Dynamic Distance Measurement Based on a Fast Frequency-Swept Interferometry

Yuru Chen; Xiaohua Lei; Lin Xiao; Peng Zhang; Xianming Liu

doi:10.3390/s22134771

Sensors (Jun 2022)

Dynamic Distance Measurement Based on a Fast Frequency-Swept Interferometry

Yuru Chen,
Xiaohua Lei,
Lin Xiao,
Peng Zhang,
Xianming Liu

Affiliations

Yuru Chen: The Key Lab of Optoelectronic Technology & Systems Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China
Xiaohua Lei: The Key Lab of Optoelectronic Technology & Systems Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China
Lin Xiao: The Key Lab of Optoelectronic Technology & Systems Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China
Peng Zhang: The Key Lab of Optoelectronic Technology & Systems Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China
Xianming Liu: The Key Lab of Optoelectronic Technology & Systems Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China

DOI: https://doi.org/10.3390/s22134771
Journal volume & issue: Vol. 22, no. 13
p. 4771

Abstract

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To improve the precision of dynamic distance measurement based on the frequency-swept interferometry (FSI) system, a Doppler-induced error compensation model based on a scheme increasing the frequency sweeping rate is proposed. A distance demodulation method based on a Fourier transformation is investigated when the defined quasi-stationary coefficient approaches a constant. Simulations and experiments based on dynamic distance with a sinusoidal change demonstrate that the proposed method has a standard deviation of 0.09 μm within a distance range of 4 μm at a sweeping rate of 60 KHz.

Published in Sensors

ISSN: 1424-8220 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology
Website: http://www.mdpi.com/journal/sensors

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