Capacitively coupled non-contact conductance measurement device and method based on virtual inductance

Abstract

The invention discloses a capacitive coupling type non-contact electric conductance measurement device and method based on a virtual inductor. The capacitive coupling type non-contact electric conductance measurement device based on the virtual inductor comprises an alternating current exciting source, a virtual inductor module, an insulation measurement pipeline, an exciting electrode, a detection electrode and a current detection module, wherein the exciting electrode and the detection electrode are installed on the outer wall of the insulation measurement pipeline; the two ends of the virtual inductor module are connected with the alternating current exciting source and the exciting electrode respectively; the detection electrode and the current detection module are connected. The virtual inductor replaces an ordinary inductor, a series resonance method continues to be used, and the adverse influence on the measuring range and the measurement flexibility by a coupling capacitor composed of electrodes, an insulation pipe wall and conductive liquid is avoided effectively. Meanwhile, compared with the ordinary inductor, the virtual inductor has the advantages that the size of the inductor is reduced effectively, adjustment of equivalent inductance is achieved, and the adverse influence on detection by parameters of the inductor is avoided. Corresponding devices have the advantages of being low in cost, free of interference with a flow field and the like, and provide the beneficial reference for electric conductance measurement of conductive liquid in the pipeline.

Description

technical field [0001] The invention relates to conductance detection technology, in particular to a capacitively coupled non-contact conductance measurement device and method based on virtual inductance. Background technique [0002] The liquid phase system in pipelines is ubiquitous in nature and industrial processes. The detection of liquid-related physical parameters is of great significance for accurate measurement, safe production, energy saving and environmental protection, industrial control process optimization and rational development of resources. Among them, the conductivity Conductivity is one of the basic physical parameters of liquids. Therefore, the detection of conductivity plays an important role in scientific research and production. [0003] Capacitive coupling non-contact conductivity detection technology is a new type of non-contact conductivity measurement technology. However, the coupling capacitance formed by its electrodes, insulating tube walls and...

AI Technical Summary

Problems solved by technology

However, there are some problems with the common inductance used in series resonance. For example, the common inductance is larger than the size of the capillary or small channel, and the inductance is difficult to adjust. In addition, the parameters such as the distributed capacitance of the inductance itself have an adverse effect on the detection.

Images