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Citation: XU Kang, TAN Chao, WU Hao, et al. Electrical capacitance tomography system design based on industrial bus standard[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(11): 2338-2344. doi: 10.13700/j.bh.1001-5965.2017.0049(in Chinese)

Electrical capacitance tomography system design based on industrial bus standard

doi: 10.13700/j.bh.1001-5965.2017.0049
Funds:

National Natural Science Foundation of China 61227006

National Natural Science Foundation of China 61473206

National Natural Science Foundation of China 6151101270

More Information
  • Corresponding author: TAN Chao, E-mail: tanchao@tju.edu.cn
  • Received Date: 03 Feb 2017
  • Accepted Date: 17 Mar 2017
  • Publish Date: 20 Nov 2017
  • To ensure that the electrical capacitance tomography (ECT) system meets the requirements of multiphase flow parameter measurement in aerospace field, an ECT system based on the CPCI industrial bus standard is designed. A high-performance field-programmable gate array (FPGA) chip is used as the main control chip to realize the integrated design of signal excitation module, multiplex switch module, data processing module, data demodulation and transmission module. The signal is preprocessed with signal filtering, amplification and phase-sensitive demodulation, and then the demodulated capacitance data is transferred to the host computer through the CPCI industrial bus interface. Finally, the image is reconstructed in the host computer. The experimental results of ECT system show that the image acquisition speed can reach 1 785 frames per second at 1 MHz excitation signal with 8 electrode sensor and 10-cycle test signal for demodulation. The system can operate under a SNR of above 60 dB, while the imaging results have good spatial resolution.

     

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