Publication detail

A Comparison of AE Sensor Calibration Methods

KEPRT, J. BENEŠ, P.

Original Title

A Comparison of AE Sensor Calibration Methods

Type

journal article - other

Language

English

Original Abstract

The paper reviews the background of the primary calibration of acoustic emission (AE) sensors and the determination of uncertainty in the calibration. The main sources of uncertainty in practical usage of calibration results are discussed. The comparison of the results of the reciprocity primary calibration, step-force and reciprocity calibration with broadband-pulse excitation method is presented. The shape of calibration characteristics corresponds well up to 300 kHz. The calculation of the uncertainty in all the calibration methods is described. The problem of propagation of uncertainty in the fast Fourier algorithm was solved. Uncertainty of measurement by primary calibration is determined and the influence of selected sources of uncertainty for each used method of calibration is presented and practically measured results are discussed. Piezoelectric AE sensor PAC UT1000 was used as the sensor under test. The big influence on uncertainty in calibrations was the influence of remounting sensors and influence of precision of measuring device. This influence is possible to suppress by correct and precise mounting of the sensors and using of more accurate measuring device with high resolution.

Keywords

AE sensor calibration, Reciprocity calibration, Step force calibration, Uncertainty

Authors

KEPRT, J.; BENEŠ, P.

RIV year

2008

Released

1. 12. 2008

Publisher

Acoustics Emission Group Encino

Location

Encino, CA USA

ISBN

0730-0050

Periodical

Journal of Acoustic Emission

Year of study

2008

Number

26

State

United States of America

Pages from

60

Pages to

71

Pages count

11

BibTex

@article{BUT48954,
  author="Jiří {Keprt} and Petr {Beneš}",
  title="A Comparison of AE Sensor Calibration Methods",
  journal="Journal of Acoustic Emission",
  year="2008",
  volume="2008",
  number="26",
  pages="60--71",
  issn="0730-0050"
}