Design of a thermal wattmeter in the audio frequency range

• Autorzy: Pogliano U. , Trinchera B. , Bosco G. , Serazio D.
• Języki publikacji: EN

Abstrakty

EN

This paper describes the development of a system for the measurement of power in the audio frequency range. Flexible units operating with a strategy based on the evaluation of rms quantity by a thermal method have been constructed. For each unit of the set-up, measurements and a preliminary characterization have been performed. The main quantities to be measured are two voltages, difference and sum. The difference voltage has been evaluated by means a vectorial voltmeter, instead the sum voltage by means a rms voltmeter. The module of the voltage difference in the acoustic band seems to be lower than 10 μV. Further investigation and results will be extended when all components of the measuring system will be employed together.

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2008
• Tom: Vol. 15, nr 4
• Strony: 563--569
• Opis fizyczny: Bibliogr. 7 poz., fot., rys., wykr.

Twórcy

autor

Pogliano U.

autor

Trinchera B.

autor

Bosco G.

autor

Serazio D.

• Istituto Nazionale di Ricerca Metrologica (I.N.RI.M.), Torino, Italy,

Bibliografia

• 1. Filipski P. S., So E., Moore W. J. M., Knight R. B. D., Martin P., Oldham N. M., Waltrip B. C.: “An International Comparison of low Audio Frequency Power Meter Calibrations Conduced in 1989”. IEEE Trans. Instrum. Meas., vol. 40, no. 6, pp. 399-402, 1991.
• 2. Pickering J. R., Wright P. S.: “A New Wattmeter for Traceable Power Measurements at audio Frequencies ” IEEE Trans. Instrum. Meas., vol. 44, no. 2 pp. 429-432, 1995.
• 3. Clark F. J. J., Stockton J. R.: “Principles and theory of wattmeters operating on the basis of regularly spaced samples pairs”. J. Phys. E: Scientific Instruments, vol. 15, no. 6, pp. 645-652, 1982.
• 4. Stenbakken G. N, Dolev A.: “High-Accuracy Sampling Wattmeter”. IEEE Trans. Instrum. Meas., vol. 41, no. 6, pp. 974-978, 1992.
• 5. Eard L., Knosp R., Soucek R.: “Improvement in the Use of the Thermal Wattmeter: Application to a Broad-Band Device for Nonsinusoidal Waveform”. IEEE Trans. Instrum. Meas., vol. IM-36, no. 2, pp. 375-379, 1987.
• 6. Pogliano U., Trinchera B., “RMS Voltage Measuring System for Precise Evaluation of Electric Quantities”. Metrology end Measurement Systems, vol. 14, no. 4, 2007.
• 7. Pogliano U., Bosco G., Lanzillotti M., Sarazio D., “AC-DC Transfer Shunts for Frequency up to 1 MHz”. Proceedings of the 15th IMEKO TC 4 International Symposium, vol. 1, pp. 132-136, 2007.