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Proceedings Article

Distributed Bragg grating sensing technique for test article damage detection and monitoring

[+] Author Affiliations
Roger G. Duncan, Brooks A. Childers, Dawn K. Gifford

Luna Innovations, Inc. (USA)

Don E. Pettit, Andrew W. Hickson

Lockheed Martin Aeronautics Co. (USA)

Timothy L. Brown

NASA Langley Research Ctr. (USA)

Proc. SPIE 5050, Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems, 367 (July 25, 2003); doi:10.1117/12.512546
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From Conference Volume 5050

  • Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems
  • Daniele Inaudi; Eric Udd
  • San Diego, CA | March 02, 2003

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.

© (2003) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Roger G. Duncan ; Brooks A. Childers ; Dawn K. Gifford ; Don E. Pettit ; Andrew W. Hickson, et al.
"Distributed Bragg grating sensing technique for test article damage detection and monitoring", Proc. SPIE 5050, Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems, 367 (July 25, 2003); doi:10.1117/12.512546; http://dx.doi.org/10.1117/12.512546


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