Bi-Dimensional Deflection Estimation by Embedded Fiber Bragg Gratings Sensors

• Main Authors: Pasquale Di Palma, Giovanna Palumbo, Massimo Della Pietra, Vincenzo Canale, Mariagrazia Alviggi, Agostino Iadicicco, Stefania Campopiano
• Format: Article
• Language: English
• Published: MDPI AG 2019-07-01
• Series: Proceedings
• Subjects: deflection monitoring; optical fibers; optical sensors; strain measurement; structural monitoring
• Online Access: https://www.mdpi.com/2504-3900/15/1/3

In this work, we present and discuss on the deflection estimation of a bi-dimensional panel by using Fiber Bragg Gratings (FBGs) as strain sensors embedded in the structure and a method based on the classical beam theory. The existing difficulties in the direct measure of the deflection are overcome thanks to the proposed technique and a real-time indirect structural monitoring is possible both on small and large structure. In many tests the estimated deflection with the proposed method has been compared with direct deflection measurements obtained with a mechanical comparator showing good agreement. A resolution of few tens of microns over a surface of the order of 1 m² has been reached.