METHODS OF SMALL CAPACITANCE MEASUREMENT IN ELECTRICAL CAPACITANCE TOMOGRAPHY


Abstract

The paper presents the main methods of small capacitance measurement used in electrical capacitance tomography: the AC method with a sine wave excitation and the charge-discharge method with square wave excitation. Construction of synchronous detector for both circuits was discussed. A modified "charge-discharge" method was presented.


Keywords

capacitance measurement; AC method; charge-discharge method; electrical tomography

Baxter L.K.; Capacitive Sensors: Design and Applications. IEEE Press Series on Electronics Technology, 1996.

Brzeski P., Mirkowski J., Olszewski T., Pląskowski A., Smolik W., Szabatin R.: Multichannel capacitance tomograph for dynamic process imaging. Opto-Electronics Review, 2003, 175–180.

Hu H., Katsouros M., Yang W.Q., Huang S.M.: Further analysis of charge/discharge capacitance measurement circuit used with tomography sensors. Sensors & Transducers Journal, 80(6)/2007, 1246–1256.

Huang S.M., Plaskowski A.B., Xie C.G. & Beck M.S.: Capacitance-based tomographic flow imaging system. Electron. Lett., 24/1988, 418–419.

Huang M., Stott A.L., Green R.G., Beck M.S.: Electronic transducers for industrial measurement of low value capacitances. J. Phys. E: Sci. Instrum., 21/1988, 242–250.

Huang S.M., Xie C.G., Thorn R., Snowden D., Beck M.S.: Design of sensor electronics for electrical capacitance tomography. IEE Proceedings-G, 139(1)/1992, 83–88.

Kryszyn J., Smolik W., Radzik B., Olszewski T., Szabatin R.: Switchless Charge-Discharge Circuit for Electrical Capacitance Tomography. Meas. Sci. Technol. 25/2014, 115009 (9).

Lionheart W. R.: EIT reconstruction algorithms: pitfalls, challenges and recent developments. Physiol. Meas., 25/2004, 125–142.

Plaskowski A., Beck M., Thorn R., Dyakowski T.: Imaging industrial flows. Applications of electrical process tomography, IOP Publishing Ltd, 1995.

Reinecke N., Mewes D.: Recent developments and industrial research applications of capacitance tomography. Meas. Sci. Technol., 7/1996, 325–337.

Smolik W., Mirkowski J., Olszewski T., Radomski D., Brzeski P., Szabatin R.: Measurement circuit based on programmable integrators and amplifiers for electrical capacitance tomography, Kwartalnik Elektroniki i Telekomunikacji, 51/2005, 127–137.

Smolik W.T., Olszewski T., Radzik B., Szabatin R.: Switch-Less Charge-Discharge Circuit for Electrical Capacitance Volume Tomograph ET4. 6th International Symposium on Process Tomography. Cape Town, RPA, 2012.

Yang W.Q., Stott A.L., Beck M.S., Xie C.G.: Development of capacitance tomographic imaging systems for oil pipeline measurements. Rev. Sci. Instrum., 66/1995, 4326–4332.

Yang W.Q.: Hardware design of electrical capacitance tomography systems. Meas. Sci. Technol., 7/1996, 225–232.

Yang W.Q., York T.A.: New AC – based capacitance tomography system. IEE Proc-Sci. Measurement Technology, 146(1)/1999, 47–53.

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Published : 2017-03-03


Smolik, W., Kryszyn, J., Olszewski, T., & Szabatin , R. (2017). METHODS OF SMALL CAPACITANCE MEASUREMENT IN ELECTRICAL CAPACITANCE TOMOGRAPHY. Informatyka, Automatyka, Pomiary W Gospodarce I Ochronie Środowiska, 7(1), 105-110. https://doi.org/10.5604/01.3001.0010.4596

Waldemar Smolik  W.Smolik@ire.pw.edu.pl
Warsaw University of Technology, Faculty of Electronics and Information Technology, The Institute of Radioelectronics and Multimedia Technology, Nuclear and Medical Electronics Division  Poland
Jacek Kryszyn 
Warsaw University of Technology, Faculty of Electronics and Information Technology, The Institute of Radioelectronics and Multimedia Technology, Nuclear and Medical Electronics Division  Poland
Tomasz Olszewski 
Warsaw University of Technology, Faculty of Electronics and Information Technology, The Institute of Radioelectronics and Multimedia Technology, Nuclear and Medical Electronics Division  Poland
Roman Szabatin  
Warsaw University of Technology, Faculty of Electronics and Information Technology, The Institute of Radioelectronics and Multimedia Technology, Nuclear and Medical Electronics Division  Poland