Journal of Japan Society for Safety Engineering
Online ISSN : 2424-0656
Print ISSN : 0570-4480
ISSN-L : 0570-4480
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Volume 43, Issue 5
JOURNAL OF JAPAN SOCIETY FOR SAFETY ENGINEERING_2004_5
Displaying 1-14 of 14 articles from this issue
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PROPOSAL FOR SAFETY
REVIEW
ORIGINAL PAPER
  • Improvement of Detectability of Corrosive Flaws by Means of Signal Processing in the far ─ side Magnetic Flux Leakage Technique
    Xu Yang，Naoya Kasai and Kazuyoshi Sekine, Hiroaki Maruyama
    2004 Volume 43 Issue 5 Pages 298-305
    Published: October 15, 2004
    Released on J-STAGE: December 30, 2016
    DOIhttps://doi.org/10.18943/safety.43.5_298
    JOURNAL FREE ACCESS
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    Based on the proposal of quantitative evaluation method on the local corrosion by effective far─side MFLT (Magnetic Flux Leakage Technique) for the inspection on the bottom plate of oil tank, the internal magnetic field and the flaw leakage magnetic field around the steel plate were analyzed by using the finite element method. As a result, the inspection system has been designed. Moreover, Discrete Wavelet Analysis method, which could be used in accurately extracting the signals arisen only from flaws due to its irrelevance with the positions of original signals, was proposed in this research to improve the detectability of corrosive flaws. It was confirmed that the evaluate the back side corrosive flaws by the proposed signal processing was successfully applied to experiment on a large steel plate such as the bottom plate of oil tank.

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TOPICS
TECHNICAL REPORT
ACCIDENT ANALYSIS
RESEACH INSTITUTE
SALOON
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