Design and Simulation of Quadrature Phase Detection in Electrical Capacitance Volume Tomography
Capacitance measurement accuracy is affected by phase conformity between signal and reference. This work describes phase detection scheme which is necessary for phase synchronization in tomography application. Core processing for calculating phase and amplitude of the detected signal was built on FPGA (Field-Programmable Gate-Array) platform. Phase shift demodulation algorithm employs IP core provided by Xilinx FPGA. Direct digital synthesizer (DDS), multiplier, accumulator, and CORDIC (coordinate rotation digital computer) modules were used as excitation-reference signal generator, signal multiplication, accumulation, and conversion to polar coordinate in order to conduct trigonometric operation respectively. Hardware design was emulated on MATLAB-Xilinx System Generator to observe its performance. Phase detection range 0-114.58o and mean absolute error 0.58o have been achieved. Data processing rate solely at digital signal stage was approximately 100data/s suitable for 32-channel electrical capacitance volume tomography (ECVT) system.
Warsito W, Marashdeh Q, Fan LS. Electrical Capacitance Volume Tomography. IEEE Sensors Journal. 2007; 7(4): 525-535.
Jiang P, Fan S, Xiong T, Huang H. Investigation on the Sensitivity Distribution in Electrical Capacitance Tomography System. TELKOMNIKA Indonesian Journal of Electrical Engineering. 2013; 11(12): 7088-7093.
Alali A. Automatic Segmentation Framework of Building Anatomical Mouse Model for Bioluminescence Tomography. TELKOMNIKA Indonesian Journal of Electrical Engineering. 2013; 11(9): 4997-5004.
Zhang H, Ren D, Du LM. A new improved data acquisition system for electrical capacitance tomography. Advanced Materials Research. 2013; 756-759: 1527-1531.
Zhang X, Wang H. Digital phase-sensitive demodulation in electrical capacitance tomography system. 7th World Congress on Intelligent Control and Automation (WCICA). 2008: 6730-6733.
Muttakin I, Yusuf A, Rohmadi, Widada W, Taruno WP. Hardware Design for Quadrature Phase Detection Algorithm in ECVT. Proceeding of the 2014 International Conference on Electrical Engineering, Computer Science and Informatics (EECSI). 2014: 232-235.
Guo-Hui W, Ji-Yang D, Bao-Jun C. The Research on Telemetry Modulation System. TELKOMNIKA Indonesian Journal of Electrical Engineering. 2013; 11(5): 2342-2350.
Jun-Suo Q. A Algorithm of Fast Digital Phase Modulation Signal Recognition. TELKOMNIKA Indonesian Journal of Electrical Engineering. 2012; 10(8): 2330-2335.
Zhou H, Xu L, Cao Z, Xu C. An alternative digital multiplication demodulation method for electrical capacitance tomography. IEEE International Instrumentation and Measurement Technology Conference (I2MTC). 2012: 1204-1209.
Zhang X, Wang H, Cui Z, Tang L. A Novel ECT System Based on FPGA and DSP. Second International Conference on Innovative Computing, Information and Control (ICICIC). 2007: 510-513.
Sutikno T, Idris NRN, Jidin AZ. Overview on Strategies and Approaches for FPGA Programming. TELKOMNIKA Indonesian Journal of Electrical Engineering. 2014; 12(2): 273-282.
Wang H, Cui Z, Xu Y, Zhang L, He Y. Digital signal processing in electrical capacitance tomography. IEEE Asia Pacific Conference on Circuits and Systems (APCCAS). 2008: 465-468.
Xu L, Zhou H, Cao Z, Yang WQ. A Digital Switching Demodulator for Electrical Capacitance Tomography. IEEE Transactions on Instrumentation and Measurement. 2013; 62(5): 1025-1033.
Ownby M, Mahmoud WH. A design methodology for implementing DSP with Xilinx® System Generator for Matlab®. Proceedings of the 35th Southeastern Symposium on System Theory. 2003: 404-408.
Article MetricsAbstract view : 544 times
PDF - 483 times
- There are currently no refbacks.
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
TELKOMNIKA Telecommunication, Computing, Electronics and Control
ISSN: 1693-6930, e-ISSN: 2302-9293
Universitas Ahmad Dahlan, 4th Campus, 9th Floor, LPPI Room
Jl. Ringroad Selatan, Kragilan, Tamanan, Banguntapan, Bantul, Yogyakarta, Indonesia 55191
Phone: +62 (274) 563515, 511830, 379418, 371120 ext. 4902, Fax: +62 274 564604