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Proceedings Paper

Impact detection and vibration sensing for material composite structures by integrated optic fibre sensors
Author(s): Michel Le Du; M. Labarrere; Rachid Gafsi; Abdelrafik Malki; Pierre Lecoy
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Paper 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.

Paper Details

Date Published: 26 April 1996
PDF: 5 pages
Proc. SPIE 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials, (26 April 1996); doi: 10.1117/12.237117
Show Author Affiliations
Michel Le Du, ENSICA (France)
M. Labarrere, ENSICA (France)
Rachid Gafsi, Ecole Centrale Paris (France)
Abdelrafik Malki, Ecole Centrale Paris (France)
Pierre Lecoy, Ecole Centrale Paris (France)


Published in SPIE Proceedings Vol. 2779:
3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials
Pierre Francois Gobin; Jacques Tatibouet, Editor(s)

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