München 2004 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
UP: Umweltphysik
UP 7: Hydrosph
äre und Boden I
UP 7.1: Fachvortrag
Monday, March 22, 2004, 14:15–14:30, HS 020
Direct estimation of soil properties by using a modified electrical impedance tomography — •H. Lustfeld1, A. Kemna2, and G. Bene3 — 1Forschungszentrum Jülich, IFF, 52425 Jülich, e-mail: h.lustfeld@fz-juelich.de — 2Forschungszentrum Jülich, ICG IV, 52425 Jülich, e-mail: a.kemna@fz-juelich.de — 3Institute for Theoretical Physics, Eötvös University, Pázmány Péter sétány 1/A, H-1117 Budapest, Hungary, e-mail: bene@arpad.elte.hu
A major difficulty of electrical impedance tomography (EIT) is the
ill-conditioned inverse problem when determining the
conductivity from voltage measurements[1,2].
However, not the conductivity is of real
interest but the properties of soil/biological tissue.
It means that only certain Cole-Cole parameters can appear which
are typical of the various kinds of soil/biological tissue.
In our approach only these parameters occur in the
cost function thus reducing the parameter space tremendously
and as a consequence leading to much more stable solutions
in multifrequency EIT.
[1] A. Kemna, A. Binley, A. Ramirez, W. Daily, Chem. Engng. J. 77, 11 (2000)
[2] A. Kemna, J. Vanderborght, B. Kulessa, H. Vereecken, J. Hydrol. 267, 125 (2002)