期刊
ULTRASONICS
卷 52, 期 6, 页码 740-746出版社
ELSEVIER
DOI: 10.1016/j.ultras.2012.01.017
关键词
Lamb wave; Acoustic emission; Passive monitoring; Anisotropic plate; Source localization
资金
- National Science Foundation [CMMI 1044018]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1044018] Funding Source: National Science Foundation
The conventional triangulation technique cannot locate the acoustic source in an anisotropic plate because this technique requires the wave speed to be independent of the propagation direction which is not the case for an anisotropic plate. All methods proposed so far for source localization in anisotropic plates require either the knowledge of the direction dependent velocity profile or a dense array of sensors. In this paper for the first time a technique is proposed to locate the acoustic source in large anisotropic plates with the help of only six sensors without knowing the direction dependent velocity profile in the plate. Experimental results show that the proposed technique works for both isotropic and anisotropic structures. For isotropic plates the required number of sensors can be reduced from 6 to 4. (c) 2012 Elsevier B.V. All rights reserved.
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