A real-time correction system, method, and chip for a magnetic encoder input sinusoidal signal.

By correcting the sinusoidal signal of the magnetic encoder through hardware circuitry of signal bias detection, peak-to-peak detection, and correction modules, the measurement inaccuracy caused by voltage bias and amplitude fluctuations is solved, improving measurement accuracy and real-time performance. This method is applicable to fields such as new energy vehicles and industrial control.

CN119469234BActive Publication Date: 2026-06-02BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIHANG UNIV
Filing Date
2024-11-18
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Due to factors such as manufacturing process, installation deviation, and environmental factors, the sinusoidal signal output by the magnetic encoder has voltage bias and amplitude fluctuations, which leads to a decrease in measurement accuracy.

Method used

The system employs a signal bias detection module, a signal peak-to-peak detection module, and a signal correction module. Through hardware circuitry, it achieves precise correction of the sinusoidal signal output by the magnetic sensor, including signal bias detection, signal peak-to-peak detection, and signal correction. Combined with the system control module, it provides flexible triggering and correction mode selection.

Benefits of technology

It effectively reduces errors caused by amplitude inconsistency and DC component offset, improves measurement accuracy and real-time response capability, and is suitable for high-precision and high-speed application scenarios.

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Abstract

This invention relates to a real-time correction system, method, and chip for a sinusoidal signal input from a magnetic encoder. In the system, a signal bias detection module detects the offset of the input signal in the DC component and outputs it as a voltage bias value to a signal correction module. A signal peak-to-peak value detection module calculates the peak-to-peak value of the sinusoidal signal and outputs it to the signal correction module. The signal correction module receives the bias value from the signal bias detection module and the peak-to-peak value from the signal peak-to-peak value detection module, removes the DC bias of the signal based on this information, and adjusts it to the required data range through normalization, thereby completing signal correction. A system control module is configured according to user requirements, controls the operating mode of the signal correction system, and outputs the signal correction result. This invention is applicable to reducing angular errors caused by inconsistent amplitudes of quadrature signals output by magnetic sensors and offsets in the DC component of the signal.
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