发明名称 |
MOISTURE DETECTION SYSTEM AND METHOD OF USE THEREOF |
摘要 |
A moisture detection system includes an electrical conductor mounted on a substrate. The electrical conductor has a resonant frequency that varies as a function of an amount of moisture on the substrate adjacent the electrical conductor. An oscillator outputs an oscillator signal at a predetermined amplitude and a predetermined frequency. A resonator circuit is coupled to t he substrate and is responsive to the oscillator signal and the resonant frequency of the electrical conductor for outputting a resonator signal havi ng an amplitude related to the resonant frequency of the electrical conductor. A filter circuit rectifies and filters the resonator signal and provides it to an analog-to-digital converter which outputs a digital signal related to the rectified and filtered resonator signal. A controller is responsive to the digital signal for causing a system associated with the substrate to operate in accordance with the digital signal.
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申请公布号 |
CA2475300(C) |
申请公布日期 |
2007.11.20 |
申请号 |
CA20022475300 |
申请日期 |
2002.02.28 |
申请人 |
PPG INDUSTRIES OHIO, INC. |
发明人 |
BARGUIRDJIAN, PASCAL;HAIGRON, MICHEL |
分类号 |
G01N27/00;G01N27/02;B60S1/08;B60S1/46;B60S1/50 |
主分类号 |
G01N27/00 |
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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