Hall signal sampling magnetoelectric encoder for suppressing interference and temperature drift

A magnetoelectric encoder and Hall signal technology, applied in the direction of transmitting sensing components, instruments, and converting sensor output using electric/magnetic devices, can solve problems such as low precision and angle delay of magnetoelectric encoders, and achieve improved The effect of measurement accuracy

Pending Publication Date: 2018-05-29
张洪国
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  • Abstract
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  • Application Information

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Problems solved by technology

[0010] In order to solve the above problems, the present invention provides a Hall signal sampling magnetoelectric encoder that suppresses interference...

Method used

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  • Hall signal sampling magnetoelectric encoder for suppressing interference and temperature drift
  • Hall signal sampling magnetoelectric encoder for suppressing interference and temperature drift
  • Hall signal sampling magnetoelectric encoder for suppressing interference and temperature drift

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Embodiment 1

[0032] Embodiment 1, see attached figure 1 ,2.

[0033] A hall signal sampling magnetoelectric encoder for suppressing interference and temperature drift of the present invention includes an encoder support frame 3, one end 3-1 of the encoder support frame is fixedly connected to the motor flange 1-2, and the encoder supports The other end 3-2 of the frame is fixedly connected to the code disc 4 of the magnetoelectric encoder, and four Hall elements with a phase difference of 90° in turn are welded on the code disc 4 of the magnetoelectric encoder, respectively Hall sensor A1 and Hall sensor B1 , the Hall sensor A2, the Hall sensor B2 and the differential amplifier 9 are used for sampling, receiving and processing the magnetic field signal, and the motor shaft 1-1 is fixedly connected with the magnet 2 for generating the magnetic field signal. When the motor 1 rotates, it drives the magnet steel 2 to rotate, generating a changing magnetic field signal, which is fixed on the m...

Embodiment 2

[0034] Embodiment 2, see attached figure 1 ,2.

[0035] Others are the same as in Embodiment 1, the difference is that two differential signals will be obtained , It is directly reported to the processing unit of the servo control system. When the servo system needs the angle value, the arc tangent of the two signals is calculated in real time to obtain the angle value of the magnetoelectric encoder without delay.

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Abstract

A Hall signal sampling magnetoelectric encoder for suppressing interference and temperature drift relates to the field of sensor technology. The Hall signal sampling magnetoelectric encoder solves theproblems that the existing magnetoelectric coding structure is complicated and has high cost, at the same time, the interference and temperature drift errors of the double Hall signal sampling magnetic encoder are suppressed, and the angular delay phenomenon of the magnetoelectric encoder is eliminated. The Hall signal sampling magnetoelectric encoder adopts a patch of magnetic steel, and the magnetic steel rotates to generate a variable magnetic field signal. Four Hall sensors with a phase difference of 90 DEG are welded to a magnetoelectric encoder code wheel to sample a magnetic field signal, so that the overall structure is enabled to be simple and compact. Signals of the two oppositely-welded Hall sensors are differentiated by a differential amplifier to obtain two differential signals. The two differential signals are subjected to arc tangent calculation to obtain the angle value, and the angle of the magnetoelectric encoder is measured.

Description

technical field [0001] The invention relates to the field of angle detection of a magnetoelectric encoder, belongs to the subject of sensors, in particular to a magnetoelectric encoder using four Hall sensors. Background technique [0002] CN205642281U discloses a dual Hall signal sampling magnetoelectric encoder, yet this design has the following problems and shortcomings: the dual Hall signal sampling magnetoelectric encoder is due to the temperature drift characteristics of the Hall signal and the interference in the working environment The signal makes its accuracy not high, and its popularization and application are limited. [0003] At present, the signals collected by the Hall elements of the dual Hall magnetoelectric encoder are as follows: [0004] [0005] [0006] Because the Hall elements used are of the same type, the interference signal N and the temperature drift M of each Hall element are consistent, and then the arc tangent of the signal is calculated...

Claims

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Application Information

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IPC IPC(8): G01D5/14
CPCG01D5/147
Inventor 张洪国董瑞佳赵辉徐连波孟广双史英明张丽王惠
Owner 张洪国
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