Real-time structural integrity monitoring using a passive quadrature demodulated, localized Michelson optical fiber interferometer capable of simultaneous strain and acoustic emission sensing
- 1 December 1991
- proceedings article
- Published by SPIE-Intl Soc Optical Eng
- Vol. 1588, 356-367
- https://doi.org/10.1117/12.50188
Abstract
A Michelson Fibre optic sensor (MFOS) is described for in-situ strain and vibration monitoring as well as acoustic emission detection in composite material structures. The phase sensitive fibre optic sensor is localised, all-fibre, and intrinsic. The MFOS was successfully embedded in Keviar/epoxy and graphite/epoxy thermosets as well as graphite/PEEK thermoplastic in order to perform local strain and vibration measurements at the lamina level. A technique allowing acoustic emission detection in parallel with strain and vibration monitoring is illustrated.Keywords
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