Turntable sensing element with multiple magnetic plates and non-uniform distribution of magnetic flux

一种均匀分布、传感元件的技术，应用在功计量、车辆部件、转矩计量等方向，能够解决助力输出与助力需求不一致、三个控制信号原始分段误差、助力需求模型失真等问题

Inactive Publication Date: 2015-08-05
HUNAN SHUANGCHUANG TRIBAL INFORMATION CONSULTING SERVICE CO LTD
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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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  • Turntable sensing element with multiple magnetic plates and non-uniform distribution of magnetic flux
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  • Turntable sensing element with multiple magnetic plates and non-uniform distribution of magnetic flux

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Embodiment 1, multi-magnetic plates and a rotating disk sensor element with non-uniform distribution of magnetic flux

[0070] Such as figure 1 20 permanent magnet sheets 2 are pasted on the plane of one face of the rotating disk 1 with a high-strength plastic injection molding diameter of 10.0 cm. On the surface of the rotating disk 1 and the surface of the permanent magnet sheet 2, the permanent magnet sheet 2 is also pasted with a clamping magnetic sheet layer 8, and the permanent magnet sheet 2 is clamped and fixed between the rotating disk 1 and the clamping magnetic sheet layer 8. The thickness of the permanent magnet sheet 2 is 0.3 mm, and the magnetic flux of the permanent magnet sheet 2 is 146---279 (B·H)max / KJ·m -3 one of the values ​​in .

[0071] Holding the magnetic sheet layer 8 is to cast a polyurethane adhesive liquid on the surface of the rotating disk 1 with the permanent magnetic sheet 2 and the surface of the permanent magnetic sheet 2. After the ...

Embodiment 2

[0080] Embodiment 2, Hall multi-magnetic sheet with permanent magnet outer sleeve and rotary disk sensor element with non-uniform distribution of magnetic flux

[0081] Such as figure 1 , 3 , as in Embodiment 1, and the Hall 3 is covered with a removable outer sleeve 9 at the end close to the permanent magnet sheet 2, the side wall of the outer sleeve 9 is made of non-magnetic plastic, and the outer sleeve The tube side wall of the tube 9 is screw-connected removably with the Hall 3, and the tube bottom plate 10 of the outer tube 9 is a permanent magnet plate. The permanent magnet tube bottom plate 10 and the plastic tube side wall of the outer sleeve 9 are removable. The permanent magnet base plate 10 can face the induction head of the Hall 3 with a magnetic north pole or a magnetic south pole. Its strong magnetic flux of the permanent magnet tube bottom plate 10 is 10% of the lowest magnetic flux value among the multiple permanent magnet sheets 2 , that is, the strong ma...

Embodiment 3

[0082] Embodiment 3, Hall has multi-magnetic sheets with an iron-plate-type cylinder bottom outer sleeve and a rotary-disk sensor element with non-uniform distribution of magnetic flux

[0083] Such as figure 1 , 3 , as in embodiment 1, and the Hall 3 is covered with a removable outer sleeve 9 at the end close to the permanent magnet sheet 2, the outer sleeve 9 is made of a magnetically conductive thin iron plate, and the outer sleeve 9 The cylinder side wall is connected with Hall 3 in a detachable screw connection, and the cylinder bottom plate 10 of the outer sleeve 9 is a thin iron plate. The thickness of the tube bottom plate 10 thin iron plate of different outer sleeves 9 is different, thereby the magnetic permeability is different. The sleeve bottom plate 10 of outer sleeve 9 can also use thin magnetic sheet. Other structures are the same as in Embodiment 1.

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Abstract

The invention relates to a rotary table type sensing element with multiple magnets and magnetic fluxes distributed unevenly, belonging to the technical field of magnetic induction signal providing, in particular relates to a technology for realizing multi-point position magnetic induction control signal providing on a rotating component. A rotary table is fixedly provided with multiple permanent magnets which are circularly distributed, and spaces and magnetic fluxes of multiple permanent magnets are different from each other, and magnetic polarities of adjacent permanent magnets on one side of the rotary table are opposite, namely a magnetic polarity distribution manner of the all the permanent magnets on one side of the rotary table is an N pole, an S pole, an N pole...; and a Hall is arranged at a position close to the permanent magnets. The rotary table type sensing element with multiple magnets and magnetic fluxes distributed unevenly disclosed by the invention has the advantages that magnetic polarities of adjacent permanent magnets are in an NS opposite distribution manner, thus the Hall can acquire a square-wave signal, and digital processing on a signal can be carried out conveniently; and the spaces and the magnetic fluxes are different, thus the square-wave signal can show positions of the permanent magnets on the rotary table, and applications of different square waves can be determined.

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 & AuthorityPatents(China)
IPC IPC(8): B62M6/50G01L3/00G01P3/481
Inventor黄强
OwnerHUNAN SHUANGCHUANG TRIBAL INFORMATION CONSULTING SERVICE CO LTD