| 发明名称 |
ULTRASONIC FLAW DETECTION METHOD, ULTRASONIC FLAW DETECTION APPARATUS, AND PIPE MANUFACTURING METHOD |
| 摘要 |
An ultrasonic flaw detection method to detect flaws on an inner surface of a metallic pipe using ultrasonic waves includes a waveform hold step that acquires and holds waveform data of an echo signal when an ultrasonic probe that generates ultrasonic signals toward the inner surface and the metallic pipe are moved relative to each other, a signal analyzing step that calculates a path length up to receiving an echo signal from the inner surface and a change rate of the path length based on the waveform data held, and a flaw detecting step that detects flaws on the inner surface based on the path length and the change rate of the path length. |
| 申请公布号 |
US2015000095(A1) |
申请公布日期 |
2015.01.01 |
| 申请号 |
US201214374989 |
申请日期 |
2012.05.09 |
| 申请人 |
Iizuka Yukinori;Ozeki Takafumi;Matsui Yutaka |
发明人 |
Iizuka Yukinori;Ozeki Takafumi;Matsui Yutaka |
| 分类号 |
G01N29/04 |
主分类号 |
G01N29/04 |
| 代理机构 |
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代理人 |
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| 主权项 |
1. An ultrasonic flaw detection method to detect flaws on an inner surface of a metallic pipe using ultrasonic waves comprising:
a waveform holding step that acquires and holds waveform data of an echo signal when an ultrasonic probe that generates ultrasonic signals toward the inner surface and the metallic pipe are moved relative to each other; a signal analyzing step that calculates a path length up to receiving an echo signal from the inner surface and a change rate of the path length based on the waveform data held; and a flaw detecting step that detects flaws on the inner surface based on the path length and the change rate of the path length. |
| 地址 |
Tokyo JP |
