Abstract
Piezo impedance spectroscopy is widely used in structural health monitoring (SHM) applications. Purpose of the research was tofind most robust and cheap method for impedance magnitude measurement. Proposed system consists of analog front end (AFE), signalsynthesizer and microcontroller unit. AFE enables to use low sampling rate, while using high frequency excitation signal. Proposedsystem uses chirp excitation signal in 20kHz- 600kHz frequency range. Results were compared against measurements made withcommercial impedance analyzer. Results show great potential for this method in SHM applications. Ill. 6, bibl. 10 (in English; abstractsin English and Lithuanian). http://dx.doi.org/10.5755/j01.eee.113.7.623
Highlights
In SHM applications piezoelectric transducer (PZT) impedance measurement is widely used for condition monitoring
In SHM applications PZT impedance measurement is widely used for condition monitoring
E/M impedance method is more effective in SHM application than other more conventional methods [3]
Summary
In SHM (structural health monitoring) applications PZT (lead zirconate titanate) impedance measurement is widely used for condition monitoring. For example load changes on host structure (bridges, walls, windmills blades etc) can cause false measurement results. To minimize this measurement time should be as short as possible. Work [4] described procedures for determination of frequency ranges where the PZT transducers are more sensitive for damage detection. In paper [8] a novel approach of excitation with chirp signal with simple time-domain analysis of response signal for such task was introduced and described with examples of measurement of the electro-mechanical impedance of piezosensors, in the frequency range of several hundred kilohertz. In papers [9, 10] interface for impedance spectroscopy measurements of piezo-sensors was developed, for a digital signal processor of Delfino series of Texas Instruments. High-performance analog interface was” improvised” (developed and investigated) with a frequency range 10 kHz -400 kHz about 0,1% of the full scale resolution and repeatability of measurements
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
