发明名称 |
Ultrasonic flaw detecting method and apparatus |
摘要 |
A method for ultrasonically detecting flaws in a welded portion of a pipe by using an ultrasonic wave phased array probe having an array of a plurality of transducer elements for emitting and receiving ultrasonic wave beams, wherein at least one monitoring probe is located in the vicinity of the welded portion to receive the ultrasonic wave beam, whereby peak values of the ultrasonic wave beams are detected within a predetermined gate, a maximum peak value of the detected peak values is determined to determine a pilot beam having the maximum peak value, and effective beams which reach the portion of the welding portion to be tested are determined from the determined pilot beam.
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申请公布号 |
US4821575(A) |
申请公布日期 |
1989.04.18 |
申请号 |
US19870105118 |
申请日期 |
1987.10.05 |
申请人 |
NIPPON STEEL CORPORATION;TOSHIBA KK;KRAUTKRAMER FOERSTER JAPAN CO LTD |
发明人 |
FUJIKAKE, YOICHI;SUGIMOTO, TAKAO;TAMAKI, KIYOHIDE;UDAGAWA, YOSHIO |
分类号 |
G01N29/44;G01N29/04;G01N29/11;G01N29/26;G01N29/28;(IPC1-7):G01N29/04 |
主分类号 |
G01N29/44 |
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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