Hardware Design for Quadrature Phase Detection Algorithm in ECVT

Imamul Muttakin, Arbai Yusuf, Rohmadi ., Wahyu Widada, Warsito P. Taruno


Core processing for calculating phase andamplitude of the detected signal was built on FPGA (Field-Programmable Gate-Array) platform. Phase shift demodulationalgorithm employs IP core provided by Xilinx FPGA. Directdigital synthesizer (DDS), multiplier, accumulator, and CORDIC(coordinate rotation digital computer) modules were used asexcitation-reference signal generator, signal multiplication,accumulation, and conversion to polar coordinate in order toconduct trigonometric operation respectively. Hardware designwas emulated on MATLAB-Xilinx System Generator to observeits performance. Phase detection range 0-114.58o and meanabsolute error 0.58o have been achieved. Data processing ratesolely at digital signal stage was approximately 100data/s suitablefor 32-channel ECVT (electrical capacitance volumetomography) system.


quadrature demodulation; phase detection; system generator; FPGA; ECVT


Warsito, W.; Marashdeh, Q.; Fan, Liang-Shih, “Electrical Capacitance Volume Tomography,” Sensors Journal, IEEE , vol.7, no.4, p.525,535, April 2007

H. Zhang, D. Ren, L. M. Du, “A new improved data acquisition system for electrical capacitance tomography,” Advanced Materials Research, vol. 756-759, pp. 1527-1531, September 2013.

Xuehui Zhang; Huaxiang Wang, “Digital phase-sensitive demodulation in electrical capacitance tomography system,” Intelligen Control and Automation, 2008. WCICA 2008. 7th World Congress on , vol., no., pp.6730,6733, 25-27 June 2008

Haili Zhou; Lijun Xu; Zhang Cao; Chenfeng Xu, “An alternative digital multiplication demodulation method for electrical capacitance

tomography,” Instrumentation and Measurement Technology Conference (I2MTC), 2012 IEEE International , vol., no., pp.1204,1209, 13-16 May 2012

Xuehui Zhang; Huaxiang Wang; Ziqiang Cui; Lei Tang, “A Novel ECT System Based on FPGA and DSP,” Innovative Computing, Information and Control, 2007. ICICIC '07. Second International Conference on , vol., no., pp.510,510, 5-7 Sept. 2007

Huaxiang Wang; Ziqiang Cui; Yanbin Xu; Lifeng Zhang; Yongbo He, “Digital signal processing in electrical capacitance tomography,” Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on , vol., no., pp.465,468, Nov. 30 2008-Dec. 3 2008

Lijun Xu; Haili Zhou; Zhang Cao; Wuqiang Yang, “A Digital Switching Demodulator for Electrical Capacitance Tomography,” Instrumentation and Measurement, IEEE Transactions on , vol.62, no.5, pp.1025,1033, May 2013

Ownby, M.; Mahmoud, W.H., “A design methodology for implementing DSP with Xilinx® System Generator for Matlab®,” System Theory, 2003. Proceedings of the 35th Southeastern Symposium on , vol., no., pp.404,408, 16-18 March 2003

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