Detection method used for improving counting precision of orthogonal coding angle sensor

Abstract

The invention discloses a detection method used for improving counting precision of an orthogonal coding angle sensor. By monitoring a level logical relationship of orthogonal pulse signals A and B, comparing with orthogonal pulse signal counting rules and judging, when the level logical relationship of the orthogonal pulse signals A and B accords with the orthogonal pulse signal counting rules, acount pulse is accumulated; and when the level logical relationship of the orthogonal pulse signals A and B does not accord with the orthogonal pulse signal counting rules, the count pulse is maintained to be unchanged. The detection method disclosed by the invention effectively reduces an error produced in a counting process, so that the counting precision of the orthogonal coding angle sensor is improved.

Description

technical field [0001] The invention relates to the field of counting by an orthogonal encoding rotational angle sensor, in particular to a detection method for improving the counting accuracy of an orthogonal encoding rotational angle sensor. Background technique [0002] Orthogonal encoding angle sensor is a typical encoding form, which has good anti-noise performance, can effectively eliminate the interference caused by pulse edge oscillation, and can effectively improve the accuracy of measurement, so it is widely used in many fields. The situation is complex and changeable, and there are many interference factors, so the orthogonal encoder sensor cannot fully meet the needs of high-precision technology in today's era. [0003] The traditional counting method of the quadrature encoder angle sensor generally chooses to monitor the two-way level signals at the rising edge or falling edge of the single-chip clock, and can only count once within a complete pulse signal, so w...

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Problems solved by technology

[0002] Orthogonal encoding angle sensor is a typical encoding form, which has good anti-noise performance, can effectively eliminate the interference caused by pulse edge oscillation, and can effectively improve the accuracy of measurement, so it is widely used in many fields. The situation is complex and changeable, and there are many interference factors, so the orthogonal encoder sensor cannot fully meet the needs of high-precision technology in today's era.

[0003] The traditional counting method of the quadrature encoder angle sensor generally chooses to monitor the two-way level signals at the rising edge or falling edge of the single-chip clock, and can only count once within a complete pulse signal, so when the detection target works quickly or When working in reverse, the quadrature encoder sensor may produce burrs, electromagnetic interference, etc., which will cause pulse signal loss, over-counting, etc.

For example, when the steering wheel rotates or changes direction quickly, the pulse loss of the angle pulse acquisition is mainly caused by the spikes of the steering wheel angle sensor when the steering wheel rotates too fast, electromagnetic interference, etc.

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