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The DORT method (Decomposition de l'Operateur de Retournement Temporel in French) is a scattering analysis technique which uses arrays of transducers. This method is efficient for detection of selective focusing on point-like scatterers. It has been also applied to analyze the scattering by an air-filled cylindrical steel shell immersed in water. It was shown that the diagonalization of the time reversal...
Lamb waves are particularly useful in the non-destructive testing domain of guided structures. However, they have the drawback to be dispersive and multimodal. These two characteristics make their processing particularly delicate during measurements. With a time reversal mirror (TRM), realized with an array of 32 transducers coupled to a Lucite wedge and where each transducer is associated to an...
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