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

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

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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

Abstract

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

CLC Number:

TP394.1

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.

References 12

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Optical fiber distributed acoustic sensing technology based on Hilbert transformation

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