Double mode electric imaging system sensor and image rebuilding method based on said sensor

Abstract

This invention provides a sensor with a double mode electric imaging system, in which, the radial section structure of the sensor is composes of three layers, the outside is a metal tube layer, the middle is an insulation substance layer and the inside structure layer is composed of multiple electrodes distributed on a same circle and adhered on the insulation substance layer and realizing the synchronous measurement of the actual and virtual parts of impedance, insulation substances are filled in slits between adjacent electrodes, the longitudinal sectional structure of the sensor is designed as an electrode array realizing synchronous measurement to the actual and virtual parts of the tube section impedance, besides, a method is provided for re-structuring two kinds of images based on the sensor to expand the sphere and accuracy of the measurement of the current ERT and ECT system.

Description

technical field [0001] The invention relates to a detection device and its application, in particular to a dual-mode electrical imaging system sensor and an image reconstruction method based on the sensor. Background technique [0002] Electrical impedance tomography (EIT, electrical impedance tomography) is a parameter detection technology developed in recent years for the visualization of multiphase flow and human biological tissues. In order to realize visual measurement, the core component of the whole system is the impedance sensor, which obtains the impedance information of the medium on the pipe section, and then realizes parameter detection in the form of tomography. [0003] As far as EIT systems are concerned, various configurations of sensors can be found in published patent literature. The electrodes used in the current EIT system, the electrodes in the patents (GB2119520-A, EP172616-A2, US2005020935-A1, US4486835-A), are directly in contact with the measured hu...

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Problems solved by technology

Since the realization of resistive mode and capacitive mode corresponds to the isolated ERT system and ECT system respectively, the measurement realized is only on different sections, and the different positions of different modes of the same flow pattern are measured asynchronously, which increases the It increases the workload and complexity of hardware design, is not conducive to the fusion of impedance real and imaginary part information, and also affects the measurement range and real-time performance, which limits the industrial application of electrical impedance tomography technology.

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