Wireless communication-based central power supply type impedance imaging measurement device

Abstract

The invention relates to a wireless communication-based central power supply type impedance imaging measurement device used for measuring a horizontal pipeline for conveying conductive fluid. The wireless communication-based central power supply type impedance imaging measurement device comprises an electrode system, a wireless repeater station, an external main unit, a voltage source and a shielding cover, wherein the electrode system comprises multiple electrode units; each electrode unit comprises a signal electrode, a power electrode, a wireless communication module, a power module, a signal control module, a high-pass filter and a signal excitation and measurement unit; the signal control module is wirelessly communicated with the outside through the wireless communication module, sends a measurement result and controls switching of the signal electrode between an excitation state and a measurement state according to a received wireless signal; the power module comprises a voltagestabilizing module and a low-pass filter; the voltage stabilizing module is connected between the shielding cover and the power electrode; an output of the voltage stabilizing module supplies power to the whole electrode unit through a power supply cable after passing through the low-pass filter.

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...

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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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