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Assisted bicycle using sensor capable of regulating positions of magnetic blocks in housing and magnetic flux

A technology of power-assisted bicycles and sensors, which is applied in the direction of transmitting sensing components, converting sensor output, and instruments by using electric/magnetic devices, which can solve the inconsistency between power-assisted output and power-assisted requirements, combined control signals are prone to signal drift, and feel uncomfortable, etc. question

Active Publication Date: 2012-11-28
江苏精工泵业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] 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
[0017] 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
[0018] 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
[0019] 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.
[0020] 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
[0021] 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, making the rider feel very uncomfortable, and will not get assistance when starting
To make it undistorted to help the demand model, and to ensure the smooth operation of the motor, there are always two issues. It is impossible to have both.

Method used

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  • Assisted bicycle using sensor capable of regulating positions of magnetic blocks in housing and magnetic flux
  • Assisted bicycle using sensor capable of regulating positions of magnetic blocks in housing and magnetic flux
  • Assisted bicycle using sensor capable of regulating positions of magnetic blocks in housing and magnetic flux

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0139] Embodiment 1, the power-assisted bicycle with the adjustable sensor of the magnetic block position and magnetic flux in the housing

[0140] Such as figure 1 , 3 , 4, 6, the sensor among the present invention is installed on the central axis 51 of existing electric bicycle, the signal output line of sensor is connected with the motor controller 29 of electric bicycle, just obtains power-assisted bicycle of the present invention.

[0141] 1. The components and structure of the electric bicycle related to the installation of the sensor: the electric bicycle has a central shaft 51, and the middle section of the central shaft 51 is covered with a bushing 52, and the central shaft 51 is connected to the bushing 52 in rotation; the chain disc 53 is fixed on the central shaft 51 The two ends of the central axis 51 are respectively fixed with pedals 54; the inner surface of the casing 52 is connected to the central axis 51 in rotation, and the outer surface of the casing 52 i...

Embodiment 2

[0166] Embodiment 2. High-density power-assisted bicycle with adjustable sensor for magnetic block position and magnetic flux in the housing

[0167] Such as figure 2 , 3 , 4, 6, 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 centimeters, The magnetic flux is 146---279(B·H)max / KJ·m -3 Different selection values ​​within the range, and the magnetic flux of adjacent permanent magnet block 2 is not equal. 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. T...

Embodiment 3

[0168] Embodiment 3, a power-assisted bicycle with a specific circuit that uses the position of the magnetic block in the housing and the adjustable sensor of the magnetic flux

[0169] Such as figure 1 , 3 , 5, 6, as in embodiment 1, the sensor includes a sensing element connected in sequence, a booster model processor 21, a digital-to-analog converter 27 and an operational amplifier 28;

[0170] [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;

[0171] [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 peak recognizer 22 , the power-assisted starting point selector 23 , the magnet speed calculator 24 , the power-assisted model memory 2...

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PUM

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Abstract

The invention discloses an assisted bicycle using a sensor with non-uniform distribution of multiple magnetic blocks in a housing, and belongs to an electric assisted bicycle capable of providing assisting signals by multi-point magnetic induction. The sensor comprises a sensing element, an assisting model processor, a digital-analog converter and an operational amplifier, which are sequentially connected, wherein the sensing element comprises a rotating disk and a fixed disk, permanent magnets and Halls are arranged in internal space, a plurality of the permanent magnets, which have the opposite magnetic polarities in the adjacent permanent magnets and can regulate the intervals and the positions with different magnetic fluxes, are arranged on the rotating disk, and the Halls on the fixed disk are arranged in the positions near the permanent magnets. The sensor is sheathed outside a center shaft of the bicycle, and the operational amplifier is connected with a motor controller. The assisted bicycle has the advantages that the relative positions of the permanent magnets and the Halls are fixed, and the Halls can obtain rectangular wave signals, so that the sensor can conveniently output an assisted model which is artificially set and can be regulated by digital processing to realize reasonable start point and end point of assisting, as well as reasonable force, enable a person and a machine to realize optimal matching and save electricity.

Description

technical field [0001] The invention belongs to the technical field of power-assisted bicycles, in particular to an electric power-assisted bicycle that performs multi-point magnetic induction on a rotating part to provide power-assisted signals. Background technique [0002] 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. [0003] The Chinese patent 01201843.0 "Automatic Detection Devi...

Claims

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Application Information

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IPC IPC(8): B62M6/50G01D5/244
CPCB62M6/65G01D5/244B62M6/50
Inventor 黄强
Owner 江苏精工泵业有限公司
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