发明名称 |
Method and apparatus for detecting a dry/wet state of a thermistor bead |
摘要 |
A method of detecting a dry/wet state of a thermistor bead comprises the steps of: generating a current waveform that transitions between first and second current levels; conducting the current waveform through the thermistor bead; measuring a voltage waveform across the thermistor bead in response to the current waveform; measuring a slope of the voltage waveform in response to the first and second current levels and generating a first signal indicative of the measured slope; differentiating the voltage waveform to produce a voltage pulse representative of a transition of the voltage waveform from one voltage potential to another and generating a second signal indicative of the polarity of the voltage pulse; and detecting the dry/wet state of the thermistor bead based on the first and second signals. Apparatus for embodying this detection method is also disclosed. <IMAGE>
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申请公布号 |
EP1420245(A1) |
申请公布日期 |
2004.05.19 |
申请号 |
EP20030256238 |
申请日期 |
2003.10.02 |
申请人 |
SIMMONDS PRECISION PRODUCTS, INC. |
发明人 |
HALL, ROBBIE WILLIAM |
分类号 |
G01F23/24;G01N25/18;G01N25/56;(IPC1-7):G01N25/56 |
主分类号 |
G01F23/24 |
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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