Title :
Electronic B-scan imaging using a wedge transducer
Author :
Germain, L. ; Cheeke, J.D.N.
Author_Institution :
Dept. de Phys., Sherbrooke Univ., Que., Canada
Abstract :
It has been shown in previous work that it is possible to do electronic scanning in one dimension in acoustical imaging using a wedge transducer. The basic principle, whereby different frequencies excite ultrasonic waves at different points along the length of the transducer, is extended to B-scanning by doing time-of-flight analysis at each frequency. Examples of B-scan images obtained by this method are presented for targets in aluminum and Plexiglas samples. The feasibility of obtaining real-time subsurface and surface profile images without mechanical movement is demonstrated. The disadvantage is the resolution degradation associated with the wedge transducer, but this may not be a problem for certain applications where the real time capacity is primordial
Keywords :
ultrasonic materials testing; Al; B-scan images; Plexiglas samples; acoustical imaging; electronic B-scan imaging; resolution degradation; surface profile images; targets; time-of-flight analysis; ultrasonic waves; wedge transducer; Acoustic imaging; Acoustic transducers; Biomedical acoustics; Electrodes; Frequency estimation; Lenses; Microscopy; Pulse amplifiers; Ultrasonic imaging; Ultrasonic transducers;
Conference_Titel :
Ultrasonics Symposium, 1990. Proceedings., IEEE 1990
Conference_Location :
Honolulu, HI
DOI :
10.1109/ULTSYM.1990.171517