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SAFT processing of noncontact ultrasonic NDE data

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3 Author(s)
D. A. Hutchins ; Dept. of Phys., Queen's Univ., Kingston, Ont., Canada ; S. M. Kramer ; C. Saleh

Ultrasonic data have been obtained by scanning a pulsed EMAT (electromagnetic acoustic transducer) detector over the surface of an aluminum sample containing artificial defects. The annular EMAT was concentric with the source to imitate pulse-echo systems. Reflection data were processed using SAFT (synthetic-aperture focusing technique) methods, to give images of the defects. Details are given on modifications to the usual SAFT approach, to compensate for the finite EMAT aperture

Published in:

Ultrasonics Symposium, 1989. Proceedings., IEEE 1989

Date of Conference:

3-6 Oct 1989