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A new transducer of double processing for capacitive tomography

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The paper presents a new solution of a system for the measurement of small capacities, applied in capacitive tomography. Some known versions of transducers have been discussed. Next, the author has presented his own solution, using a transducer of double processing. In the first step, capacity is changed into frequency, and next the frequency is changed into voltage. The change of capacity to frequency provides introduction of the measuring capacity into the resonant system of a generator. Small capacity changes in the capacitive tomograph influence the changes of the frequency generated by the generator. The proposed solution provides a far better stability of the measurement results related to typical solutions applied in capacitive tomography. The paper presents results of the tests performed for some systems and the obtained results were compared.
Słowa kluczowe
Rocznik
Strony
291--305
Opis fizyczny
Bibliogr. 12 poz., rys., wykr.
Twórcy
autor
  • Technical University of Opole, Chair of Thermal Engineering and Industrial Facilities, Poland, mrz@po.opole.pl
Bibliografia
  • 1. Kühn F. T., Schouten J. C., Mudde R. F., van den Bleek C. M., Scarlett B.: Analysis of chaos in fluidization using electrical capacitance tomography, Measurement Science and Technology no. 7, pp. 361–368, 1996.
  • 2. Dyakowski T., Mann R., Williams R. A.: Application of Electrical Tomography for Multi-phase Flow Measurements, Third International Conference on Multiphase Flow, ICMF‘98. Lyon France 8–12 June 1998.
  • 3. Kühn F. T.: Electrical Capacitance Tomography, Homburg 1998.
  • 4. Harteveld W. K., van Halderen P. A., Mudde R. F., van den Bleek C. M., van den Akker H. E. A., Scarlett B.: A Fast Active Differentiator Capacitance Transducer for Electrical Capacitance Tomography, 1st World Congress on Industrial Process Tomography, Buxton, Greater Manchester, 14–17 April 1999, pp. 564–417.
  • 5. Yang W. Q.: Advance in AC-based Capacitance Tomography System, 2nd World Congress on Industrial Process Tomography, Hannover, Germany, 29–31 August 2001, pp. 557–564.
  • 6. Wang B., Huang Z., Li H.: A Novel Capacitance Measurement Circuit for Electrical Capacitance Tomography, 2nd World Congress on Industrial Process Tomography, Hannover, Germany, 29–31 August 2001, pp. 580–585.
  • 7. Pląskowski A., Beck M. S., Thorn R., Dyakowski T.: Imaging Industrial Flows Aplication of Electrical Process Tomography, Institute of Physics Publishing Bristol and Philadelphia, Bristol 1995.
  • 8. Jaworek A.: Capacitive method of measurement of phase content in two-phase flow, Pomiary Automatyka Kontrola no. 11/1994, (in Polish)
  • 9. Rząsa M. R.: Application of the capacity-to-frequency converter in the capacitance tomograph, 4th World Congress on Industrial Process Tomography, Aizu, Japan, pp. 75–81, 2005.
  • 10. Williams R. A., Beck M. S.: Process Tomography Principles, Techniques and Applications, Butterworth-Heinemann, Manchester 1995.
  • 11. Yang W. Q., Peng L.: Image reconstruction algorithms for electrical capacitance tomography, Meas. Sci. Technol. vol. 14, no. 1, pp. R1–R13.
  • 12. Brzeski P., Mirkowski J., Olszewski T., Pląskowski A., Smolik W., Szabatin R.: Multichannel Capacitance Tomograph for Dynamic Process Imaging, Optoelectronics Review 2003, 11(3), pp. 175–180.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BSW1-0033-0010
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