G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 11/16 (2006.01) G01L 1/24 (2006.01) G01M 11/08 (2006.01)
Patent
CA 2402675
The invention concerns a device comprising at least a transducer (1) in the form of a matrix wherein is embedded an optical fibre segment (7) provided with means designed to modify light transmission in accordance to a stress to be measured. One input end of said optical fibre (7) is designed to be connected to an optical transmitter (8) and one output end to an optical detector (9). The transducer (1) is elongated in shape, longitudinally run through by said optical fibre segment (7). A median section (2) is designed to be subjected to stresses to be measured, its two ends being respectively secured to two portions transmitting stresses (3, 4) to said median section (2), arranged to be attached to the structure to be measured. Said matrix is made of a composite material reinforced with filaments to provide the transducer (1) with a modulus of elasticity close to that of the structure to be measured.
Ce dispositif, comprend au moins un transducteur (1) sous forme de matrice dans lequel un segment de fibre optique (7) muni de moyens aptes à modifier la transmission de lumière en fonction d'une contrainte à mesurer est noyé. Une extrémité d'entrée de cette fibre optique (7) est destinée à être reliée à un photoémetteur (8) et une extrémité de sortie à un photorécepteur (9). Le transducteur (1) est de forme allongée, traversé longitudinalement par ledit segment de fibre optique (7). Un tronçon médian (2) est destiné à être soumis aux contraintes à mesurer, ses deux extrémités étant solidaires respectivement de deux parties de transmission des contraintes (3, 4) audit tronçon médian (2), agencées pour être rendues solidaires de la structure à mesurer. Ladite matrice est en un matériau composite renforcé de filaments pour donner audit transducteur (1) un module d'élasticité voisin de celui de la structure à mesurer.
Kanellopoulos Vasilios
Kotrotsios George
Ricard Jean-Francois
Fiber Optic Sensors-Fos Sa
Robic
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