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Sensors 2016, 16(6), 808; doi:10.3390/s16060808

An Optical Fiber Lateral Displacement Measurement Method and Experiments Based on Reflective Grating Panel

Department of Precision Instruments, Tsinghua University, State Key Laboratory of Precision Measurement Technology and Instruments, Beijing 100084, China
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Author to whom correspondence should be addressed.
Academic Editor: Jose Miguel Lopez-Higuera
Received: 10 March 2016 / Revised: 25 May 2016 / Accepted: 30 May 2016 / Published: 2 June 2016
(This article belongs to the Special Issue Optical Fiber Sensors 2016)
View Full-Text   |   Download PDF [7670 KB, uploaded 2 June 2016]   |  

Abstract

An optical fiber sensing method based on a reflective grating panel is demonstrated for lateral displacement measurement. The reflective panel is a homemade grating with a periodic variation of its refractive index, which is used to modulate the reflected light intensity. The system structure and operation principle are illustrated in detail. The intensity calculation and simulation of the optical path are carried out to theoretically analyze the measurement performance. A distinctive fiber optic grating ruler with a special fiber optic measuring probe and reflective grating panel is set up. Experiments with different grating pitches are conducted, and long-distance measurements are executed to accomplish the functions of counting optical signals, subdivision, and discerning direction. Experimental results show that the proposed measurement method can be used to detect lateral displacement, especially for applications in working environments with high temperatures. View Full-Text
Keywords: fiber optic sensing; lateral displacement measurement; reflective grating panel fiber optic sensing; lateral displacement measurement; reflective grating panel
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Li, Y.; Guan, K.; Hu, Z.; Chen, Y. An Optical Fiber Lateral Displacement Measurement Method and Experiments Based on Reflective Grating Panel. Sensors 2016, 16, 808.

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