Title :
SAFT processing of noncontact ultrasonic NDE data
Author :
Hutchins, D.A. ; Kramer, S.M. ; Saleh, C.
Author_Institution :
Dept. of Phys., Queen´´s Univ., Kingston, Ont., Canada
Abstract :
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
Keywords :
nondestructive testing; ultrasonic materials testing; ultrasonic reflection; ultrasonic transducers; Al; SAFT processing; artificial defects; electromagnetic acoustic transducer; finite EMAT aperture; noncontact ultrasonic NDE data; nondestructive examination; pulse-echo systems; pulsed EMAT; reflection data; surface; synthetic-aperture focusing technique; Acoustic pulses; Acoustic reflection; Acoustic signal detection; Acoustic transducers; Aluminum; Apertures; Detectors; EMP radiation effects; Electromagnetic reflection; Focusing;
Conference_Titel :
Ultrasonics Symposium, 1989. Proceedings., IEEE 1989
Conference_Location :
Montreal, Que.
DOI :
10.1109/ULTSYM.1989.67067
