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Acoustic emission source localization in thin metallic plates: A single-sensor approach based on multimodal edge reflections
Journal article   Peer reviewed

Acoustic emission source localization in thin metallic plates: A single-sensor approach based on multimodal edge reflections

A. Ebrahimkhanlou and S. Salamone
Ultrasonics, v 78, pp 134-145
01 Jul 2017
DOI: https://doi.org/10.1016/j.ultras.2017.03.006
PMID: 28347871
url
https://doi.org/10.1016/j.ultras.2017.03.006View
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Abstract

Acoustics Life Sciences & Biomedicine Radiology, Nuclear Medicine & Medical Imaging Science & Technology Technology
This paper presents a new acoustic emission (AE) source localization for isotropic plates with reflecting boundaries. This approach that has no blind spot leverages multimodal edge reflections to identify AE sources with only a single sensor. The implementation of the proposed approach involves three main steps. First, the continuous wavelet transform (CWT) and the dispersion curves of the fundamental Lamb wave modes are utilized to estimate the distance between an AE source and a sensor. This step uses a modal acoustic emission approach. Then, an analytical model is proposed that uses the estimated distances to simulate the edge-reflected waves. Finally, the correlation between the experimental and the simulated waveforms is used to estimate the location of AE sources. Hsu-Nielsen pencil lead break (PLB) tests were performed on an aluminum plate to validate this algorithm and promising results were achieved. Based on these results, the paper reports the statistics of the localization errors. (C) 2017 Elsevier B.V. All rights reserved.

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Web of Science research areas
Acoustics
Radiology, Nuclear Medicine & Medical Imaging
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