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Magnetic Rotary Encoder

A rotary encoder and magnetic technology, which is applied in the direction of transmitting sensing components using electric/magnetic devices, can solve problems such as magnetic signal interference, and achieve the effects of strong mechanical shock resistance, simple internal mechanism, and good anti-interference

Active Publication Date: 2017-12-05
EASTERN COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantage that the magnetic sensor in the prior art is susceptible to external magnetic signal interference, and to provide a sensor that can eliminate most of the energy of the external magnetic signal, with good anti-interference performance and good signal stability. , magnetic rotary encoder with high output signal accuracy

Method used

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] like figure 1 , figure 2 , image 3 , Figure 4 The illustrated embodiment is a magnetic rotary encoder,

[0032] It includes a casing 1 with an open upper end, a rotating shaft 2 made of non-magnetic material that protrudes from the bottom plate of the casing at one end, and a bearing 3 sleeved on the rotating shaft and in contact with the inner wall of the casing, located in the middle of the upper end surface of the rotating shaft The collar 4, the permanent magnet 5 arranged in the collar, and the lower magnetic protective plate 6 arranged on the rotating shaft for eliminating the external magnetic signal below the permanent magnet;

[0033] like figure 2 Shown, be located at the circuit board 7 on the housing inner wall above the permanent magnet, be located at the magnetic sensor 8 on the lower surface of the circuit board, ...

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Abstract

The invention discloses a magnetic rotary encoder, which comprises a casing with an open upper end, a rotating shaft with one end protruding from the bottom plate of the casing and made of non-magnetic material, sleeved on the rotating shaft and in contact with the inner wall of the casing Bearing, the collar set in the middle of the upper end face of the rotating shaft, the permanent magnet set in the collar, the lower magnetic protection plate set on the rotating shaft to eliminate the external magnetic signal under the permanent magnet, set in the housing above the permanent magnet The circuit board on the wall, the magnetic sensor located on the lower surface of the circuit board, the upper magnetic protection plate located on the inner wall of the housing above the circuit board, the cover plate located at the upper end of the housing, and the wire extension electrically connected to the magnetic sensor out of the case. The invention has the characteristics of eliminating most of the energy of external magnetic signals, good anti-interference performance, good signal stability and high output signal precision.

Description

technical field [0001] The invention relates to the technical field of protection against non-target magnetic signal interference of a magnetic sensor, in particular to a magnetic rotary encoder capable of eliminating most of the energy of an external magnetic signal, with good anti-interference performance, good signal stability, and high output signal precision. Background technique [0002] Through photoelectric or magnetoelectric conversion, rotary encoders can convert mechanical quantities such as angular displacement and angular velocity of the output shaft into corresponding electrical pulses and output them in digital quantities. They are widely used in speed control and position control. [0003] The usual magnetic rotary encoder uses an integrated magnetoelectric conversion chip. The magnetoelectric conversion chip integrates a high-precision AD module. When the number of pulses output by the rotary encoder per revolution is high, it is susceptible to interference f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/12
Inventor 郭启军刘俐训李丹范礼
Owner EASTERN COMM
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