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

Crispin T. M. Doyle; Gerard Franklyn Fernando

doi:10.1117/12.275750

6 June 1997 Condition monitoring of engineering structures with an optical fiber vibration sensor system

Crispin T. M. Doyle, Gerard Franklyn Fernando

Proceedings Volume 3042, Smart Structures and Materials 1997: Smart Sensing, Processing, and Instrumentation; (1997) https://doi.org/10.1117/12.275750
Event: Smart Structures and Materials '97, 1997, San Diego, CA, United States

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.

Citation Download Citation

Crispin T. M. Doyle and Gerard Franklyn Fernando "Condition monitoring of engineering structures with an optical fiber vibration sensor system", Proc. SPIE 3042, Smart Structures and Materials 1997: Smart Sensing, Processing, and Instrumentation, (6 June 1997); https://doi.org/10.1117/12.275750

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