Intelligent ERT system based on PXI modular instruments

Multi-phase flows are commonly encountered in the industry processes. It is very significant to monitor and test multi-phase flow. Electrical Resistance Tomography (ERT) technique has great prospective in industrial measurement and monitoring with merits of non-intrusive, non-radiant, visualization and etc. However, the application of this technique is restricted by its real-time performance. In this paper, the scheme of the intelligent ERT system based on PXI modular instruments has been proposed. The system can realize the image construction and flow information extracted with the method of multi-working mode. The result shows that, when the intelligent ERT system is working in dual-plane, the speed of each plane is 625 frames/s with 16 electrodes working mode, 1562 frames/s with 8 electrodes working mode, and 3125 frames/s with 4 electrodes working mode. The real-time performance of the system satisfies the test requirements. Through the test of multi-flow dynamic simulated experiment, the characteristic value which is extracted from the measured data of each cross section can acquire the flow features distinctly of different flow patterns.