Modulation method of air-gap permeance with sinusoidal regularity change for time-grating angular displacement sensor

Min Liang; Yangyang Wang; Tianheng Zhang; Donglin Peng

doi:10.1117/12.2612021

19 November 2021 Modulation method of air-gap permeance with sinusoidal regularity change for time-grating angular displacement sensor

Min Liang, Yangyang Wang, Tianheng Zhang, Donglin Peng

Author Affiliations +

Proceedings Volume 12059, Tenth International Symposium on Precision Mechanical Measurements; 120590Z (2021) https://doi.org/10.1117/12.2612021
Event: Tenth International Symposium on Precision Mechanical Measurements, 2021, Qingdao, China

Abstract

The signal of the inductive type time-grating angular displacement sensor is essentially a triangular wave which is similar to a sine wave and contains various harmonic components. How to suppress the harmonic components of each frequency and improve the sinusoidal properties of the sensor signal is an important way to improve the measurement accuracy of the sensor. This paper proposes a modulation method for the sine regular change of the air-gap permeance of the sensor, and the basic model of the sensor is established. Two sensor models with different structural parameters are proposed, and the corresponding simulation and error analysis are carried out. The results show that the measurement error of the f2(θ) type sensor is ±25" in the range of 0°-6°. The sensor designed based on the method presented in this paper has an excellent effect on the sinusoidal enhancement of the signal and the suppression of the error component. It has an important significance for the design of the time-grating angular displacement sensor.

Citation Download Citation

Min Liang, Yangyang Wang, Tianheng Zhang, and Donglin Peng "Modulation method of air-gap permeance with sinusoidal regularity change for time-grating angular displacement sensor", Proc. SPIE 12059, Tenth International Symposium on Precision Mechanical Measurements, 120590Z (19 November 2021); https://doi.org/10.1117/12.2612021

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