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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
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" }