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公开(公告)号:EP1017970A4
公开(公告)日:2000-07-12
申请号:EP98941057
申请日:1998-08-26
申请人: KAY RAY SENSALL INC
发明人: BRENNER RAUL , ESIN ALEX J , JONES LAWRENCE J , ROSSELSON BORIS
CPC分类号: G01F23/268 , G01F23/265 , G01F23/266 , Y10T307/779 , Y10T307/826
摘要: A capacitive level sensor (10) for sensing level of a liquid (102) in a vessel (100) includes a sensor (14) coupled to the vessel (100) having a shield (32) and an inner sensing rod (34). An oscillator (44) provides an RF signal to the shield (32) and the sensing rod (34). Comparison circuitry (48) coupled to the sensing rod (34) provides a wet/dry output in response to capacitance between the inner sensing rod (14) and the vessel (100), the capacitance is related to the level of the liquid (102) in the vessel (100).
摘要翻译: 一种用于感测容器(100)中的液体(102)的液位的电容式液位传感器(10)包括耦合到具有护罩(32)和内部感测杆(34)的容器(100)的传感器(14)。 振荡器(44)向屏蔽(32)和感测棒(34)提供RF信号。 耦合到感测棒(34)的比较电路(48)响应于内部感测棒(14)和容器(100)之间的电容提供湿/干输出,电容与液体(102 )在容器(100)中。