| Citation: | YUE Yuanli, LIU Ze, WU Jianli, et al. Optimization for settings of sensor array in electromagnetic tomography[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(2): 430-438. doi: 10.13700/j.bh.1001-5965.2019.0246(in Chinese)
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The settings of the sensor array in electromagnetic tomography (EMT) determine the number of induced voltages, which have an important influence on reconstructed image quality. To study the effect of the settings of coils on the quality of reconstructed images, the number and the position of the sensor array are discussed for optimization. In this paper, the models with different numbers of coils and different contributions are established by using COMSOL Multi-physics; the different algorithms are used to image reconstruction and the quality of the constructed images was compared by correlation coefficient. The simulation shows that the image quality improved by increasing the number of sensors, but when increased to a certain number, the image quality will become worse if the number of the coils continue to increase. In order to increase the measurement data instead of increasing the number of the sensor array, the sensor array is rotated. By comparing the image quality before and after rotation, the result shows that the quality of the reconstructed image is obviously improved after the combination. The simulation results can be a guide for the settings of the sensor array in the design of the EMT system in future work.
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