Expert AE signal arrival detection

0363594 - ÚT 2012 RIV CH eng J - Journal Article
Chlada, Milan - Převorovský, Zdeněk
Expert AE signal arrival detection.
International Journal of Microstructure and Materials Properties. Roč. 6, 3/4 (2011), s. 191-205. ISSN 1741-8410.
[NDT in PROGRESS /4./. Praha, 05.11.2007-07.11.2007]
R&D Projects: GA MPO(CZ) FR-TI1/274; GA ČR GA101/07/1518
Institutional research plan: CEZ:AV0Z20760514
Keywords : acoustic emission * signal arrival detection
Subject RIV: BI - Acoustics
http://www.inderscience.com/search/index.php?mainAction=search&action=record&rec_id=43215&prevQuery=&ps=10&m=or

Accurate acoustic emission (AE) source location is the primary goal of the defect analysis following the AE signal detection. The source localization is mostly based on arrival time differences of signals recorded by several transducers. Considerable signal distortion happens during the wave propagation through the solid. Inaccurate determination of signal onset and arrival time differences respectively, are the greatest sources of localization errors. Especially, in a case of higher requirements on accuracy and robustness, the results of currently used localization methods appear to be insufficient. In the paper, recently improved version of the new signal - shape based algorithm, modeling an expert system of the elastic wave arrival detection, is introduced. In many applications, this method, based on signal energy and local gravity center evolution, has been proved as rugged enough, fast and easily applicable.
Permanent Link: http://hdl.handle.net/11104/0199353