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- Title
One sensor source localisation of acoustic emissions in thin plates using mode analysis.
- Authors
Jeong, K.; Park, K.-J.
- Abstract
The aim of this paper is to present an acoustic emission (AE) source localisation technique for plates using only one sensor. This approach demonstrates how consideration of the modal nature of AE signals can be used to reduce the number of sensors needed in AE source localisation. The theories of a chirplet transform and modal acoustic emission (MAE) are used to analyse the propagation of elastic waves in thin plates. First, a chirplet transform and the dispersion curves of the fundamental Lamb wave modes are applied to separate the first-arrival modes and to estimate the distance between a source and a sensor. Then, an analytical model is developed to simulate their late-arrival wave packets. Finally, the correlation between the experimental and the simulated waveforms is used to estimate the location of the AE source. Experiments are performed on a steel plate using Hsu-Nielsen pencil lead break (PLB) tests to validate the proposed source localisation algorithm. The results show that the proposed algorithm can effectively localise AE sources regardless of the locations of the sources.
- Subjects
DETECTORS; ACOUSTIC localization; ACOUSTIC emission; CHIRPLET transform (Signal processing); LAMB waves
- Publication
Insight: Non-Destructive Testing & Condition Monitoring, 2019, Vol 61, Issue 5, p264
- ISSN
1354-2575
- Publication type
Article
- DOI
10.1784/insi.2019.61.5.264