A new method for waveform analysis for estimating AE wave arrival times using wavelet decomposition

Ying Ding, Robert Lewis Reuben, John Alexander Steel

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

Here we describe a new method for determination of Acoustic Emission (AE) wave arrival times for source location purposes. In complex structures or structures of small dimension, an AE source can rapidly become distorted by the presence of several modes travelling at different speeds, and through contamination by reflections and mode conversions.

Using a simple geometry of carbon-fibre reinforced plastic, the responses acquired from two-sensor and four-sensor arrays have been analysed using a variety of techniques, which are variants on identification of first arrival time and/or the arrival of the maximum intensity of the wave. The methods are compared in terms of the consistency of the velocity which is indicated at different points in the arrays, and a method based on wavelet decomposition, filtering and threshold-crossing is recommended as the most consistent and accurate method of determining arrival time. (C) 2003 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)279-290
Number of pages12
JournalNDT and E International
Volume37
Issue number4
DOIs
Publication statusPublished - Jun 2004

Keywords

  • acoustic emission
  • velocity
  • fibre
  • EMISSION SOURCE LOCATION
  • TRANSFORM

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