Chirp-based impedance spectroscopy of piezo-sensors

Author

Saar, T. ; Märtens, O. ; Reidla, M. ; Ronk, A.

Author_Institution

Dept. of Electron., TUT, Tallinn, Estonia

fYear

2010

fDate

4-6 Oct. 2010

Firstpage

339

Lastpage

342

Abstract

Impedance spectroscopy is widely used in various test& measurement fields and applications. In current paper a novel approach of excitation with chirp signal with simple time-domain analysis of response signal for such task is introduced and described with examples of measurement of the electro-mechanical impedance of piezo-sensors, in the frequency range of several hundred kiloherz. In one approach smoothed separately (by Savitzky-Golay filter) of excitation voltage and (current) response signals in a sliding window are found and their ratio is used for impedance module estimation, at corresponding time and frequency values. Alternative method for vector measurement of impedance spectra in time domain has also tested.

Keywords

electric impedance measurement; electric sensing devices; piezoelectric devices; Savitzky-Golay filter; chirp signal; electromechanical impedance; impedance spectroscopy; piezosensors; time domain analysis; vector measurement; Chirp; Current measurement; Frequency measurement; Impedance; Impedance measurement; Resonant frequency; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics Conference (BEC), 2010 12th Biennial Baltic

Conference_Location

Tallinn

ISSN

1736-3705

Print_ISBN

978-1-4244-7356-4

Electronic_ISBN

1736-3705

Type

conf

DOI

10.1109/BEC.2010.5630656

Filename

5630656