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http://dx.doi.org/10.7735/ksmte.2014.23.1.027

Development of Tomograph Technique for Evaluating Thickness Reduction using Noncontact Ultrasonic Sensor Network  

Lee, J.M. (Graduate School of Energy & Environment, Seoul National Univ. of Science & Technology)
Kim, Y.K. (Technology R&D Institute, KEPCO Plant Service & Engineering)
Park, I.K. (Dept. of Mechanical & Automotive Engineering, Seoul National Univ. of Science & Technology)
Publication Information
Journal of the Korean Society of Manufacturing Technology Engineers / v.23, no.1, 2014 , pp. 27-31 More about this Journal
Abstract
This paper describes a tomographic imaging technique for evaluating the thickness reduction of a plate-like structure using a noncontact sensor network based on an electromagnetic acoustic transducer that generates shear horizontal plate waves. Because this technique is based on the effect of mode cutoff and time of flight of guided waves caused by a change in thickness, the tomographic image provides information on the presence of defects in the structure. To verify the performance of the method, artificial defects with various thickness reduction ratios were machined in an aluminum plate, and the tomographic imaging results are reported. The results show that the generated tomographic image displays the thickness reductions and can identify their locations. Therefore, the proposed technique has good potential as a tool for health monitoring of the integrity of plate-like structures.
Keywords
Electromagnetic acoustic transducer; Shear horizontal plate waves; Tomograph; Thickness reduction; Noncontact; Time of flight;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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