Journal of The Japanese Society for Non-Destructive Inspection
Print ISSN : 0367-5866
Volume 68, Issue 2
Displaying 1-1 of 1 articles from this issue
  • Tatsuhiko KAWAKAMI, Takaaki KONISHI, Noriyuki SADAOKA, Toshiichi TAKAH ...
    2019 Volume 68 Issue 2 Pages 84-88
    Published: February 01, 2019
    Released on J-STAGE: January 31, 2019
    JOURNAL FREE ACCESS

    This paper proposes a method for evaluating surface defects on cast parts. A laser profilometer measures the shape of parts as point cloud data and principal component analysis estimates the surface variation. The idea to detect defects is that they usually have a high surface variation value. Experiments were conducted, applying our method to simulated defects and cast parts. The simulated defects at the estimated surface variation at the defect is characteristically larger than the flat surface. For the cast parts, a defect on its cast surface was evaluated with SN ratio of 5.9. This method is robust to the noise caused by the surface roughness or shape non-uniformity of cast parts.

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