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Optical Engineering

Transmissive grating-reflective mirror-based fiber optic accelerometer for stable signal acquisition in industrial applications
Author(s): Yeongwan Lee; Chun-Gon Kim; Dae-Hyun Kim
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Paper Abstract

This paper discusses an applicable fiber-optic accelerometer composed of a transmissive grating panel, a reflection mirror, and two optical fibers with a separation of quarter grating pitch as transceivers that monitor the low-frequency accelerations of civil engineering structures. This sensor structure brings together the advantages of both a simple sensor structure, which leads to simplified cable design by 50% in comparison with the conventional transmission-type fiber optic accelerometer, and a stable reflected signals acquisition with repeatability in comparison to the researched grating-reflection type fiber optic accelerometer. The vibrating displacement and sinusoidal acceleration measured from the proposed fiber optic sensor demonstrated good agreement with those of a commercial laser displacement sensor and a MEMS accelerometer without electromagnetic interference. The developed fiber optic accelerometer can be used in frequency ranges below 4.0 Hz with a margin of error that is less than 5% and a high sensitivity of 5.06 rad/(m/s)2.

Paper Details

Date Published: 4 May 2012
PDF: 9 pages
Opt. Eng. 51(5) 054402 doi: 10.1117/1.OE.51.5.054402
Published in: Optical Engineering Volume 51, Issue 5
Show Author Affiliations
Yeongwan Lee, KAIST (Korea, Republic of)
Chun-Gon Kim, KAIST (Korea, Republic of)
Dae-Hyun Kim, Seoul National Univ. of Science and Technology (Korea, Republic of)

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