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Proceedings Paper

Condition monitoring of engineering structures with an optical fiber vibration sensor system
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Paper Abstract

This paper presents preliminary work on a vibration monitoring system for assessing the condition of engineering structures or materials. It consists of an intensity-based fiber-optic vibration sensor, a fast Fourier transform pre- processing stage and a back-propagation neural network. The response of the vibration sensor to sinusoidal acceleration is compared with that of a piezoelectric accelerometer. The sensor was fixed to carbon-fiber composite panels and its response to acoustic transients was investigated. Signals from breaking a pencil lead or dropping a ball bearing on the panel were compared. The system was then trained to distinguish between the sensor response to dropping a ball bearing on panels with either real or simulated impact damage. The trained network then identified previously unseen examples of these signals with complete accuracy.

Paper Details

Date Published: 6 June 1997
PDF: 9 pages
Proc. SPIE 3042, Smart Structures and Materials 1997: Smart Sensing, Processing, and Instrumentation, (6 June 1997); doi: 10.1117/12.275750
Show Author Affiliations
Crispin T. M. Doyle, Brunel Univ. (United Kingdom)
Gerard Franklyn Fernando, Brunel Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 3042:
Smart Structures and Materials 1997: Smart Sensing, Processing, and Instrumentation
Richard O. Claus, Editor(s)

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