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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 18 — Aug. 27, 2012
  • pp: 20459–20465

Continuous wavelet transform for non-stationary vibration detection with phase-OTDR

Zengguang Qin, Liang Chen, and Xiaoyi Bao  »View Author Affiliations

Optics Express, Vol. 20, Issue 18, pp. 20459-20465 (2012)

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We propose the continuous wavelet transform for non-stationary vibration measurement by distributed vibration sensor based on phase optical time-domain reflectometry (OTDR). The continuous wavelet transform approach can give simultaneously the frequency and time information of the vibration event. Frequency evolution is obtained by the wavelet ridge detection method from the scalogram of the continuous wavelet transform. In addition, a novel signal processing algorithm based on the global wavelet spectrum is used to determine the location of vibration. Distributed vibration measurements of 500Hz and 500Hz to 1kHz sweep events over 20 cm fiber length are demonstrated using a single mode fiber.

© 2012 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(100.7410) Image processing : Wavelets
(290.5870) Scattering : Scattering, Rayleigh

ToC Category:

Original Manuscript: May 25, 2012
Revised Manuscript: August 15, 2012
Manuscript Accepted: August 17, 2012
Published: August 21, 2012

Zengguang Qin, Liang Chen, and Xiaoyi Bao, "Continuous wavelet transform for non-stationary vibration detection with phase-OTDR," Opt. Express 20, 20459-20465 (2012)

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