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Fast High-Impedance Spectroscopy Method Using SINC Signal Excitation

Abstrakt

In this paper the method of fast impedance spectroscopy of technical objects with high impedance (|Zx| > 1 Gohm) is evaluated by means of simulation and practical experiment. The method is based on excitation of an object with a sinc signal and sampling response signals proportional to current flowing through and voltage across the measured impedance. The object impedance spectrum is obtained with use of continuous Fourier transform on the basis of linear approximations between samples in two acquisition sections, connected with the duration of the sinc signal. The method is first evaluated in MATLAB by means of simulation. An influence of the sinc signal duration and the number of samples on impedance modulus and argument measurement errors is explored. The method is then practically verified in a constructed laboratory impedance spectroscopy measurement system. The obtained acceleration of impedance spectroscopy in low frequency range (below 1 Hz) and decrease of the number of acquired samples enable to recommend the worked out method for implementation in portable impedance analyzers destined for operation in the field.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
Metrology and Measurement Systems nr XX, strony 645 - 654,
ISSN: 0860-8229
Język:
angielski
Rok wydania:
2013
Opis bibliograficzny:
Kowalewski M., Lentka G.: Fast High-Impedance Spectroscopy Method Using SINC Signal Excitation// Metrology and Measurement Systems. -Vol. XX, nr. 4 (2013), s.645-654
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.2478/mms-2013-0055
Weryfikacja:
Politechnika Gdańska

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