Design and performance evaluation of a sensor based on electrical impedance tomography

In this paper, electrical impedance tomography (EIT), a method of imaging the interior permittivity distribution of an object by measuring current and voltage at the surface is applied for determining the shape, size and position of unwanted growth within a specified area. The model, we have developed, is used to identify the presence of such objects within the particular area and can also figure out the shape of the same. Here, small objects having different shapes and with different material permittivity are designed inside a closed region. Then a potential difference on the boundaries of the box gives rise to a surface charge density that varies depending on the permittivity distribution inside the box. By investigating at the surface charge density the shape of the different materials inside the box is determined. The overall designing and study was carried out using FEM based simulation platform.