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Optical Engineering

Dual-fiber-Bragg gratings accelerometer for the detection of geosound caused by debris flow
Author(s): Xinying Han; Hongqiao Wen; Sheng Liu; Yuchuan Xiong; Zhihui Luo
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Paper Abstract

The cantilever-beam accelerometer based on dual-fiber-Bragg gratings (FBGs) is proposed to detect the geosound caused by debris flow. The structure and working principle of the accelerometer are demonstrated. Dual FBGs are introduced to improve the sensitivity and frequency response of the accelerometer. By using a bend insensitive optical fiber and ultrathin coating, the sensitivity and serial multiplexing performance of the sensor are improved remarkably. Experimental results show that the accelerometer, with a sensitivity of 900    pm / g and the natural frequency of 280 Hz, can effectively detect the geosound caused by debris flow.

Paper Details

Date Published: 10 May 2017
PDF: 4 pages
Opt. Eng. 56(5) 056104 doi: 10.1117/1.OE.56.5.056104
Published in: Optical Engineering Volume 56, Issue 5
Show Author Affiliations
Xinying Han, Wuhan Univ. of Technology (China)
Hongqiao Wen, Wuhan Univ. of Technology (China)
Sheng Liu, Wuhan Univ. of Technology (China)
Yuchuan Xiong, Wuhan Univ. of Technology (China)
Zhihui Luo, Wuhan Univ. of Technology (China)

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