A joint thermal and electromagnetic diagnostics approach for the inspection of thick walls

Nicolas Le Touz (1, 2) , Jean Dumoulin (2, 1) , Gianluca Gennarelli (3) , Francesco Soldovieri (3)

1 IFSTTAR/COSYS/SII - Structure et Instrumentation Intégrée
2 I4S - Statistical Inference for Structural Health Monitoring
3 IREA-CNR - Istituto per il Rilevamento Elettromagnetico dell'Ambiente [Napoli]

In this study, we present an inversion approach to detect and localize inclusions in thick walls under natural so-licitations. The approach is based on a preliminary analysis of surface temperature field evolution with time (for instance acquired by infrared thermography); subsequently, this analysis is improved by taking advantage of a priori information provided by ground-penetrating radar reconstruction of the structure under investigation. In this way, it is possible to improve the accuracy of the images achievable with the stand-alone thermal reconstruction method in the case of quasi-periodic natural excitation.

Domaines: Mécanique des structures [physics.class-ph]; Sciences de l'ingénieur [physics]

Nicolas Le Touz, Jean Dumoulin, Gianluca Gennarelli, Francesco Soldovieri. A joint thermal and electromagnetic diagnostics approach for the inspection of thick walls. Geoscientific Instrumentation, Methods and Data Systems Discussions, 2017, 6 (1), pp.81 - 92. ⟨10.5194/gi-6-81-2017⟩. ⟨hal-01563859⟩