Circuit and method for improving output precision of incremental coding ABZ in magnetic angle encoder

Abstract

The invention discloses a circuit and a method for improving the output precision of incremental coding ABZ in a magnetic angle encoder. The circuit for improving the output precision of incremental coding ABZ in the magnetic angle encoder comprises an A/D conversion unit, a phase detector, a leading phase estimation unit, an A/B signal edge jump estimation unit and a high-frequency digital clock unit, wherein the input end of the A/D conversion unit is connected with an analog magnetic field intensity signal when a magnet rotates, and the output end of the A/D conversion unit is connected with the phase detector; the phase detector is connected with the leading phase estimation unit and the A/B signal edge jump estimation unit, the leading phase estimation unit is connected with the A/B signal edge jump estimation unit, the output end of the A/B signal edge jump estimation unit outputs A/B signals; and the circuit further improves the accuracy of the A/B signals, reduces the A/B signal jitter caused by the high-speed movement of the magnet and has the better performance in the variable-speed movement of the magnet by combining the leading phase estimation and the determination of an A/B signal edge jump threshold on the basis of the increment A/B signal output principle of a conventional magnetic angle encoder.

Description

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AI Technical Summary

Benefits of technology

This patented technology helps increase the precision with which an encoded image can be displayed accurately when it moves quickly over different surfaces without getting distorted due to vibrations from other components such as motors. It also includes improvements that make this process more efficient than traditional methods like time delaying and averaging multiple images before displaying them together. Overall, these technical benefits help enhance the quality of digital display systems used for creation.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the stability or consistency with fast movement measurements when measuring very quickly moving objects such as vehicles at speeds above 50 mph (miles per second).

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