发明名称 |
Apparatus for measuring the thickness of clad material |
摘要 |
An apparatus for measuring the thickness of a clad material having an outer mother metal and an inner clad metal. The apparatus includes a transmitter crystal and a receiver crystal of a double crystal angle-type probe which contact the outer surface of the mother metal, for receiving a first echo from the boundary surface of the mother metal and clad metal, and for receiving a second echo from the inner, bottom surface of the clad metal. The apparatus further includes an amplifier for amplifying the echo signals, a detector for detecting the zero-crossing points of the echoes, a zero point determining circuit, a calculator for calculating the periods from a zero point in time to the zero-crossing points, and a calculator for calculating the thickness of the clad material and clad metal based on the calculated periods.
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申请公布号 |
US5349860(A) |
申请公布日期 |
1994.09.27 |
申请号 |
US19920882455 |
申请日期 |
1992.05.12 |
申请人 |
NKK CORPORATION |
发明人 |
NAKANO, DECEASED, TETSUO;KATSUMATA, TAKESHIGE;TANAKA, MEGUMU;NARUSHIMA, ISAO;HIRANO, YOSHIHARU;NAKANO, KAZUKO |
分类号 |
G01N29/07;(IPC1-7):G01N29/10 |
主分类号 |
G01N29/07 |
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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