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热词
    • 3. 发明授权
    • Capacitive fluid level sensor
    • 电容式液位传感器
    • US5103368A
    • 1992-04-07
    • US519731
    • 1990-05-07
    • John R. Hart
    • John R. Hart
    • G01F23/26
    • G01F23/268G01F23/266
    • A device that determines liquid level or volume by means of charging a plurality of capacitors in sequence. Each capacitor is charged for a fixed time interval. The voltage level obtained is a function of the liquid level and is compared with a known voltage to obtain an output signal that can be used to represent liquid depth. The capacitors are formed by two concentric tubes, one inside the other in a spaced relationship. The tubes reduce the effect of sloshing in the tank, resulting in a more stable reading. To measure volume or level in an irregular shaped tank, the capacitors can be arranged in a non-linear manner. The device has no moving parts to wear out and thus results in higher reliability and longer life.
    • 一种通过依次对多个电容器进行充电来确定液位或体积的装置。 每个电容器以固定的时间间隔充电。 获得的电压水平是液位的函数,并与已知电压进行比较,以获得可用于表示液体深度的输出信号。 电容器由两个同心的管形成,一个以间隔的关系形成。 管子减少了罐内晃动的影响,导致读数更稳定。 为了测量不规则形状的容器中的体积或电平,可以非线性地布置电容器。 该装置没有移动部件磨损,从而导致更高的可靠性和更长的使用寿命。