Microwave Non‐Destructive Testing of Non‐Dispersive and Dispersive Media Using High‐Resolution Methods

Cédric Le Bastard (1) , Khaled Chahine (2) , Yide Wang (3) , Vincent Baltazart (4) , Nicolas Pinel (5) , Christophe Bourlier (3) , Xavier Derobert (4)

1 ENDSUM - Evaluation non destructive des structures et des matériaux
2 LIU - Lebanese International University
3 IETR - Institut d'Électronique et des Technologies du numéRique
4 IFSTTAR - Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux
5 ALYOTECH TS&I

This chapter discusses the principle and application of two model‐based algorithms for processing non‐dispersive and dispersive ground penetrating radar (GPR) data over layered medium under monostatic antenna configuration. Both algorithms have been selected for their super‐time resolution capability and reduced computational burden; they allow GPR to measure a layer thickness smaller than the fraction of the dominant wavelength. For non‐dispersive data, the ESPRIT algorithm is generalized to handle different kinds of data models encountered in experiments and in the literature. For dispersive data, the proposed adaptation of the MPM algorithm allows recovering the full‐time resolution and jointly estimating the time delays and quality factors of a layered medium with reduced bias. Both processing techniques are applied to probe‐layered roadways for NDT&E purposes.

Mots clés: ground penetrating radar; high‐resolution signal processing methods; non‐dispersive media; dispersive media; civil engineering

Domaines: Sciences de l'ingénieur [physics]

Cédric Le Bastard, Khaled Chahine, Yide Wang, Vincent Baltazart, Nicolas Pinel, et al.. Microwave Non‐Destructive Testing of Non‐Dispersive and Dispersive Media Using High‐Resolution Methods. Non-Destructive Testing, INTECH open access, chapitre 9, 2016, 978-953-51-2502-0. ⟨10.5772/62410⟩. ⟨hal-01362215⟩