发明名称 |
Portable microwave instrument for non-destructive evaluation of structural characteristics |
摘要 |
A portable microwave instrument for evaluating characteristics of a structural member includes a source of microwave energy, a transmitter coupled to the source of microwave energy for transmitting a microwave signal at the structural member, and a receiver positioned on the same side of the structural member as the transmitter and being disposed to receive a microwave signal reflected by the structural member. A phase angle difference is determined between the transmitted microwave signal and the received microwave signal using a signal splitter and a balanced mixer. The difference in phase angle varies in accordance with differences in size, shape and locations of constituent materials within the structural member.
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申请公布号 |
US5384543(A) |
申请公布日期 |
1995.01.24 |
申请号 |
US19920972776 |
申请日期 |
1992.11.09 |
申请人 |
MARTIN MARIETTA ENERGY SYSTEMS, INC. |
发明人 |
BIBLE, DON W.;CRUTCHER, RICHARD I.;SOHNS, CARL W.;MADDOX, STEPHEN R. |
分类号 |
G01N22/02;(IPC1-7):G01R27/00 |
主分类号 |
G01N22/02 |
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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