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International Society for Industrial Process Tomography

8th World Congress on Industrial Process Tomography

Electrical Tomography to Examine Moisture and Condition of Buildings

Tomasz Rymarczyk 1*, Paweł Tchórzewski 1, Przemysław Adamkiewicz 1, Karol Duda 1,Jakub Szumowski 1, Jan Sikora 2,3

1*Netrix S.A., Lublin, Poland, e-mail:

2Electrotechnical Institute, Warsaw, Poland

3Institute of Electronics and Information Technology, Lublin University of Technology, Lublin, Poland


The paper presents a concept of the hybrid tomographic measurement system (measuring device and software for measurements interpretation) using electrical impedance tomography and capacitance tomography. The one resulting from herein described project will be innovative and cutting-edge solution in wall dampness level research and building condition evaluation, in terms of measurement device itself as well as in implemented routines. Application of modern tomographic techniques in conjunction with intelligent algorithms will allow to perform a non-invasive and very accurate spatial assessment of the dampness level. Electrical tomography under different names covers multiple tomographic techniques picturing electric parameters of an object placed in examined area (TAI et al. 2005, ZANG et al. 2010). In electrical capacitance tomography (ECT) it illustrates electrical permittivity ε (MARASHDEH et al. 2007, 2008), while in electrical impedance tomography (EIT) shows spatial distribution of conductivity σ. In these types of imaging a generation of electric field. Because of different principles of operation (excitation), EIT and ECT have not yet been used for simultaneous imaging of permittivity and conductivity in one measuring sensor. In the last few years attempts of solving this problem was made, as it is major issue in research of transport of granular materials having conductive-insulating composition. Authors of this application propose a new kind of combined (hybrid) imaging solution using both tomographic techniques with active surface electrodes. Although multiple methods of evaluating dampness level in brick walls exist already, there is no single universal one for use in various measurement conditions.

Keywords Electrical Impedance Tomography, Electrical Capacitance Tomography, Inverse Problem, Sensors

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