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Selection of excitation signals for high-impedance spectroscopy

Abstrakt

A method of fast impedance spectroscopy of technical objects with high impedance (|Zx| > 1 GOhm) is evaluated in this paper. An object is excited with a signal generated by a digital-to-analog converter (DAC) located on the U2531A DAQ module. Response signals proportional to current flowing through and voltage across the measured object are sampled by analog-to-digital converters (ADC) in the DAQ module. The object impedance spectrum is obtained with use of continuous Fourier transform on the basis of acquired signals. Different excitation signals (square, triangle, sawtooth and sinc) were compared in order to estimate the accuracy of impedance spectrum evaluation. The method is evaluated by means of simulation and practical experiment in a measuring system on an exemplary object in the form of multi-element two-terminal RC network modelling of an anticorrosion coating impedance.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
Journal of Physics : Conference Series nr 459,
ISSN: 1742-6588
Język:
angielski
Rok wydania:
2013
Opis bibliograficzny:
Kowalewski M.: Selection of excitation signals for high-impedance spectroscopy// Journal of Physics : Conference Series -Vol. 459, (2013), s.012060-
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1088/1742-6596/459/1/012060
Weryfikacja:
Politechnika Gdańska

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