Développement d'un système de mesure ultrasonore à base de réseaux de Bragg sur fibre optique : application au contrôle santé intégré par ondes élastiques guidées

Arnaud Recoquillay (1) , Nicolas Roussel (1) , Laurent Maurin (1) , Tom Druet (1) , Guillaume Laffont (1) , Bastien Chapuis (1)

1 LSPM (CEA, LIST) - Laboratoire Systèmes et Photonique pour le Monitoring (CEA, LIST)

Optical fiber transducers such as Fiber Bragg Gratings (FBG) are promising solutions for guided waves Structural Health Monitoring (SHM) due to their low intrusivity and their ability to cope with harsh environments (extreme temperatures, radiations, explosive atmospheres…). We present here a solution enabling measurements under varying environmental and operational conditions, which is mandatory for many applications in SHM, the low complexity of the solution ensuring good integration capacities. The effect of the length of the FBG was also studied to enable the optimization of the system sensitivity.

Mots clés: instrumentation; Optical Fiber Sensor; Fiber Bragg Grating; Structural Health Monitoring; intrusivity; extreme environment; sensor; non-destructive testing; Distributed and Quasi-distributed sensing

Domaines: Acoustique [physics.class-ph]; Optique / photonique

Arnaud Recoquillay, Nicolas Roussel, Laurent Maurin, Tom Druet, Guillaume Laffont, et al.. Développement d'un système de mesure ultrasonore à base de réseaux de Bragg sur fibre optique : application au contrôle santé intégré par ondes élastiques guidées. Journées COFREND 2023 - Cofrend Days 2023, Jun 2023, Marseille, France. ⟨cea-04418163⟩