摘要
文中提出了一种光纤分布式声波传感方案。作用在传感光纤上的声波信号导致后向瑞利散射光的相位变化,将含有声波信息的后向瑞利散射信号注入到迈克尔逊干涉仪,并采用相位载波解调算法解调出相位信息。实验中采用压电拉伸器模拟声波振动,分布式声波传感系统实现了10 m的空间分辨率以及平坦的频响。
A distributed acoustic sensing （DAS） scheme was presented. Rayleigh backscattered light which contained acoustic signal induced phase changes along the sensing fiber was fed into a Michelson interferometer, the phase changes were demodulated by the Phase Generated Cartier technology. A piezoelectric simulation experiment of acoustic vibration was designed. The DAS system realized 10 m location resolution of the acoustic source, and the flat frequency response through the experiment.
作者
尚盈
王晨
刘小会
王昌
赵文安
彭刚定
Shang Ying Wang Chen Liu Xiaohui Wang Chang Zhao Wen＇an Peng Gangding(Shandong Key Laboratory of Optical Fiber Sensing Technologies, Laser Institute of Shandong Academy of Sciences, Jinan 250014, China School of Electrical Engineering ＆ Telecommunications, University of New South Wales, NSW 2052, Australia)
出处
《红外与激光工程》
EI
CSCD
北大核心
2017年第3期173-177,共5页
Infrared and Laser Engineering
基金
国家自然科学基金(61605101)
山东省重点研发计划项目(2015GSF120001)
山东省重点研发计划项目(2014GGX103019)
关键词
分布式声波传感
相位载波
干涉仪
频响
distributed acoustic sensing
phase generated carder
interferometer
frequency response
