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Optical Engineering

Numerical investigation on arbitrary strain distribution sensing with fiber Bragg grating-based Sagnac interferometer and genetic algorithm
Author(s): Hsu-Chih Cheng; Jen-Fa Huang; Yu-Lung Lo
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Paper Abstract

This study presents a numerical investigation into a novel approach for the inverse measurement of arbitrary strain distributions using a genetic algorithm (GA) and a fiber-Bragg-grating-based Sagnac interferometer. In the proposed method, a single uniform fiber Bragg grating (FBG) is bonded to the structure of interest such that it encounters the arbitrary strain field. The arbitrary strain distribution is then determined inversely from the transmission intensity spectrum using a GA population-based optimization process. The major advantage of the proposed approach is its use of a single, uniform FBG to sense arbitrary strain distributions. The approach provides a low-cost and computationally efficient means of detecting strain distributions in many smart-structure monitoring applications.

Paper Details

Date Published: 1 December 2006
PDF: 9 pages
Opt. Eng. 45(12) 124401 doi: 10.1117/1.2404603
Published in: Optical Engineering Volume 45, Issue 12
Show Author Affiliations
Hsu-Chih Cheng, National Cheng Kung Univ. (Taiwan)
Jen-Fa Huang, National Cheng Kung Univ. (Taiwan)
Yu-Lung Lo, National Cheng Kung Univ. (Taiwan)

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