Electric-conductive liquid level sensor applied to severe environments

Abstract

An electric-conductive liquid level sensor applied to severe environments is mainly composed of a multi-probe structure sensing probe with unique design, a transmission cable of which one end connected to the sensing probe adopts a special wire arrangement structure, a remote circuit connected to the other end of the transmission cable, as well as upper computer signal processing and system control software. Through connection of the transmission cable, the remote circuit can be separated from a detected environment; materials of the sensing probe are selected rationally, so that the sensing system is more applicable to the severe application environments such as high-temperature, high-pressure, high-humidity and high-corrosion environments; because of the unique design of the sensing probe and development of related detection algorithms, the system has a function of remote disconnection detection; and because of rational development of the remote circuit, the dynamic response speed and the measurement accuracy of the system are increased effectively, and a corrosion problem caused by thermal and electro-chemical effects in the severe environments is solved effectively.

Description

technical field [0001] The invention relates to a fixed-point liquid level detection sensor system, in particular to a low-cost, high-precision conduction type liquid level sensor applicable to harsh environments such as high temperature, high pressure, high humidity, and high corrosion. Background technique [0002] In the production process, the accuracy of liquid level measurement directly affects the output and quality of products, production safety and production costs. At present, the common methods of measuring liquid level mainly include static pressure type, float type, capacitive type, ultrasonic wave and conductivity type liquid level measurement methods. The static pressure liquid level gauge is based on the measurement of the static pressure of the liquid, and its measurement accuracy is low, depending on the density of the gas used; the float type liquid level gauge causes the displacement of the float by the change of the liquid level, thereby causing the rota...

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Problems solved by technology

[0004] The domestically published patents on conductance liquid level sensors have not been well resolved for the application of conductance liquid level sensors in harsh environments such as high temperature, high pressure, high humidity, and high corrosion.

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