Effect of Axial Guard Electrodes on Sensing Field of Capacitance Tomographic Sensor

Hui Xu#, Gang Yang and Shi Wang

PO Box 321, School of Information Science and Engineering, Northeastern University, Shenyang, 110006, P. R. China

# E-mail: cxscxsc@pub.sy.ln.cn Tel: +86 24 25416000

Abstract -an class="s6">Electrical capacitance tomography is now used in many industrial processes for visualizations. There are several types of sensor structures in using in the tomographic systems. The knowledge of their three-dimensional effects of these structures is important. In this paper the results of relevant analyses are given by use of the numerical method Finite Element Method (FEM). At last images with different sensor structures are reconstructed and the corresponding Spatial Image Errors (SIE) are given.

Keywords: electrical capacitance tomography, guard electrode, sensing field, three-dimension