Inverse Algorithms for the GPR Assessment of Concrete Structures

Xisto Lucas Travassos (1) , Douglas A. G. Vieira (2) , Nathan Ida (3) , Christian Vollaire (1) , Alain Nicolas (1)

1 AMPERE - Ampère
2 DEE - UFMG - Departamento de Engenharia Elétrica [Minas Gerais]
3 Department of Electrical and Computer Engineering [Akron]

This paper investigates the characterization of inclusions in concrete structures, including the number of inclusions, their geometries, and electromagnetic properties. To solve this problem, a two phase algorithm that combines matched-filter-based reverse-time (MFBRT) migration algorithm with the particle swarm optimization (PSO) is employed. The first phase runs the MFBRT that can, robustly, define the number of inclusions and their centers; however, it cannot define the inclusion geometry and electromagnetic properties. Given the results obtained in the first phase, the PSO is launched in the second phase, in a parametric approach, to define the radii of the inclusions and their properties. Three types of inclusions were considered, water, air, and conductor. Results considering a nonhomogenous host medium having from one to three inclusions are presented showing the effectiveness of the proposed approach.

Mots clés: Finite-difference time domain (FDTD); inverse scattering; migration algorithms; particle swarm optimization

Domaines: Energie électrique

Xisto Lucas Travassos, Douglas A. G. Vieira, Nathan Ida, Christian Vollaire, Alain Nicolas. Inverse Algorithms for the GPR Assessment of Concrete Structures. IEEE Transactions on Magnetics, 2008, 44 (6), pp.994-997. ⟨10.1109/TMAG.2007.916661⟩. ⟨hal-00358856⟩