Naslov
Electromechanical, acoustical, and thermal characterization of piezoceramic elements at different driving conditions

Autori
Franček, Petar ; Petošić, Antonio ; Horvat, Marko ; Budimir, Marko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
The 9th Congress of the Alps Adria Acoustics Association – Conference Proceedings / Mesterházy, Beáta ; Márkus, Miklós - Budimpešta : Optikai, Akusztikai, Film- és Színháztechnikai Tudományos Egyesület (OPAKFI), 2021, 67-76

ISBN
978-963-8241-74-0

Skup
9th Congress of the Alps Adria Acoustic Association

Mjesto i datum
Budimpešta, Mađarska, 23.09.2021. - 24.09.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
ultrasound, piezoceramic, electromechanical characterization, high voltage excitation

Sažetak
The results of electromechanical characterization made on piezoceramic elements are not consistent when standardized methods are used to determine the values of material parameters. When a given method is used for such a characterization, the results will depend on the excitation level and temperature. Applying excitations with different signal magnitudes (voltage, current and applied electrical power), the output characterization results (displacement, sound pressure, temperature) confirms aforementioned thesis. This paper compares the results of a method with fast frequency sweeps for full electromechanical and acoustical characterization of hard, soft, and lead-free piezoceramic bulk elements at low (1 VRMS) and high excitation levels (up to 20 VRMS) at series resonance. The temperature is tracked during measurements and the results show significant difference between the values of measured parameters (resonance frequency, electrical admittance, displacement, and pressure magnitudes changes) obtained with different measurement methods, with nonlinear and temperature effects (due to self-heating) coupled or treated separately. The increase of the excitation signal magnitude from low (1 VRMS) to high (20 VRMS) in or near resonance leads to the decrease of the input electrical admittance magnitude of up to 90% due to coupled nonlinear and temperature change effects, and the decrease of the resonance frequency up to 2%, compared to low-level resonance frequency measured at room temperature.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA