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Physic perspective fusion of electromagnetic acoustic transducer and pulsed eddy current testing in non-destructive testing system

Lookup NU author(s): Professor Gui Yun TianORCiD


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© 2020 The Author(s).Comprehensive non-destructive testing (NDT) for pipelines is a critical and challenging task. This paper proposes a novel physic perspective fusion NDT method of electromagnetic acoustic transducer (EMAT) and pulsed Eddy current testing (PECT) for detecting hybrid defects. This transceiver-integrated fusion sensor structure can simultaneously excite ultrasound and pulsed eddy current. Therefore, the generated ultrasound is applied to detect deep defects, while the eddy current detects surface defects. The theoretical derivation of EMAT and PECT fusion mechanism has been developed for analysis and interpretation of the results. In addition, numerical simulation on the detection of hybrid defects including surface defects with different width, depth and multiple bottom-thinning defects has been conducted. Experiments on both ferromagnetic and non-ferromagnetic material verify the feasibility of composite detection. Finally, tests have been validated on pipeline with weld defects, and the results show that the composite inspection method is capable of monitoring thickness variations and inspecting surface defects. This article is part of the theme issue 'Advanced electromagnetic non-destructive evaluation and smart monitoring'.

Publication metadata

Author(s): Guo W, Gao B, Tian GY, Si D

Publication type: Article

Publication status: Published

Journal: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

Year: 2020

Volume: 378

Issue: 2182

Print publication date: 16/10/2020

Online publication date: 14/09/2020

Acceptance date: 05/07/2020

ISSN (print): 1364-503X

ISSN (electronic): 1471-2962

Publisher: Royal Society Publishing


DOI: 10.1098/rsta.2019.0608

PubMed id: 32921232

Notes: Physic fusion of EMAT and PECT


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