发明名称 |
Ultrasonic inspection apparatus |
摘要 |
In an ultrasonic inspection method and apparatus for inspecting the presence or absence of a defect in an object to be inspected by receiving as an RF signal a reflection beam of an ultrasonic beam emitted from a probe to the object and displaying data of the RF signal on a display unit, a maximum value indicative of a positive peak of the RF signal is detected, a maximum absolute value indicative of a negative peak of the RF signal is detected, a computation is performed for comparing in magnitude the maximum value indicative of the positive peak with the maximum absolute value indicative of the negative peak, and a computed value is displayed on the display unit so that the presence or absence of a phase inversion of the RF signal may be judged for deciding the presence or absence of a defect in the object.
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申请公布号 |
US4862383(A) |
申请公布日期 |
1989.08.29 |
申请号 |
US19860919766 |
申请日期 |
1986.10.16 |
申请人 |
HITACHI CONSTRUCTION MACHINERY CO., LTD. |
发明人 |
KOSHIMIZU, CHISHIO;HAYAKAWA, YASUO;NONAKA, TOSHIO;TAKEDA, SAKAE |
分类号 |
G01N29/04;G01N29/11;G01N29/38;G01N29/48 |
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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