• Study on Filter Performance Optimization of Balise Transmission Unit
• Cao Hefei, Meng Tianxu, Yang Jingbo, Xiang Lei
• 2024 Vol. 21 (4): 1-9. DOI:10.3969/j.issn.1673-4440.2024.04.001
• Abstract ( ) PDF (4318KB)( )
• In this paper, the research status of Electromagnetic Interference (EMI) of balise system in electromagnetic rail environment is summarized, and a scheme of optimizing the filter performance of balise transmission unit is put forward according to the common methods of EMI protection. Firstly, the filter performance of the existing balise transmission unit is analyzed, and a new filter circuit is designed by the traditional method. Then, the NSGA-II algorithm is adopted to optimize the calculation scheme for the problem that the performance index of filter circuit obtained by traditional calculation method has deviation, and the equivalent filter circuit is realized after considering the transmission line and the actual components. After that, the parameters are optimized by software to reduce the influence of distributed parameters and the filter is produced. Finally, the insertion loss index of the filter is tested by spectrum analyzer, and the feasibility of the scheme is verified by comparing with the theoretical value in design.
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• Speed and Distance Measurement System of Train Control Onboard Equipment Based on Head and Tail Redundancy
• Ning Yunzhuan, Bao Pengyu, Liu Jia, Wang Cheng, Gu Lingfeng
• 2024 Vol. 21 (4): 10-14. DOI:10.3969/j.issn.1673-4440.2024.04.002
• Abstract ( ) PDF (995KB)( )
• The main task of the speed and distance measurement system is to provide real-time speed and displacement information to the train control system. Common speed and distance measurement systems mainly use the integration of multiple sensors (such as speed sensors, radar sensors, accelerometers, satellites, etc.). This paper proposes a design scheme for a redundant speed and distance measurement system based on the integration of multiple sensors from a system perspective. It can effectively reduce the faults of the speed and distance measurement system caused by single point faults, and avoid signaling system faults caused by faults of the speed and distance measurement system, so as to realize the safety redundancy of speed and distance measurement systems in head and tail of the train.
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• Research on Railway Signaling Drawing Check System Based on UML
• Huang Chenghui, Zhou Rong, Su Shiming, Su Chen, Wu Along
• 2024 Vol. 21 (4): 15-20. DOI:10.3969/j.issn.1673-4440.2024.04.003
• Abstract ( ) PDF (1280KB)( )
• To address the shortcomings of railway signaling system, such as high equipment complexity and difficult management and maintenance , UML technology is used to digitize diversified drawings by relying on the existing paper-based CAD drawings, and a railway signaling drawing check system is built through the station database to realize the backward verification of signaling drawings. Firstly, the content and principle of railway signaling drawing data information are introduced. Secondly, the railway signaling drawing database is introduced. Finally, the drawing check system is introduced in detail from the aspects of system structure, test scope, and functional verification. The drawing check system can provide construction drawing review and check during project implementation, and improve  the efficiency of the site operation.
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• Discussion on Three-dimensional Intelligent Operation and Maintenance Scheme of Railway Signaling System Based on Engineering Design
• Wu Changhai, Xiao Jinxiu
• 2024 Vol. 21 (4): 21-27. DOI:10.3969/j.issn.1673-4440.2024.04.004
• Abstract ( ) PDF (4745KB)( )
• This paper mainly introduces the status and problems of intelligent operation and maintenance of signaling system, and proposes that it is of practical significance and demand to carry out the research and development of intelligent operation and maintenance platform based on engineering design and three-dimensional means. From analysis of the actual demand of signaling system operation and maintenance, the demand for three aspects of centralized configuration of signaling system operation and maintenance terminals, unified and interoperable architecture, and platform visualization is summarized and extracted.; and the technical solution of railway signaling three-dimensional intelligent operation and maintenance integration platform based on engineering design is put forward, including system architecture, main functions, system interface principles, main equipment configuration principles, etc. At this stage, the platform is mainly composed of several major functions, such as results view, information query, asset management, provisional repair alarm, operation and maintenance expansion, emergency assistance and terminal management. Finally, examples are given to illustrate the application of system integration, and it is expected that the system will be integrated with the intelligent operation and maintenance subsystems of indoor, outdoor and management to realize the goal of operation and maintenance intelligence and digitalization of railway signaling.
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• Research on Obstacle Detection for Heavy-haul Train
• Zhang Dongtao
• 2024 Vol. 21 (4): 28-33,39. DOI:10.3969/j.issn.1673-4440.2024.04.005
• Abstract ( ) PDF (1551KB)( )
• This paper analyzes the current situation and shortcomings of using traditional manual observation method to detect obstacles for heavy-haul train, proposes an obstacle detecting method based on the fusion of LiDAR and binocular vision, which endows trains with autonomous obstacle detecting capability and provides new ideas for obstacle detecting for heavy-haul trains.
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• Discussion on Regression Test Strategy of Localization Function of ITCS Onboard System on Y-shaped Track
• Li Xue, Cao Xin
• 2024 Vol. 21 (4): 34-39. DOI:10.3969/j.issn.1673-4440.2024.04.006
• Abstract ( ) PDF (1017KB)( )
• With the retrofitting of Golmud South Station, the train control onboard system of the Qinghai Tibet Railway needs to achieve precise train positioning in Y-shaped track. This paper elaborates on the simulation testing platform for the localized Incremental Train Control System (ITCS) onboard system, aiming at upgrading and changing the onboard positioning function. In view of the correlation between the onboard system/software architecture implementation, a complete and effective impact analysis and regression testing plan is proposed, which plays a positive role in promoting the improvement of product quality.
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• Implementation of Balise Telegram Decoding Simulation Based on LabVIEW#br#
• Ye Ke, Hou Yan, Wang Tong
• 2024 Vol. 21 (4): 40-44,51. DOI:10.3969/j.issn.1673-4440.2024.04.007
• Abstract ( ) PDF (1133KB)( )
• In this paper, the FFFIS decoding strategy is described on the LabVIEW platform, and a piece of implementation method about telegram decoding algorithm of balise is introduced. According to the structure of balise telegram information and FFFIS decoding strategy, the decoding flowchart of the telegram is designed, and the decoding program is written around the three key difficulties of parity check, finding the start position of the telegram and the descrambling algorithm to realize the decoding simulation of the specific telegram.
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• Research on Quality Assessment Method for GSM-R Network Operation and Maintenance of CTCS-3 Line#br#
• Jiang Xiaobing, Xue Qiang, Xue Wanting
• 2024 Vol. 21 (4): 45-51. DOI:10.3969/j.issn.1673-4440.2024.04.008
• Abstract ( ) PDF (897KB)( )
• This paper analyzes the quality assessment ideas for the GSM-R network operation and maintenance of CTCS-3 line on the characteristics of high-speed railway GSM-R network carrying train communication services, proposes a quality assessment method for GSM-R network operation and maintenance of CTCS-3 line. The GSM-R network operation data are calculated to obtain the assessment results, which comprehensively reflects the GSM-R network operation and maintenance quality status of CTCS-3 line.
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• Discussion on Disaster Recovery Solutions of Railway Communication Cloud#br#
• Deng Yefei
• 2024 Vol. 21 (4): 52-56,69. DOI:10.3969/j.issn.1673-4440.2024.04.009
• Abstract ( ) PDF (1072KB)( )
• This paper describes concepts, indexes and models of disaster recovery. Combined with the overall framework of railway communication cloud, the application requirements of disaster recovery in railway communication cloud are analyzed, and the characteristics of disaster recovery solution for railway communication cloud are proposed. Distributed and diversified disaster recovery methods should be adopted in close combination with the communication cloud architecture and service types. This paper proposes disaster recovery construction ideas applicable to railway communication cloud from the aspects of central cloud, edge cloud and network, in order to meet the increasing needs of railway communication cloud for continuity, stability and reliability, and has guiding significance for the construction of railway communication cloud.
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• Cyber Security Risk Assessment Approach for Rolling Stock Onboard Communication Systems
• Yan Shiqi
• 2024 Vol. 21 (4): 57-62,95. DOI:10.3969/j.issn.1673-4440.2024.04.010
• Abstract ( ) PDF (924KB)( )
• This paper proposes a cyber security risk assessment methodology for rolling stock onboard communication systems based on the Common Vulnerability Scoring System (CVSS), introduces the workflow of the method in detail, and carries out defect probability and impact assessment, and also derives the cyber security level corresponding to the risk range of each system defect. Finally, it is applied to cyber security risk assessment activities of an overseas metro onboard communication system project, laying a foundation for the subsequent system optimization activities and cyber security risk repositioning after taking optimization measures.
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• Research and Application of Perimeter Intrusion Alarm System for High-speed Railway
• Zhai Hailing
• 2024 Vol. 21 (4): 63-69. DOI:10.3969/j.issn.1673-4440.2024.04.011
• Abstract ( ) PDF (1519KB)( )
• Considering the complexity and particularity of high-speed railway line and geographical environment, this paper proposes a technical scheme of perimeter intrusion alarm system using different ways for different sections along the railway. Based on FBG sensing technology, radar and intelligent video combination technology, etc., while ensuring the technological advancement, combined with the needs of future development, the system fully meets the actual needs of intelligent protection along the line, communication base station and station perimeter, and can effectively deter, block and alarm the intruders to ensure the safe operation of high-speed railway.
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• Flexible Real-name Scheme Design for Overseas Railway Ticket System
• Feng Tao, Yu Xingjian, Zhao Yao
• 2024 Vol. 21 (4): 70-74,80. DOI:10.3969/j.issn.1673-4440.2024.04.012
• Abstract ( ) PDF (1066KB)( )
• The real-name system verification is an important part of the railway ticket system, and its design profoundly affects the railway travel experience of passengers. The real-name system of train tickets based on China's existing standards is difficult to transplant and implement in the design of overseas railway ticket systems, which is a problem that needs to be solved in overseas railway construction. This paper proposes a membership scheme to replace the China’s standard real-name ticket system in the design of the overseas railway ticket system, which is helpful to improve the service efficiency and operational safety of overseas railways.
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• Design and Implementation of Management and Control Module of Fixed Station Control Equipment in DRTD System#br#
• Zhang Enshuo, Zhou Tianshu, Gao Gao, Shi Jin, Zhang Chi
• 2024 Vol. 21 (4): 75-80. DOI:10.3969/j.issn.1673-4440.2024.04.013
• Abstract ( ) PDF (1116KB)( )
• With the development of railway wireless train dispatching communication technology and the application requirements of train communication equipment, China is promoting digital intercom technology in an all-round way. Because the 450MHz analog wireless communication in the railway wireless train dispatching system cannot carry out voice and data communication at the same time, and cannot carry out individual call, group call and has poor anti-interference ability, it will be upgraded to digital standard wireless communication such as DRTD, GSM-R or 5G-R. This paper mainly introduces the design of the control module of the fixed station control equipment in the Digital Radio Communication System for Train Dispatching (DRTD). It realizes data interaction with the dispatching console, the fixed station and the digital train dispatching interface server, manages  fixed stations and their terminals in some stations, and sends dispatching commands, the wireless check information of the train number or the route notices from digital train dispatching interface server to the corresponding fixed stations to ensure the reliability of the railway train dispatching system communication.
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• Research on Optimization Strategy of Security Check Configuration in Urban Rail Transit
• Cao Kai, Zhang Ning
• 2024 Vol. 21 (4): 81-88. DOI:10.3969/j.issn.1673-4440.2024.04.014
• Abstract ( ) PDF (2707KB)( )
• This paper proposes a differentiated security check mode by calculating the station's entry capacity, and provides optimization solutions for temporary security checks and ticket gate configurations, forms a security check configuration optimization strategy. The results indicate that the existing security screening mode in stations is difficult to meet the demand of passengers entering the station during peak hours. The optimization strategy based on differentiated security check mode can significantly improve the security check capacity, and the security line length has been significantly shortened.
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• Discussion and Optimization of CC-TCMS Communication Interruption Scenarios of FAO Project
• Xia Zhendong, Hu Huan
• 2024 Vol. 21 (4): 89-95. DOI:10.3969/j.issn.1673-4440.2024.04.015
• Abstract ( ) PDF (1252KB)( )
• Compared with the traditional manned projects, the FAO projects have more complex scenarios, and the system developed according to the scenarios can replace the manual and effectively coordinate the linkage of various systems. The FAO projects also have corresponding ways to deal with faults under complex working conditions, so as to improve the degree of automation, and at the same time passengers can get a better travel experience. In view of the fault scenarios of communication interruption between Carborne Controller (CC) and Train Control Management System (TCMS) that may occur in FAO projects, this paper introduces the treatment methods of the existing projects. According to different train locations, the author gives reasonable optimization suggestions respectively, which provides a way of thinking for the system treatment of the fault scenarios in subsequent projects.
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• Analysis and Design of Integrated Tool Platform for Urban Rail Signaling System#br#
• Luo Zhengxin, Geng Peng, Qiu Xihong
• 2024 Vol. 21 (4): 96-102,108. DOI:10.3969/j.issn.1673-4440.2024.04.016
• Abstract ( ) PDF (1191KB)( )
• The integrated tool platform is based on the Spring Cloud framework and adopts the design concept of microservice for overall architecture design to build an integrated platform of supporting production tool service and project lifecycle data management of urban rail signaling system. The design drawings are used as a unified data source, and the integrated data table is used as the common input of all supporting tools, the overall efficiency is improved and data decoupling is realized. In order to realize the platform-based management, the reconstruction method of the existing tool microservice is given. The integrated tool platform opens up the data and tool service chain of the whole business process from signaling system design, data configuration, product compilation to software release, etc.
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• Research on Interface Mode of Platform Door Gap Detection System and Signaling System#br#
• Li Yong
• 2024 Vol. 21 (4): 103-108. DOI:10.3969/j.issn.1673-4440.2024.04.017
• Abstract ( ) PDF (1071KB)( )
• There exists a gap between train door and platform door when rail transit train is running in platform area or stopping in the station, several cases that passengers got trapped in the gap which caused casualties and operation interruption had happened in operation, this kind of cases could seriously affect operation efficiency and bring negative social impact. Gap detection becomes to be especially important. Gap detection system can effectively detect the obstacles in the gap , and send the detection results to signaling system through system interface, which would be used in controlling train operation. This paper discusses the system interfaces of signaling system, platform door system and gap detection system, and analyzes the advantages and disadvantages of each method, and finally selects the interface mode that can ensure the reliable and safe realization of gap detection function and ensure the safety of passengers in the whole process of train departure to starting signal.
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• Research and Implementation of Thai Interlocking Data Automatic Generation Tool#br#
• Liu Xin
• 2024 Vol. 21 (4): 109-115. DOI:10.3969/j.issn.1673-4440.2024.04.018
• Abstract ( ) PDF (2127KB)( )
• In view of the problems such as complex format of Thai interlocking table, low efficiency of manual data configuration, and dependence of the configuration process on the technical level of personnel, this paper proposes an automatic generation method of Thai computer based interlocking data. Taking Thai interlocking table, block table, crossing table and station map files as input, various data models are defined, the topological relationship between data models are established, and the railway station topology model is built. The complex formats in input files are classified and analyzed, and the interlocking data is automatically output based on the topological relationship and other information in the station map. Using the above ideas to develop tool software, the results show that the tool can generate Thai interlocking data quickly and accurately, and improve the automation and efficiency of compiling interlocking data.
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