Antenna automatic matching system and method for magnetic induction tomography

Abstract

The invention relates to an antenna automatic matching system for magnetic induction tomography. The antenna automatic matching system is in an exciting branch circuit and comprises a multiplex cable; the input end of the multiplex cable is respectively coupled with a corresponding interface of a gating module and the output end of a master communication configuration module; the output end of the multiplex cable is respectively coupled with a matching network and a slave communication configuration module; a first frequency selection circuit is coupled between the corresponding interface of the gating module and the output end of the multiplex cable; the matching network and the output end of the multiplex cable are coupled with a second frequency selection circuit; the data receiving end of the slave communication configuration module and the output end of the multiplex cable are coupled with a third frequency selection circuit; a fourth frequency selection circuit is coupled between the data sending end of the main communication configuration module and the input end of the multiple cable; the power supply end of the slave communication configuration module is directly connected with the output end of the multiple cable; the antenna automatic matching system is provided with a feeding module; and the feeding module is coupled to the input end of the multiplex cable, is coupled with an external power supply and outputs a power supply current to the slave communication configuration module.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic sensors, and in particular relates to an antenna automatic matching system for magnetic induction imaging and a method thereof. Background technique [0002] Electrical impedance imaging technology is based on the fact that different biological tissues have different resistivity characteristics, and changes in pathophysiological functions will also significantly change the characteristics of tissue electrical impedance characteristics. It is a new type of medical imaging technology that uses completely non-invasive alternating current, measures the response voltage signal on each relevant electrode pair, and then constructs an image that can reflect the distribution of tissue resistivity in the target area through a specific image reconstruction algorithm. Since the resistivity of living tissue is closely related to the functional state of the tissue, electrical impedance imaging technolog...

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Problems solved by technology

[0004] At present, in the actual operation of the existing technology, if the detection is applied in the field of medicine or precision objects, the detection accuracy required is relatively high. Therefore, before the entire instrument starts working, it is necessary to detect and adjust the working parameters of the coil. The electromagnetic environment and detection are adjusted to the most reasonable matching degree, but the structure topology of the existing excitation system for the coil is as follows figure 1 As shown, the excitation current is provided to the coil through a coaxial cable. If it is necessary to increase the function of adjusting configuration parameters, it is easier to think of increasing the number of cables and transmitting configuration data by increasing the interface. However, every increase in the number of cables will affect the transmission and reception of electromagnetic waves. If it is aimed at coil probes with 16-port output, if it is necessary to complete the parameter configuration, such as figure 2 As shown, in principle, 16 sets of cables need to be added, and the impact on wiring and detection can be imagined

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