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autometer analog fuel level gauge
The autometer analog fuel level gauge is an important device in the engine fuel protection system. Its function is to accurately measure the remaining fuel in the fuel tank to maintain the automatic fuel supply to the engine, so that the engine can run normally. The circuit greatly reduces the influence of parasitic capacitance and stray capacitance, and realizes temperature compensation, which improves the measurement accuracy. Experiments show that the fuel level gauge can reach a data refresh rate of 100Hz, with a measurement accuracy of 0.1 liters, and can achieve reliable alarms.
The fuel level gauge is an important device in the engine fuel protection system. Its measurement result is one of the basis for the staff to determine the working state and working time limit of the engine. The function of the fuel level gauge is to accurately measure the remaining fuel in the fuel tank to maintain the automatic fuel supply to the engine, so that the engine can run normally. Capacitive sensors with variable dielectric constant are widely used for liquid level measurement of various fuels or non-conductive liquids. It has good temperature stability, high measurement accuracy, good dynamic response, simple structure, reliable operation, fast dynamic response and easy use and a series of advantages, especially suitable for dynamic, online measurement
Principle of autometer analog fuel level gauge level sensor: Capacitive liquid level sensor is measured by the principle that the change of liquid level makes the capacitance value change. This high-tech digital measurement principle provides very high measurement flexibility and has a very wide capacitance measurement range, from 0f F to several hundred n F. The measurement accuracy is programmable. It is also suitable for applications with measurement rates up to 50k Hz, and a low supply current of 10µA can be achieved at low speed measurements. The ratio of the sensor capacitance to the reference capacitance is equal to the ratio of the discharge time of the two. Its unique algorithm can well suppress the influence of parasitic capacitance on the measurement results, and its integrated temperature compensation module can also ensure good stability
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