Impact detection and vibration sensing for material composite structures by integrated optic fibre sensors

Michel Le Du; M. Labarrere; Rachid Gafsi; Abdelrafik Malki; Pierre Lecoy

doi:10.1117/12.237117

26 April 1996 Impact detection and vibration sensing for material composite structures by integrated optic fibre sensors

Michel Le Du, M. Labarrere, Rachid Gafsi, Abdelrafik Malki, Pierre Lecoy

Author Affiliations +

Proceedings Volume 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials; (1996) https://doi.org/10.1117/12.237117
Event: 3rd International Conference on Intelligent Materials, 1996, Lyon, France

Abstract

An optic fiber sensor based on the intermodal interference principle was integrated in a composite material structure to detect impacts and vibrations. Six fibers were integrated at the top of a carbon/epoxy composite panel and arranged to form a regular network on the structure. A series of impacts at various positions on the plate were performed using an instrumented hammer. The spectral responses of the optic sensors were compared to a reference piezoelectric accelerometer. Moreover a determination of the impacts position was performed with the arrival times measure of the generated acoustic wave front to the optic sensors. These tests proved the great sensitivity of this type of sensor, its integration easiness and the possibility to localize an impact on composite structures with a very simple device.

Citation Download Citation

Michel Le Du, M. Labarrere, Rachid Gafsi, Abdelrafik Malki, and Pierre Lecoy "Impact detection and vibration sensing for material composite structures by integrated optic fibre sensors", Proc. SPIE 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials, (26 April 1996); https://doi.org/10.1117/12.237117

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