Capacitance sensing type fuel meter

Abstract

The invention relates to a type fuel metering device, in particular to a capacitance sensing type fuel meter. The meter comprises a comparison capacitance sensor group, a capacitance measuring transducer circuit board and a signal processing, calculating and displaying instrument circuit board, wherein the comparison capacitance sensor group is inserted in an oil tank, the capacitance of the sensor group changes with the dielectric constant of a medium between polar plates so that the oil quantity in the oil tank can be obtained by measuring the capacitance value of the measured capacitor. Compared with the existing fuel needle indicator, the meter of the invention has the following beneficial effects: the meter has high precision, sensitivity and reliability, the oil quantity and fuelingcharge of the vehicle-mounted oil tank can be accurately measured, the fueling charge and the fuel quality can be monitored simultaneously; and no mechanical movement is generated and the shock resistant performance is good.

Description

technical field [0001] The invention relates to a fuel metering device, in particular to a capacitance sensing type fuel meter. Background technique [0002] Previously, in the domestic and foreign automobile markets, the measurement of the amount of fuel in the vehicle's fuel tank was almost always carried out with a float-type liquid level sensor. The floating position of the float on the fuel liquid surface was detected and displayed by a pointer instrument. Therefore, low sensitivity, large error, slow response speed, poor temperature stability, large zero point drift, low shock resistance, poor reliability, and difficult maintenance, maintenance and repair make the fuel gauges of many cars seem to be useless. [0003] In addition, since the measurement accuracy is much lower than the calibration accuracy of the fuel dispenser at the gas station, it is impossible to monitor the amount of refueling in the fuel tank, and the water content in the fuel cannot be measured, so...

AI Technical Summary

Problems solved by technology

Therefore, low sensitivity, large error, slow response speed, poor temperature stability, large zero point drift, low shock resistance, poor reliability, and not easy to maintain, maintain and overhaul, making the fuel gauges of many cars seem to be fake.

[0003] In addition, since the measurement accuracy is much lower than the calibration accuracy of the fuel dispenser at the gas station, it is impossible to monitor the amount of refueling in the fuel tank, and the water content in the fuel cannot be measured, so the quality of the fuel cannot be monitored.

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