Design of Parallel Electrical Resistance Tomography System for Measuring Multiphase Flow

• Published in: Chinese journal of chemical engineering Vol. 20; no. 2; pp. 368 - 379
• Main Author: 董峰 许聪 张志强 任尚杰
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.04.2012
• Subjects: Buses (vehicles); Compact; compact peripheral component interconnect; data acquisition; digital demodulation; digital filter; Dynamical systems; Dynamics; electrical resistance tomography; field programmable gate array; Field programmable gate arrays; FPGA; Modules; Multiphase flow; Tomography; 多相流测量; 层析成像系统; 并联电阻; 数据处理模块; 现场可编程门阵列; 设计; digital demodulation; data acquisition; digital filter; electrical resistance tomography; field programmable gate array; compact peripheral component interconnect
• ISSN: 1004-9541; 2210-321X
• DOI: 10.1016/S1004-9541(12)60400-5

ERT（electrical resistance tomography） is effective method for visualization of multiphase flows,offering some advantages of rapid response and low cost,so as to explore the transient hydrodynamics.Aiming at this target,a fully programmable and reconfigurable FPGA（field programmable gate array）-based Compact PCI（peripheral component interconnect） bus linked sixteen-channel ERT system has been presented.The data acquisition system is carefully designed with function modules of signal generator module;Compact PCI transmission module and data processing module（including data sampling,filtering and demodulating）.The processing module incorporates a powerful FPGA with Compact PCI bus for communication,and the measurement process management is conducted in FPGA.Image reconstruction algorithms with different speed and accuracy are also coded for this system.The system has been demonstrated in real time（1400 frames per second for 50 kHz excitation） with signal-noise-ratio above 62 dB and repeatability error below 0.7%.Static experiments have been conducted and the images manifested good resolution relative to the actual object distribution.The parallel ERT system has provided alternative experimental platform for the multiphase flow measurements by the dynamic experiments in terms of concentration and velocity.