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Authors:
Koji Morita
Keishu Shiga
Yuta Haga
Kenji Sakai
Toshihiko Kiwa
Keiji Tsukada
Keywords: magnetic flux leakage; magnetic imaging; AMR device; low-frequency field; backside defect
Abstract:
Demand for detecting deep defects in the steel plate is increasing. We have reported a magnetic flux leakage testing (MFLT) system to detect deep defects and create magnetic imaging methods that indicate the backside defect. However, the developed system with one magnetic sensor requires XY automatic positioning stage and long measurement time. In this study, to realize fast measurement for practical use, we have developed a new system which can detect the magnetic field at several measurement points simultaneously using a multi-sensor array. Using the developed system, backside corrosion of steel plates having different depth was measured and two-dimensional images were created. The detected vector signal was analyzed by adjusting phase data. As a result, the developed MFLT system showed good performance of detection limit more than 7.2 mm in depth.
Pages: 174 to 178
Copyright: Copyright (c) IARIA, 2015
Publication date: August 23, 2015
Published in: conference
ISSN: 2308-3514
ISBN: 978-1-61208-426-8
Location: Venice, Italy
Dates: from August 23, 2015 to August 28, 2015