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    • 2. 发明授权
    • System and method for sensing the level and composition of liquid in a fuel tank
    • 用于感测燃料箱中液体的含量和组成的系统和方法
    • US07926341B2
    • 2011-04-19
    • US11431912
    • 2006-05-10
    • Idir BoudaoudWilliam StewartAlan McCall
    • Idir BoudaoudWilliam StewartAlan McCall
    • G01F17/00G01F23/00
    • G01F23/26G01F23/22G01F23/284
    • In a liquid sensing system, an RF signal is applied to a series-resonant circuit. The coil of the resonant circuit is placed proximate to a fuel tank, causing electromagnetic radiation to propagate into the fuel space. The fuel acts as an electrical load to the resonant circuit in a manner proportionate to the volume of fuel in the tank and/or to variations in electrical properties of the fuel itself. The loading effect of the fuel can change the resonant frequency and/or the Q of the resonant circuit. The loading effect of the fuel is determined by monitoring a change in one or more electrical parameters associated with the excited resonant circuit, such as a voltage across the resistor in the resonant circuit. Changes in this voltage are analyzed by a controller, the result of which is used to output a value indicative of level and/or composition of the fuel.
    • 在液体感测系统中,将RF信号施加到串联谐振电路。 谐振电路的线圈靠近燃料箱放置,导致电磁辐射传播到燃料空间。 燃料以与罐中燃料的体积成比例的方式和/或燃料本身的电气特性的变化作为对谐振回路的电负载。 燃料的负载效应可以改变谐振电路的谐振频率和/或Q。 通过监测与激发的谐振电路相关联的一个或多个电参数的变化(例如谐振电路中的电阻器两端的电压)来确定燃料的负载效果。 该电压的变化由控制器分析,其结果用于输出指示燃料的水平和/或组成的值。
    • 3. 发明申请
    • System and method for sensing the level and composition of liquid in a fuel tank
    • 用于感测燃料箱中液体的含量和组成的系统和方法
    • US20070000321A1
    • 2007-01-04
    • US11431912
    • 2006-05-10
    • Idir BoudaoudWilliam StewartAlan McCall
    • Idir BoudaoudWilliam StewartAlan McCall
    • G01F23/24
    • G01F23/26G01F23/22G01F23/284
    • In a liquid sensing system, an RF signal is applied to a series-resonant circuit. The coil of the resonant circuit is placed proximate to a fuel tank, causing electromagnetic radiation to propagate into the fuel space. The fuel acts as an electrical load to the resonant circuit in a manner proportionate to the volume of fuel in the tank and/or to variations in electrical properties of the fuel itself. The loading effect of the fuel can change the resonant frequency and/or the Q of the resonant circuit. The loading effect of the fuel is determined by monitoring a change in one or more electrical parameters associated with the excited resonant circuit, such as a voltage across the resistor in the resonant circuit. Changes in this voltage are analyzed by a controller, the result of which is used to output a value indicative of level and/or composition of the fuel.
    • 在液体感测系统中,将RF信号施加到串联谐振电路。 谐振电路的线圈靠近燃料箱放置,导致电磁辐射传播到燃料空间。 燃料以与罐中燃料的体积成比例的方式和/或燃料本身的电气特性的变化作为对谐振回路的电负载。 燃料的负载效应可以改变谐振电路的谐振频率和/或Q。 通过监测与激发的谐振电路相关联的一个或多个电参数的变化(例如谐振电路中的电阻器两端的电压)来确定燃料的负载效果。 该电压的变化由控制器分析,其结果用于输出指示燃料的水平和/或组成的值。