• Research on Application of Key Technologies for UAV Intelligent Inspection of Railway Flood Control and Disaster Prevention
• Li Bin, Zhang Junwu, Wang Shuang
• 2025 Vol. 22 (3): 1-8. DOI:10.3969/j.issn.1673-4440.2025.03.001
• Abstract ( ) PDF (3402KB)( )
• In order to solve the problems of low efficiency, low recognition and alarm rate, and low accuracy of auxiliary assessment and judgment during inspection operation, and high operational risks for on-site inspection personnel in the process of identifying flood control and disaster prevention risks along railway lines, the construction plan of an intelligent inspection system for railway flood control and disaster prevention based on "drone+AI" is proposed. The industry policies and plans related to low altitude economy are studied, and the current application status of drones in the railway industry and the needs of railway flood control and disaster prevention are summarized and analyzed. Under the technical framework of "intelligent inspection of railway flood control and disaster prevention based on multi-sensor fusion", a UAV intelligent inspection system that meets the on-site inspection needs of the railway industry during the flood season has been designed and developed, with a focus on exploring the system composition, functions, and core key technologies. Through long-term on-site experiments and emergency drills during the flood season, the effectiveness of the intelligent inspection system of railway flood control and disaster prevention based on "drone+AI" and the accuracy of the recognition algorithms of natural disasters and safety events have been verified, providing strong technical support for strengthening railway safety control and emergency response capabilities.
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• Adaptive Safe Mounting Platform Based on Inspection UAVs of Marshalling Yards
• Li Fei, Li Daming, Meng Xiaoyang, Quan Chao, Wu Hao
• 2025 Vol. 22 (3): 9-14,28. DOI:10.3969/j.issn.1673-4440.2025.03.002
• Abstract ( ) PDF (1238KB)( )
• In order to solve the problems of the inability of the existing UAVs to adapt to different types of mounting equipment and the safety of UAVs and their mounting equipment in the case of accidental falling, this paper designs an adaptive safe mounting platform for UAVs. The proposed platform uses the multi-voltage conversion technology, the multi-power balanced supply technology, the Bluetooth low-power emergency positioning technology, the fall recognition algorithm, etc., together with the six-star adaptive buckle structure and fall protection ejection structure designed for complex scenes, which meets the needs of UAVs to adapt to any type of mounting equipment during operation in the complex scenes of the marshalling yard, reduces the economic losses related to the accidental falling of UAVs and their mounted equipment, and also reduces the safety risks caused by the rapid falling of UAVs.
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• Research on Drone Countermeasure Technology along Railway Lines Based on Directional Transmission
• An Zhihang, Yang Yixuan, Cao Hefei, Niu Jiangtao, Yang Jingbo
• 2025 Vol. 22 (3): 15-20. DOI:10.3969/j.issn.1673-4440.2025.03.003
• Abstract ( ) PDF (1735KB)( )
• With the increasing popularity and application of drone technology in the low-altitude economy, potential threats posed by illegal (rogue) drones to railway operations have become more prominent. To address this issue, this paper proposes a drone countermeasure solution based on signal reception and directional transmission technology. Through modular deployment of signal reception and directional transmission devices, continuous interference signal coverage can be provided in the complex railway environment, effectively preventing illegal drones from approaching railway areas. Meanwhile, to avoid interference with normal inspection drones, a customized anti-jamming module for inspection drones is used to ensure their stable operation in complex electromagnetic environments. Simulation and experimental results indicate that the proposed solution not only has high technical feasibility but also enables low-cost and sustainable drone countermeasures along railway lines, enhancing the railway's safety protection capabilities.
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• Research on Method and System for Reproducing Onboard Equipment Operation Process of Train Control System
• Zhang Youbing, Wang Jianmin, Chen Zhiqiang, Wu Peidong
• 2025 Vol. 22 (3): 21-28. DOI:10.3969/j.issn.1673-4440.2025.03.004
• Abstract ( ) PDF (1580KB)( )
• The onboard train control equipment for high-speed railways is the core equipment to ensure the safe and efficient operation of these trains. Onboard equipment failures reduce traffic efficiency, and even affect traffic safety. Therefore, it is necessary to quickly locate the root cause of onboard equipment failures and solve these failures, so as to improve system reliability and availability. This paper proposes a method and system for reproducing the operation process of the onboard equipment based on historical operation records. The proposed system can quickly locate the root causes of faults, and solve intractable problems that cannot be solved only by analyzing data, such as complex logic, complex scene and small probability event, thus improving system reliability and availability.
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• Method and Application of Dynamic Simulation forLocomotive-traction Train Braking System
• Wang Wenbin, Deng Yibing, Song Zongying, Han Xingbang
• 2025 Vol. 22 (3): 29-35,59. DOI:10.3969/j.issn.1673-4440.2025.03.005
• Abstract ( ) PDF (1546KB)( )
• For locomotive-traction trains, which have different dynamic characteristics from  multiple-unit trains, it is not suitable to directly use the "stage-velocity-acceleration" dynamic model calculation formula for modeling. Therefore, this paper proposes a dynamic simulation method for locomotive-traction train braking system, which can achieve independent simulation of electric and air braking of locomotive-traction train braking system, and can simulate the air pressure changes and corresponding braking force changes of train pipe, auxiliary air cylinder, and brake cylinder during the process of train pipe charging and discharging. The proposed method can meet the normal operation and testing requirements of locomotive-traction train on-board equipment, and effectively improve the testing accuracy of locomotive-traction train on-board equipment.
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• Research and Application of Moving-Block Train Control System in Industrial and Mining Railways
• Zhang Yantong, Xu Xianliang
• 2025 Vol. 22 (3): 36-45. DOI:10.3969/j.issn.1673-4440.2025.03.006
• Abstract ( ) PDF (1570KB)( )
• In response to the development needs of improving railway quality and efficiency for industrial and mining railways, and in view of the latest technical developments in such fields as Beidou positioning, wireless communication, automatic control and railway signaling, this paper proposes a moving-block intelligent train control system based on Beidou positioning, which provides a complete solution and complete set of technical equipment for a new train control system in the district transfer mode of railway locomotives in the mining area. The proposed system features comprehensive utilization of such key technologies as multi-source heterogeneous fusion positioning based on Beidou system, moving block, and IP wireless communication based on public network, and uses innovative design in terms of vehicle-ground redundant wireless communication, train length calculation and initial train positioning. Suitable for the construction of new lines and the upgrading of existing railways, it achieves the goals of improving transport efficiency, reducing construction and operation costs, and developing digital intelligence.
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• Research and Application of Automatic Testing Tool for Data Control Center Equipment in Heavy-Haul Railways
• Yang Peigang, Cao Xiaoyu, Liang Chunyan
• 2025 Vol. 22 (3): 46-52,130. DOI:10.3969/j.issn.1673-4440.2025.03.007
• Abstract ( ) PDF (1577KB)( )
• This paper proposes an automatic testing technology of Data Control Center (DCC) equipment for heavy-haul railways, including design architecture, testing process and data processing method. The test steps are abstracted into test instructions through test scenario analysis; the engineering data and interface data are analyzed and a station data model is established to support automatic generation of test cases; and the automatic sending and receiving of interface data is implemented for the peripheral simulation equipment through the script method, and the messages are extracted and parsed for each route to enable easy verification by testers. The proposed tool enables automatic establishment of test environment and automatic test execution for the DCC equipment. It also achieves successful application during the DCC equipment delivery testing of Zhunchi Railway, greatly improving testing efficiency and quality, and reducing manual testing intensity. The test results prove the usefulness of the proposed automatic testing tool for DCC equipment in heavy-haul railways.
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• Analysis of Alarming for False Stopping of Signals Caused by Conversation Mechanism
• Yan Zhiwei
• 2025 Vol. 22 (3): 53-59. DOI:10.3969/j.issn.1673-4440.2025.03.008
• Abstract ( ) PDF (4449KB)( )
• This paper discusses the alarming phenomenon of false stopping of signals caused by the inter-system session mechanism. On the basis of a review of the inter-system session mechanism, it proposes the corresponding treatment suggestions and preventive measures for equipment alarms. This research aims to provide valuable reference and guidance for relevant practitioners, to ensure the safe and efficient operation of high-speed railways.
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• Research on Remote Operation and Display Technology of CBI
• Shi Zhikui, Chen Qiang, Zhou Jie
• 2025 Vol. 22 (3): 60-64,91. DOI:10.3969/j.issn.1673-4440.2025.03.009
• Abstract ( ) PDF (1279KB)( )
• The operation & display computer is the key channel for man-machine conversation of Computer Based Interlocking (CBI), sending down operation commands and feeding back execution results. The host and operating terminal of the operation & display computer are generally located at different places of the same signaling tower, but there are still remote operation requirements derived from some practical application scenarios. For example when the interlocking system of unattended railway stations needs to operate in the manual control mode, the on-duty traffic controller expects the remote end to achieve the same operation and indication effect as the local end. This paper analyzes how to reproduce the graphical, textual and voice information of the local operation & display computer at the remote end through computer and communication technologies, and feedback the operation commands of the remote end to the local end, thereby achieving the purpose of remote operation and display.
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• Research on Safety Technology for Vehicle-Ground Communication System of Train Control System for Heavy-Haul Railways Based on
• Xie Hehuan, Yan Xiang
• 2025 Vol. 22 (3): 65-71. DOI:10.3969/j.issn.1673-4440.2025.03.010
• Abstract ( ) PDF (1678KB)( )
• The vehicle-ground communication technology of the train control system for heavy-haul railways based on public network is implemented by combing the virtual private network technology with the network protection technology. This not only avoids the complexity and high cost of building a private network, and significantly shortens the project cycle, but also maintains the efficiency of data transmission, thus becoming the preferred strategy for vehicle-ground communication of the train control system for heavy-haul railways. However, there are inherent security risks in the public network environment. In order to ensure the reliability and security of vehicle-ground communication, this paper proposes a targeted and comprehensive solution for secure vehicle-ground communication on the basis of a detailed and comprehensive analysis of existing network security technologies. The proposed solution features comprehensive utilization of multiple security technologies, to ensure the security and confidentiality of vehicle-ground data during public network transmission, and provide important guarantee for the stable operation of the train control system. It enables the train control system for heavy-haul railways to resist external threats, which effectively maintains information security and integrity, and provides strong technical support for the operational safety and efficiency of heavy-haul railways.
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• Research on Wireless Network Quality Monitoring and Early Warning System of GSM-R
• Li Lei, Yang Zhibin, Jia Hezhi
• 2025 Vol. 22 (3): 72-78. DOI:10.3969/j.issn.1673-4440.2025.03.011
• Abstract ( ) PDF (4091KB)( )
• As there is no early warning mechanism of potential environmental hazards in the GSM-R wireless network of CTCS-3 lines, a large amount of manual analysis work about the monitoring data from various interfaces is required to identify quality problems in the wireless applications of CTCS-3 lines. On the basis of the monitoring data from three existing interfaces, the data mining and analysis technologies, data visualization technology and automatic learning technology are used for the automatic statistical analysis and in-depth exploration of uplink and downlink levels, communication quality, BTS handover and abnormal event with large TA value in the wireless network. The degradation trend of the BTS performance and the MT performance is detected in advance, to achieve the  wireless network quality monitoring and early warning functions of CTCS-3 lines, thereby moving the safety risk threshold forward, identifying, addressing and solving the potential hazards in advance, and reducing the probability of CTCS-3 timeout.
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• Research on Renewal and Retrofitting of AFC System on Existing Lines of Urban Rail Transit
• Fu Baoming, Zhang Ning, Zhang Bingsen
• 2025 Vol. 22 (3): 79-85. DOI:10.3969/j.issn.1673-4440.2025.03.012
• Abstract ( ) PDF (1835KB)( )
• The equipment renewal and retrofitting on existing lines of urban rail transit has become a key focus of industry development. However, there is a lack of corresponding policies and guiding documents for various electromechanical systems. Firstly, this paper introduces the current situation and equipment composition of the automatic fare collection system of the existing lines, analyzes its development trend, and determines its service requirements in terms of equipment upgrading and retrofitting. Then, on the basis of the industry-leading technologies and actual operational needs, it proposes specific renewal and retrofitting items, such as architecture update, module updates, layout update, and equipment type updates. Finally, from the perspectives of technical standards and resource integration, it proposes the implementation strategy for system renewal and retrofitting. The proposed renewal and retrofitting strategy can provide some reference for the renewal and retrofitting work of the automatic fare collection system on existing lines of urban rail transit.
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• Study on Safety Train Control System
• Zhou Jie
• 2025 Vol. 22 (3): 86-91. DOI:10.3969/j.issn.1673-4440.2025.03.013
• Abstract ( ) PDF (1137KB)( )
• The Safety Train Control (STC) system is an important part of the core safety guarantee equipment of the signaling system for urban rail transit. The STC system is established by optimizing the architecture design of the service-proven Communication Based Train Control (CBTC) system for urban rail transit. The optimizations include the utilization of fully-electronic interlocking equipment, the integration between Computer Based Interlocking (CBI) and Zone Controller(ZC), and the achievement of intelligent autonomous control. The STC system not only achieves the basic interlocking logic, but also conducts train management within its jurisdiction, and provides such information as signal authorization to Vehicle On-Board Controller (VOBC). This paper expounds the concept of the STC system, and summarizes its system architecture, external interfaces and function realization. It also analyzes the characteristics and advantages of the STC system, and provides its development outlook.
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• Calculation and Analysis of Train Departure Capacity in Shahetan Depot
• Zhou Suxia, Liu Yishuo
• 2025 Vol. 22 (3): 92-97. DOI:10.3969/j.issn.1673-4440.2025.03.014
• Abstract ( ) PDF (1315KB)( )
• In order to improve the train departure efficiency of Shahetan Depot and meet the demand for additional trains, this paper conducts analysis and calculation on the train departure capacity. Firstly, it lists three key factors that affect the train departure capacity , and then analyzes how these three factors exert influence. Secondly, it calculates the train departure efficiency under the FAO mode. Finally, it provides two suggestions to further improve the train departure capacity. The first is to increase the train running speed in the throat area, so that the train departure capacity can be increased to 11.64 trains per hour. The second is to upgrade the signaling system equipment, so that the train dormancy and awakening time can be further shortened.
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• Research on Application of Control & Display Terminal for Interlocking System in Thailand
• Zhang Qingchen, Zhang Yang, Chen Qiang
• 2025 Vol. 22 (3): 98-103. DOI:10.3969/j.issn.1673-4440.2025.03.015
• Abstract ( ) PDF (1373KB)( )
• As a human-machine interface product with direct interactions with employers, the control & display terminal for the computer based interlocking system has broad prospects in the overseas market. However, there are still many challenges during its application in the overseas market. This paper introduces the main characteristics of the operation & display specification for computer based interlocking systems applicable to the double-track railways in Thailand. After a comparison with the operation & display specification for computer based interlocking systems applicable to the railway stations in China, it analyzes the similarities and differences in five aspects, i.e., display, operation, multiple language, user management, maintenance terminal and control & display terminal. It also summarizes some advantages, makes some suggestions, and discusses the application situation of the control & display terminal for interlocking systems in Thailand. This paper provides some reference for the development of the control & display terminal for interlocking systems in the overseas market.
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• Application of Reliability Design and Analysis Technology in Products for Automatic Passage through Neutral Sections
• Du Lijuan, Wang Guofeng
• 2025 Vol. 22 (3): 104-110. DOI:10.3969/j.issn.1673-4440.2025.03.016
• Abstract ( ) PDF (1312KB)( )
• This paper conducts reliability research based on product structure and functions from both quantitative and qualitative perspectives, with a focus on products related to the automatic passage of trains through neutral sections as the research object. In terms of quantitative analysis, reliability models are established to allocate and predict reliability, and the results of reliability predictions are provided. In terms of qualitative analysis, potential failure modes and their consequences are analyzed, and product fault trees are created to propose improvement measures. Based on on-site fault data collection and reliability statistical results, continuous improvement of products is carried out, along with the performance of reliability management research, to improve the overall reliability of products.
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• Research on RAMS Application in Onboard Signaling System
• Wang Qian, Xu Cunhong, Ren Zhezong, Shi Congcong, Liu Huan
• 2025 Vol. 22 (3): 111-117. DOI:10.3969/j.issn.1673-4440.2025.03.017
• Abstract ( ) PDF (1373KB)( )
• This paper introduces the RAMS management strategy, and analyzes the reliability of various key components of the onboard signaling subsystem. The fault statistics of equipment components are used as the basic data, and calculation model establishment is taken as the analysis method, to analyze the equipment fault modes and their hazards, thereby assessing the existing maintenance mode. This research provides reference for the improvement of maintenance procedures for onboard signaling equipment, to ultimately achieve the goal of improving the operational stability of onboard signaling equipment.
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• Analysis and Improvement of UPS Switching Fault in Communication System for Urban Rail Transit
• Meng Bing
• 2025 Vol. 22 (3): 118-124. DOI:10.3969/j.issn.1673-4440.2025.03.018
• Abstract ( ) PDF (1399KB)( )
• As the core equipment of the communication power supply system for subways, UPS can provide high-quality uninterrupted AC power supply for communication, ISCS and other equipment. In view of the fault that automatic switching to mains supply cannot be achieved at multiple stations on Suzhou Rail Transit Line 3, this paper conducts in-depth analysis and research on UPS working principles, power grid conditions and rectifier protection mechanism as well as fault simulation and playback, to analyze the cause of this fault. It also proposes a plan to improve the control logic of the relevant rectifier software, and presents the testing and verification of this plan, which can provide reference for the prevention, analysis and handling of similar faults.
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• Analysis and Suggestions on Default Telegram for Large-Number Turnout
• Tan Kunlun, Huang Si
• 2025 Vol. 22 (3): 125-130. DOI:10.3969/j.issn.1673-4440.2025.03.019
• Abstract ( ) PDF (1102KB)( )
• In order to ensure that the trains running on high-speed railways do not slow down and change to another track, block posts are generally equipped with large-number turnouts, and the wayside TCC system is equipped with balise groups for large-number turnouts. This paper makes comparative analysis about the default telegrams of active balise for large-number turnouts and its corresponding LEU and TCC before and after the revision of the technical conditions for the application of balises for the train control system. It also proposes that the revised technical conditions cause some new problems in daily equipment operation and maintenance. This paper focuses the analysis on these new problems, and puts forward the maintenance measure of adding relevant information on setting routes with the conditions for sending data packets for large-number turnouts in the maintenance window plan, as well as the optimization suggestion of adding marker information in the corresponding default telegrams.
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