公开(公告)号：WO2006122173A3

公开(公告)日：2007-02-15

申请号：PCT/US2006018039

申请日：2006-05-10

Applicant: SCHRADER BRIDGEPORT INT INC ,  BOUDADOUD IDIR ,  STEWART WILLIAM DAVID ,  MCCALL ALAN KENNETH

Inventor： BOUDADOUD IDIR ,  STEWART WILLIAM DAVID ,  MCCALL ALAN KENNETH

IPC: G01F23/22

CPC classification number: G01F23/26 ,  G01F23/22 ,  G01F23/284

Abstract: In a liquid sensing system (10), an RF signal is applied to a series-resonant circuit. The coil (65) of the resonant circuit is placed proximate to a fuel tank (15), 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.

Abstract translation: 在液体感测系统（10）中，将RF信号施加到串联谐振电路。 谐振电路的线圈（65）靠近燃料箱（15）放置，使得电磁辐射传播到燃料空间中。 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电耦合到谐振回路。 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。

公开(公告)号：WO2006122173A2

公开(公告)日：2006-11-16

申请号：PCT/US2006/018039

申请日：2006-05-10

Applicant: SCHRADER BRIDGEPORT INTERNATIONAL, INC. ,  BOUDADOUD, Idir ,  STEWART, William, David ,  MCCALL, Alan, Kenneth

Inventor： BOUDADOUD, Idir ,  STEWART, William, David ,  MCCALL, Alan, Kenneth

CPC classification number: G01F23/26 ,  G01F23/22 ,  G01F23/284

Abstract: In a liquid sensing system (10), an RF signal is applied to a series-resonant circuit. The coil (65) of the resonant circuit is placed proximate to a fuel tank (15), 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.

Abstract translation: 在液体感测系统（10）中，将RF信号施加到串联谐振电路。 谐振电路的线圈（65）靠近燃料箱（15）放置，使得电磁辐射传播到燃料空间中。 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电耦合到谐振回路。 燃料的负载效应可以改变谐振电路的谐振频率和/或Q。 通过监测与激励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。