Method and device for liquid level measurement based on sectional capacitor, and electronic device

Abstract

The invention provides a method and a device for liquid level measurement based on sectional capacitors, and an electronic device, and belongs to the field of liquid level measurement. The measurementmethod comprises: obtaining current voltage information, the voltage information including a triangular wave voltage value and a linear voltage value; according to corresponding relations of preset linear voltage and liquid level height, determining liquid level height corresponding to the obtained linear voltage value; according to the determined liquid level height, determining the section number of a sectional unit where the current liquid level is in; according to the triangular wave voltage value, determining height of the current liquid level in the sectional unit; and according to thesection number of the sectional unit and the height in the sectional unit, determining liquid level height. The method realizes high precision measurement of low-temperature liquid level under violentshaking conditions, and measurement requirement of low-temperature liquid level in rocket flight is satisfied.

Description

technical field [0001] The invention relates to a liquid level measurement method, device and electronic equipment based on segmental capacitance, belonging to the field of liquid level measurement. Background technique [0002] Low-temperature hydrogen-oxygen propellants are mostly used in my country's new-generation launch vehicles and other aircraft, and the effective use of propellants will affect the orbital accuracy of the aircraft. For the utilization of low-temperature propellant in aircraft, the low-temperature liquid level is the most important measurement parameter, which is the basis for calculation and regulation of propellant during flight. In view of the characteristics of low temperature liquid level measurement, such as large range, high precision, fast liquid level change, and liquid level sloshing, the existing measurement technology uses segmental capacitance liquid level sensors, equipped with corresponding signal conversion equipment, and outputs multi-...

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Problems solved by technology

[0005] With the development of a new generation of launch vehicles, the environment for low-temperature liquid level measurement is more complicated. During the flight, the rocket body is impacted and the liquid level shakes violently. The sensor is sensitive to the false triangle wave output by the shaking liquid level. The above triangle wave liquid level measurement method cannot distinguish between The real triangular wave is still the triangular wave formed by the liquid level shaking, which will lead to the wrong judgment of the number of triangular waves, and the liquid level height measurement cannot be realized

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