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http://dx.doi.org/10.5050/KSNVE.2013.23.2.152

Impact Localization of a Composite Plate Using a Single Transducer and Spatial Focusing Signal Processing Techniques  

Cho, Sungjong (Graduate School, Wonkwang University)
Jeong, Hyunjo (Division of Mechanical and Automotive Engineering, Wonkwang University)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.23, no.2, 2013 , pp. 152-159 More about this Journal
Abstract
A structural health monitoring(SHM) technique for locating impact position in a composite plate is presented in this paper. The technique employs a single sensor and spatial focusing properties of time reversal(TR) and inverse filtering(IF). We first examine the focusing effect of back-propagated signal at the impact position and its surroundings through simulation. Impact experiments are then carried out and the localization images are found using the TR and IF signal processing, respectively. Both techniques provide accurate impact location results. Compared to existing techniques for locating impact or acoustic emission source, the proposed methods have the benefits of using a single sensor and not requiring knowledge of material properties and geometry of structures. Furthermore, it does not depend on a particular mode of dispersive Lamb waves that is frequently used in the SHM of plate-like structures.
Keywords
Time-reversal; Lamb Wave; Impact Localization; Localization Imaging; Inverse Filtering;
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Times Cited By KSCI : 1  (Citation Analysis)
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