Multi-antipode magnetoelectric encoder angle value redundancy output method and device

Abstract

The invention relates to a multi-antipode magnetoelectric encoder angle value redundancy output method and device. According to an implementation device based on the multi-antipode magnetoelectric encoder angle value redundancy output method, the method comprises the following steps: firstly, calculating a single-antipode angle value theta 1 and a multi-antipode angle value theta 2; carrying out angle value subdivision to obtain a plurality of pairs of subdivided polar angle values theta 3; scaling the theta 3 in equal proportion to obtain a plurality of antipodal angle values theta 4 with theangle amplitude range of 0-65535LSB; fitting the single-antipode angle value theta1 to the angle value theta 4 to obtain a fitted single-antipode angle value theta 5; and determining the final anglevalue theta fin output according to the difference value range of the fitted single-antipode angle value theta 5 and angle value theta 4; determining whether the angle value difference value range exceeds a set range or not, so as to determine whether the angle value theta 4 has a solving fault or not; if so, outputting the angle value theta 5 as a final angle value theta fin, and if not, outputting the angle value theta 4 as the final angle value theta fin. The invention aims to correct the jump point error of the magnetoelectric encoder, even if the temperature changes, the measurement result of the magnetoelectric encoder can be prevented from generating jump points, and the measurement precision of the magnetoelectric encoder is effectively improved.

Description

technical field [0001] The present invention generally relates to a magnetoelectric encoder, in particular to a method and device for realizing redundant output of angle values ​​of a multi-pole magnetoelectric encoder. Background technique [0002] The magnetoelectric encoder is a kind of measuring device. Its principle is to measure the angle or displacement of the magnetic material by using sensors such as magnetoresistive or Hall elements. The change of the angle or displacement of the magnetic material will cause the change of resistance or voltage. The circuit amplifies the variation, and outputs a pulse signal or an analog signal after being processed by a single-chip microcomputer, so as to achieve the purpose of measurement. Magnetic encoders have the characteristics of anti-vibration, anti-corrosion, anti-pollution, anti-interference and wide temperature. Therefore, they can be widely used in industrial control, machinery manufacturing, ships, textiles, printing, a...

AI Technical Summary

Problems solved by technology

[0004] However, in the actual working environment, multi-pole magnets often crack due to environmental vibration or high temperature, because the output of the angle value of the multi-pole magnetoelectric encoder depends on the multi-pole angle value and the single-pole angle value. Solve the corresponding relationship of the polar angle values. When the magnetic steel of the multi-pole magnetoelectric encoder suddenly breaks, it will cause a sudden jump in the output of the angle value, the output of the angle value is wrong, and the control system cannot be used normally. The invention proposes a redundant angle value output method. When the multi-pole magnetic steel fails, the single-pole angle value is used to maintain the normal output of the angle value, which improves the overall reliability of the control system.

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