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

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JB - Sensors, detecting elements, measurement and regulation

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2013

Confidentiality

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

Article name in the collection

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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Number of pages

7

Pages from-to

1-7

Publisher name

International Institute of Acoustic and Vibration

Place of publication

USA

Event location

Bangkok

Event date

Jul 7, 2013

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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