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SEDLÁK, P. HIROSE, Y. ENOKI, M.
Original Title
Acoustic emission localization in thin multi-layer plates using first-arrival determination
Type
journal article in Web of Science
Language
English
Original Abstract
In the case of thin plates, there exist two modes of propagation which travel at different velocities and exhibit dispersion characteristics. Techniques that are based on Gabor wavelet transform or cross-correlation technique are commonly used to locate acoustic emission (AE) events which occur in large plates. Due to side-edge reflections and short source-to-sensor distances, these techniques are not suitable for small plate-like specimens. If the thickness of the plate-like specimen is smaller than a specific value, the first-coming (extensional) mode will show non-dispersive behavior in AE frequency range. Under such a condition, the conventional localization method can be used for detecting first-arrival times on non-dispersive extensional mode. In previous paper, authors of the paper developed a first-arrival automatic determination technique based on Akaike information criterion (AIC) for thin metal plates. This paper compares this technique with another AIC approach, STA/LTA method (short-term average/long-term average) and a standard threshold-crossing technique. The comparative analysis includes blind tests, and is provided on four datasets recorded by a four-channel recording system. The three of four datasets were generated using two types of artificial AE sources (Hsu-Nielson source and laser impulse), while the fourth one contains real-measurement data. Each dataset corresponds to measurement made on a thin-plate specimen of a different material or geometry.
Keywords
arrival time, acoustic emission, localization, Akaike information criterion, thin plate
Authors
SEDLÁK, P.; HIROSE, Y.; ENOKI, M.
RIV year
2013
Released
3. 2. 2013
Publisher
Elsevier
ISBN
0888-3270
Periodical
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
Year of study
36
Number
2
State
United Kingdom of Great Britain and Northern Ireland
Pages from
636
Pages to
649
Pages count
14
BibTex
@article{BUT99181, author="Petr {Sedlák} and Yuichiro {Hirose} and Manabu {Enoki}", title="Acoustic emission localization in thin multi-layer plates using first-arrival determination", journal="MECHANICAL SYSTEMS AND SIGNAL PROCESSING", year="2013", volume="36", number="2", pages="636--649", doi="10.1016/j.ymssp.2012.11.008", issn="0888-3270" }