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Proceedings Paper

Distributed sensing technique for test article damage detection and monitoring
Author(s): Roger G. Duncan; Brooks A. Childers; Dawn K. Gifford; Don E. Pettit; Andrew W. Hickson; Timothy L. Brown
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Paper Abstract

We report the use of a fiber-optic distributed sensing system to monitor structural fatigue on an aircraft undergoing a full scale fatigue test. This technique involves using optical frequency domain reflectometry to demodulate the reflected signals from multiplexed Bragg gratings that have been photoetched in the core of an optical fiber. The optical fibers, containing a high density of Bragg gratings, were applied along the surface of a Lockheed Martin P-3C Orion fatigue test article to assess the suitability of this technique for long-term structural damage detection and monitoring. Preliminary results indicate good agreement with quasi-collocated foil strain gauges and demonstrate great potential for supplementing or replacing conventional non-destructive evaluation techniques.

Paper Details

Date Published: 22 July 2003
PDF: 9 pages
Proc. SPIE 5050, Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems, (22 July 2003);
Show Author Affiliations
Roger G. Duncan, Luna Innovations, Inc. (United States)
Brooks A. Childers, Luna Innovations, Inc. (United States)
Dawn K. Gifford, Luna Innovations, Inc. (United States)
Don E. Pettit, Lockheed Martin Aeronautics Co. (United States)
Andrew W. Hickson, Lockheed Martin Aeronautics Co. (United States)
Timothy L. Brown, NASA Langley Research Ctr. (United States)

Published in SPIE Proceedings Vol. 5050:
Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems
Daniele Inaudi; Eric Udd, Editor(s)

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