Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Guided-Waves-Based Mortar-Filled Steel Pipe Inspection Using EMAT End Wavelet Transform

  • Na Won-Bae (Department of Ocean Engineering, Pukyong National University) ;
  • Kim Jeong-Tae (Department of Ocean Engineering, Pukyong National University) ;
  • Ryu Yeon-Sun (Department of Ocean Engineering, Pukyong National University)
  • Published : 2006.04.01
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Abstract

Guided-waves-based mortar-filled steel pipe inspection is carried out through using EMAT (Electro magnetic acoustic transducer) and wavelet transform. Possibly existing anomalies such as separation (or void) and inclusion are made in the fabricated mortar-fled steel pipes: these anomalies are infected. Since guided waves have the long range inspection capability, EMAT has its own advantages over the conventional PZT (Piezoelectric zirconate titanate), and wavelet transform gives the multi-resolution on time-frequency domain results, the suggested technique gives an alternative way for inspecting mortar-filled steel pipes, which are popularly used for supporting marine structures such as piers, wharfs, moles, and dolphins. Through this study, it is show that the suggested technique is promising for detecting the amounts of separations and inclusions.

Keywords

References

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