Acoustic emission source localization in anisotropic structures with diffuse field conditions using a time reversal approach

Francesco Ciampa; Michele Meo

doi:10.1117/12.882622

31 March 2011 Acoustic emission source localization in anisotropic structures with diffuse field conditions using a time reversal approach

Francesco Ciampa, Michele Meo

Author Affiliations +

Proceedings Volume 7984, Health Monitoring of Structural and Biological Systems 2011; 798416 (2011) https://doi.org/10.1117/12.882622
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

Abstract

This research work presents an in-situ imaging method for the localization of the impact point in complex anisotropic structures with diffuse field conditions, using only one passive transducer. The proposed technique is based on the time reversal approach applied to a number of waveforms stored into a database containing the experimental Green's function of the medium. The present method exploits the benefits of multiple scattering, mode conversion and boundaries reflections to achieve the focusing of the source with high resolution. The optimal re-focusing of the back propagated wave field at the impact point is accomplished through a "virtual" imaging process, which does not require any iterative algorithms and a priori knowledge of the mechanical properties of the structure. The robustness of the time reversal method is experimentally demonstrated on a stiffened composite panel and the source position can be retrieved with a high level of accuracy (error less than 3%). The simple configuration, minimal processing requirements and computational time (less than 1 sec) make this method a valid alternative to the conventional imaging structural health monitoring systems for the acoustic emission source localization.

Citation Download Citation

Francesco Ciampa and Michele Meo "Acoustic emission source localization in anisotropic structures with diffuse field conditions using a time reversal approach", Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 798416 (31 March 2011); https://doi.org/10.1117/12.882622

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available