measurement system detecting the defects in concrete structure using a new imaging method

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420462
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Civil engineering materials/Construction/Construction management
• Research Institution: Tohoku Gakuin University
• Principal Investigator: Lee Sanghun 東北学院大学, 工学部, 教授 (20377807)
• Co-Investigator(Kenkyū-buntansha): KAMADA TOSHIRO 大阪大学, 大学院工学研究科, 教授 (10224651) ; UCHIDA SHINYA 立命館大学, 理工学部, 講師 (70543461)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 衝撃弾性波法 / 欠陥の可視化 / 低周波数領域 / 3次元探査システム

Outline of Final Research Achievements

By expanding the domain of the visualization to a low frequency, the irregular defect cases, include the cases that the size of defects are small and the position of defects are shallow from the surface and the form of defects are round, were able to image.
As a construction of the measurement system which automate the repeating series of processes and display the position of the defect for three dimensions, not only the sectional defect images but the horizontal defect images are able to get for the test piece cut from a floor slab of a used bridge.
About the improvement of visualization performance gain by appropriate use of impacter, the relationship of impacter with measurement dimensions have been investigated by the preliminary experiments and it was confirmed that the high precision was provided with an appropriate impacter in the measurement.

Free Research Field

非破壊検査工学