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The use of fibre Bragg grating sensors for damage detection and location in structural materials

Thursby, G.J. and Betz, D. and Staszewski, W. and Culshaw, B. (2004) The use of fibre Bragg grating sensors for damage detection and location in structural materials. In: 2nd European Workshop on Optical Fibre Sensors, 2004-06-09 - 2004-06-11.

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We describe a novel method of damage location using ultrasonic Lamb waves detected by fibre Bragg gratings. The gratings are configured in a rosette configuration in order that the direction of an incoming wave may be determined. Location of holes was determined by finding the intersect point of the reflected ultrasound signals obtained from two rosettes. Accurate results are obtained when optimum geometries source transducers and fibre gratings are used