Device and method for sliding type multi-layer magnetic induction tomography

Abstract

The invention discloses a device and a method for sliding type multi-layer magnetic induction tomography. According to the method of sliding type multi-layer magnetic induction tomography, a measured object is put on a plate, a measuring coil array is driven to surround the measured object and the plate, the coil array can slide on the plate so that the central surface of the coil array is corresponding with different faults of the object, one magnetic induction tomography data collection is carried out when the coil array is corresponding with one fault of the object, the conductivity distribution map of the object at the fault is rebuilt through imaging algorithm, data collection can be carried out for a plurality of times by sliding the coil array or plate and a conductivity distribution map at the fault is rebuild each time, a plurality of conductivity distribution maps of the object at adjacent faults are obtained though a plurality of times of data collection and maps rebuilding, and the overall conductivity distribution condition of the object is obtained. The device and the method for sliding type multiple layer magnetic induction tomography has the advantages that conductivity distribution maps of the measured object at different faults are obtained conveniently, and multiple layer non-contact electrical impedance tomography is achieved.

Description

technical field [0001] The invention belongs to the technical field of electrical impedance tomography, and relates to a sliding multilayer magnetic induction tomography device and method. Background technique [0002] Electrical impedance is a measure of the passive electrical properties of matter. The traditional electrical impedance measurement method is to calculate the electrical impedance by respectively applying an excitation signal and measuring a response signal to a pair of electrodes in contact with the measured object. Using this basic principle, a distribution image of electrical impedance is formed by stimulating measurement data at multiple locations, and its typical representative is electrical impedance tomography. According to the principle of electromagnetic induction, alternating eddy currents of the same frequency will be induced inside the volume conductor in the alternating magnetic field, and the nature of the eddy current is directly related to the ...

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Problems solved by technology

[0004] Existing magnetic induction tomography is aimed at the imaging of a certain fixed slice, for example, the Chinese patent with the application number 200510042937.6 and the title of the invention is "Monitoring Method of Non-contact Magnetic Induction Brain Conductivity Distribution Change"; the application number is 200710092746.X, The Chinese patent with the title of invention "A high-sensitivity open magnetic induction imaging measurement device"; the Chinese patent with the application number 200680048014.4 and the title of "Magnetic Induction Tomography Imaging System and Method"; the application number 200780035345.9 and the title of the invention Method and equipment for tomography", etc., there is no report on the method of multi-layer magnetic induction tomography

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