Abstract

The paper deals with high frequency scattering. The backscattered amplitude for a convex flaw is proportional to a function depending on the Gaussian curvature at the point where the wavefront makes contact with the flaw surface. A numerical algorithm is employed for reconstruction of the flaw shape and orientation from the known amplitude of the backscattered wave. Experimental results obtained for two-dimensional defects (oval, triangle) produced in a thick aluminium plate are in good agreement with the numerical reconstruction. The proposed method enables identification of an image of arbitrary convex flaws in real time using a 386-based PC.

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