METANORDNING FOR VETSKA

申请公布号：SE8301685(L)

申请号：SE19830001685

申请日期：1983.03.28

申请公布日期：1983.09.30

申请人：

SMITHS INDUSTRIES PLC

发明人：CLINTON P

分类号：G01F23/26;(IPC1-7):01F23/26

主分类号：G01F23/26

摘要：<p>A fuel-gauging system has a capacitive probe mounted in a fuel tank and supplied with an alternating voltage Vs from a drive unit. The output of the probe is rectified by a diode mounted in the tank, prior to supply to a measuring unit. The voltage VD across the diode varies with temperature and is measured periodically by reducing the input voltage Vs by a known factor X. The voltage VD is calculated by the measuring unit from the two output currents I1 and I2 produced respectively at the two different voltages Vs and Vs/X. The capacitance and hence the depth of fluid is calculated using the known voltage VD across the diode. The drive unit has a transformer that is used to reduce the voltage periodically by switching between different tappings of its secondary windings.</p>

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