摘要
提出了一种基于希尔伯特变换的相位解调算法,并以此构建了新型光纤分布式声波测量系统,在不劣化解调结果的前提下,极大地简化了相位解调光时域反射系统中的光路结构。通过理论与实验,证明了新算法可以正确、稳定地解调外加正弦信号的幅值、频率及位置信息,实现分布式振动信号的准确测量。
A phase demodulation algorithm based on Hilbert transformation is proposed to build a optical fiber distributed acoustic sensing system. This system greatly simplifies the optical structure in the optical time-domain reflectometry system without degrading the demodulation result. It is proved theoretically and experimentally that the new algorithm can accurately and stably demodulate the amplitude, frequency, and position information of the sinusoidal signal provided, which could lead to the accurate measurement of distributed vibration signals.
作者
吕公河
刘雪洁
牟风明
刘小会
LU Gong-he;LIU Xue-jie;MOU Feng-ming;LIU Xiao-hui(Sinopec Geophysical Corporation,Beijing 100020,China;Shengli Branch Sinopec Geophysical Corporation, Dongying 257000,China;Laser Institute,Qilu University of Technology (Shandong Academy of Sciences),Jinan 250103,China)
出处
《山东科学》
CAS
2019年第5期118-123,共6页
Shandong Science
基金
山东省自然科学基金博士基金(ZR2016FB03)
关键词
后向瑞利散射
希尔伯特变换
分布式声波传感
相位解调
Rayleigh backscattering
Hilbert transformation
distributed acoustic sensing
phase demodulation
