Industrial capacitively coupled contactless conductivity online measurement device and method

Abstract

The invention discloses an industrial capacitively coupled contactless conductivity online measurement device and method. The device comprises an alternating current excitation source, an insulated pipeline, an exciting electrode, a detection electrode, an inductance module, a metal shield, a metal isolation plate, a metal flange connecting part, a first wire connecting terminal, a second wire connecting terminal, a signal processing module, a data acquisition module and a computer. The invention realizes the conductivity online measurement on an industrial conventional metal pipeline throughthe capacitively coupled contactless conductivity measurement technology. By using the metal flange connecting part, the insulated pipeline of the device can be conveniently connected with the metal pipeline on an industrial site. Simultaneously, the measured pipeline and the electrodes are mounted in a metal shielding housing, thereby improving the stability and the anti-interference ability of the device. The corresponding device has the advantages of high resolution, simple structure, non-invasive operation, no impacts on fluid in the pipeline and the like, thereby providing a helpful reference for non-invasive online measurement of the conductivity of liquid in the process industrial conventional metal pipeline.

Description

technical field [0001] The invention relates to conductance detection technology, in particular to an industrial capacitive coupling type non-contact conductance online measuring device and method. Background technique [0002] The liquid phase system in the pipeline widely exists in the scientific research and production process of metallurgy, chemical engineering, biomedicine, environmental protection and sewage treatment and other departments. The conductivity is one of the basic physical parameters of the liquid. Other characteristic parameters of the liquid in the pipeline play an important role, such as concentration, composition, chemical reaction rate, etc. It is precisely because many differences in physical and chemical properties of liquids will be reflected in changes in its conductivity, so the online measurement of the conductivity of liquids in pipelines has a wide range of applications and important research significance in production and scientific research....

AI Technical Summary

Problems solved by technology

[0005] However, the current capacitive-coupled non-contact conductivity measurement method is mainly used in the field of analytical chemistry, and the application environment is mostly in the laboratory environment, and the pipeline of the sensor is mostly capillary, which is very different from the application environment in the industrial field.

In the field of process industry, the size of the pipeline is generally between a few millimeters and tens of millimeters, or even larger. Obviously, the original capacitively coupled non-contact conductivity measurement sensor is not suitable for use on industrial conventional pipelines.

In addition, since the pipeline of the capacitively coupled non-contact conductivity measurement sensor is an insulated pipeline, and the industrial metal pipeline is generally a metal pipeline, the original capacitively coupled non-contact conductivity measurement sensor cannot be easily connected to the industrial metal pipeline.

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