发明名称 |
ULTRASONIC FLAW DETECTING APPARATUS OF ELECTRONICALLY SCANNING TYPE |
摘要 |
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. |
申请公布号 |
DE3277645(D1) |
申请公布日期 |
1987.12.17 |
申请号 |
DE19823277645 |
申请日期 |
1982.06.21 |
申请人 |
HITACHI, LTD.;HITACHI ENGINEERING CO., LTD. |
发明人 |
SUGAI, KAZUO;SATO, YASUAKI;KINO, HIROTOSHI;HIRUOKA, SHUICHI |
分类号 |
G01N29/38;G01N29/04;G01N29/06;G01N29/26;G01N29/28;G01S7/52;G10K11/34;(IPC1-7):G01N29/00 |
主分类号 |
G01N29/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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