Dual-fiber-Bragg gratings accelerometer for the detection of geosound caused by debris flow

被引：6

作者：

Han, Xinying ^{[1
]}

Wen, Hongqiao ^{[1
]}

Liu, Sheng ^{[1
]}

Xiong, Yuchuan ^{[1
]}

Luo, Zhihui ^{[1
]}

机构：

[1] Wuhan Univ Technol, Natl Engn Lab Opt Fiber Sensing Technol, Wuhan, Peoples R China

来源：

OPTICAL ENGINEERING | 2017年 / 56卷 / 05期

关键词：

accelerometer; dual-fiber-Bragg gratings; geosound of debris flow; SENSOR;

D O I：

10.1117/1.OE.56.5.056104

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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. (C) 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)

引用

页数：4

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