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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 11 — Apr. 10, 2013
  • pp: 2346–2352

Wavelet packet energy characterization of low velocity impacts and load localization by optical fiber Bragg grating sensor technique

Jiyun Lu, Bangfeng Wang, and Dakai Liang  »View Author Affiliations


Applied Optics, Vol. 52, Issue 11, pp. 2346-2352 (2013)
http://dx.doi.org/10.1364/AO.52.002346


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Abstract

The low velocity impacts (LVIs) monitoring based on optical fiber Bragg grating (FBG) sensors have attracted more attention in recent years. The center wavelength migrations of FBG sensors were determined by strain and residual strain during and after LVI on composite material structure. We presented a method to discriminate the energy characters of LVI response signals related to LVI locations. By analyzing the wavelet packet energy spectra of LVI response signals monitored by FBG sensors, the sixth node’s energy was found to be sensitive to LVI location. Thus, the sixth node’s energies as LVI feature values, were used to predict the LVI locations by the method of support vector regression (SVR). By optimization of the SVR models’ free parameters, predicting accuracy was 4.62% in the work.

© 2013 Optical Society of America

OCIS Codes
(040.1880) Detectors : Detection
(050.2770) Diffraction and gratings : Gratings
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2370) Fiber optics and optical communications : Fiber optics sensors

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: December 17, 2012
Revised Manuscript: March 1, 2013
Manuscript Accepted: March 5, 2013
Published: April 8, 2013

Citation
Jiyun Lu, Bangfeng Wang, and Dakai Liang, "Wavelet packet energy characterization of low velocity impacts and load localization by optical fiber Bragg grating sensor technique," Appl. Opt. 52, 2346-2352 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-11-2346


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