Detail publikace

Acoustic emission localization in thin multi-layer plates using first-arrival determination

SEDLÁK, P. HIROSE, Y. ENOKI, M.

Originální název

Acoustic emission localization in thin multi-layer plates using first-arrival determination

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

arrival time, acoustic emission, localization, Akaike information criterion, thin plate

Autoři

SEDLÁK, P.; HIROSE, Y.; ENOKI, M.

Rok RIV

2013

Vydáno

3. 2. 2013

Nakladatel

Elsevier

ISSN

0888-3270

Periodikum

MECHANICAL SYSTEMS AND SIGNAL PROCESSING

Ročník

36

Číslo

2

Stát

Spojené království Velké Británie a Severního Irska

Strany od

636

Strany do

649

Strany počet

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"
}