期刊
ULTRASONICS
卷 49, 期 2, 页码 254-262出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultras.2008.09.005
关键词
Acoustic emission; First arrival; Akaike's information criterion; Thin metal plates
资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- Japan Society for the Promotion of Sciences (JSPS)
In acoustic emission (AE) measurement, the information of the arrival time is very important for event location, event identification and source mechanism analysis. Manual picks are time-consuming and sometimes subjective, especially in the case of large volumes of digital data. Various techniques have been presented in the literature and are routinely used in practice such as amplitude threshold, analysis of the long-term average/short-term average (LTA/STA), high-order statistics or artificial neural networks. A new automatic determination technique of the first arrival times of AE signals is presented for thin metal plates. Based on Akaike's information criterion, proposed algorithm of the first arrival detection uses a specific characteristic function, which is sensitive to change of frequency in contrast to others such as envelope of the signal. The approach is applied to data sets of three different tests. Reliable results show the potential of our approach. (C) 2008 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据