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    • 2. 发明授权
    • Device for the capacitive measurement of levels
    • 电容测量装置
    • US4467646A
    • 1984-08-28
    • US319021
    • 1981-11-06
    • Walter H. BerrymanPeter J. MansonAdrian H. HamleyJoseph Korb
    • Walter H. BerrymanPeter J. MansonAdrian H. HamleyJoseph Korb
    • G01N27/22G01F23/26
    • G01F23/263
    • A device for the capacitive measurement of liquid levels, particularly in an automobile tank has a measurement sensor with measurement electrodes arranged concentric to each other forming a measurement capacitor, the space between the measurement electrodes communicating at a variable height with the liquid to be measured, and a channel within an inner of the measurement electrodes through which the liquid is drawn up. Compensation electrodes form a compensation capacitor in a suction path of the liquid with a constant level of the liquid by which the influence of different dielectric constants of the liquid on the result of a measurement is compensatable in an evaluation circuit to which the measurement capacitor and the compensation capacitor are connected. A sump vessel has a bottom disposed lower than an upper opening of the channel within the inner measurement electrode. The compensation electrodes are arranged in the sump vessel. An overflow is in liquid-conducting communication with the channel and the sump vessel, and a suction tube for the liquid extends substantially to the bottom of the sump vessel.
    • 用于液位电容测量的装置,特别是在汽车油箱中具有测量传感器,测量电极彼此同心设置,形成测量电容器,测量电极之间的空间与可测量的液体连通, 以及在测量电极的内部的通道,液体通过该通道被抽出。 补偿电极在具有恒定液位的液体的吸入路径中形成补偿电容器,液体的不同介电常数对测量结果的影响可在补偿测量电容器和 补偿电容器连接。 储槽容器的底部设置成比内部测量电极内的通道的上部开口低。 补偿电极设置在贮槽容器中。 溢流管与通道和贮槽容器连通,并且用于液体的抽吸管基本上延伸到贮槽容器的底部。