红外与激光工程, 2017, 46 (3): 0321003, 网络出版: 2017-06-27
基于相位光时域反射的光纤分布式声波传感研究
Optical distributed acoustic sensing based on the phase optical time-domain reflectometry
分布式声波传感 相位载波 干涉仪 频响 distributed acoustic sensing phase generated carrier interferometer frequency response
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。
Abstract
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 Carrier 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.
尚盈, 王晨, 刘小会, 王昌, 赵文安, 彭刚定. 基于相位光时域反射的光纤分布式声波传感研究[J]. 红外与激光工程, 2017, 46(3): 0321003. Shang Ying, Wang Chen, Liu Xiaohui, Wang Chang, Zhao Wen′an, Peng Gangding. Optical distributed acoustic sensing based on the phase optical time-domain reflectometry[J]. Infrared and Laser Engineering, 2017, 46(3): 0321003.
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