Experimental methods for testing active element of piezoelectric knock sensor by using temperature dependences

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F13%3APU103689" target="_blank" >RIV/00216305:26620/13:PU103689 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Experimental methods for testing active element of piezoelectric knock sensor by using temperature dependences

Popis výsledku v původním jazyce

The paper describes experimental researches on vibration piezoelectric sensor. The main aim of work is to compare temperature effect on piezoelectric material coefficients, the influence on the resonant frequency of piezoelectric knock sensor and changes these parameters on the sensitivity and accuracy of sensors. The purpose of the research is to fault diagnosis of active piezoelectric element for self-diagnostics of sensor in normal engine operation, because online health monitoring of knock sensors can prevent engine damage. Temperature changes significantly affect the material properties of the active element from PZT ceramics. Temperature deviations are compared on the impedance characteristics in the working temperature range of engine and also related to different types of sensor damage. Depending on the material defects (microcracks, fissure) and changes in the material coefficients related to the frequency characteristic can assess the degree of damage sensors and the prediction quality piezoelement inside the sensor. The foregoing, to some extent, may be referred to in calculations of some structural elements of knock sensors. The experimental comparison results are conducted and will be shown. A series of experiments were conducted on a prototype knock sensor, where was changed piezoelectric elements with different number of cracks. The experiments demonstrate that the proposed experimental methods can be used for mentioned purpose and eliminate damage the engine by vibrations.

Název v anglickém jazyce

Experimental methods for testing active element of piezoelectric knock sensor by using temperature dependences

Popis výsledku anglicky

The paper describes experimental researches on vibration piezoelectric sensor. The main aim of work is to compare temperature effect on piezoelectric material coefficients, the influence on the resonant frequency of piezoelectric knock sensor and changes these parameters on the sensitivity and accuracy of sensors. The purpose of the research is to fault diagnosis of active piezoelectric element for self-diagnostics of sensor in normal engine operation, because online health monitoring of knock sensors can prevent engine damage. Temperature changes significantly affect the material properties of the active element from PZT ceramics. Temperature deviations are compared on the impedance characteristics in the working temperature range of engine and also related to different types of sensor damage. Depending on the material defects (microcracks, fissure) and changes in the material coefficients related to the frequency characteristic can assess the degree of damage sensors and the prediction quality piezoelement inside the sensor. The foregoing, to some extent, may be referred to in calculations of some structural elements of knock sensors. The experimental comparison results are conducted and will be shown. A series of experiments were conducted on a prototype knock sensor, where was changed piezoelectric elements with different number of cracks. The experiments demonstrate that the proposed experimental methods can be used for mentioned purpose and eliminate damage the engine by vibrations.

Druh

D - Stať ve sborníku

CEP obor

JB - Senzory, čidla, měření a regulace

OECD FORD obor

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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

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 20th International Congress on Sound and Vibration

ISBN

978-616-551-682-2

ISSN

2329-3675

e-ISSN

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Počet stran výsledku

7

Strana od-do

1-7

Název nakladatele

International Institute of Acoustic and Vibration

Místo vydání

USA

Místo konání akce

Bangkok

Datum konání akce

7. 7. 2013

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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