Control method of centralized power supply type electric impedance imaging electrode system

Abstract

The invention relates to a control method of a centralized power supply type electric impedance imaging electrode system. The electrode system comprises a plurality of electrode units, wherein 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, a signal excitation and measurement unit. The control method of each electrode unit comprises the following steps that the signal control module of the electrode unit controls the switching of a excitation state and a measurementstate of the signal electrode according to a received external wireless signal; a signal excitation and measurement module generates a high-frequency signal under an excited state of the electrode unit, and transmits the high-frequency signal to the signal electrode through the high-pass filter, so that the signal electrode is in an excitation state; and the signal electrode is in a measurement state under a measurement state of the electrode unit, high-frequency excitation signals of the other electrodes is transmitted to the signal electrode through an in-tube conducting medium, and is inputted to the signal excitation and measurement module though the high-pass filter to obtain a measurement result.

Description

technical field [0001] The invention relates to a wireless communication-based central power supply type electrical impedance imaging measurement 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. ...

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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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