Segmental capacitor type continuous liquid level sensor

Abstract

The invention relates to a segmental capacitor type continuous liquid level sensor, and in particular relates to a capacitor type sensor for measuring continuous liquid level. Inner electrodes, outer electrodes, a connection bush, coupling screws, soldering flakes, a cable and a digital processor are arranged in the sensor, wherein the outer electrodes are divided into an odd group and an even group; the soldering flakes are riveted on the outer electrodes through rivets, used for connecting the cable, and connected in series with the odd group and the even group respectively; the outer electrodes are sequentially connected together through the connection bush and fixed by use of the coupling screws; the inner electrodes and the outer electrodes are concentrically mounted to form an annular capacitor, namely the segmental capacitor; and the signals of the segmental capacitor sensor are processed by the digital processor which outputs the liquid level height. The sensor provided by the invention has the advantages of high measurement resolution, wide measurement range, fast dynamic response and the like, realizes automatic calibration and saves zero setting.

Description

technical field [0001] The invention relates to a device for measuring liquid level, in particular to a capacitive sensor for continuous liquid level measurement, which belongs to the technical field of sensors. Background technique [0002] The liquid level parameter is one of the important parameters in many fields such as aviation and aerospace. For liquid rockets, in the rocket propulsion system, the change of the propellant liquid level is the basis for propellant management and regulation during rocket flight. During the test or filling process, the liquid level parameters of the propellant tank need to be measured in real time. The liquid level parameter is related to the measurement of the filling amount of rocket propellant, the measurement of the remaining amount of propellant, and the control of the shutdown of the rocket when the propellant is exhausted; at the same time, the liquid level parameter is also the basic parameter of the rocket utilization system. T...

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Problems solved by technology

This greatly increases the difficulty of liquid level measurement, so it is necessary to propose a measuring device that can work at low temperature, work reliably, and have high measurement accuracy.

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