Comparison of capacitors by means of a double-channel digitizer

• Autorzy: Agrez D.

Warianty tytułu

PL

Pomiary pojemności za pomocą dwukanałowego komparatora cyfrowego

• Języki publikacji: EN

Abstrakty

EN

In the paper, a comparative method of measurement of the capacitors by measuring the voltages across them and phase angle between is presented. In the analysis of errors the systematic loading effects of the connection and their elimination has been described. The reductions of the systematic and the random errors of sampling and quantization have been performed in the frequency domain. Application of the method is possible with support of the modern digital signal processors and with interpolated DFT to improve the accuracy and speed of the measurement.

PL

W pracy przedstawiono komparacyjną metodę pomiaru pojemności kondensatorów drogą pomiaru napięć i różnicy fazy. W analizie dokładności uwzględniono błędy wynikające z połączeń i podano sposób ich eliminacji. Metodą cyfrowego przetwarzania sygnałów w dziedzinie częstotliwości osiągnięto redukcję systematycznych i przypadkowych błędów próbkowania i kwantyzacji.

Słowa kluczowe

EN

measurement of capacitors; comparative method; error analysis; loading effect; leakage effect

PL

pomiary kondensatorów; metoda komparacyjna; analiza błędów

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2005
• Tom: Vol. 12, nr 3
• Strony: 275--283
• Opis fizyczny: Bibliogr. 11 poz., rys., wykr.

Twórcy

autor

Agrez D.

• University of Ljublana, Faculty of Electrical Engineering, 1001 Ljublana, Slovenia,

Bibliografia

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• 2. Pallas-Areny R., Webster J. G.: Sensors and signal conditioning, John Wiley & Sons, Inc, 2001.
• 3. Ramm G., Moser H.: New multifrequency method for the determination of the dissipation factor of capacitors and of the time constant of resistors, IEEE Transactions on Instrumentation and Measurement, 2005, vol. 54, pp. 521-524.
• 4. Bachmair H., Vollmert R.: Comparison of admittances by means of a digital double-sinewave generator, IEEE Transactions on Instrumentation and Measurement, 1980, vol. IM-29, pp. 370-372.
• 5. Award S. S., Narasimhamurthi N., Ward W. H.: Analysis, design and implementation of an AC bridge for impedance measurements, IEEE Transactions on Instrumentation and Measurement, 1994, vol. 43, pp. 894-899.
• 6. Atmanand M. A., Kumar V. J., Murti V. G. K.: A novel method of measurement of L and C, IEEE Transactions on Instrumentation and Measurement, 1995, vol. 44, pp. 898-903.
• 7. Narduzzi C, Offeli C: Real-time high accuracy measurement of multifrequency waveforms, IEEE Transactions on instrumentation and measurement, 1987, vol. 36, pp. 964-970.
• 8. Jain V. K., Collins W. L., Davis D. C.: High-accuracy analog measurements via interpolated FFT, IEEE Transactions on Instrumentation and Measurement, 1979, vol. IM-28, pp. 113-122.
• 9. Agrež D.: Weighted multi-point interpolated DFT to improve amplitude estimation of multi-frequency signal, IEEE Transactions on Instrumentation and Measurement, 2002, vol. 51, pp. 287-292.
• 10. Agrež D.: Improving Phase Estimation with Leakage Minimization, IEEE Transactions on Instrumentation and Measurement, 2005, vol. 54.
• 11. Solomon O. M.: The effects of windowing and quantization error on the amplitude of frequency-domain functions, IEEE Trans. on Instrumentation and Measurement, 1992, vol. 41, pp. 932-937.