Nonintrusive Inspection of Moisture Damp in Composited Insulation Structure Based on Terahertz Technology
Article
Article Title | Nonintrusive Inspection of Moisture Damp in Composited Insulation Structure Based on Terahertz Technology |
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ERA Journal ID | 979 |
Article Category | Article |
Authors | Li, Shuaibing (Author), Cao, Binglei (Author), Kang, Yongqiang (Author), Cui, Yi (Author) and Dong, Haiying (Author) |
Journal Title | IEEE Transactions on Instrumentation and Measurement |
Journal Citation | 70 |
Article Number | 6011110 |
Number of Pages | 10 |
Year | 2021 |
Publisher | IEEE (Institute of Electrical and Electronics Engineers) |
Place of Publication | United States |
ISSN | 0018-9456 |
1557-9662 | |
Digital Object Identifier (DOI) | https://doi.org/10.1109/TIM.2021.3117360 |
Web Address (URL) | https://ieeexplore.ieee.org/document/9562552 |
Abstract | Moisture damp has been identified as one of the most harmful agents of multilayer composited insulation, which can seriously accelerate its degradation, cause unexpected failure, and even lead to catastrophic accidents. This article proposes a nonintrusive method for moisture inspection of multilayer insulation structure based on terahertz (THz) technology with a focus on the cable terminal of the electric multiple units (EMUs). First, a three-layer scattering model is established based on the actual structure of the composite cable terminal, and theoretical analysis is performed to reveal the potential application mechanism. Based on that, an artificial model of a three-layer structure is then built on which the insulation damp test is carried out. Finally, the THz spectrum and THz imaging tests are performed. Results show that the frequency-domain signal can effectively identify the moisture inside the multilayer composited insulation. The imaging results in the frequency domain of the sample can accurately determine the geometric parameters of the damp area. By further analyzing the time-domain spectroscopy, the thickness of insulation affected by moisture can be identified quantitatively. This article verifies the feasibility of THz technology in inspecting the moisture dampness of multilayer composite insulation and its potential application in the damp condition assessment of EMU cable terminals. |
Keywords | Cable terminal; insulation damp; multilayer composite insulation; nonintrusive detection; terahertz (THz) |
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 | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7w08/nonintrusive-inspection-of-moisture-damp-in-composited-insulation-structure-based-on-terahertz-technology
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