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Proceedings Paper

Etched fiber optic sensing network in smart composite structures and its signal processing technology
Author(s): Dexiu Huang; Jiangliang Yang
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Paper Abstract

A three dimension sensing network, which is composed of periodically etched multi-mode optical fibers, is embedded in the laminated composite material structure of vertical tail-wing of plane for nondestructive evaluation of structural states in smart composite material and structures. The composite specimens in which sensing network is embedded are tested with stretching, bending and impacting. It is exhibited in the experiment that the responses of fiberoptic sensor are linear, repeatable, have a high sensitivity and no measurable hysteresis. The experimental results have shown the feasibility of embedded fiberoptic sensor network to be used to measure the structural states such as strain, stress and damage. The signal processing for the parallel and distributing fiberoptic sensing network by using artificial neural network is also described. In this paper, the BP network which is suitable for distributing sensing signal processing is studied, and the simulation has demonstrated that the BP network's ability for identifying the position of stress, strain and damage is above 90%.

Paper Details

Date Published: 23 February 2001
PDF: 5 pages
Proc. SPIE 4357, Distributed Fiber Optical Sensors and Measuring Networks, (23 February 2001); doi: 10.1117/12.417872
Show Author Affiliations
Dexiu Huang, Huazhong Univ. of Science and Technology (China)
Jiangliang Yang, Tsinghua Univ. (Singapore)

Published in SPIE Proceedings Vol. 4357:
Distributed Fiber Optical Sensors and Measuring Networks
Yuri N. Kulchin, Editor(s)

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