• Research on State Departure Technology Based on Moving Block
• Guo Junqiang
• 2024 Vol. 21 (6): 1-7. DOI:10.3969/j.issn.1673-4440.2024.06.001
• Abstract ( ) PDF (1128KB)( )
• This paper establishes a binary tree model composed of sections and switches on the basis of moving block and in view of train operation plan, train status, train location, train braking performance, station section status, switch position and other conditions. Then, the train running path is searched, the nodes of the key switch sections cleared by the train are determined, the time for setting the subsequent departure route is calculated, and the subsequent departure route is set accordingly. The proposed model can change the route setting method from plan-based to state-based setting, and the train departure method from plan-based to state-based departure. Thus, it can shorten the interval of train departure and improve the train departure capacity of the station.
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• Statistical Analysis and Research on Operating Trend of Signal Equipment in Multi-state Mode #br#
• Dong Wenwu
• 2024 Vol. 21 (6): 8-12,22. DOI:10.3969/j.issn.1673-4440.2024.06.002
• Abstract ( ) PDF (1277KB)( )
• By testing and analyzing the electrical characteristic data of signal equipment, it is possible to grasp the trend of equipment operation status and detect abnormal performance of signal equipment in advance. The electrical characteristic parameter indicators of signal equipment are related to their working modes. When the signal equipment operates in different working modes, the magnitude of its operating voltage, current, and other values will change with changes in the working mode. In the case of multi-mode mixed-sampling statistics, it is difficult to quickly distinguish between normal and abnormal changes in data. Taking signal equipment such as tracks and switches as examples, this study explores new ideas for statistical analysis of operating trends of signal equipment in multi-state mode through working mode recognition, data sampling, and statistical analysis of electrical characteristics trends in different modes.
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• Discussion on Improving Safety of Station Tracks Equipped with Integrated Track Circuits of High-speed Railways
• Li Jin
• 2024 Vol. 21 (6): 13-22. DOI:10.3969/j.issn.1673-4440.2024.06.003
• Abstract ( ) PDF (1211KB)( )
• At present, the ZPW-2000 integrated track circuits with the same standard as those used in the sections are widely used in China's high-speed railway stations, and the platform tracks in some stations adopt one-section track circuits. When the train is received at the station, the sending end of the track circuit of the platform track will face the train and send codes to provide trackside information for the train. If the train comes to a complete stop at the station and changes its direction by activating the cab on the intended end, when the starting signal is not at clear , the train may mistakenly receive the information sent by the track circuit of the adjacent line, and the train will depart from the station incorrectly, resulting in safety problems. In this paper, the method of adding an external relay circuit is proposed, and the timing of the train entering and leaving the platform track is determined by the circuit logic, and the concrete measure for applying train tail complementary code is provided, so that the double-end code sending can be realized after the train enters the track to solve the aforementioned problems. This solution only adds a small number of relays indoors, has no outdoor workload, does not need to change the train control software, and can be adapted to suit individual platform tracks of the station. The adaptation process is easy to implement and has minimal impact on transportation. This scheme can provide reference for the solution of safety protection enhancement for platform tracks equipped with integrated track circuits in high-speed railway stations.
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• Head-to-tail Communication Method of Urban Railway On-board Equipment Based on MVB Bus#br#
• Zhang Youbing, Qu Zhong, Wang Shuo, Zhang Jiaxing
• 2024 Vol. 21 (6): 23-29. DOI:10.3969/j.issn.1673-4440.2024.06.004
• Abstract ( ) PDF (1076KB)( )
• The urban railway is a rail transit system that is suitable for connecting the central urban area of the metropolitan area with the surrounding urban clusters, providing public-focused, large volume, fast and convenient transportation services. The urban railway requires that the on-board equipment at both ends of the train be able to perform head-to-tail communication, support automatic turn-back behind the station and automatically change ends in the station. This paper introduces in detail the head-to-tail communication method and technology based on MVB bus, which has been successfully applied to the urban railway on-board equipment. After laboratory testing and inspection, the head-to-tail  communication method and technology proposed in this paper can achieve high safety and high reliability in data communication between the on-board equipment at the head and tail of the train, which is an important basic technology for urban railway trains to realize automatic turn-back behind the station and automatic end change in the station.
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• Analysis and Processing of Failing to Recovery Normally for Semi-automatic Block#br#
• Wang Yuxiang, Dou Liming, Wang Shuqin, Qie Dianju, You Yuqi, Wang Jizhu
• 2024 Vol. 21 (6): 30-36. DOI:10.3969/j.issn.1673-4440.2024.06.005
• Abstract ( ) PDF (1062KB)( )
• Through logical analysis of the phenomenon of recovery faults after train arrivals in a semi-automatic receiving station from a departure station, this paper confirms the lighting status of the indicator lights on the console displays of the two stations under fault conditions, observes the operation of the relays in the recovery circuits of the two stations during faults, tests the receiving and sending voltage values and amplitude of the distributing terminal boards  in the signal mechanical rooms of the two stations during faults, and observes the time length of the pulse signal. This paper then makes full use of microcomputer to monitor and replay the fault phenomenon, browses and compares the  voltage curve status, data, amplitude and pulse time curve status and curve lengths of the negative pulses sent and received by the two stations under the fault conditions, so as to accurately determine the fault range, confirm the fault point, and quickly deal with the fault.
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• Research on Mechanisms of Lightning Hazards and Lightning Protection Measures for ZPW-2000A Track Circuits
• Liu Chunlei, Liu Anbo, Zhang Hao, Zhang Jiaqiang
• 2024 Vol. 21 (6): 37-41,63. DOI:10.3969/j.issn.1673-4440.2024.06.006
• Abstract ( ) PDF (1207KB)( )
• This paper elaborates on the hazard mechanisms of different types of lightning, such as direct lightning, electrostatic induction lightning, and electromagnetic induction lightning. Based on on-site investigation and laboratory testing, this paper analyzes the pathways of lightning intrusion into ZPW-2000A track circuits, comprehensively analyzes the hazard mechanisms and intrusion pathways, formulates corresponding horizontal and vertical lightning protection measures, and explains the lightning protection characteristics such as "leakage", "resistance", and "suspension".
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• Design and Simulation of Power Consumption Calculation Software for Railway Signal Equipment
• Zhang Wenquan, Zhang Xinhua, Chen Dong
• 2024 Vol. 21 (6): 42-46,57. DOI:10.3969/j.issn.1673-4440.2024.06.007
• Abstract ( ) PDF (1095KB)( )
• In railway signaling design, the calculation of electricity consumption for railway signal equipment is very complicated. To simplify the process of electricity consumption design for railway signal equipment,  this paper analyzes various calculation methods of signal load, and uses the VB6.0 programming software to compile the electricity consumption calculation software for railway signal equipment, reducing the difficulty of electricity consumption design for railway signal equipment and improving design efficiency.
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• Quick Analysis Method of Train UDP Data Transmission Reliability
• Xiang Xuehai, Yu Haoming, Yu Zhaowang, Chen Kui
• 2024 Vol. 21 (6): 47-52. DOI:10.3969/j.issn.1673-4440.2024.06.008
• Abstract ( ) PDF (1228KB)( )
• UDP (User Datagram Protocol) does not adopt retransmission mechanism. Packet loss may happen when poor contact or electromagnetic interference occurs, which can affect the link. Quick analysis for a single data file is achieved by using the Wireshark's built-in statistical and ranking functions. Based on the ranking idea, Auto-Array method, which adopts a software algorithm, is further studied. Tests and comparisons show that Auto-Array method can provide quick analysis for multiple data files. Details of the packet loss in UDP data files can also be output. The method can provide criteria for evaluating the reliability of UDP transmission.
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• Conception of Security Defence in Integrated Video Monitoring Systems for Railways
• Dong Xiangkui
• 2024 Vol. 21 (6): 53-57. DOI:10.3969/j.issn.1673-4440.2024.06.009
• Abstract ( ) PDF (737KB)( )
• The paper describes the security defence function of the security platforms of  integrated video monitoring systems of railways. Then it analyzes the classical problems in vulnerability scanning, terminal control, network configuration auditing, etc., within the systems. The paper provides corresponding solutions or suggestions for the problems. It focuses on the maintenance cycles and methods for vulnerability scanning, main requirements for terminal control, as well as key considerations and characteristics of network configuration auditing, etc. Finally, the paper briefly discusses the prospect of the development of the video security-defence platforms when applied in integrated video monitoring systems of railways.
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• Research and Application of Fault Recovery Technology for Trains in Sections Based on Short Message of BeiDou Navigation Satellite System
• Huang Yongcong
• 2024 Vol. 21 (6): 58-63. DOI:10.3969/j.issn.1673-4440.2024.06.010
• Abstract ( ) PDF (1154KB)( )
• There is a situation on railway lines where there is no network coverage in some sections. When the train restarts due to a fault in said sections and there is no network available, it is unable to communicate with trackside equipment to obtain line data, which affects operational efficiency. This paper mainly studies the method of train fault recovery in sections without network coverage, using Regional Short Message Communication (RSMC) technology of BeiDou Navigation Satellite System to solve the problem of train restart due to faults and recovery in these sections.
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• Research on Reliability Enhancement of GSM-R Digital Mobile Communication Base Station Equipment
• Hong Yu, Ma Haixin
• 2024 Vol. 21 (6): 64-69. DOI:10.3969/j.issn.1673-4440.2024.06.011
• Abstract ( ) PDF (1041KB)( )
• This paper takes the architecture features and functions of GSM-R Macro Site equipment in the existing network as the research object, and demonstrates, through RAMS analysis and engineering tests on the operating network, that the reliability, availability and maintainability of a single set of Base Transceiver Station (BTS) currently in use can be improved by enhancing the redundancy of key modules, so as to reduce the probability of the failures and out-of-service of base stations in the network. Reducing the impact of single-module failures of GSM-R base stations on railway services including CTCS-3, and lowering the maintenance timeliness requirements for BTS module failures along the line, both lay the foundation for the continuous, long-term and stable operation of GSM-R Macro Sites in the network, and provide a solid base for safe and stable railway operation.
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• Research on Wireless Data Transmission and Intelligent Analysis System for CIR Equipment
• Zhang Meng, Ou Shengfen
• 2024 Vol. 21 (6): 70-77. DOI:10.3969/j.issn.1673-4440.2024.06.012
• Abstract ( ) PDF (1613KB)( )
• This paper aims to solve the problems in the data download and analysis process of CIR equipment (Cab Integrated Radio) in the railway industry. In response to the current challenges of long data download time and difficult manual analysis, etc., a design scheme for wireless data transmission and intelligent analysis system for CIR equipment is proposed. The current CIR equipment still relies on manual operations for downloading and analyzing data from recording units, which poses potential risks to railway transportation safety due to time lag and low efficiency. The system architecture designed in this article is divided into two parts: onboard acquisition equipment and trackside intelligent analysis system, which are connected through the existing LMD system for communication. The onboard data acquisition equipment is connected to the monitoring interface of the recording unit of locomotive CIR equipment through a dedicated cable, and the data is transmitted to the trackside server through wireless network. The trackside intelligent analysis system realizes functions such as data storage, intelligent analysis, and report statistics. Based on big data technology and distributed architecture, it improves the efficiency of data processing and analysis. The intelligent analysis module in the system can achieve functions such as remote monitoring of device status, intelligent analysis, intelligent evaluation of device usage, and standardized detection task evaluation. After on-site application verification, the system can shorten data download and analysis time, reduce labor costs, prevent CIR equipment failures in advance, and ensure railway transportation safety and efficiency.
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• Design and Implementation of Generic Jog Based on Fully Automatic Operation System#br#
• Fu Di
• 2024 Vol. 21 (6): 78-83. DOI:10.3969/j.issn.1673-4440.2024.06.013
• Abstract ( ) PDF (1021KB)( )
• In the Fully Automatic Operation system of urban rail transit, due to braking failure or poor track conditions and other special circumstances, the train can not stop in the designated position as marked by the stop sign when entering the station, resulting in failure to open the doors, and maintenance personnel can not board the train to deal with the fault. Through the Generic Jog function in the station, the train is controlled to move a short distance, enabling the train doors to open when the train is aligned with the position of the stop sign. This facilitates maintenance personnel in handling faults. In this paper, the Generic Jog function for the above scenarios is designed, Bang-Bang control and Light Brake Demand functions are respectively used for different fault scenarios, and the fully automatic operation system project has been tested and used.  The accuracy of train stopping meets the index requirements of ATO platform accurate stopping, which improves the processing ability under fault scenarios.
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• Safety Design and Implementation of FAO Automatic Wake-up Function Based on FMEA#br#
• Jia Jia
• 2024 Vol. 21 (6): 84-88,95. DOI:10.3969/j.issn.1673-4440.2024.06.014
• Abstract ( ) PDF (811KB)( )
• In this paper, an in-depth study is conducted regarding the train automatic wake-up function of fully automatic driverless trains using FMEA method. The study analyzes the failure modes that may produce dangerous consequences, identifies their corresponding failure causes, and designs appropriate safety measures based on these failure modes and causes. This approach ensures that the fully automatic unmanned driving system reduces the original risks of the system, as well as the risks caused by new functions, to an acceptable degree, and achieves safe and reliable operation.
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• Research on Multi-network Integrated Train Control System for Guangdong-Hong Kong-Macao Greater Bay Area Urban Express Line
• Qu Rui, Lei Bin
• 2024 Vol. 21 (6): 89-95. DOI:10.3969/j.issn.1673-4440.2024.06.015
• Abstract ( ) PDF (1204KB)( )
• As the core system of rail transit to ensure traffic safety and improve transport efficiency, the train control system plays an important role in the design and implementation of multi-network integration. This paper focuses on analyzing the characteristics and differences of the mainstream train control systems from the aspects of construction objectives, system selection, technical routes and other aspects in combination with the construction needs of the multi-network integration of the Guangdong-Hong Kong-Macao Greater Bay Area urban express line, and expounds the integration scheme and difficulties, so as to provide certain ideas and references for the selection and design of the follow-up train control systems.
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• Research on Establishment of Intelligent Emergency Call System for Urban Rail Transit
• Xu Zheng, Zhang Bingsen, Liu Zeyuan
• 2024 Vol. 21 (6): 96-101. DOI:10.3969/j.issn.1673-4440.2024.06.016
• Abstract ( ) PDF (1071KB)( )
• Intelligent passenger service in rail transit requires the establishment of an intelligent emergency call system. In response to the current situation of call methods, this article first analyzes the functional requirements and system requirements of the intelligent emergency call system from the perspective of passengers. Combining the system with the application of new technologies such as artificial intelligence, a call method based on both online and offline is proposed, establishing a three-level system of intelligent calls, manual calls, and on-site calls. In addition, the use of a five-layer architecture is proposed to establish a platform for intelligent calls for assistance, which is divided into device access layer, data input layer, service logic layer, algorithm processing layer, and terminal response layer. This paper designs the response logic and service processes under this system, and uses intelligent distribution algorithms to ensure the nearby triggering and timely response to calls for assistance. Finally, from an engineering perspective, the settings of the call-for-assistance terminal equipment and the required inter-system linkage are proposed. The research in this article will provide reference for the development of intelligent emergency call systems in the future.
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• Research on Schemes for Temporary Operation Control Center of Urban Rail Transit Signaling System
• Song Yuwei, Xiao Ke, Bai Yongjie
• 2024 Vol. 21 (6): 102-109. DOI:10.3969/j.issn.1673-4440.2024.06.017
• Abstract ( ) PDF (2136KB)( )
• Due to the delayed construction period of the Second Dispatching Center of Zhengzhou Urban Rail Transit, the newly built fully automatic operation line cannot be put into operation normally, and a transition plan is urgently needed to meet the initial demand of opening the newly built line for public use. Taking the signaling profession of Zhengzhou Metro  Line 10  as an example, the transition scheme of using the standby control center as the temporary control center is proposed. Based on the introduction of the original plan of the control center, the temporary control center plan is researched, taking into consideration all three factors: the feasibility, operation risks and investment amount. The equipment and spare parts originally placed in each line control center of the Second Dispatching Center are purchased through planning, and the standby control center is upgraded to the temporary control center through secondment and relocation, so as to provide necessary conditions for the opening of all lines. When the Second Dispatching Center is completed and connected, equipment relocation, debugging and network migration  will be carried out for all lines in an orderly manner. The temporary control center will stop operations and the standby control center will resume operations. The scheme reduces operation risks and investment costs through equipment secondment, and has certain reference value for the subsequent railway construction in Zhengzhou and rail transit development in other areas.
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• Creation and Application of Vehicle Simulator Based on On-board ATC System#br#
• Cai Bo, Fang Xiaoyi
• 2024 Vol. 21 (6): 110-115. DOI:10.3969/j.issn.1673-4440.2024.06.018
• Abstract ( ) PDF (2955KB)( )
• ATC signal equipment is an important equipment for controlling rolling stock (subways). The on-board system is closely connected with the control circuit system of the vehicle, and there are many electrical interfaces and information interfaces between them. As the on-board ATC signal equipment and the vehicle belong to two systems, the joint debugging between the systems is affected by many factors such as time, site and so on. At present, there is no equipment available that can independently detect the internal digital signal functions of the boards and cards onboard the vehicle, and there is a lack of special tools to verify the functions of the boards and cards after medium and large-scale overhaul. There are safety risks during the dynamic debugging on the test line after static overhaul. This paper mainly describes a debugging device that replaces professional vehicle equipment. The device is connected with the female head of int connector. Under the static condition of the train, OMAP software is used to force and drive the internal digital signal of the board or card, so as to test whether the internal contact of the board or card works normally. The positions of faulty components can be accurately identified before dynamic train testing. This device improves the efficiency of dynamic train debugging and further improves the maintenance quality and standard.
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• Research and Design of 3D Vibration Test System Based on Vehicle Vibration Mode in Urban Rail Transit#br#
• Huang Yuhua, Shen Zhe, Chen Qi, Qian Jun
• 2024 Vol. 21 (6): 116-122. DOI:10.3969/j.issn.1673-4440.2024.06.019
• Abstract ( ) PDF (3677KB)( )
• The vehicle vibration during operation in the urban rail transit affects the operation of the balise transmission system, resulting in the loss of beacons and the failure of the train positioning. Firstly, this paper analyzes the fundamentals of the balise fault caused by vehicle vibration theoretically. Then, a customized vibration test bench is designed and utilized to simulate vehicle vibration states during operation based on the structure of the balise transmission system and the status of vehicle movements. Finally, the simulations conducted using the vibration test system verify the reliability of the theory, enabling the provision of the corresponding preventive measures to reduce the loss of beacons and the failure of the train positioning.
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• Study on Progress of Railway Regulations of European Union on Mainline Railways
• Zhang Qi, Gao Hongna
• 2024 Vol. 21 (6): 123-128. DOI:10.3969/j.issn.1673-4440.2024.06.020
• Abstract ( ) PDF (982KB)( )
• Centering around the EU regulations on mainline railways, the paper reviews the development process and changes of the railway regulations of the European Union and summarizes the targets of regulation formulation in different stages, with focus on an interpretation of the currently applicable EU regulations and an elaboration of the characteristics and changes of the latest regulations system. It also analyzes the current situation and challenges of the mainline railways of the European Union, which provides guidelines for manufacturers entering the European market.
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