A double-tube flexible capacitive liquid level sensor and its measurement method

Abstract

The invention provides a double-tube flexible capacitive liquid level sensor and a measuring method thereof. The double-tube flexible capacitive liquid level sensor is provided with a single-stranded insulating copper core wire, two cylinders, end plates, cable head clamping assemblies, a spring and signal outgoing cables. The two cylinders are installed side by side at the same height, and the two end plates are installed at the two ends of the cylinders respectively and used for fixing the cable head clamping assemblies. The spring is placed between the two cylinders, and the spring is fixed to the end plates at the upper ends of the cylinders. The single-stranded insulating copper core wire penetrates through the two cylinders in a U shape and is fixed through the cable head clamping assemblies to serve as a metal electrode. The cylinders or a conducting medium serves as another electrode. The signal outgoing cables are arranged on the side walls of the first cylinder and the second cylinder. The double-tube flexible capacitive liquid level sensor is simultaneously suitable for measuring the liquid levels of the conducting medium, a non-conducting medium and different kinds of liquid, the measuring range can be adjusted according to the practical working condition, and the advantages that output capacitance is large, measuring precision is high, and the measuring range is convenient to adjust are achieved.

Description

technical field [0001] The invention relates to a double-tube flexible capacitive liquid level sensor and a measuring method thereof, belonging to the technical field of sensors. Background technique [0002] In many industrial production processes, it is often necessary to measure the height, volume and other parameters of various liquid materials, such as the position or height of the liquid surface stored in containers such as oil tanks, reservoirs, and water towers. Liquid level measurement mainly converts the change of liquid level into the change of relevant measurable physical parameters to realize its measurement. These physical parameters may be electrical or non-electrical, such as resistance, capacitance, inductance, differential pressure, sound velocity and light energy. Commonly used liquid level sensors for measurement principles include radar liquid level sensors, ultrasonic liquid level sensors, photoelectric liquid level sensors, differential pressure liquid...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing capacitive liquid level sensors adopt a rigid structure, and its measurement range is fixed after the sensor is designed, and it is difficult to adjust the range according to the actual working conditions

Moreover, due to the difference in the characteristics of conductive media or non-conductive media, under normal circumstances, general sensors are only suitable for a single type of media, or conductive media or non-conductive media, and only suitable for a certain type of liquid, which has strong limitations.

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