A precision edge filter interrogation system for mine fiber Bragg grating micro-seismic sensors

摘要：

　　The edge filter approach is applicable to interrogating mine fiber Bragg grating (FBG) micro-seismic sensors.This paper presents the design and implementation of a precision edge filter interrogation system using digital signal processing DSP).The technical details including automatic gain trans-impedance amplifier, low-noise drive circuit, and working point control unit are introduced.The results show that the system achieves a low-limit frequency of 0.5 Hz and a working-point control accuracy of 0.1%.The peak power consumption reduces to ~3 W while the channel density is doubled.And it is expected to be used in underground fiber optic micro-seismic station.

关键词： micro-seismic monitoring FBG accelerometer edge filter interrogation digital signal processing

作者: Binxin Hu Jinyu Wang Guangdong Song Tongyu Liu

作者单位: Shandong Provincial Key Laboratory of Optical Fiber Sensing Technologies, Laser Institute of Shandong Academy of Sciences, Jinan, Shandong, 250014, China

会议类型: 国内会议

会议名称: 光纤和光电子传感器及其安全应用国际会议(OFSIS2015)

会议地点: 济南

会议语种:英文

页码: 37-41

在线出版日期: 2015-01-20（万方平台首次上网日期，不代表论文的发表时间）