Modeling and Research on Railway Balise Transmission System for Underwater Debris
Source abstract
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.
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Research context
OpenAlex topics: Underwater Vehicles and Communication Systems · Electromagnetic Launch and Propulsion Technology · Wireless Power Transfer Systems
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Mechanical & Energy Engineering, Beijing University of Technology, Beijing 100124, China
School of Information Science and Technology, Beijing University of Technology, Beijing 100124, China
Beijing National Railway Research and Design Institute of Signal and Communication Group Co., Ltd., Beijing 100070, China
Standards & Metrology Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China
China Railway Test & Certification Center, Beijing 100081, China
Funding
China Academy of Railway Sciences Corporation Limited · China State Railway Group Co., Ltd.
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