A high-temperature electrical capacitance tomography sensor and its preparation method

Abstract

The invention discloses a high-temperature capacitance tomography sensor and a preparation method thereof. The sensor can be applied in a high-temperature environment of 300°C. The sensor includes high temperature resistant array distributed measurement electrodes, shaft end shield electrodes, insulation isolation layer, outer shield and signal transmission line, wherein the array distribution electrode includes N measurement electrodes; the signal transmission line includes two parts: high temperature section and normal temperature section and includes cable core , insulating layer and shielding wire mesh. The invention improves the defect that the traditional sensor is not resistant to high temperature, solves the problem of difficult electrode arrangement in high temperature environment, and uses high temperature resistant insulating material to isolate and fix the electrode from the outer shielding cover, and leads the signal of the measuring electrode through the signal transmission line of the high temperature section, It provides an effective means for the study of gas-solid two-phase distribution, fluidization characteristics and related reaction monitoring under high temperature environment, and expands the application field of electrical capacitance tomography technology.

Description

technical field [0001] The invention belongs to the field of sensor design, and in particular relates to a capacitance tomography sensor applied in a high-temperature environment and a preparation method thereof. Background technique [0002] The development of electrical capacitance tomography (ECT) technology began in the 1980s. It is a process imaging technology that combines medical tomography and modern measurement technology. Its basic working principle is that components or concentrations in the measured object occur When it changes, it will cause a change in the dielectric constant, which will eventually lead to a change in the capacitance value measured by the capacitive sensor. Capacitance tomography mainly uses a multi-electrode array capacitive sensor to measure multiple pairs of capacitance values ​​that can reflect the distribution of the dielectric constant of the mixture. Then, the image reconstruction algorithm is used to realize the two-dimensional visuali...

AI Technical Summary

Problems solved by technology

At present, there are few relevant patent reports on high-temperature ECT sensors, and there is a need in this field for ECT sensors that can be used in high-temperature environments of 300 °C

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