DocumentCode :
3603543
Title :
Automatic Scanning System for Back-Side Defect of Steel Structure Using Magnetic Flux Leakage Method
Author :
Sakai, Kenji ; Morita, Koji ; Haga, Yuta ; Kiwa, Toshihiko ; Inoue, Katsumi ; Tsukada, Keiji
Author_Institution :
Okayama Univ., Okayama, Japan
Volume :
51
Issue :
11
fYear :
2015
Firstpage :
1
Lastpage :
3
Abstract :
An automatic nondestructive evaluation system using the magnetic-flux-leakage method was developed for detecting the back-side defects of large structures in order to realize fast detection in a wide measurement area. A magnetic field was applied to an object using a ferrite yoke with an induction coil, and the leaked magnetic flux from the object was detected by a magnetoresistive sensor. This measurement probe was fixed on an automatic scanning system. The developed automatic scanning system detected magnetic signal changes corresponding to the back-side defects of the steel plates. To demonstrate the effectiveness of the developed system, we measured the steel plate of a cargo crane, which was corroded on the back side. We found that the detected magnetic signal changed markedly in the area with corrosion, whereas only a slight magnetic signal change was detected in the area without corrosion. Therefore, the developed system is useful for detecting the back-side defects in a wide area, and can be used for screening tests.
Keywords :
corrosion; cranes; magnetic leakage; nondestructive testing; plates (structures); steel; automatic nondestructive evaluation system; automatic scanning system; back-side defect; cargo crane; corrosion; detected magnetic signal; ferrite yoke; induction coil; magnetic flux leakage method; magnetic signal changes; magnetoresistive sensor; screening tests; steel plates; steel structure; Area measurement; Corrosion; Cranes; Magnetic field measurement; Magnetic fields; Magnetic flux leakage; Steel; Automatic testing; Magnetic flux leakage; Magnetic sensors; Non-destructive testing; magnetic flux leakage (MFL); magnetic sensors; nondestructive testing;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2015.2453211
Filename :
7151805
Link To Document :
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