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1.发明授权Method, apparatus, hardware, and computer program product for a liquid level sensor 失效用于液位传感器的方法，设备，硬件和计算机程序产品公开(公告)号：US07343798B1
公开(公告)日：2008-03-18
申请号：US11728830
申请日：2007-03-27
IPC分类号： G01F23/26
摘要： A method, apparatus, hardware, and computer program product for measuring a parameter related to the height of a liquid in a measurement vessel. An alternating voltage is applied to an input rod positioned in a reference vessel containing the liquid at a known height. A reference signal is obtained from a collector rod positioned in the reference vessel. An alternating voltage is also applied to an input rod positioned in the measurement vessel, and a measurement signal is obtained from a collector rod positioned in the measurement vessel. A parameter related to height of liquid in the measurement vessel is obtained based upon a relationship between the reference voltage and the measurement voltage, wherein the parameter is substantially independent of the electrical conductivity of the liquid in the vessels. Circuitry for determining the height is described.
摘要翻译： 一种用于测量与测量容器中的液体的高度有关的参数的方法，装置，硬件和计算机程序产品。 将交流电压施加到位于包含已知高度的液体的参考容器中的输入杆上。 从位于参考容器中的收集杆获得参考信号。 交流电压也施加到位于测量容器中的输入杆，并且从位于测量容器中的收集杆获得测量信号。 基于参考电压和测量电压之间的关系获得与测量容器中的液体高度相关的参数，其中参数基本上与容器中的液体的电导率无关。 描述用于确定高度的电路。
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公开(公告)号：US20070252673A1
公开(公告)日：2007-11-01
申请号：US11786687
申请日：2007-04-11
IPC分类号： H01C10/32
CPC分类号： G01R15/04
摘要： A voltage divider for high precision voltage measurement has one or more pair of potentiometers. The wipers of each pair of potentiometers are ganged so that the sum of their resistances relative to a first end of the respective potentiometer is a constant. An output potentiometer or a pair of resistors provide an output for measuring the output voltage. The resolution of the voltage divider is the product of the resolution of each potentiometer pair and the output potentiometer.
摘要翻译： 用于高精度电压测量的分压器具有一对或多对电位器。 每对电位器的擦拭器被联动，使得它们相对于相应电位计的第一端的电阻之和是恒定的。 一个输出电位器或一对电阻提供一个用于测量输出电压的输出。 分压器的分辨率是每个电位器对和输出电位器的分辨率的乘积。
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公开(公告)号：US07667567B2
公开(公告)日：2010-02-23
申请号：US11786687
申请日：2007-04-11
IPC分类号： H01C10/32
CPC分类号： G01R15/04
摘要： A voltage divider for high precision voltage measurement has one or more pair of potentiometers. The wipers of each pair of potentiometers are ganged so that the sum of their resistances relative to a first end of the respective potentiometer is a constant. An output potentiometer or a pair of resistors provide an output for measuring the output voltage. The resolution of the voltage divider is the product of the resolution of each potentiometer pair and the output potentiometer.
摘要翻译： 用于高精度电压测量的分压器具有一对或多对电位器。 每对电位器的擦拭器被联动，使得它们相对于相应电位计的第一端的电阻之和是恒定的。 一个输出电位器或一对电阻提供一个用于测量输出电压的输出。 分压器的分辨率是每个电位器对和输出电位器的分辨率的乘积。
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