发明名称 |
Nondestructive testing |
摘要 |
Electrically conductive work pieces such as steel tubes or pipes are tested by means of a transducer comprised of a row of magnetic pole pieces through which a dc flux pattern of alternating polarity and direction is set up along a line of pole extensions and through which bidirectional ac ultrasonic transmission takes place to discover defects which return ultrasonic pulses.
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申请公布号 |
US4793185(A) |
申请公布日期 |
1988.12.27 |
申请号 |
US19870039672 |
申请日期 |
1987.04.17 |
申请人 |
MANNESMANN AG |
发明人 |
BOETTGER, WOLFGANG;WEINGARTEN, WILLI;SCHNEIDER, HEINZ |
分类号 |
G01N29/04;G01N29/24;G01N29/26 |
主分类号 |
G01N29/04 |
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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