Multi-Plane Electrical Resistance Tomography System Based on Parallel Data Acquisition Strategy

Electrical Resistance Tomography (ERT) obtains the characteristic of the measured object in opaque containers by measuring the change of the conductivity in the sensing field that established by injecting exciting current into measured cross-section, and reconstructs the section image through certain reconstruction algorithm. The characteristic of this technique is non-intrusive, non-radiant, visualization and etc. Multi-plane ERT system has great prospective in industrial measurement and monitoring, however, the application is restricted by its real-time performance. In this paper, the scheme of new multi-plane ERT system based on parallel data-acquisition system has been proposed. This new system uses digital EO card and high speed A/D transition card to decrease the switch time of measured signal and to improve system performance.