Measuring and testing – Vibration – By mechanical waves
Patent
1982-06-18
1984-09-25
Ciarlante, Anthony V.
Measuring and testing
Vibration
By mechanical waves
73628, G01N 2904
Patent
active
044729731
ABSTRACT:
An ultrasonic flaw detecting apparatus of electronically scanning type comprises a plurality of ultrasonic 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 focus of the ultrasonic beams is set at a predetermined depth of the object under test. For reception, only the echoes reflected from a predetermined focal range are selectively extracted by providing corresponding window or gate means.
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Hiruoka Shuichi
Kino Hirotoshi
Sato Yasuaki
Sugai Kazuo
Ciarlante Anthony V.
Hitachi , Ltd.
Hitachi Engineering Co. Ltd.
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