Rotary disc type sensing element with unevenly distributed multiple magnets and magnetic fluxes

A technology of uniform distribution and sensing elements, which is applied in power measurement, vehicle components, torque measurement, etc., can solve the problems that the sensor has only one sensing model, and the permanent magnetic steel cannot indicate the rotation position of the pedal, etc.

Inactive Publication Date: 2013-11-06
湖南双创部落信息咨询服务有限责任公司
View PDF8 Cites 0 Cited by
  • 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
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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rotary disc type sensing element with unevenly distributed multiple magnets and magnetic fluxes
  • Rotary disc type sensing element with unevenly distributed multiple magnets and magnetic fluxes
  • Rotary disc type sensing element with unevenly distributed multiple magnets and magnetic fluxes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Embodiment 1, multi-magnetic plates and a rotating disk sensor element with non-uniform distribution of magnetic flux

[0071] 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 .

[0072] 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

[0081] Embodiment 2, Hall multi-magnetic sheet with permanent magnet outer sleeve and rotary disk sensor element with non-uniform distribution of magnetic flux

[0082] 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

[0083] 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

[0084] 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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

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

[0001] technical field [0002] 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 [0003] 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. [0004] The Chinese patent 01201843.0 "Automatic Detectio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(China)
IPC IPC(8): B62M6/50G01L3/00G01P3/481
Inventor黄强
Owner湖南双创部落信息咨询服务有限责任公司