WU Zeyu,LIU Zuoqiu,WANG Li.Electrical impedance imaging for cavity detection[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(02):100-105.
WU Zeyu,LIU Zuoqiu,WANG Li.Electrical impedance imaging for cavity detection[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(02):100-105. DOI: 10.13471/j.cnki.acta.snus.2020B094.
Electroimpedance tomography (EIT) is a typical inverse problem in karst cave detection
which is ill-posedness and very sensitive to measurement error. In order to overcome the defect of ill-posedness, the regularization method should be introduced. In this paper, we mainly consider Tikhonov regularization and sparse regularization. Then, two different methods-linear approximate direct solving method and iterative solution method is used to solve the problem. And, EIT is used to detect underground karst caves
because of some advantages, such as relatively simple equipment, convenient data acquisition and insensitive to material inhomogeneity.Finally, a numerical example is given to compare the effects of these methods.
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