Domain angle magnetoelectric encoder and signal logic extension fine division method thereof

Abstract

The invention discloses a domain angle encoder and a signal logic extension fine division method thereof. According to the encoder, a workable space with a narrow domain angle is fully utilized; the layout of the symmetrical structure design of single-antipode magnetic steel and the multi-antipode magnetic steel is adopted; single-antipode magnetic field signals and multi-antipode magnetic field signals are collected by adopting a patch Hall; the method aims at the characteristic of angle signal distortion of a domain angle magnetoelectric encoder; the angle value signal of the domain angle magnetoelectric encoder is supplemented completely by adopting a virtual domain angle filling method; the angle value of the magnetoelectric encoder is finely divided by adopting an active adaptive multi-window filtering angle fine division method; the problem of incorrect interval judgment caused by angle value noise of the magnetoelectric encoder is eliminated; the resolution of the domain angle magnetoelectric encoder is effectively improved; through the method, the encoder can effectively eliminate the influence of angle value bounce, the motor speed control is more stable, the current sinecharacteristic is better, the resolution can reach 13 bits, and the precision reaches + / -0.25 degree.

Description

Technical field: [0001] The invention relates to a field angle magnetic electric encoder and a signal logic extension and fine division method thereof, and belongs to the technical field of magnetic electric encoder manufacturing. Background technique: [0002] At present, the mainstream products of high-precision encoders can be divided into: photoelectric encoders, magnetic encoders, rotary transformers, inductive angular displacement sensors, and capacitive angular displacement sensors. [0003] Among them, the magnetic encoder is mainly composed of permanent magnets and magnetic sensitive components. The magneto-sensitive element can induce the spatial magnetic field change caused by the permanent magnet's rotating motion through the Hall effect or the magnetoresistance effect, and can convert this magnetic field change into the change of the voltage signal, and can reach the rotating part through the subsequent signal processing system. The purpose of angular displacement det...

AI Technical Summary

Problems solved by technology

[0007] The invention discloses a field angle magnetoelectric encoder and its signal logic extension fine division method, by using the domain angle encoder structure and its signal logic extension fine division method described in the present invention, the domain angle can be fully utilized Narrow workable space, aiming at the characteristics of the angle signal distortion of the field angle magnetoelectric encoder, eliminates the problem of inaccurate interval judgment caused by the angle value noise of the magnetoelectric encoder, and effectively improves the resolution of the field angle magnetoelectric encoder

Images