Title :
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
fDate :
4/1/2012 12:00:00 AM
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;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2182643
