期刊
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
卷 14, 期 5, 页码 475-488出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1475921715596220
关键词
Pulsed laser; noncontact non-destructive testing; ultrasonic waves; pipeline structure; damage visualization
资金
- National Research Foundation (NRF) of Korea - Korea government (MSIP) [NRF-2014R1A2A1A11054299]
- Korea Agency for Infrastructure Technology Advancement under the Ministry of Land, Infrastructure and Transport of the Korean government [13CCTI-T01]
- Construction Technology Research Program - Ministry of Land, Infrastructure and Transport of Korea government [14SCIP-B088624-01]
- Korea Agency for Infrastructure Technology Advancement (KAIA) [66330] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2014R1A2A1A11054299] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, a noncontact non-destructive testing method is implemented to visualize damages of a pipeline structure. An ND:YAG pulsed laser system was used to generate guided waves and a galvanometer-based laser scanner scans a specific area to find damage location. The wave responses were measured using a piezoelectric sensor attached to the pipeline. The measured time and spatial responses were transformed to data in frequency and wavenumber domains through three-dimensional Fourier transform. Damage-sensitive features could be obtained using wavenumber filter to extract standing wave energy. A flaw imaging technique of the pipeline structure was conducted by calculating root mean square. Notches and thickness reduction at a pipeline structure were investigated to verify the effectiveness and the robustness of the proposed non-destructive testing approach. Additionally, a series of experiments were repeated under heating condition to consider the real-world pipeline structures.
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