Detail publikace

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

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

Originální název

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

Anglický název

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

Jazyk

en

Originální abstrakt

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.

Anglický abstrakt

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.

Dokumenty

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",
  annote="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.",
  address="International Institute of Acoustic and Vibration",
  booktitle="Proceedings of the 20th International Congress on Sound and Vibration",
  chapter="99744",
  howpublished="electronic, physical medium",
  institution="International Institute of Acoustic and Vibration",
  year="2013",
  month="july",
  pages="1--7",
  publisher="International Institute of Acoustic and Vibration",
  type="conference paper"
}