基于希尔伯特变换的光纤分布式声波测量技术

doi:10.3976/j.issn.1002-4026.2019.05.015

山东科学 ›› 2019, Vol. 32 ›› Issue (5): 118-123.doi: 10.3976/j.issn.1002-4026.2019.05.015

基于希尔伯特变换的光纤分布式声波测量技术

吕公河¹，刘雪洁²，牟风明²，刘小会^3*

1.中石化石油工程地球物理公司，北京 100020；2.中石化石油工程地球物理公司胜利分公司，山东东营 257000；3. 齐鲁工业大学（山东省科学院），山东省科学院激光研究所，山东济南 250103

收稿日期:2018-11-22 出版日期:2019-10-20 发布日期:2019-10-09
通信作者: 刘小会（1976—），男，硕士，副研究员，研究方向为光纤传感技术及应用。E-mail:windnuaa@126.com
作者简介:吕公河（1963—），男，博士，研究方向为石油物探采集方法。E-mail: chimaera2000@163.com
基金资助:
山东省自然科学基金博士基金 (ZR2016FB03)

Optical fiber distributed acoustic sensing technology based on Hilbert transformation

LÜ Gong-he¹, LIU Xue-jie², MOU Feng-ming², LIU Xiao-hui^3*

1.Sinopec Geophysical Corporation， Beijing 100020，China; 2. Shengli Branch Sinopec Geophysical Corporation，Dongying 257000，China; 3. Laser Institute，Qilu University of Technology（Shandong Academy of Sciences）, Jinan 250103，China

Received:2018-11-22 Online:2019-10-20 Published:2019-10-09

摘要/Abstract

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。

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

Abstract: 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.

Key words: Rayleigh backscattering, Hilbert transformation;distributed acoustic sensing, phase demodulation

中图分类号:

TP394.1

吕公河, 刘雪洁, 牟风明, 刘小会. 基于希尔伯特变换的光纤分布式声波测量技术[J]. 山东科学, 2019, 32(5): 118-123.

LÜ Gong-he, LIU Xue-jie, MOU Feng-ming, LIU Xiao-hui. Optical fiber distributed acoustic sensing technology based on Hilbert transformation[J]. Shandong Science, 2019, 32(5): 118-123.

参考文献 12

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基于希尔伯特变换的光纤分布式声波测量技术

Optical fiber distributed acoustic sensing technology based on Hilbert transformation

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