor, 22 is an analog-to-digital conversion and wave width identifier, 23 is a power-assisted starting point selector, 24 is a magnet speed calculator, 25 26 is a booster model memory, 26 is a booster model calculator, 27 is a digital-to-analog converter, 28 is an operational amplifier, 29 is a motor controller, 30 is a motor, 31 is a single-chip microcomputer, 32 is a clock circuit, and 40 is an annular groove fixed disk , 41 is a hollow ring, 42 is a bearing, and 59 is a circuit board.

Detailed ways

Embodiment 1, a sensor with adjustable positions of multiple magnetic blocks in the housing

As shown in Figures 1, 3, and 4, the sensor of this embodiment includes a sensing element connected in sequence, a booster model processor 21, a digital-to-analog converter 27, and an operational amplifier 28;

[1] The sensing element is an element that converts the rotational motion of the annular groove rotating disk 1 into a rectangular wave signal output;

The concave surfaces of an annular groove rotating disk 1 and an annular groove fixing disk 40 are opposite, and the size of the annular groove rotating disk 1 and the annular groove fixing disk 40 is just enough to make the annular groove fixing disk 40 fit in the ring. In the annular groove of the groove rotating disk 1, two disks are synthesized into a fitting inner hollow shell that can rotate relatively, and the concave surfaces of the two disks are sandwiched into a hollow ring 41; the annular groove rotating disk 1 at the position of the hollow ring 41 20 permanent magnet blocks 2 are fixedly arranged on the top. The annular groove rotating disk 1 and the annular groove fixed disk 40 are injection molded with high-strength plastics.

The diameter of the annular groove rotating disc 1 in the hollow ring 41 is 10.0 cm, and 20 permanent magnet blocks 2 are arranged on the annular groove rotating disc 1. The diameters of the 20 permanent magnet blocks 2 are respectively 0.8 cm, and the magnetic flux is 146-- A certain value in -279(B·H)max/KJ·m ^-3 . The structures of the annular groove rotating disk 1, the permanent magnet block 2 and the Hall 3 are as follows:

Each permanent magnet block 2 is fixed in the circular ring 6 range between the circular trajectory line 5-1-9.5 cm outer circular trajectory line 5-2 with a diameter of 8.0 cm, and there are a plurality of permanent magnet blocks 2 that are radially dislocated Distributed, there are a plurality of permanent magnet blocks 2 in dislocation distribution. the

Radius dislocation distribution mode is: the plurality of permanent magnet blocks 2 are distributed within the scope of a circular ring 6, and there is at least a A circular trajectory line runs through all the permanent magnet blocks 2; the inner circular trajectory line 5-1 and the outer circular trajectory line 5-2 are concentric circles, and there are at least two permanent magnet blocks 2 to the inner circular trajectory line 5-1 The distance from the center of the circle is not the same;

The spacing dislocation distribution method is as follows: the distance between adjacent permanent magnet blocks 2 is the permanent magnet block pitch 7; at least two permanent magnet block pitches 7 have different lengths.

The lengths of the two permanent magnet block intervals 7 are not equal to the lengths of any other permanent magnet block intervals 7, and the lengths of the two permanent magnet block intervals 7 are also not equal. There are two permanent magnets 2 at the two permanent magnet spacing 7, just at the two ends of a diameter of the rotating disk 1, and these two permanent magnets 2 are used to represent the positions of the two pedals on the power-assisted bicycle. exercise position.

There are two arc-shaped bar-shaped short grooves 8 between the inner circular trajectory line 5-1 and the outer circular trajectory line 5-2, and a permanent magnet block 2 is arranged in the bar-shaped short groove 8. The permanent magnet block 2 Can be fixed at any position in the strip-shaped short slot 8; the permanent magnet block 2 and the strip-shaped short slot 8 are removable fixed connection structures, that is, after the permanent magnet block 2 in the strip-shaped short slot 8 is removed Change to other positions in the bar-shaped short groove 8 and then fix and connect, and adjust the permanent magnet block spacing 7 between the permanent magnet block 2 and the adjacent permanent magnet block 2 . The inner edge of the strip-shaped short groove 8 is provided with two or more tooth-shaped protrusions 9 . A permanent magnet block 2 is stuck in a tooth-shaped protrusion 9 . The short bar-shaped groove 8 is an oblique structure, that is, the distances between the two ends of the short bar-shaped groove 8 and the center of the circle where the inner circular trajectory line 5-1 is located are not equal. Two or more permanent magnet blocks 2 of the strip-shaped short slots 8 are distributed in a radially dislocated manner.

All the permanent magnets 2 arranged on one side of the rotating disk 1 are arranged in such a way that the magnetic polarities of the adjacent permanent magnets 2 are opposite, that is, the magnetic polarity distribution mode of all the permanent magnets 2 on one surface of the rotating disk 1 is N pole, S Pole, N pole, S pole, N pole, S pole....

A Hall 3 is fixedly arranged on the annular groove fixed disk 40 in the hollow ring 41, and the signal output line of the Hall 3 passes through the annular groove fixed disk 40, that is, the Hall 3 is arranged on each permanent magnet block 2 Within the range of the ring 6 between the circular trajectory line 5-1 and the outer circular trajectory line 5-2, Hall 3 keeps a distance of 0.3 centimeters from each permanent magnet block 2 in the rotating state, so that the rotating When each permanent magnet block 2 passes through the Hall 3, the Hall 3 can generate a corresponding rectangular wave electric signal output.

Turning disc 1 is provided with central hole at the center of inner circular locus line 5-1 of these all permanent magnet pieces 2, and central hole is used for being enclosed within the pedal central axis of power-assisted bicycle or usefulness on the running wheel rotating shaft.

[2] The booster model processor 21 is a converter that converts the digital signal rotated by the annular groove rotating disk 1 into the signal form of the booster model digital signal;

The booster model processor 21 includes an analog-to-digital conversion and wave width identifier 22, a booster starting point selector 23, a magnet speed calculator 24, a booster model memory 25 and a booster model calculator 26;

The analog-to-digital conversion and wave width recognizer 22 is connected to the sensing element, and the analog-to-digital conversion and wave width recognizer 22 recognizes the width of each rectangular wave from the rectangular wave signal input by Hall 3 in the sensing element, and converts each rectangular wave signal Change into different digital signals, mark each rectangular wave, and the analog-to-digital conversion and wave width recognizer 22 outputs the magnetic block motion digital signal marked with the position order of the magnetic block;

Analog-to-digital conversion and wave width recognizer 22 are respectively connected with power-assisted starting point selector 23 and magnetic block speed calculator 24, and power-assisted starting point selector 23 is connected with magnetic block speed calculator 24; Magnetic block speed calculator 24 uses analog-to-digital conversion and The magnetic block motion digital signal input by the wave width identifier 22 calculates the rotational speed of the annular groove rotating disc 1, and transmits the rotational speed digital signal of the annular groove rotating disc 1 to the power-assisted starting point selector 23, and the power-assisted starting point selector 23 is marked with The magnetic block motion digital signal with the magnetic block position order, and the rotational speed digital signal of the annular groove rotating disk 1, these two signals determine a certain rectangular wave corresponding to the starting point of the power assist under a certain speed condition, that is, determine the magnetic block at the starting point of the power assist The power-assisted start point selector 23 has completed finding the starting point magnetic block of the power-assisted, that is to say, it is determined to start to implement the power-assisted power from a certain rectangular wave. The block starts to assist at a certain position, or starts from a certain magnetic block at a certain position, and changes the original assist model to the assist model selected in the next step for assist.

The power-assisted starting point selector 23 and the magnetic block rotating speed calculator 24 are all connected with the power-assisted model calculator 26 respectively, and the power-assisted model memory 25 is also connected with the power-assisted model calculator 26; block, and use the two conditions of the annular groove rotating disk 1 rotating speed of the magnetic block rotating speed calculator 24 to select a certain type of power-assisted model function in the power-assisted model memory 25, and the starting point magnetic block and the annular groove rotating disk 1 rotating speed These two conditions are substituted into the booster model function, and the booster model digital signal suitable for these two conditions is calculated, that is, the booster model calculator 26 outputs the booster model digital signal;

[3] The digital-to-analog converter 27 converts the assist model digital signal into an assist model analog signal.

The booster model calculator 26 is connected to a digital-to-analog converter 27, and the digital-to-analog converter 27 converts the booster model digital signal of the booster model calculator 26 into a booster model analog signal. In order to output the analog signal of the booster model to the motor controller 29 which can only process analog signals.

[4] The operational amplifier 28 converts the booster model analog signal from the digital-to-analog converter 27 into a booster model analog signal in the rated voltage range.

The digital-to-analog converter 27 is connected with the operational amplifier 28. Although the booster model analog signal of the digital-to-analog converter 27 solves the problem of the booster model, the voltage of the booster model signal can not meet the needs of the motor controller 29, so an operational amplifier is also used 28 converts the booster model analog signal into the booster model analog signal required by the rated voltage range, and then transmits it to the motor controller 29, so that the motor controller 29 can control the motor 30 to perform power boosting.

Embodiment 2, high-density sensors with adjustable positions of multiple magnetic blocks in the housing

As shown in Figures 2, 3, and 4, the diameter of the annular groove rotating disk 1 in the hollow ring 41 is 10.0 centimeters, and 40 permanent magnet blocks 2 are established at the annular groove rotating disk 1, and the diameters of the 40 permanent magnet blocks 2 are respectively 0.6 centimeter, the magnetic flux is a certain value in 146---279 (B·H)max/KJ·m ^-3 . Hall 3 keeps a distance of 0.2 cm from each permanent magnet 2 in the rotating state, so that when each rotating permanent magnet 2 passes through Hall 3, Hall 3 can generate a corresponding rectangular wave electric signal output. The circle where the arc of the arc-shaped bar-shaped short groove 8 is located and the inner circular locus 5-1 are concentric circles. The structures of other rotating disk 1, permanent magnet block 2, and Hall 3 are the same as those in embodiment 1.

Embodiment 3, a sensor with a specific circuit that can adjust the position of multiple magnetic blocks in the housing

As shown in Figures 1, 3, and 5, the sensor of this embodiment includes a sensing element connected in sequence, a booster model processor 21, a digital-to-analog converter 27, and an operational amplifier 28;

[1] The Hall 3 in the sensing element is UGN3075; the structure of other elements and elements in the sensing element is the same as that in Embodiment 1;

[2] The auxiliary model processor 21 selects the single-chip microcomputer 31 to complete all functions, and the single-chip microcomputer 31 selects AT89S52. That is, the AT89S52 single-chip microcomputer 31 completes all functions of the analog-to-digital conversion and the wave width identifier 22 , the power-assisted starting point selector 23 , the magnet speed calculator 24 , the power-assisted model memory 25 and the power-assisted model calculator 26 .

[3] The digital-to-analog converter 27 selects ADC-C8E.

[4] OF-17F is selected as the operational amplifier 28, and a 5k thermistor R6 is connected between the input terminal 2 pin and the output terminal 6 pin of the OF-17F operational amplifier 28; and an 8P capacitor is connected in parallel at both ends of the thermistor R6 C6. The 1.25k R5 is grounded between the 4 pins of the digital-to-analog converter 27 and the 2 pins of the operational amplifier 28. The thermistor R6 can be used to adjust the voltage range of the analog signal output by the 286 pin of the operational amplifier to be stable between 0.8--4.2V.

The connection relationship of each electronic component is as follows:

Connect pin 3 of signal output end of Hall 3 to pin 12 of MCU 31 INTO [P32];

The 39 pins P00 of the single-chip microcomputer 31 connect the 12 pins B8 of the digital-to-analog converter 27;

The 38-pin P01 of the single-chip microcomputer 31 is connected to the 11-pin B7 of the digital-to-analog converter 27;

The 37 pins P02 of the single-chip microcomputer 31 are connected to the 10 pins B6 of the digital-to-analog converter 27;

The 36-pin P03 of the single-chip microcomputer 31 is connected to the 9-pin B5 of the digital-to-analog converter 27;

The 35 pins P04 of the single-chip microcomputer 31 connect the 8 pins B4 of the digital-to-analog converter 27;

The 34-pin P05 of the single-chip microcomputer 31 is connected to the 7-pin B3 of the digital-to-analog converter 27;

The 33 pins P06 of the single-chip microcomputer 31 are connected to the 6 pins B2 of the digital-to-analog converter 27;

The 32 pins P07 of the microcontroller 31 are connected to the 5 pins B1 of the digital-to-analog converter 27;

The 4 pins of the digital-to-analog converter 27 are connected to the 2 pins of the operational amplifier 28;

The 2 pins of the digital-to-analog converter 27 are connected to the 3 pins of the operational amplifier 28;

Pin 6 of the operational amplifier 28 is an analog signal output terminal.

[5] Structural relationship between the mechanical parts of the sensor and the sensing parts: the mechanical parts of the sensor include an annular groove rotating disk 1 and a fitted annular groove fixed disk 40, and the sensing parts of the sensor include a plurality of permanent magnet blocks 2, Hall 3, single-chip microcomputer 31, digital-to-analog converter 27 and operational amplifier 28; Hall 3, single-chip microcomputer 31, digital-to-analog converter 27 and operational amplifier 28 four electronic elements that are connected successively in the sensing part are arranged on a circuit board 59 On the ring groove rotating disk 1 inwall of hollow ring 41, a plurality of permanent magnet blocks 2 are fixed, and circuit board 59 is fixed on the ring groove fixed disk 40 inwall of hollow ring 41, and Hall 3 on circuit board 59 is located at the energy Feel the magnetic flux of the permanent magnet block 2, and the Hall 3 can output and change the position of the electric signal according to the change of the magnetic flux. The sensing part is the sensing functional part of the sensor; the mechanical part has two functions, the first is to fix the relative position of each element in the sensing part, so that each element can form a sensing functional whole, and the second is to put The whole sensing function is fixed on the electric bicycle, and the whole sensing function can sense the motion state of the electric bicycle. The Hall 3, the single-chip microcomputer 31, the digital-to-analog converter 27 and the operational amplifier 28 four electronic components that are connected in turn are arranged on a circuit board 59, which is beneficial to the integration, modularization and miniaturization of these four electronic components, and facilitates these four electronic components. The four electronic components are integrally fixed on the inner wall of the annular groove fixing plate 40 of the hollow ring 41, which simplifies the process of manufacturing the sensor.

Claims (10)

1. the sensor of many magnetic patch position-adjustable in housing, comprises the sensing element, power-assisted model processor (21), digital to analog converter (27) and the operational amplifier (28) that connect successively; It is characterized in that:

［ 1 ］ sensing element is the rotational motion of annular groove rolling disc (1) to be become to the element of square-wave signal output;

Sensing element comprises annular groove rolling disc (1), annular groove shaft collar (40), a Hall (3) and many pieces of permanent magnets (2), annular groove rolling disc (1) is relative with both concave surfaces of annular groove shaft collar (40), annular groove shaft collar (40) is entrenched among the annular groove of annular groove rolling disc (1), become two dishes chimeric interior empty shell in relative rotation, the concave surface of two dishes presss from both sides into a cavity ring (41); On the annular groove rolling disc (1) of cavity ring (41) position, be fixedly installed many pieces of permanent magnets (2), these many pieces of permanent magnets (2) are distributed in an annular (6) scope, between the interior circular trajectory (5-1) of annular (6) and outer ring trajectory (5-2), have at least a circular rail trace to run through whole permanent magnets (2); Interior circular trajectory (5-1) and outer ring trajectory (5-2) are concentric circles, have at least two pieces of permanent magnets (2) to become to be dislocatedly distributed; Being dislocatedly distributed is radius mode or spacing a certain of mode that be dislocatedly distributed that be dislocatedly distributed; Or there are the radius mode that is dislocatedly distributed, an array mode that has again spacing to be dislocatedly distributed;

The radius mode of being dislocatedly distributed is: have at least two permanent magnets (2) not identical to the distance at circle center, interior circular trajectory (5-1) place;

The spacing mode of being dislocatedly distributed is: the distance between adjacent permanent magnets (2) is permanent magnets spacing (7); Have at least the length of two permanent magnets spacing (7) not identical;

Between interior circular trajectory (5-1) and outer ring trajectory (5-2), have a short groove of bar shaped (8) at least, be provided with permanent magnets (2) in the short groove of bar shaped (8), permanent magnets (2) can be fixed on any position in the short groove of bar shaped (8);

The magnetic polarity of adjacent permanent magnets (2) is contrary, and the magnetic polarity distribution mode of the upper whole permanent magnets (2) of annular groove rolling disc (1) is the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point

On the annular groove shaft collar (40) of cavity ring (41), be fixedly installed a Hall (3), Hall (3) is located at the position that approaches permanent magnets (2) and can experience each permanent magnets (2) magnetic flux, between Hall (3) and permanent magnets (2), has spacing; Hall (3) is opposite magnetic polarities to be produced to the Hall of square wave output signal;

［ 2 ］ power-assisted model processor (21) is the digital signal of annular groove rolling disc (1) rotation to be become to the signal form converter of power-assisted model digital signal;

Power-assisted model processor (21) comprises analog to digital conversion and the wide recognizer of ripple (22), power-assisted starting point selector switch (23), magnetic patch rotating speed counter (24), power-assisted model storer (25) and power-assisted model counter (26);

Analog to digital conversion is connected with sensing element with the wide recognizer of ripple (22), the width of each square wave identified the square-wave signal of Hall in sensing element (3) input by the wide recognizer of analog to digital conversion and ripple (22), each square-wave signal is become to different digital signals, each square wave is marked, and the wide recognizer of analog to digital conversion and ripple (22) output mark has the magnetic patch motion digital signal of magnetic patch position order;

Analog to digital conversion is connected with magnetic patch rotating speed counter (24) with power-assisted starting point selector switch (23) respectively with the wide recognizer of ripple (22), and power-assisted starting point selector switch (23) is connected with magnetic patch rotating speed counter (24), magnetic patch rotating speed counter (24) has the magnetic patch motion digital signal of magnetic patch position order to calculate the rotating speed of annular groove rolling disc (1) with the mark of analog to digital conversion and the wide recognizer of ripple (22) input, and the rotating speed digital signal of annular groove rolling disc (1) is passed to power-assisted starting point selector switch (23), power-assisted starting point selector switch (23) has the magnetic patch motion digital signal of magnetic patch position order with mark, determine some square waves corresponding to power-assisted starting point under certain speed conditions with these two signals of rotating speed digital signal of annular groove rolling disc (1), determine power-assisted starting point magnetic patch,

Power-assisted starting point selector switch (23) is all connected with power-assisted model counter (26) respectively with magnetic patch rotating speed counter (24), and power-assisted model storer (25) is also connected with power-assisted model counter (26); The power-assisted starting point magnetic patch of power-assisted starting point selector switch (23) for power-assisted model counter (26), select a certain power-assisted pattern function in power-assisted model storer (25) with these two conditions of annular groove rolling disc (1) rotating speed with magnetic patch rotating speed counter (24), and by power-assisted starting point magnetic patch and these two condition substitution power-assisted pattern functions of annular groove rolling disc (1) rotating speed, calculate the power-assisted model digital signal that is applicable to these two conditions, i.e. power-assisted model counter (26) output power-assisted model digital signal;

［ 3 ］ digital to analog converter (27) is power-assisted model digital signal to be converted to the simulating signal of power-assisted model;

Power-assisted model counter (26) is connected with digital to analog converter (27), and digital to analog converter (27) converts power-assisted modeling signal to the power-assisted model digital signal of power-assisted model counter (26);

［ 4 ］ operational amplifier (28) is the power-assisted modeling signal of digital to analog converter (27) to be converted to the power-assisted modeling signal of the range of nominal tension.

According to claim 1 in housing the sensor of many magnetic patch position-adjustable, it is characterized in that: also comprise thermistor R6, thermistor R6 is connected between the input end and output terminal of operational amplifier (28).

According to claim 2 in housing the sensor of many magnetic patch position-adjustable, it is characterized in that: power-assisted model processor (21) is single-chip microcomputer (31), is connected with clock circuit (32) on single-chip microcomputer (31);

The mechanical part of sensor and sensing element structural relation: the mechanical part of sensor comprises the annular groove shaft collar (40) of annular groove rolling disc (1) and tabling, the sensing element of sensor comprises a plurality of permanent magnets (2), Hall (3), single-chip microcomputer (31), digital to analog converter (27) and operational amplifier (28); In sensing element, connected Hall (3), single-chip microcomputer (31), digital to analog converter (27) and (28) four electronic components of operational amplifier are located on a circuit board (59) successively; The fixing a plurality of permanent magnets (2) of annular groove rolling disc (1) inwall in cavity ring (41), annular groove shaft collar (40) inwall fixing circuit board (59) in cavity ring (41), Hall (3) on circuit board (59) is located at the magnetic flux that can experience permanent magnets (2), and Hall (3) can be according to the position of magnetic flux change exporting change electric signal.

According to claim 3 in housing the sensor of many magnetic patch position-adjustable, it is characterized in that: Hall (3) is UGN3075, power-assisted model processor (21) is AT89S52 single-chip microcomputer (31), digital to analog converter (27) is ADC-C8E; Operational amplifier (28) is OF-17F, between input end 2 pin of OF-17F operational amplifier (28) and output terminal 6 pin, is connected with thermistor R6; Each parts annexation is as follows:

Signal output part 3 pin of Hall (3) connect 12 pin INTO ［ P32 ］ of single-chip microcomputer (31);

12 pin B8 of 39 pin P00 linking number weighted-voltage D/A converters (27) of single-chip microcomputer (31);

11 pin B7 of 38 pin P01 linking number weighted-voltage D/A converters (27) of single-chip microcomputer (31);

10 pin B6 of 37 pin P02 linking number weighted-voltage D/A converters (27) of single-chip microcomputer (31);

9 pin B5 of 36 pin P03 linking number weighted-voltage D/A converters (27) of single-chip microcomputer (31);

8 pin B4 of 35 pin P04 linking number weighted-voltage D/A converters (27) of single-chip microcomputer (31);

7 pin B3 of 34 pin P05 linking number weighted-voltage D/A converters (27) of single-chip microcomputer (31);

6 pin B2 of 33 pin P06 linking number weighted-voltage D/A converters (27) of single-chip microcomputer (31);

5 pin B1 of 32 pin P07 linking number weighted-voltage D/A converters (27) of single-chip microcomputer (31);

2 pin of 4 pin concatenation operation amplifiers (28) of digital to analog converter (27);

3 pin of 2 pin concatenation operation amplifiers (28) of digital to analog converter (27);

6 pin of operational amplifier (28) are analog signal output.

5. the sensor of many magnetic patch position-adjustable in housing described in any one according to claim 1-4, is characterized in that: have at least the length of a permanent magnets spacing (7) to be not equal to other any one permanent magnets spacing (7).

According to claim 5 in housing the sensor of many magnetic patch position-adjustable, it is characterized in that: between the outside surface of annular groove shaft collar (40) inner ring and the inside surface of annular groove rolling disc (1) inner ring, be provided with bearing (42).

According to claim 5 in housing the sensor of many magnetic patch position-adjustable, it is characterized in that: the short groove of bar shaped (8) is the structure of arc, the arc place circle of the short groove of bar shaped (8) is concentric circles with interior circular trajectory (5-1).

According to claim 5 in housing the sensor of many magnetic patch position-adjustable, it is characterized in that: the short groove of bar shaped (8) is oblique structure, i.e. the short groove of bar shaped (8) two ends are unequal with the distance in the center of circle at interior circular trajectory (5-1) place respectively.

According to claim 7 in housing the sensor of many magnetic patch position-adjustable, it is characterized in that: a certain inward flange of the short groove of bar shaped (8) is provided with two or more profiles of tooth protruding (9).

According to claim 9 in housing the sensor of many magnetic patch position-adjustable, it is characterized in that: the short groove of bar shaped (8) is the clamping connecting structure that can discharge with permanent magnets (2).