A High Sensitive Micro-Seismic Fiber Bragg Grating(FBG) Sensor System

摘要：

A high sensitive micro-seismic fiber Bragg grating (FBG) sensor system based on narrow line width distributed feedback (DFB) laser is realized by using filtering demodulation. Sensitivity of micro-seismic FBG sensor lies on the structure of the sensor shell and the shape of the reflectivity spectrum of FBG. Experiments on the sensor systems frequency character have been done. Results show that this sensor has the smallest acceleration of 1mm/s2. The experiments on coal mine exhibit that the sensor can be used to measure micro-seismic sigmals. So the FBG sensor is feasible to have practical use to measure micro-seismic signals because the sensor has high sensitivity and is easy to be fabricated, it has good low frequency response and the interrogation system is simple, low cost.

关键词： FBG DFB laser interrogation micro-seismic acceleration sensor modulation

作者: Jin-Yu Wang Guang-Dong Song Xiao-Hui Liu Chang Wang Tong-Yu Liu

作者单位: Key Laboratory of Optical Fiber Sensoring Technology of Shandong Province, Jinan, 250014, China Lase Key Laboratory of Optical Fiber Sensoring Technology of Shandong Province, Jinan, 250014, China Lase

会议类型: 国际会议

会议名称: The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)

会议地点: 北京

会议语种:英文

页码: 793-799

在线出版日期: 2011-10-27（万方平台首次上网日期，不代表论文的发表时间）