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Abstract
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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- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.2478/mms-2013-0055
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
Metrology and Measurement Systems
no. XX,
pages 645 - 654,
ISSN: 0860-8229 - Language:
- English
- Publication year:
- 2013
- Bibliographic description:
- 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:
- Digital Object Identifier (open in new tab) 10.2478/mms-2013-0055
- Verified by:
- Gdańsk University of Technology
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