Method and device for suppressing jump point of angle interval scanning angle value based on pole number look-up table

Abstract

The invention relates to an angle zone scanning angle value jump point suppression method based on pole number table checking, and a device. The method comprises the following steps: a single-pair pole hall sensor and a multi-pair pole hall sensor measure an angle value signal, an A / D converter performs analog-to-digital conversion for a hall signal, and a single-pair pole angle value theta 1 anda multi-pair pole angle value theta 2 are obtained through a calculation module; an angle valve extreme value zone tabulation module performs tabulation for the pole number Pcheck of the multi-pair poles and the number of zones Zcheck according to the single-pair pole angle value theta 1 and the multi-pair pole angle value theta, the number of the current multi-pair pole angle value zones is judged through a zone judging module; by a zone scanning comparison module, comparison and judgement are executed for the table checking zone Zcheck and the zone value Zjudge wherein the multi-pair pole angle value theta 2 is, and a pole number adjustment value Pmod is output according to a judgement result; and multi-pair pole angle value fine segmentation processing is executed according to the Pmodand the Pcheck, and a high-resolution angle value theta duo-org is output. With the method and the device provided by the invention, a multi-pair pole angle value jump point problem caused by the reasons, such as angle value noise and temperature variation, can be suppressed effectively, reliability and resolution of a multi-pair pole coder are improved.

Description

technical field [0001] The present invention generally relates to a magnetoelectric encoder, and in particular relates to a method and device for suppressing jumping points of angle values ​​of a multi-pole magnetoelectric encoder. Background technique [0002] 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, aviation, aerospace, radar, communications, military industry, etc. field. A magnetoelectric encoder includes a stator, rotor, permanent magnets, Hall sensors and a signal processing board. The permanent magnet is glued on the rotor, and the Hall sensor is fixed on the signal processing board. Therefore, when the rotor rotates, the permanent magnet rotates synchronously, and a changing magnetic field is generated in the air gap between the permanent magnet and the stator. The ...

AI Technical Summary

Problems solved by technology

Single-pair pole angle value θ due to temperature change 1 with multi-pair polar angle values ​​θ 2 The deviation value has randomness and inconsistency, resulting in a single pair of polar angle values ​​θ 1 with multi-pair polar angle values ​​θ 2 The mapping relationship of changes, resulting in many pairs of polar angle values ​​θ 2 There is an error in the subdivision process, so that after subdivision processing, there are many pairs of polar angle values ​​θ 3 Generate angle value jump point

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