Delta T source location for acoustic emission

Baxter, Geoff, Pullin, Rhys ORCID: https://orcid.org/0000-0002-2853-6099, Holford, Karen Margaret ORCID: https://orcid.org/0000-0002-3239-4660 and Evans, Samuel Lewin ORCID: https://orcid.org/0000-0003-3664-2569 2007. Delta T source location for acoustic emission. Mechanical systems and signal processing 21 (3) , pp. 1512-1520. 10.1016/j.ymssp.2006.05.003

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Abstract

Acoustic emission (AE) source location provides a powerful tool for the engineer. Current methods, time of arrival (TOA) location and single sensor modal analysis location (SSMAL), are based on assumptions derived from a simplistic structure. In complex geometric structures these assumptions are incorrect. This paper describes a novel solution for AE source location in complicated geometric structures. “Delta T� source location utilises an artificial source; recording differences in times of arrival information from a number of locations, to improve source location. This method does not require knowledge of the sensor location or wavespeed. A 5-step description of the process is provided and practical results from an initial trial are presented. Results from the initial trial demonstrated a considerable improvement over the conventional TOA source location method, with a reduction in location error from 4.81% using the conventional TOA technique, to 1.77% using “Delta T� location.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering Centre for Advanced Manufacturing Systems At Cardiff (CAMSAC)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords:	Acoustic emission; Source location
Publisher:	Elsevier
ISSN:	0888-3270
Last Modified:	05 Jan 2024 06:10
URI:	https://orca.cardiff.ac.uk/id/eprint/2068

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