发明名称 |
Microwave probe for measurement of dielectric constants |
摘要 |
A microwave probe for measuring the amount of soot or water in engine crankcase oil and/or detecting the level of oil comprises a coaxial cable having a tip including five substantially parallel wires shorted together at one end and connected at the other end to the coaxial cable, one of the wires being connected to the center wire of the coaxial cable and the other four wires being connected to the sheath of the coaxial cable. The size and geometry of the wires is selected so that the impedance of the tip when immersed in oil substantially matches the impedance of the coaxial cable.
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申请公布号 |
US4544880(A) |
申请公布日期 |
1985.10.01 |
申请号 |
US19840671594 |
申请日期 |
1984.11.15 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
NAGY, LOUIS L.;O'ROURKE, MICHAEL J. |
分类号 |
G01F23/284;G01N22/00;G01R27/04;G01R27/26;(IPC1-7):G01R27/04 |
主分类号 |
G01F23/284 |
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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