NDLI: Automatic Scanning System for Back-Side Defect of Steel Structure Using Magnetic Flux Leakage Method

Content Provider	IEEE Xplore Digital Library
Author	Sakai, K. Morita, K. Haga, Y. Kiwa, T. Inoue, K. Tsukada, K.
Copyright Year	1965
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.
Sponsorship	IEEE Magnetics Society
Starting Page	1
Ending Page	3
Page Count	3
File Size	936293
File Format	PDF
ISSN	00189464
Volume Number	51
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Steel Corrosion Magnetic fields Magnetic flux leakage Magnetic field measurement Cranes Area measurement Magnetic sensors Non-destructive testing Automatic testing nondestructive testing magnetic flux leakage (MFL) magnetic sensors
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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