发明名称 |
Method and apparatus for determining the acoustic velocity of a workpiece |
摘要 |
A method and apparatus for determining by the pulse-echo method the acoustic velocity of a workpiece of known thickness utilize measurement of the transit time of the first rear wall echo signal and that of the second rear wall echo signal. The two transit times are then processed in a microprocessor which also controls the entire measuring cycle. For accurate measurement the transit time is defined as the time interval from the leading edge of the trigger pulse, which triggers the transmit pulse generator, to the time at which the respective echo signal exceeds a preset threshold amplitude.
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申请公布号 |
US4364114(A) |
申请公布日期 |
1982.12.14 |
申请号 |
US19800205302 |
申请日期 |
1980.11.10 |
申请人 |
KRAUTKRAEMER-BRANSON INCORPORATED |
发明人 |
RENZEL, PETER;KROESEN, KLAUS |
分类号 |
G01H5/00;(IPC1-7):G01N29/00 |
主分类号 |
G01H5/00 |
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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