Multi-antipode magnetoelectric encoder angle fine division method and device based on integer division judgment

Abstract

The invention relates to a multi-antipode magnetoelectric encoder angle fine division method and device based on integer division judgment. The method comprises the steps that a single-antipode Hall sensor and a multi-antipode Hall sensor measure angle value signals, an analog-to-digital converter performs analog-to-digital conversion on the Hall signals, and a single-antipode angle value and a multi-antipode angle value are obtained through a single-antipode angle calculation module and a multi-antipode angle calculation module; a boundary number integral division and current calculation period multi-antipode angle value pole number calculation module is used for determining a current calculation period multi-antipode angle value pole number calculation value; an angle fine division processing module is used for carrying out angle value fine division processing according to the current calculation period multi-antipode angle value pole number calculation value to obtain the final finedivision multi-antipode angle value. According to the method, the problem that the zero crossing point position of the angle value is difficult to accurately judge due to the signal noise of the magnetoelectric encoder can be effectively solved, the accurate judgment of the number of poles of the magnetoelectric encoder with multiple pairs of poles is realized, and the angle fine division is realized.

Description

technical field [0001] The invention belongs to the field of encoder manufacture, and in particular relates to a method and device for precise angle division of a multi-pole magnetoelectric encoder based on integer division judgment. Background technique [0002] Magnetic encoders have the advantages of simple structure, high temperature resistance, oil resistance, impact resistance, small size, and low cost, and have unique advantages in miniaturization and harsh environmental conditions. For example, figure 1 is an exemplary Hall element distribution diagram for a multi-pole magnetoelectric encoder, such as figure 1 As shown, there are 4 Hall elements A+, B+, A-, B-, among which the single pair of Hall elements A+, A- are distributed around the center of the signal processing board at 90° apart. Under the action of single-pole magnetic steel, voltage signals with a phase difference of 90° are generated on the two Hall elements. Among them, the multi-pole Hall B+ and B- ...

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Problems solved by technology

[0004] In response to the above problems, the present invention proposes a solution, which aims to solve the problem that the position of the zero-crossing point of the angle value caused by the signal noise of the magnetoelectric encoder is difficult to accurately judge, realize accurate judgment of the number of poles of the multi-pole magnetoelectric encoder, and realize accurate angle measurement. Minute

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