Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)

The Korean Society for Nondestructive Testing (한국비파괴검사학회)
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Impact Localization for a Composite Plate Using the Spatial Focusing Properties of Advanced Signal Processing Techniques

  • Jeong, Hyunjo (Division of Mechanical and Automobile Engineering, and Research Institute of Engineering Technology Development, Wonkwang University) ;
  • Cho, Sungjong (Division of Mechanical and Automobile Engineering, and Research Institute of Engineering Technology Development, Wonkwang University)
  • Received : 2012.11.10
  • Accepted : 2012.12.05
  • Published : 2012.12.30
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Abstract

A structural health monitoring technique for locating impact position in a composite plate is presented in this paper. The method employs a single sensor and spatial focusing properties of time reversal(TR) and inverse filtering(IF). We first examine the spatial focusing efficiency of both approaches at the impact position and its surroundings through impact experiments. The imaging results of impact localization show that the impact location can be accurately estimated in any position of the plate. Compared to existing techniques for locating impact or acoustic emission source, the proposed method has the benefits of using a single sensor and not requiring knowledge of anisotropic material properties and geometry of structures. Furthermore, it does not depend on a particular mode of dispersive Lamb waves that is frequently used in other ultrasonic testing of plate-like structures.

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References

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