Fast high-impedance spectroscopy method using sinc signal excitation

• Autorzy: Kowalewski M. , Lentka G.
• Języki publikacji: EN

Abstrakty

EN

In this paper the method of fast impedance spectroscopy of technical objects with high impedance (|Z_x| ≥ 1 GΩ) is evaluated by means of simulation and a practical experiment. The method is based on excitation of an object with a sinc signal and sampling the response signals proportional to current flowing through and voltage across the measured impedance. The object’s impedance spectrum is obtained with the 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 the low frequency range (below 1 Hz) and the 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.

Słowa kluczowe

EN

impedance spectroscopy; sinc signal; Fourier transform; impedance analyzer

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2013
• Tom: Vol. 20, nr 4
• Strony: 645--654
• Opis fizyczny: Bibliogr. 18 poz., rys., wykr., wzory

Twórcy

autor

Kowalewski M.

• Gdansk University of Technology, Faculty of Electronics Telecommunications and Informatics, Narutowicza 11/12, 80-233 Gdansk, Poland

autor

Lentka G.

• Gdansk University of Technology, Faculty of Electronics Telecommunications and Informatics, Narutowicza 11/12, 80-233 Gdansk, Poland

Bibliografia

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