3D capacitance tomography sensor

Abstract

The invention discloses a 3D electric capacitance tomography sensor. The 3D electric capacitance tomography sensor is used for fluid parameter measurement. The 3D electric capacitance tomography sensor comprises radical electrodes which are arranged on a pipe wall for fluid flowing, extend along a pipe axial direction and are arranged at equal intervals, a measuring electrode array which comprises multiple measuring electrodes which are arranged on the pipe wall at intervals, form multiple helical structures, are arranged in the intervals formed by the radical electrodes and are uniformly distributed on the pipe wall along a radial direction and an axial direction, and a shielding cover which electrically isolatedly covers the outer wall of the pipe.

Description

Technical field [0001] The invention relates to a sensor, in particular to a three-dimensional electrical capacitance tomography sensor. Background technique [0002] Electrical capacitance tomography (Electrical Capacitance Tomography, ECT) technology is a process tomography technology, which can reflect the change of the dielectric constant of the material in the measured area. Based on this principle, ECT is often used to measure the distribution of multiphase materials with two or more dielectric constants. [0003] The ECT sensor usually arranges a series of electrodes on the outer wall of the pipeline. By measuring the capacitance between all electrode pairs, and then using a certain image reconstruction algorithm, the dielectric constant distribution of the substance in the pipeline can be obtained. Depending on the measured process, the distribution image of the dielectric constant can reflect physical quantities such as concentration, humidity, and temperature, so it can ...

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Problems solved by technology

[0007] (1) The structure of the spiral electrode is asymmetrical, and the distribution of the sensitive field is uneven, so it is impossible to accurately image the material distribution;

[0008] (2) The layout of the upper and lower end shields is unreasonable, and the measurement area is irregular, making it difficult to extract the information in the measurement area, and it is impossible to effectively measure the process parameters

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