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Rapid parallel exciting apparatus and method for electromagnetic chromatographic imaging system

A technology of electromagnetic tomography and excitation device, which is applied in the direction of material analysis using radiation, can solve the problem of low excitation field velocity, etc., and achieves the effect of increasing excitation speed, fast speed, and expanding application range

Inactive Publication Date: 2005-02-23
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the disadvantage of low excitation field speed generated by existing excitation methods, and provide a fast parallel excitation device and method for an electromagnetic tomography system, which can meet the requirements of the establishment of the excitation field and the rotation speed of the electromagnetic tomography system. requirements, improve the image reconstruction speed of the whole system

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  • Rapid parallel exciting apparatus and method for electromagnetic chromatographic imaging system
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  • Rapid parallel exciting apparatus and method for electromagnetic chromatographic imaging system

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing, the implementation of the present invention is described in detail as follows:

[0026] Fast parallel excitation setup for electromagnetic tomography such as figure 1 As shown, it includes a computer, an electrically erasable programmable read-only memory EEPROM, an excitation control circuit, 16 excitation coils arranged equidistantly along the circumference of the sensor to form an excitation coil array, and an excitation reference signal generator. The address signal lines and output signal control lines of EEPROM11-18 are connected in parallel respectively, and the parallel terminals are connected with computer 1. The data output signal lines of EEPROM11-18 are respectively connected with excitation control circuits 21-28, and the excitation control circuits 21-28 are connected with excitation coil arrays respectively. The two excitation coils in the computer are connected, and the computer 1 is connected with the exci...

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Abstract

A method for fast-parallel exciting imaging system of electromagnetic chromatography includes storing multigroup excitation matrix information into eight pieces of EEPROM in bit width of eight digits in advance, controlling signal, excitation control circuit and coil array of EEPROM with computer for realizing fast-parallel excitation to increase speed by eight times comparing to individual excitation in sequence. A device of the method is also disclosed.

Description

technical field [0001] The invention relates to a measuring and processing device for spatial distribution of electromagnetic substances and an excitation control method thereof, in particular to an excitation device and method for an electromagnetic tomography imaging system. Background technique [0002] Electromagnetic Tomography (EMT) is a new process tomography technology based on the principle of electromagnetic induction developed in the early 1990s. It can reconstruct the measured space in a non-contact and non-intervention way. An image of the distribution of substances with electromagnetic properties in . This technology uses an external AC excitation magnetic field to sweep the measured object field with conductive or magnetic material distribution from different observation angles. Based on the principle of electromagnetic induction, the magnetic material in the object field will form an induced magnetic field, while the conductive material will Eddy currents ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/04
Inventor 刘泽
Owner BEIJING JIAOTONG UNIV
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