A novel signal process system for angular displacement sensor of time-grating

Wei Wang; Zhaoyao Shi; Donglin Peng

doi:10.1117/12.2511430

7 March 2019 A novel signal process system for angular displacement sensor of time-grating

Wei Wang, Zhaoyao Shi, Donglin Peng

Author Affiliations +

Proceedings Volume 11053, Tenth International Symposium on Precision Engineering Measurements and Instrumentation; 110531P (2019) https://doi.org/10.1117/12.2511430
Event: 10th International Symposium on Precision Engineering Measurements and Instrumentation (ISPEMI 2018), 2018, Kunming, China

Abstract

The angular displacement sensor based on time-grating is a novel kind of displacement sensor, but there is a limitation in some applications with harsh environment owing to extracting angular information uses the analog phase detector. To reduce the error comes from solution and improve the static stability of sensor, a novel signal process system is presented. In comparison to the traditional method using analog electrical technology to obtain angular displacement, the proposed method uses the All phase Fast Fourier transform (AP-FFT), that has a perfect performance on suppressing the spectrum leakage and the property of phase invariant, to obtain the phase angle. In the paper, we design the core system for data sampling and processing. Firstly, it utilizes AP-FFT to transform the sensing signal from time domain to frequency domain; in addition, the angle is calculated in the phase spectrum. Finally, the experimental platform is designed to verify the performance of the proposed technique. The error of the novel method is compared to that of the traditional method, it can be concluded that the proposed method is very effective in suppressing noise and enhances the stability in a static condition.

Citation Download Citation

Wei Wang, Zhaoyao Shi, and Donglin Peng "A novel signal process system for angular displacement sensor of time-grating", Proc. SPIE 11053, Tenth International Symposium on Precision Engineering Measurements and Instrumentation, 110531P (7 March 2019); https://doi.org/10.1117/12.2511430

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KEYWORDS

Sensors

Signal processing

Field programmable gate arrays

Analog electronics

Magnetic sensors

Signal to noise ratio

Interference (communication)

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