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Sensing element with unevenly distributed multiple magnetic sheet locations and magnetic flux inside casing

A technology of evenly distributed, sensing elements, applied in the direction of transmission of sensing components, vehicle components, transportation and packaging using electric/magnetic devices, which can solve problems such as different sensing parameters, large differences in sensing parameters, and distortion of power demand models.

Inactive Publication Date: 2013-11-06
湖南双创部落信息咨询服务有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] 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 pedals Rotation position: There is no difference between the two permanent magnets. The advantage is that the fixed positions of the two pedals can be expressed 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 magnetic steel itself cannot indicate the rotation position of the pedal, but can only use multiple Halls at different corner positions to indicate the rotation position of the pedal, so it is not possible to use only one Hall, but must use multiple Halls
[0016] Disadvantage (2) Only one Hall cannot be used, but three Halls will inevitably cause the original segmentation error of the three control signals, which will distort the power-assist demand model, naturally The generation of power output is inconsistent with the demand for power assistance: no matter whether the power-assisted bicycle has one or two motors, the sensor signal for controlling the motor can only be controlled by using one sensor signal input to the motor controller; and the patent uses three sensors. If Hall controls the motor, the three control signals of the three Halls must be combined into one combined control signal before it can be 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
However, such a structure limits the adjustment of the position of the permanent magnet on the rotating disk, resulting in a sensor with only one sensing model

Method used

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  • Sensing element with unevenly distributed multiple magnetic sheet locations and magnetic flux inside casing
  • Sensing element with unevenly distributed multiple magnetic sheet locations and magnetic flux inside casing
  • Sensing element with unevenly distributed multiple magnetic sheet locations and magnetic flux inside casing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Embodiment 1, a sensor element in which the position of multiple magnetic sheets and the magnetic flux are unevenly distributed in the shell of a Hall output multiple signal model

[0075] Such as figure 1 , 3 , with the concave surfaces of an annular groove rotating disk 1 and an annular groove fixing disk 40 facing each other, the size of the annular groove rotating disk 1 and the annular groove fixing disk 40 just makes the annular groove fixing disk 40 fit in In the annular groove of the annular 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 at the position of the hollow ring 41 1 is pasted and fixed with 20 permanent magnet sheets 2. On the surface of the annular groove rotating disk 1 with the permanent magnet sheet 2 and the surface of the permanent magnet sheet 2, a clamping magnetic ...

Embodiment 2

[0088] Embodiment 2, Sensing element with non-uniform distribution of multi-magnetic sheet positions and magnetic flux in a high-density housing

[0089] Such as figure 2 , 3 , the diameter of the circular groove rotating disk 1 in the hollow ring 41 is 10.0 centimeters, and 40 permanent magnet sheets 2 are established on the annular groove rotating disk 1, and the diameters of the 40 permanent magnet sheets 2 are respectively 0.6 centimeters, and the permanent magnet sheets 2 The thickness is 0.2mm, the magnetic flux is 146---279(B·H)max / KJ·m -3 Different selection values ​​within the range, and the magnetic fluxes of adjacent permanent magnets 2 are 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 structures of other rotating discs 1, permanent magnets 2, and Hall 3 are the sa...

Embodiment 3

[0090] Embodiment 3, using a plurality of Halls to select any one of the signal models in the casing of the multi-magnetic sheet position and the sensor element with uneven distribution of magnetic flux

[0091] Such as figure 1 , 4 , The structure of the rotating disc 1, the permanent magnet sheet 2, and the Hall 3 is the same as that of the embodiment 1. The few differences are as follows:

[0092] The thickness of the permanent magnet sheet 2 is 0.5 mm.

[0093] Hall hole and Hall: The annular groove fixed disk 40 has six Hall holes 11 , and the six Hall holes 11 are different from the center of the circle where the circular trajectory lines of the permanent magnet pieces 2 are located. That is, the semi-longitude lengths from each Hall hole 11 to the center of the circle where the circular locus line is located are unequal, but each Hall hole 11 is at the inner circular locus line 5-1 of the annular groove rotating disk 1 and the outer circular locus line 5-1. Corresp...

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Abstract

The invention discloses a sensing element with non-uniform distribution of multiple magnetic block positions and magnetic flux in a casing and belongs to a technology of providing a control signal by multi-point magnetic induction. Permanent magnet blocks and a Hall are arranged in an inner hollow casing formed by embedding a rotary disk with a fixed disk; a plurality of permanent magnet blocks which are circularly distributed are fixedly arranged on the rotary disk; the permanent magnet blocks are different in space and magnetic flux; magnetic polarities of adjacent permanent magnets on a certain surface of the rotary disk are opposite, i.e., the magnet polarity distribution mode of all permanent magnet blocks on the certain surface is N pole, S pole, N pole and the like; and the Hall on the fixed disk is arranged at a position close to the permanent magnet block. The sensing element has the advantages that the magnetic polarities of adjacent permanent magnets are in an NS opposite distribution mode, so that the Hall can acquire a rectangular wave signal which is conveniently and digitally processed; by using the characteristics that the spaces and the magnetic fluxes are respectively different, the rectangular wave signal can express the position of the permanent magnet blocks on the rotary disk and determine purposes of different rectangular waves; and a relative position between the permanent magnet blocks and the Hall is fixed, and thus the reliability in signal output is realized.

Description

technical field [0001] 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 [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 Device ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/12B62M6/50
Inventor 黄强
Owner 湖南双创部落信息咨询服务有限责任公司
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