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1. 发明公开

EP2741721A4 WETNESS SENSORS 失效
标题翻译： FEUCHTIGKEITSSENSOR
公开(公告)号：EP2741721A4
公开(公告)日：2015-04-22
申请号：EP12822335
申请日：2012-08-03
申请人： 3M INNOVATIVE PROPERTIES CO
发明人： PRIOLEAU LORI-ANN S , JOHNSON JUSTIN M , LORENTZ ROBERT D , BADRI BRINDA B , VANOUS JAMES C , CHATTERTON JACOB D , PERRON STEVEN J , BATTLES DONALD R , VEERARAGHAVAN BADRI
IPC分类号： A61F13/42 , G01V15/00 , G08B21/20
CPC分类号： A61F13/42
摘要： A wetness sensor includes a self-supporting substrate and an electrically conductive trace carried by the substrate. The trace is patterned to provide at least a portion of a tuned RF circuit, which may be disposed on only one side of the substrate and characterized by an impedance or resistance. The trace is not self-supporting. The substrate is adapted to dissolve, swell, or otherwise degrade when contacted by a target fluid. Such degradation produces a drastic change in the operation of the RF circuit, which can be interpreted by a remote reader as a “wet” condition. Contact of the substrate by the target fluid may change the impedance or resistance of the RF circuit by at least a factor of 5, 10, 100, or 1000, and/or may cause the trace to disintegrate so as to provide the RF circuit with an open circuit, and/or may substantially render the RF circuit inoperative.
摘要翻译：湿度传感器包括自支撑衬底和由衬底承载的导电迹线。迹线被图案化以提供调谐RF电路的至少一部分，其可以仅设置在衬底的一侧上，并且由阻抗或电阻表征。痕迹不是自给自足的。底物适于当被目标流体接触时溶解，膨胀或以其它方式降解。这种劣化导致RF电路的操作急剧变化，这可以由远程读取器解释为潮湿条件。通过目标流体接触衬底可以将RF电路的阻抗或电阻改变至少5,10,100或1000倍，和/或可能导致迹线瓦解，从而为RF电路提供和/或可以使RF电路基本上不起作用。

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