Eddy-current evaluation of 3-D defects in a metal plate

Abstract : The retrieval of voluminous defects in a non-magnetic metal plate from maps of time-harmonic anomalous magnetic fields in air due to a nearby low-frequency source is considered. The wavefield is modelled from a rigorous full-wave vector domain integral formulation and the inversion is performed via a binary version of the so-called contrast-source, gradient-type technique. The functional analysis is outlined and the efficiency of the approach is discussed in the light of inversion results obtained with synthetic data in three typical defect configurations.
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Daniel dos Reis, Marc Lambert, Dominique Lesselier. Eddy-current evaluation of 3-D defects in a metal plate. Inverse Problems, IOP Publishing, 2002, 18 (6), pp.1857-1871. ⟨10.1088/0266-5611/18/6/325⟩. ⟨hal-00366109⟩



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