Electromagnetic pulsed thermography for natural cracks inspection.
Emerging integrated sensing and monitoring of material degradation and cracks are increasingly required for characterizing the structural integrity and safety of infrastructure. However, most conventional nondestructive evaluation (NDE) methods are based on single modality sensing which is not adequate to evaluate structural integrity and natural cracks. This paper proposed electromagnetic pulsed thermography for fast and comprehensive defect characterization. It hybrids multiple physical phenomena i.e. magnetic flux leakage, induced eddy current and induction heating linking to physics as well as signal processing algorithms to provide abundant information of material properties and defects. New features are proposed using 1st derivation that reflects multiphysics spatial and temporal behaviors to enhance the detection of cracks with different orientations. Promising results that robust to lift-off changes and invariant features for artificial and natural cracks detection have been demonstrated that the proposed method significantly improves defect detectability. It opens up multiphysics sensing and integrated NDE with potential impact for natural understanding and better quantitative evaluation of natural cracks including stress corrosion crack (SCC) and rolling contact fatigue (RCF).
School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK.|College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
Yunlai
Y
Gao
School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK.|School of Automation Engineering, University of Electronics Science and Technology of China, Chengdu 611731, China.
Gui Yun
GY
Tian
College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
Ping
P
Wang
College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
Haitao
H
Wang
School of Automation Engineering, University of Electronics Science and Technology of China, Chengdu 611731, China.
Bin
B
Gao
School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK.
Wai Lok
WL
Woo
School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK.
Kongjing
K
Li
D000465:Algorithms; D003252:Construction Materials / Q000032:analysis*; D003343:Corrosion; D055590:Electromagnetic Phenomena; D006361:Heating; D006801:Humans; D008422:Materials Testing / Q000295:instrumentation / Q000379:methods*; D013817:Thermography / Q000295:instrumentation / Q000379:methods*