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Article

Modeling and Research on Railway Balise Transmission System for Underwater Debris

1
College of Mechanical & Energy Engineering, Beijing University of Technology, Beijing 100124, China
2
School of Information Science and Technology, Beijing University of Technology, Beijing 100124, China
3
Beijing National Railway Research and Design Institute of Signal and Communication Group Co., Ltd., Beijing 100070, China
4
Standards & Metrology Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China
5
China Railway Test & Certification Center, Beijing 100081, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2024, 14(16), 7306; https://doi.org/10.3390/app14167306
Submission received: 20 July 2024 / Revised: 12 August 2024 / Accepted: 17 August 2024 / Published: 19 August 2024

Abstract

The balise transmission system (BTS) is essential for train position sensing and safe operation. Transmission loss is a key parameter particularly required for the evaluation of systems. The eddy current loss (ECL), caused by the conductivity of debris, affects the transmission performance of the BTS when the balise is immersed in water. This study proposes an effective modeling for the BTS using S-parameters. Utilizing the electromagnetic coupling analysis in the near-field region, we derived an equivalent circuit with the frequency and conductivity of water taken into consideration. The S21 can be predicted accurately by using the proposed equivalent circuit. For validation, a BTS system was implemented and measured to compare with theoretically calculated results and electromagnetic simulation results in the main lobe zone. The measurement results, simulation, and calculation were in good agreement. Moreover, the modeling was used to predict the I/O characteristics of the balise. The power of the balise uplink FSK signal was measured in the water debris and found to be approximately 0.62 dB less than in air. These findings aligned well with theoretical predictions.
Keywords: balise transmission system; electromagnetic coupling; S-parameters; water; equivalent circuit model balise transmission system; electromagnetic coupling; S-parameters; water; equivalent circuit model

Share and Cite

MDPI and ACS Style

Ye, K.; Jiao, J.; Xu, Q.; Chen, F.; Zhu, L. Modeling and Research on Railway Balise Transmission System for Underwater Debris. Appl. Sci. 2024, 14, 7306. https://doi.org/10.3390/app14167306

AMA Style

Ye K, Jiao J, Xu Q, Chen F, Zhu L. Modeling and Research on Railway Balise Transmission System for Underwater Debris. Applied Sciences. 2024; 14(16):7306. https://doi.org/10.3390/app14167306

Chicago/Turabian Style

Ye, Ke, Jingpin Jiao, Qing Xu, Fanghua Chen, and Linfu Zhu. 2024. "Modeling and Research on Railway Balise Transmission System for Underwater Debris" Applied Sciences 14, no. 16: 7306. https://doi.org/10.3390/app14167306

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