Identification of Cracks in Copper Mines by Bell Functions Approximation in Electrical Impedance Tomography

Ryszard Sikora1, Jan Sikora2, Stefan F Filipowicz2, Zbigniew Giza and Magdalena Stasiak3

1 The Chair of Theoretical Electrotechnics and Computer Science, Technical University of Szczecin, Wl. Sikorskiego 37, 70-313 Szczecin, Poland

2 The Institute of Theory of Electrical Engineering and Electrical Measurements, Warsaw University of Technology, Koszykowa 75, 00-661 Warsaw, Poland, Email: 2xf@iem.pw.edu.pl

3 The Institute of Electrical Apparatus, Technical University of Lodz, Stefanowskiego 18/22, 90-924 Lodz, Poland

ABSTRACT

This paper presents a method of identifying cracks in the ceilings of copper mines using Electrical Impedance Tomography (EIT). A new approach was adopted based on a continuous approximation of material coefficient distribution using bell functions. The advantage of this solution is that it provides a non-invasive investigation of the whole area of the mine ceiling. The results of experiments using the new method are presented, and compared with the classical EIT approach.

Keywords Electrical Impedance Tomography, Inverse Problems, Bell Functions, Crack Identification