A centrally powered electrode system for electrical impedance imaging of horizontal pipelines

Abstract

The invention relates to a central power supply type electrode system for electrical impedance tomography of a horizontal pipeline. The central power supply type electrode system is used for measuringconductive fluid conveyed by the horizontal pipeline. The central power supply type electrode system comprises a metal rod, a plurality of electrode units, a voltage source and a shielding cover, which are axially fixed inside the horizontal pipeline; the electrode system comprises the plurality of electrode units; each electrode unit comprises a signal electrode, a power supply electrode, a wireless communication module, a power supply module, a signal control module, a high-pass filter and a signal excitation and measurement unit; the signal control modules are in wireless communication with the outside through the wireless communication modules, send measurement results and control the switching between the excitation state and the measurement state of the signal electrodes according to received wireless signals; each power supply module comprises a voltage stabilization module and a low-pass filter; the voltage stabilization modules are connected between the shielding cover and the power supply electrodes; and the output of the voltage stabilization modules is subjected to low-pass filtering and then is used for supplying power for the whole electrode units through power supply cables.

Description

technical field [0001] The invention relates to a wireless communication-based central power supply type electrical impedance imaging measuring device. Background technique [0002] Electrical impedance tomography (EIT) technology is a process detection technology developed based on electromagnetic field theory. It has the advantages of non-invasive, high real-time performance, and low cost. It is widely used in industrial and medical fields. During the EIT detection process, a group of electrode arrays are evenly installed or placed on the boundary of the object to be tested. During the detection process, current or voltage signals are applied to one or more electrodes, the electrical signals of other electrodes are detected, and the conductivity distribution image is reconstructed by an image reconstruction algorithm. Since the existence of a current loop is required in the EIT detection process, it must be ensured that the measured medium is a conductive substance. [0...

AI Technical Summary

Problems solved by technology

This method is unstable in actual use. For example, a loose interface or a damaged wire will cause the interruption of the connection between the electrode and the system, affecting the measurement results, and it is not easy to locate the faulty electrode.

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