Finite Difference Time Domain Modeling and Inversion of Internal Delamination Defects in Vehicle Cable Terminal in Terahertz Band
Article
Article Title | Finite Difference Time Domain Modeling and Inversion of Internal Delamination Defects in Vehicle Cable Terminal in Terahertz Band |
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ERA Journal ID | 979 |
Article Category | Article |
Authors | Li, Shuaibing, Dan, Jiahao, Yang, Dong, Cui, Yi, Li, Tiangeng, Kang, Yongqiang and Dong, Haiying |
Journal Title | IEEE Transactions on Instrumentation and Measurement |
Number of Pages | 10 |
Year | 2024 |
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.2024.3406831 |
Web Address (URL) | https://ieeexplore.ieee.org/document/10540416/authors |
Abstract | To address the gap in simulating internal defects within composite insulation structures in the terahertz domain for vehicle cable terminals, this paper proposes a finite difference time domain (FDTD) modeling and inversion method based on terahertz time-domain measurement results. Firstly, based on the actual structure of the vehicle cable terminal and simplified equivalents, a three-layer composite insulation structure was constructed, and a pre-fabricated 1.35mm delamination defect sample between the stress tube and the ethylene-propylene rubber layer was prepared. Then, the time-domain characteristics of the sample were tested and analyzed using a terahertz time-domain spectroscopy (THz-TDS) system. Based on this, the optical parameters of insulating materials within the terahertz frequency range of the model are extracted using a transmission THz-TDS system, and the Debye model is employed to fit and optimize the measured parameters. Finally, FDTD simulations and inversions for internal delamination defects in vehicle cable terminals were conducted within the terahertz frequency range. The results demonstrate a high agreement between the proposed FDTD-based defect modeling and inversion method and actual experimental results. Under unknown optical parameters of the test sample, combining THz-TDS experimental results with FDTD numerical modeling enables the inversion and quantitative characterization of internal delamination defects in vehicle cable terminals. |
Keywords | Composite vehicle cable terminal; delamination; optical parameters; finite difference time domain modeling; terahertz time-domain spectroscopy |
Contains Sensitive Content | Does not contain sensitive content |
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 |
School of Engineering |
https://research.usq.edu.au/item/z7639/finite-difference-time-domain-modeling-and-inversion-of-internal-delamination-defects-in-vehicle-cable-terminal-in-terahertz-band
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