Terahertz-Based Insulation Delamination Defect Inspection of Vehicle Cable Terminals
Article
Article Title | Terahertz-Based Insulation Delamination Defect Inspection of Vehicle Cable Terminals |
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ERA Journal ID | 210577 |
Article Category | Article |
Authors | Li, Shuaibing (Author), Cao, Binglei (Author), Cui, Yi (Author), Kang, Yongqiang (Author), Gao, Sheng (Author), Li, Hongwei (Author) and Dong, Haiying (Author) |
Journal Title | IEEE Transactions on Transportation Electrification |
Journal Citation | 9 (1), pp. 1765 - 1774 |
Number of Pages | 9 |
Year | 2023 |
Publisher | IEEE (Institute of Electrical and Electronics Engineers) |
Place of Publication | United States |
ISSN | 2332-7782 |
Digital Object Identifier (DOI) | https://doi.org/10.1109/TTE.2022.3200043 |
Web Address (URL) | https://ieeexplore.ieee.org/document/9863005 |
Abstract | Cable terminals of the high-speed Electric Multiple Units (EMUs) are prone to undertake insulation delamination defects due to their special operating conditions. Such a defect is difficult to identify and it may pose a great threat to the safety of the EMUs. To achieve accurate detection of insulation delamination defects, this paper proposes a terahertz-based approach that combines the spectrum of the terahertz wave and terahertz imaging techniques. Specifically, a synthetic multilayer composite insulation structure with an air gap is firstly built to simulate the internal delamination defect of the cable terminal. Then terahertz tests in both time and frequency domains are performed on the synthetic structure. Experimental results show that the delamination defect of the multilayer insulation structure can be quickly detected by observing the absorption spectrum in the terahertz frequency domain. The location and geometry of the defect can be preliminarily determined by the terahertz imaging and then further refined through image segmentation. In addition, the thickness of the delamination defect can be quickly calculated by the terahertz time-domain spectrum. By combining the terahertz spectrum and the terahertz imaging information, the delamination defects are quantitively detected for the multilayer composite structure or even for the EMU’s cable terminals. |
Keywords | Acoustics; Air gaps; composite structure; Delamination; Delamination defect; Insulation; Power cables; terahertz; terahertz imaging; Terahertz wave imaging; Testing; vehicle cable terminal |
ANZSRC Field of Research 2020 | 400803. Electrical energy generation (incl. renewables, excl. photovoltaics) |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Lanzhou Jiaotong University, China |
University of Queensland | |
China Communications Construction, China | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7w00/terahertz-based-insulation-delamination-defect-inspection-of-vehicle-cable-terminals
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