G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 11/16 (2006.01) G01D 11/24 (2006.01)
Patent
CA 2514802
The invention relates to an extensometer comprising a flexible sensing element and Bragg gratings. The inventive extensometer, which is intended to measure deformations in a host material, is particularly suitable for monitoring concrete structures. The invention comprises at least one sensing element (18) which is subjected to linear bending and at least one Bragg grating (14) which is formed in an optical fibre (16) and which is fixed to the aforementioned sensing element. In this way, any deformation in the host material is transmitted to the grating by means of the sensing element. The extensometer also comprises mechanical means (20, 22) which transform a deformation in the material into a sensing element bending motion which deforms the grating.
Extensomètre à corps d'épreuve flexible et réseaux de Bragg. Cet extensomètre, qui s'applique notamment à la surveillance de structures en béton, est destiné à mesurer les déformations d'un matériau hôte et comprend au moins un corps d'épreuve (18) sollicité linéairement en flexion et au moins un réseau de Bragg (14), formé dans une fibre optique (16) et fixé au corps d'épreuve. Toute déformation du matériau hôte est transmise au réseau par l'intermédiaire du corps d'épreuve. L'extensomètre comprend aussi des moyens mécaniques (20, 22) qui transforment une déformation du matériau en une flexion du corps d'épreuve, qui déforme le réseau.
Ferdinand Pierre
Rougeault Stephane
Commissariat A. L'energie Atomique
Goudreau Gage Dubuc
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