Wavelet Denoising Method for Improving Detection Performance of Distributed Vibration Sensor

Author

Qin, Zengguang ; Chen, Liang ; Bao, Xiaoyi

Author_Institution

Dept. of Phys., Univ. of Ottawa, Ottawa, ON, Canada

Volume

24

Issue

7

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

542

Lastpage

544

Abstract

This letter proposed and demonstrated a wavelet technique to reduce the time domain noise to get submeter spatial resolution in the distributed vibration sensor based on phase optical time domain reflectometry. A new wavelet shrinkage approach allows the distributed vibration measurement of 20-Hz and 8-kHz events to be detected over 1-km sensing length with a 5-ns optical pulse, which is equivalent to 50-cm spatial resolution using the single-mode sensing fiber.

Keywords

distributed sensors; fibre optic sensors; reflectometry; vibration measurement; distance 1 km; distributed vibration measurement; distributed vibration sensor; frequency 20 Hz; frequency 8 kHz; phase optical time domain reflectometry; single-mode sensing fiber; spatial resolution; time 5 ns; time domain noise; wavelet denoising method; wavelet shrinkage; wavelet technique; Discrete wavelet transforms; Optical fiber polarization; Optical fiber sensors; Signal to noise ratio; Vibrations; Distributed optical fiber sensor; phase-sensitive optical time-domain reflectometry (OTDR); vibration; wavelet denoising;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2182643

Filename

6122053