SCI和EI收录∣中国化工学会会刊

›› 2012, Vol. 20 ›› Issue (2): 368-379.

• SELECTED PAPERS FROM THE 6TH WORLD CONGRESS ON INDUSTRIAL PROCESS TOMOGRAPHY (WCIPT6) • 上一篇    下一篇

Design of Parallel Electrical Resistance Tomography System for Measuring Multiphase Flow

董峰, 许聪, 张志强, 任尚杰   

  1. Tianjin Key Laboratory of Process Measurement and Control, School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China
  • 收稿日期:2011-12-12 修回日期:2011-12-31 出版日期:2012-04-28 发布日期:2012-05-02
  • 通讯作者: DONG Feng
  • 基金资助:
    Supported by the National Natural Science Foundation of China (51176141);the Natural Science Foundation of Tianjin(11JCZDJC22500)

Design of Parallel Electrical Resistance Tomography System for Measuring Multiphase Flow

DONG Feng, XU Cong, ZHANG Zhiqiang, REN Shangjie   

  1. Tianjin Key Laboratory of Process Measurement and Control, School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China
  • Received:2011-12-12 Revised:2011-12-31 Online:2012-04-28 Published:2012-05-02
  • Supported by:
    Supported by the National Natural Science Foundation of China (51176141);the Natural Science Foundation of Tianjin(11JCZDJC22500)

摘要: 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.

关键词: electrical resistance tomography, data acquisition, compact peripheral component interconnect, field programmable gate array, digital filter, digital demodulation

Abstract: 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.

Key words: electrical resistance tomography, data acquisition, compact peripheral component interconnect, field programmable gate array, digital filter, digital demodulation