• Modeling and Simulation of Railway Comprehensive Transportation Hub Transfer Based on Petri Net
• Wang Luxi, Zhu Ming
• 2024 Vol. 21 (2): 1-6. DOI:10.3969/j.issn.1673-4440.2024.02.001
• Abstract ( ) PDF (945KB)( )
• Through the comprehensive dispatch of multi-standard rail transit in the station, the comfortable transfer experience of passengers can be improved. To address the multi-standard rail transit comprehensive scheduling problem, this paper uses Petri net as a tool to simulate and establish the basic models of various rail transit modes and mutual transfer channels in the station hub. Furthermore, an overall model is established based on the logical relationships between them. The respective operation plans of multi-standard rail transit are input into the model before being intelligently optimized and improved by the model to provide passengers with a comfortable journey experience.
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• Analysis of Train Departure Intervals in Block Sections with Level Crossings under British Standard System
• Zhang Yuqian
• 2024 Vol. 21 (2): 7-13. DOI:10.3969/j.issn.1673-4440.2024.02.002
• Abstract ( ) PDF (1380KB)( )
• This paper establishes a simplified model of train approach at level crossings under the British standards system. On this basis, it analyzes the running state of trains approaching level crossings, to obtain the level crossing alarm time for automatic level crossings under different initial speeds. It analyzes the key influencing factors of the level crossing alarm time for train approach in the multi-level-crossing section. It also analyzes the train departure interval in the double-track multi-level-crossing section, to obtain the calculation method of the train departure interval for train operation in opposite directions. Moreover, it performs simulation calculation using MATLAB under the simulated scenario of train operation in the multi-level crossing section, to obtain the optimal train departure interval under this simulated scenario.
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• Design and Implementation of Fault Setting Panel for Train Receiving and Departing of CBI Training Equipment
• Wang Dingming
• 2024 Vol. 21 (2): 14-19. DOI:10.3969/j.issn.1673-4440.2024.02.003
• Abstract ( ) PDF (995KB)( )
• In order to address common problems that occur when training personnel responsible for receiving and departing trains using the CBI simulation training system, a fault setting panel for receiving and departing trains is added to the existing CBI training equipment. This addition allows for fault setting and meets the training needs of the personnel. This paper proposes a design for the fault setting panel and for implementing related circuits by examining the training items for addressing the faults of the fixed signal interlocking equipment in stations and based on the working principle of TYJL-ADX CBI equipment. The experiments show that the method of adding the fault setting panel not only satisfies the “fail-safe” design principle but also can effectively solve the common problems in the simulation training system. This method is highly versatile and worth applying to other training equipment.
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• Research on Temporary Speed Restriction Based on Station Wireless Communication
• Qi Yueheng, Du Jianghong
• 2024 Vol. 21 (2): 20-25. DOI:10.3969/j.issn.1673-4440.2024.02.004
• Abstract ( ) PDF (1242KB)( )
• This paper studies the processing of temporary speed restriction under the condition of wireless network coverage only in stations. Under this condition, communication is established with trains to send the following information to the trains: the temporary speed restriction that is applicable to the train's operation path within the station and the temporary speed restriction in the sections. As a result, when trains operate in sections beyond the reach of wireless network coverage, they utilize the temporary speed restriction information received before leaving the station to control the safe operation of the trains. Compared with the method of wireless network covering an entire rail line or the method of setting switchable balises  along an entire line, the temporary speed restriction research method in this paper has lower costs and stronger applicability.
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• CTC 3.0 Multi-job-position Coordination Technology Solution Based on Wireless Private Network
• Wang Jinyang
• 2024 Vol. 21 (2): 26-31. DOI:10.3969/j.issn.1673-4440.2024.02.005
• Abstract ( ) PDF (1154KB)( )
• In the process of promoting the use of the Centralized Traffic Control System 3.0(CTC 3.0) systems, the process management function for the operations of receiving and departing trains is particularly focused on and valued by stations due to the wide coverage of job positions and the need to coordinate multiple such positions in order to facilitate the smooth flow of the process for receiving and departing trains. This paper analyzes the business process of receiving and departing train operations in the station's transportation production process, and combines it with the CTC 3.0 process management function to explore a CTC 3.0 multi-job-position coordination technology scheme based on a wireless private network. The aim is to achieve digitization in the management of the receiving and departing train operation process at CTC 3.0 stations, thereby reducing the workload of station personnel in future practice.
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• Analysis of Key and Difficult Points of Foreign Object Intrusion Monitoring System for Highway Crossing High-speed Railway
• Chen Rongchao
• 2024 Vol. 21 (2): 32-36,66. DOI:10.3969/j.issn.1673-4440.2024.02.006
• Abstract ( ) PDF (1768KB)( )
• This paper is based on the reconstruction project of south section of National Highway No.310 (Xingyang Qiaolou-Cuimiao section) in Zhengzhou of National Highway No.234, which involves the construction of an overpass for National Highway No.234 to cross over Zhengzhou-Xi'an High-speed Railway. The main focus of this paper is to analyze the key and difficult points in the design of the foreign object intrusion monitoring system for the project and propose solutions. This project is the first foreign object intrusion monitoring system design for the operating high-speed railway overpass within the jurisdiction of Zhengzhou Bureau, providing reference and experience for the design and construction of similar projects in Henan and even throughout the whole country of China in the future.
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• Research on Integrated Security Protection Platform for Railway Integrated Video Surveillance System
• Ai Bohui
• 2024 Vol. 21 (2): 37-42,47. DOI:10.3969/j.issn.1673-4440.2024.02.007
• Abstract ( ) PDF (1361KB)( )
• Based on the analysis of the current situation of security protection of railway integrated video surveillance system, this paper presents the design scheme of an integrated security protection platform from the perspective of security. Through the comprehensive identification, exploration and management of all types of assets in the railway integrated video surveillance system, the problems of inconsistent asset management, inadequate security protection and unclear situational awareness are solved. It uses advanced visualization technology to visually display the operating status, performance indicators and safety information of the railway integrated video surveillance system from multiple angles, and constructs a global security view of the railway integrated video surveillance system to realize real-time monitoring and control of the security status of assets, minimize asset risks, and unify the original scattered security management to achieve standardization and automation. It greatly improves the security protection level and management efficiency of the railway integrated video surveillance system.
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• Analysis and Handling of Fault Locations for High-speed Railway Communication Optical Cables
• Lu Shoudong
• 2024 Vol. 21 (2): 43-47. DOI:10.3969/j.issn.1673-4440.2024.02.008
• Abstract ( ) PDF (743KB)( )
• High-speed railway communication optical cables carry information such as train dispatching, command and control, which are an important part of ensuring the safety of high-speed railway transportation. Therefore, the analysis and handling of optical cable faults is particularly important. Through the summary of years of on-site maintenance experience, the analysis and handling methods of optical cable faults are derived, which are helpful to quickly judge and solve optical cable faults and are able to provide a reference for the maintenance of high-speed railway communication optical cables.
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• Research on Vehicle-ground Communication Monitoring Technology for Heavy Haul Railway Public and Private Networks
• Cai Jun
• 2024 Vol. 21 (2): 48-53. DOI:10.3969/j.issn.1673-4440.2024.02.009
• Abstract ( ) PDF (1088KB)( )
• With the application of public and private network technology in heavy haul freight vehicle-ground communication lines, monitoring the public and private networks of heavy haul railways has become an important technical means to ensure network security and stable operation. This paper briefly discusses the LTE public and private network architectures currently applied in heavy haul freight lines, and discusses the structure, functions, interfaces, and key technologies of the public and private network monitoring system. The research focuses on monitoring technology for the entire chain, including technology for the onboard side, the ground side, and even the center side, and ultimately provides prospects for the future promotion of heavy haul railway public and private network monitoring systems.
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• Test Method of New Functions of Heavy Haul Railway Train Control System Based on Beidou
• Shi Lizhu
• 2024 Vol. 21 (2): 54-59. DOI:10.3969/j.issn.1673-4440.2024.02.010
• Abstract ( ) PDF (1277KB)( )
• This paper studies the test method of the heavy haul railway train control system based on Beidou under the condition of wireless network coverage only in stations. Under this condition, the train operation curves are generated to manage the safe operation of trains by the data management and control equipment at the station level through the combination of the information about a train's position in the station, interlocking state and temporary speed restriction state. When the train leaves the station and the wireless network coverage is not available, information is sent to the train in the section by means of short messages of Beidou emergency communication in order to confirm the consistency of train control data. Compared with the traditional train control systems, this heavy haul railway train control system based on Beidou has many innovations in functions, so it is necessary to identify the changed functions and study the test methods.
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• Research on Simulation Testing System for Heavy Haul Railway Train Control System Based on Beidou
• Han Xingbang
• 2024 Vol. 21 (2): 60-66. DOI:10.3969/j.issn.1673-4440.2024.02.011
• Abstract ( ) PDF (1694KB)( )
• Regarding the system composition of the heavy haul railway train control system based on Beidou , the key equipment of the system is taken as the tested equipment. A semi-physical simulation testing system architecture is designed, and key technologies and solutions such as the simulation of the Beidou Navigation Satellite System, block system simulation, and heavy haul train simulation are analyzed. Through system implementation, it has been verified that the design scheme of this simulation testing system is feasible, capable of executing typical operating scenarios of the heavy haul railway train control system based on Beidou, supporting feasibility verification of system technical solutions, facilitating equipment debugging and testing, providing environmental support for equipment research & development and engineering implementation, and offering strong technical support for laboratory system integration testing.
  
  
  
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• Research on Fast and Slow Train Operation Modes of Guangzhou Metro Line 18 and 22#br#
• Ye Fuzhi, Fan Yonghua, Su Hang, Lin Baoluo
• 2024 Vol. 21 (2): 67-71. DOI:10.3969/j.issn.1673-4440.2024.02.012
• Abstract ( ) PDF (849KB)( )
• In view of the complex operation requirements of Guangzhou Metro Line 18 and Line 22, such as long sections and Y-type routing, this paper proposes corresponding fast and slow train operation solutions, and conducts data simulation through simulation tests to form a signal system solution under fast and slow train operation modes, providing effective technical support for signal system design of similar projects.
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• Research on Urban Rail Transit Signal System Scheme Based on Cloud Architecture
• Guo Hongqian, Nan Di
• 2024 Vol. 21 (2): 72-77,102. DOI:10.3969/j.issn.1673-4440.2024.02.013
• Abstract ( ) PDF (963KB)( )
• The signal systems under the traditional architecture have a high degree of independence and cannot achieve information fusion among multiple systems. In order to realize information sharing with the urban rail production network and enable big data mining, the signal ATS subsystem can be included in the urban rail cloud platform. On the basis of ensuring the independence and safety of the core equipment of the signal systems, the ATS subsystem center-level servers and workstations are included in the cloud platform. This paper calculates the computing resource requirements of the ATS subsystem with a reuse ratio of 1.0 as an example. The connection between the cloud part and the non-cloud part of ATS is realized through the core switching network of the cloud platform. The application server and interface server are configured with blade servers, and the database server is configured with a rack server. To meet the requirements of ATS subsystem redundancy and undisturbed switching, the cloud platform provides two sets of server resources with the same configuration for the ATS subsystem. Considering that the urban rail signal systems need to meet the requirements of Level 3 of Information Security Level Protection , the cloud platform should also be built according to Level 3.
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• Study on Control Schemes of Signaling Systems at Level Crossings for Modern Trams
• Lei Bin, Meng Fanchao
• 2024 Vol. 21 (2): 78-83,95. DOI:10.3969/j.issn.1673-4440.2024.02.014
• Abstract ( ) PDF (1034KB)( )
• Considering the line characteristics and actual situation of Lijiang Rail Transit Line 1, this paper studies and analyzes the control schemes of signaling systems at level crossings of modern trams. The structure, functions and interfaces of the level crossing control system and the level crossing signal equipment layout design of Line 1 are described in detail, and the whole process of trams passing through level crossings is deeply analyzed. By focusing on different types of level crossings, and through the equipment layout and interaction between tram level-crossing control system and municipal traffic control system, trams are able to pass through the level crossings safely and efficiently. This paper puts forward a solution for the scenario where there are several types of level crossings on the same tram line and explains the different processing logic for trams passing through different types of level crossings to fully guarantee the safety and operation efficiency of trams.
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• Research on Automatic Binding Method of Passenger and Luggage Information in X-ray Security Scanner
• Zhao Yao
• 2024 Vol. 21 (2): 84-88. DOI:10.3969/j.issn.1673-4440.2024.02.015
• Abstract ( ) PDF (1435KB)( )
• This paper intends to solve the difficulty and inefficiency in manually judging the ownership of passenger luggage during the security check of passenger luggage using X-ray security scanner in railway passenger transport. It proposes a biding and display system for passenger and luggage information using a new method that combines face recognition with time correlation. The structure of the traditional X-ray security scanner and its devices is not changed. The monitoring camera is arranged at the entrance of the X-ray security scanner to capture images of the passengers’ luggage placing process. The appropriate algorithm is applied to calculate the time difference between the luggage placing by the passengers and the X-ray passenger and luggage image acquisition by the security scanner. The face classifier is utilized to rapidly screen the corresponding face images and automatically bind such face images to the X-ray luggage images. The effectiveness of the proposed method is proved by actual hardware and software debugging and binding test data for passenger and luggage information.
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• Research on 5G+Ubiquitous Wireless Fusion Technology in Metro Construction Personnel Positioning
• Si Fuqiang
• 2024 Vol. 21 (2): 89-95. DOI:10.3969/j.issn.1673-4440.2024.02.016
• Abstract ( ) PDF (1386KB)( )
• The large broadband, short delay and wide access of 5G network have laid the foundation of the necessary network infrastructure for all kinds of professions and promoted the continuous enrichment of urban rail transit construction. However, when accidents happen during metro construction, rescue workers cannot obtain the accurate real-time position of the construction site personnel and cannot quickly arrive at the accident site for rescue. In order to effectively solve these problems, this paper, based on the plan of "5G+ ubiquitous wireless" fusion technology, analyzes the advantages and disadvantages of WiFi, Bluetooth, RFID, ultrasonic waves, UWB, and other positioning technologies one by one. After fully considering the underground application scenarios of urban rail transit, a solution of "5G+ Bluetooth" fusion positioning technology is finally proposed. By establishing two networks, namely a 5G network and a Bluetooth positioning network, positioning data is returned and information is reported. This allows 5G micro base stations to become the information hubs of the mobile cellular network and the Bluetooth positioning network, enabling accurate positioning.
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• 基于云平台的中低速磁浮票务系统
• Chen Kehang, Huang Zhiwei, Li Guangzhi, Wu Hao
• 2024 Vol. 21 (2): 96-102. DOI:10.3969/j.issn.1673-4440.2024.02.017
• Abstract ( ) PDF (1085KB)( )
• Ticketing systems are key to ensuring the normal operation of medium and low speed maglev lines. The ticketing systems of traditional urban rail transit usually adopt five-layer structure, which has the characteristics of complex structure and high construction cost. In view of the small scale of the medium and low speed maglev line networks, this paper proposes a medium and low speed maglev ticketing system architecture based on the cloud platform, which reduces the ticketing system architecture to three-layer structure. Then, based on the idea of micro-service, the architecture of the ticketing system is designed, and the functions of each module are designed in detail, which improves the scalability and maintainability of the system. Finally, taking the realization of user access management function as an example, the functions of the main modules in the micro-service architecture are described in detail.
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• Development of New Generation of Safe Turnout Control Circuit
• Chen Jie, Ren Zhezong, Wang Qian, Yu Zhuang, Wang Bingqian
• 2024 Vol. 21 (2): 103-107. DOI:10.3969/j.issn.1673-4440.2024.02.018
• Abstract ( ) PDF (1167KB)( )
• The ZDJ9 AC five-wire switch control circuits exhibit the phenomena of arcing, burning, and oxidation of the first and second groups of strengthening contacts of the 2DQJ relays, resulting in poor contact of the contacts. Due to the fact that the first group of front contacts and the second group of rear contacts of 2DQJ relays are shared contacts, oxidation of these contacts can lead to loss of indication of a switch ; at the same time, there is a risk of instantaneous starting current striking and damaging outdoor diodes, which can also lead to loss of indication of a switch. The principle of the switch control circuits is analyzed, the circuit logic is adjusted, and the ZDJ9 AC five-wire switch control circuits are optimized to avoid loss of switch indication failure and improve the overall reliability of the switch equipment.
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• On-board ATC System Design of Sao Paulo Line 13, Brazil
• Wang Cheng, Liu Junfeng, Liu Jia
• 2024 Vol. 21 (2): 108-113. DOI:10.3969/j.issn.1673-4440.2024.02.019
• Abstract ( ) PDF (2009KB)( )
• This paper introduces the general situation of urban rail transit in Sao Paulo, Brazil, and describes the signal system and system composition of Sao Paulo Metro Line 13. The on-board signal system of this line is analyzed in detail, and the system composition, driving modes and main system functions of on-board ATC are analyzed and discussed. The receiving and processing function of track circuits, the speed monitoring function of release speed  and the monitoring function of train braking force are analyzed in detail, and a design scheme is proposed.
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