Simulation-Based Study on the Effect of Scan Pitch for Ultrasonic Non-destructive Inspection in Cast Billet with Computerized Tomography

  • Yoko Norose
  • Koichi Mizutani
  • Naoto Wakatsuki
Part of the Proceedings in Information and Communications Technology book series (PICT, volume 4)


This paper deals with ultrasonic non-destructive inspection of cast billet using computerized tomographic method, which has been proposed by the authors. This method reconstructs pseudo sound velocity distributions, which reflect defect existence in cast billet as the decrease of the velocity. Although this method enabled to detect the defects whose size was 2.0 mm in our previous work, transducer scanning with small pitch, which resulted in long testing time, was taken. In this paper, we analyze the effect of scan pitch for ultrasonic non-destructive inspection in cast billet with computerized tomography, with aid of numerical simulation of wave propagation, to find the necessary and sufficient scan pitch to detect defects.


Longitudinal Wave Defect Size Projection Data Direct Wave Cast Billet 
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Copyright information

© Springer Tokyo 2012

Authors and Affiliations

  • Yoko Norose
    • 1
  • Koichi Mizutani
    • 1
  • Naoto Wakatsuki
    • 1
  1. 1.Graduate School of Systems and Information EngineeringUniversity of TsukubaTsukubaJapan

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