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Proceedings Paper

New optical fibre coating meant for embedding distributed sensors into concrete
Author(s): Sylvie Delepine-Lesoille; Erick Merliot; Marie Delaveau; Alain Courteville; Lionel Quetel
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Paper Abstract

This paper reports on the design and realization of a new optical fibre sensor body meant for embedding distributed optical fibre sensors into concrete. We have carried out a finite element analysis which shows that the proposed wave-like sensor enables continuous bonding between optical fibre and concrete, symmetrical response in traction and compression whatever the contact conditions may be. The stiffness of the optical fibre can so be adapted to the concrete, which reduces strain concentrations and need for a theoretical calibration factor. Experimental validations are carried out, showing that despite its wave-shape, the proposed sensor body does not introduce any losses or strain that would result from fibre macrobendings. The process of realization is very cheap, thus dedicated to distributed sensors. We have realized optical fibre extensometers based on this technique and on low-coherence interferometry method for the measurements, including an original approach of thermal effect compensation. Preliminary results are very encouraging.

Paper Details

Date Published: 23 May 2005
PDF: 4 pages
Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.623600
Show Author Affiliations
Sylvie Delepine-Lesoille, Lab. Central des Ponts et Chaussees (France)
Erick Merliot, Lab. Central des Ponts et Chaussees (France)
Marie Delaveau, Fogale-Nanotech (France)
Alain Courteville, Fogale-Nanotech (France)
Lionel Quetel, IDIL Fibres Optiques (France)


Published in SPIE Proceedings Vol. 5855:
17th International Conference on Optical Fibre Sensors

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