G - Physics – 01 – N
Patent
G - Physics
01
N
349/42
G01N 29/04 (2006.01) G01N 29/00 (2006.01) G01N 29/26 (2006.01) G01S 7/52 (2006.01) G10K 11/34 (2006.01)
Patent
CA 1193355
ABSTRACT OF THE DISCLOSURE An ultrasonic flaw detecting apparatus of electro- nically scanning type comprises a plurality of ultra- sonic vibrator elements disposed in an arcuate array, wherein groups of N vibrator elements arrayed in the circumferential direction of an object under test are sequentially changed over to one another on one-by-one base to thereby scan an object under test with ultrasonic beams. By controlling phases of pulse signals applied to the individual vibrator elements, a region of focusses of the ultrasonic beams is set at a predetermined depth of the object under test. In reception, only the echoes reflected from a predetermined focal range are selecti- vely extracted by providing corresponding window or gate means.
405546
Hiruoka Shuichi
Kino Hirotoshi
Sato Yasuaki
Sugai Kazuo
Hitachi Ltd.
Hitachi Engineering Co. Ltd.
Kirby Eades Gale Baker
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