Numerical and experimental determination of impedance characteristics of PZT elements for acoustic emission sensors
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F15%3APU115115" target="_blank" >RIV/00216305:26220/15:PU115115 - isvavai.cz</a>
Výsledek na webu
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DOI - Digital Object Identifier
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Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Numerical and experimental determination of impedance characteristics of PZT elements for acoustic emission sensors
Popis výsledku v původním jazyce
The paper presents results of numerical and experimental determination of frequency dependence of electrical impedance of piezoelectric elements for use in acoustic emission sensors for nondestructive predictive diagnostics. The shape of the electrical impedance characteristic of the piezo element, especially position of electrical resonances, relates to the mechanical resonances of the sensor. Analyzed piezoelectric elements for sensors have been made from soft PZT ceramics with different shape of the elements and distribution of elec-trodes. Element shapes were thin discs, cylindrical and conical. Analysis has been firstly car-ried out numerically with finite element modeling and later on compared with experimental results obtained by measurement with precision impedance analyzer. The presented study analyzes the compliance between numerical simulations and practical measurements. With numerical simulations all applicable boundary conditions and material characteristics have been tested to successfully predict electrical impedance of real elements. Also influences of electrodes size and their placement related to the electrical impedance of the element have been investigated, especially influence of the size of the smaller electrode in off-axis non symmetrical elements (conical shape). Result of the comparison indicates the possibility to predict real electrical impedance of the sensor elements based on numerical simulations.
Název v anglickém jazyce
Numerical and experimental determination of impedance characteristics of PZT elements for acoustic emission sensors
Popis výsledku anglicky
The paper presents results of numerical and experimental determination of frequency dependence of electrical impedance of piezoelectric elements for use in acoustic emission sensors for nondestructive predictive diagnostics. The shape of the electrical impedance characteristic of the piezo element, especially position of electrical resonances, relates to the mechanical resonances of the sensor. Analyzed piezoelectric elements for sensors have been made from soft PZT ceramics with different shape of the elements and distribution of elec-trodes. Element shapes were thin discs, cylindrical and conical. Analysis has been firstly car-ried out numerically with finite element modeling and later on compared with experimental results obtained by measurement with precision impedance analyzer. The presented study analyzes the compliance between numerical simulations and practical measurements. With numerical simulations all applicable boundary conditions and material characteristics have been tested to successfully predict electrical impedance of real elements. Also influences of electrodes size and their placement related to the electrical impedance of the element have been investigated, especially influence of the size of the smaller electrode in off-axis non symmetrical elements (conical shape). Result of the comparison indicates the possibility to predict real electrical impedance of the sensor elements based on numerical simulations.
Klasifikace
Druh
D - Stať ve sborníku
CEP obor
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OECD FORD obor
20201 - Electrical and electronic engineering
Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2015
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název statě ve sborníku
Proceedings of the 22nd International Congress on Sound and Vibration
ISBN
978-88-88942-48-3
ISSN
2329-3675
e-ISSN
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Počet stran výsledku
8
Strana od-do
1-8
Název nakladatele
International Institute of Acoustic and Vibration
Místo vydání
Florencie, Itálie
Místo konání akce
Florencie
Datum konání akce
12. 7. 2015
Typ akce podle státní příslušnosti
WRD - Celosvětová akce
Kód UT WoS článku
000398997006084