Publication detail

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

KLUSÁČEK, S. FIALKA, J. HAVRÁNEK, Z. BENEŠ, P.

Original Title

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

Type

conference paper

Language

English

Original Abstract

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.

Keywords

Technical diagnostics, condition monitoring, sensor self-diagnostic, vibration, accelerometer, piezoelectric sensor, knock sensor, calibration, piezoceramic, cracks, microcracks, impedance measurement, frequency response

Authors

KLUSÁČEK, S.; FIALKA, J.; HAVRÁNEK, Z.; BENEŠ, P.

RIV year

2013

Released

7. 7. 2013

Publisher

International Institute of Acoustic and Vibration

Location

USA

ISBN

978-616-551-682-2

Book

Proceedings of the 20th International Congress on Sound and Vibration

ISBN

2329-3675

Periodical

International Journal of Acoustic and Vibration

State

United States of America

Pages from

1

Pages to

7

Pages count

7

BibTex

@inproceedings{BUT99744,
  author="Stanislav {Klusáček} and Jiří {Fialka} and Zdeněk {Havránek} and Petr {Beneš}",
  title="Experimental methods for testing active element of piezoelectric knock sensor by using temperature dependences",
  booktitle="Proceedings of the 20th International Congress on Sound and Vibration",
  year="2013",
  journal="International Journal of Acoustic and Vibration",
  pages="1--7",
  publisher="International Institute of Acoustic and Vibration",
  address="USA",
  isbn="978-616-551-682-2",
  issn="2329-3675"
}