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Title |
Imaging Magnetic Flux Leakage based Steel Plate Damage for Steel Structure Diagnosis
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Authors |
김한선(Hansun Kim) ; 김주원(Ju-Won Kim) ; 유병준(Byoungjoon Yu) ; 김원규(Wonkyu Kim4) ; 박승희(Seunghee Park) |
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DOI |
https://doi.org/10.11112/jksmi.2019.23.7.129 |
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Keywords |
누설자속; 강판; 비파괴검사; 손상 진단; P-P value; Visualization Magnetic flux leakage; Steel plate; Non-destructive evaluation; Damage diagnosis; P-P value; Visualization |
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Abstract |
In this study, the magnetic flux leakage technique was applied to diagnose steel plate damage, imaging technique was applied through those signals. Steel plate specimens with different thicknesses were prepared for the imaging the magnetic flux leakage signal, and 6 different depths of damage were artificially processed at the same locations on each specimen. The sensor head consist hall sensor and magnetization yoke was fabricated to magnetize the steel plate specimen and measure the magnetic flux leakage signal. In order to remove the noise and increase the resolution of the image in the signal collected from the hall sensor, various of signal processing was performed. P-P value was analyzed for each channel to analyze the magnetic flux leakage signals measured from each damaged part. Based on the above processed signals and analysis, it was converted into heatmap image. Through this, it was possible to identify the damage on the steel plate at glance by imaging magnetic flux leakage signal.
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