Distributed Acoustic Sensing With Michelson Interferometer Demodulation  

作　　者：Xiaohui LIU Chen WANG Ying SHANG Chang WANG Wenan ZHAO Gangding PENG Hongzhong WANG 

机构地区：[1]Shandong Key Laboratory of Optical Fiber Sensing Technologies, Laser Institute of Shandong Academy of Sciences, Jinan, Shandong, 250014, China [2]School of Electrical Engineering & Telecommunications, the University of New South Wales, NSW, 2052, Australia

出　　处：《Photonic Sensors》2017年第3期193-198,共6页光子传感器（英文版）

摘　　要：The distributed acoustic sensing （DAS） has been extensively studied and widely used. A distributed acoustic sensing system based on the unbalanced Michelson interferometer with phase generated carrier （PGC） demodulation was designed and tested. The system could directly obtain the phase, amplitude, frequency response, and location information of sound wave at the same time and measurement at all points along the sensing fiber simultaneously. Experiments showed that the system successfully measured the acoustic signals with a phase-pressure sensitivity about -148dB （re rad/μPa） and frequency response ripple less than 1.5 dB. The further field experiment showed that the system could measure signals at all points along the sensing fiber simultaneously.The distributed acoustic sensing （DAS） has been extensively studied and widely used. A distributed acoustic sensing system based on the unbalanced Michelson interferometer with phase generated carrier （PGC） demodulation was designed and tested. The system could directly obtain the phase, amplitude, frequency response, and location information of sound wave at the same time and measurement at all points along the sensing fiber simultaneously. Experiments showed that the system successfully measured the acoustic signals with a phase-pressure sensitivity about -148dB （re rad/μPa） and frequency response ripple less than 1.5 dB. The further field experiment showed that the system could measure signals at all points along the sensing fiber simultaneously.

关 键 词：Distributed acoustic sensing phase generated carrier INTERFEROMETER frequency response 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] U284.151[自动化与计算机技术—控制科学与工程]