New methods to determine moisture areas by electrical impedance tomography

Abstract

New nondestructive methods of the flood embankment dampness were tested. Electrical impedance tomography was used to determine the moisture of the test flood blank on a specially built model. Numerical methods of the shape and the topology optimization were based on the level set representation and the shape differentiation. They made possible to change topology during the optimization. Level set method and Gauss-Newton method have been applied very successfully in many areas of the scientific modelling. These approaches were based on shape sensitivity include the boundary design of the elastic interface. The finite element method has been used to solve the forward problem. The proposed solution algorithms are initialized by using the topological sensitivity analysis. Shape derivatives and material derivatives have been incorporated with the level set method to investigate the shape optimization problem. The coupled algorithms are a relatively new procedure to overcome this problem. Using the line measurement is very useful to solve the inverse problem in the flood embankment.

Keywords

Electrical impedance tomography inverse problem level set method Gauss-Newton

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