Electrical Tomography, ET, is a type of tomography technique that uses specific mathematical means to inverse the distribution of electrical parameters inside the object by applying electrical excitation to the object and detecting changes in its boundary values, thus obtaining the distribution inside the object. Compared with other chromatographic imaging techniques, electrochromatography has the advantages of no radiation, fast response speed and low price.
There are four basic forms of ECT, namely, Eletrical Capacitance Tomography (ECT), Electrical Resistance Tomography (ERT), Eletromagnetic Tomography (ET), and Eletromagnetic Tomography (ECT). ECT, Electrical Resistance Tomography (ERT), Eletromagnetic Tomography (EMT), and Eletrical Impedance Tomography (EIT). Since EIT is similar to resistive tomography, there is generally no strict distinction between the two.
In particular, ECT and ERT are very similar in terms of mathematical modeling, positive and negative problem solving, and data acquisition; therefore, some researchers at home and abroad are trying to integrate these two techniques. In Europe, several research institutions, such as the former UMIST and LEEDS University, have cooperated to conduct exploratory research in this field, and through the transfer of technology, the company ITS was established to carry out the production of ECT and ERT bimodal tomographic imaging systems. However, the degree of fusion produced by its dual-modality has the limit of wow-chang-cao heap and water-glazed leather lack of palace painting, and the ECT and ERT sensors are located in different cross-sections, which makes it difficult to reflect the distribution of substances in the same cross-section.
In China, research institutions such as Tianjin University, Tsinghua University, Zhejiang University and the Chinese Academy of Sciences have also conducted research on bimodal tomography under the support of the National Natural Science Foundation of China. Among them, Tianjin University, as the project leader, has many years of experience in electrical chromatography imaging, and has developed successful single-modal ECT, ERT/EIT and EMT systems; at present, the prototype of ECT/ERT dual-modal system and the supporting software have been tested and produced, which has reached the international advanced level.
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