• Discussion on Platform Side Information Prompt Function of On-board Equipment with ATO
• Xiao Xing, Xu Xiaoning, Liu Lei, Sun Di
• 2021 Vol. 18 (7): 1-3,29. DOI:10.3969/j.issn.1673-4440.2021.07.001
• Abstract ( ) PDF (1108KB)( )
• This paper analyzes the relevant specifi cations of CTCS and ETCS, and studies platform 
  side information prompt function of on-board equipment with ATO, which will provide some reference for further improving interoperability of ATO system
  
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• Design of Wireless Advance Notice of Departure Route in CTC System for Conventional Railway Stations
• Liu Kaiku, Feng Zhenguo, Ma Fulong
• 2021 Vol. 18 (7): 4-7. DOI:10.3969/j.issn.1673-4440.2021.07.002
• Abstract ( ) PDF (1098KB)( )
• Based on the analysis of the current status of transportation organization of conventional railway, combined with the application effect of advance notice function of receiving route for CTC system, this paper expounds the research and design of realizing the advance notice  function of train departure route in CTC system of conventional railway. The advance notice of departure route can effectively reduce the risk of wrong arrangement of departure routes in multi-directional stations, and help to ensure the safety of train operation.
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• Research on Segmentation Method of Train Braking Curve Based on Particle Swarm Optimization
• Bao Pengyu, Chen Zhiqiang, Wang Jianmin, Yu Xiaona, Zhang Youbing, Zhang Guijuan
• 2021 Vol. 18 (7): 8-11. DOI:10.3969/j.issn.1673-4440.2021.07.003
• Abstract ( ) PDF (1214KB)( )
• As When the braking deceleration performance curve of trains need to be processed in a segmentation and approximation way, the braking curves of different types of trains are quite different, there is no unified braking curve segmentation scheme. This paper proposes a method of train braking curve segmentation based on particle swarm optimization. This method takes the braking segment point as the optimization parameter and the braking distance as the optimization target, which can realize the optimal approximation of any segment of the train braking curve. Since this method has nothing to do with the type of train, the shape of the braking curve, and the number of segments, it can be applied to the braking curve segmentation of all kinds of trains and has good application value
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• System Version Management Method for ETCS Baseline 3
• Zhang Youbing, Chen Zhiqiang, Wang Jianmin, Yu Xiaona
• 2021 Vol. 18 (7): 12-17. DOI:10.3969/j.issn.1673-4440.2021.07.004
• Abstract ( ) PDF (1076KB)( )
• In ERTMS / ETCS system, different lines in different countries may operate different system versions. In order to support transnational and cross line operation, on-board equipment is required to support multiple compatible or incompatible system versions. Therefore, on-board equipment is required to effectively manage system versions to improve system availability and transportation efficiency. This paper introduces the basic concept of system version, expounds the principle of determining the operated system version of the equipment, and introduces the methods of on-board equipment processing trackside datas of different versions, and finally illustrates the common scenarios of system version management with examples.
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• Discussion on Integration Solution of DMS and LAIS System Equipment for EMU
• Zhang Mingxing
• 2021 Vol. 18 (7): 18-21. DOI:10.3969/j.issn.1673-4440.2021.07.005
• Abstract ( ) PDF (1452KB)( )
• The mastering of real-time operating status information of EMU on-board equipment is of great significance for the timely prevention and handling of on-board equipment failures. By analyzing the main functional modules of real-time monitoring of DMS and LAIS system equipment installed on EMU, this paper discusses the feasibility and necessity of equipment integration of DMS and LAIS system installed on EMU
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• Discussion on Conversion Scheme of Movable Rack in Rack Rail Turnout Section
• Wang Jianqiang, Lu Jianfeng, Chen Zhihui, Yang Jizhong
• 2021 Vol. 18 (7): 22-24,53. DOI:10.3969/j.issn.1673-4440.2021.07.006
• Abstract ( ) PDF (1286KB)( )
• This paper introduces the structural form of the rack rail turnout and the technical scheme of foreign rack rail turnout conversion. Based on the current status of domestic conversion technology and the principle of operating, the structure and design scheme of the rack rail turnout conversion are proposed.
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• Analysis of Typical Failure Cases and Optimization Measures for CTCS-3 Downgrading of High Speed Railway
• Tao Yuyong
• 2021 Vol. 18 (7): 25-29. DOI:10.3969/j.issn.1673-4440.2021.07.007
• Abstract ( ) PDF (1367KB)( )
• This paper sorts out and analyzes the typical failures of the high-speed rail CTCS-3 degrading within the scope of control in 2020, conducts an in-depth analysis, and proposes corrective measures. The measures have been used in practice to meet on-site operation requirements, improve the stability of CTCS-3 operation, and play a certain guiding and reference role in the CTCS-3 degrading analysis and RBC maintenance management of electrical services
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• Design of Multi-task Linkage Control System for High-speed Railway Based on Fuzzy Control
• Zhao Mingyue, Li Xia, Fan Xugang
• 2021 Vol. 18 (7): 30-35. DOI:10.3969/j.issn.1673-4440.2021.07.008
• Abstract ( ) PDF (1804KB)( )
• In view of the high speed railway operation multi-task emergency drill organization difficult, involved in many professions, limited training monitoring and management, with low efficiency, and difficult for coordination and organization among various bureaus, a high-speed railway multi-task linkage control system based on fuzzy control is designed in this paper. The system adopts fuzzy control method, takes railway employee's experience as fuzzy rule, outputs drill process through fuzzy reasoning and anti-fuzzification. It can effectively solve the problems in the field of high-speed railway operation, such as the difficulty of multi-task practical cooperation exercise, the difficulty of emergency plan exercise and scheme selection, and the high cost. It has a broad application prospect in the field of rail transit training.
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• Research on Scheme of Railway Video Monitoring System Based on Quantum Communication
• Cheng Xue , Sun Qiang
• 2021 Vol. 18 (7): 36-39,44. DOI:10.3969/j.issn.1673-4440.2021.07.009
• Abstract ( ) PDF (1147KB)( )

• In order to further enhance the security of railway video information transmission on optical fiber lines, combined with the structure of the railway integrated video monitoring system, the use of quantum communication technology to encrypt and transmit railway video sensitive information is studied, and the railway video monitoring quantum networking scheme is proposed for the first time. Aiming at the problems of long-distance transmission of quantum signals and optical fiber loss encountered in the scheme, two key technology solutions of trusted relay and wavelength division multiplexing co-fiber transmission are respectively proposed, so that the quantum communication networking scheme has a certain feasibility and practical significance.

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• Design and Implementation of Cross Platform Intelligent Travel APP Based on Cordova
• Wang Xin
• 2021 Vol. 18 (7): 40-44. DOI:10.3969/j.issn.1673-4440.2021.07.010
• Abstract ( ) PDF (1347KB)( )
• In order to effectively improve the intelligent level of coordinated transportation and service of regional rail transit, and provide one-stop, interactive, personalized and intelligent information service for the public, a cross platform intelligent travel APP based on Cordova technology is designed and implemented. The APP mainly includes travel planning, indoor route navigation, electronic ticket purchase, planned travel information query, train number query and starting station query, historical travel management and other functions of map mode and road network mode. In addition, using Cordova technology to develop cross platform APP has the advantages of easy function update and iteration, low developing cost and so on. After testing, the system runs well, and can meet the requirements of travel planning in cross system transfer.
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• Practice of Operation and Maintenance Management for Railway Data Center Infrastructure
• Li Bin
• 2021 Vol. 18 (7): 45-49. DOI:10.3969/j.issn.1673-4440.2021.07.011
• Abstract ( ) PDF (1047KB)( )
• Based on the current status of operation and maintenance management for railway data infrastructure, combined with the actual situation of China's railway operation and management, the overall architecture of an operation and maintenance management system for railway data center infrastructure that meets the national conditions and market conditions is proposed. The multiple technologies are integrated and together build a DCIOM and pilot applications are carried out in the railway field to explore the best path for railway data center infrastructure operation and maintenance management. Finally, the development of the railway industry DCIOM is prospected. DCIOM, intelligent operation and maintenance platform, and intelligent operation and maintenance robots will soon become research and investment hotspots for the railway industry's IT infrastructure operation and maintenance.
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• Application of Onboard Image Intelligent Detection System for Leaky Coaxial Cable
• Yin Zhao
• 2021 Vol. 18 (7): 50-53. DOI:10.3969/j.issn.1673-4440.2021.07.012
• Abstract ( ) PDF (1254KB)( )
• Because the leaky coaxial cable is mainly laid in the sections with poor wireless signal coverage, such as railway tunnels and curves, and high-speed train operation may cause the wind tunnel effect, the leaky cable and fixed components are easy to cause looseness, falling off and other situations, and there are serious driving safety risks. In this paper, the onboard image intelligent detection system for leakage coaxial cable is studied, and the system is applied to the actual inspection work to improve the detection quality, detection efficiency and personnel efficiency.
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• Message Transmission Based on SBA in 5G Core Network
• Zheng Wei
• 2021 Vol. 18 (7): 54-57. DOI:10.3969/j.issn.1673-4440.2021.07.013
• Abstract ( ) PDF (1059KB)( )
• This paper studies and analyzes the message transmission protocol in the core network of 5th Generation mobile communication system. First the basic concept of Service Based Architecture (SBA) is introduced, and then Service Based Interface (SBI) is also introduced and the reference model is analyzed. Then a simplified basic 5G network architecture based on SBA is drawn through the analysis of the basic requirements of mobile communication network, and the simple operation mechanism of the structure based on SBA is described. Finally, the practical application of the framework and interface is described by using an example, which confirms the general trend of IT-based development of message transmission in mobile communication network.
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• Design and Implementation of Digital Test Information Management System
• Wang Airong
• 2021 Vol. 18 (7): 58-62. DOI:10.3969/j.issn.1673-4440.2021.07.014
• Abstract ( ) PDF (1097KB)( )
• In view of the problems such as too much production field test information, heavy test task, low management efficiency, large workload, lack of unified monitoring on site, non-uniform and non-standard storage of test data, and difficult data analysis, the digital and automatic management of the information related to the test process, such as resources, tasks, equipment, personnel, data and so on, is realized by extracting all the iconic data involved in the test process, and the information that can be solidified, to strengthen the collection, processing and mining of information, construct a digital-oriented test information management system integrating test process management, test data collection, transmission, processing, output and release, test equipment management, test personnel management and related data analysis. The standard and reliable storage of test data , fine monitoring of test flow, high integration of test information, flexible and multi-dimensional data analysis, scientific management means have been realized to improve the efficiency of product research and development, reduce the cost of test and management, ensure the quality of products, and improve the efficiency of enterprise management.
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• Analysis on Lithium Batteries Application in Existing Line Reconstruction for Urban Rail Transit
• Zhang Fan
• 2021 Vol. 18 (7): 63-66,76. DOI:10.3969/j.issn.1673-4440.2021.07.015
• Abstract ( ) PDF (1067KB)( )
• The volume and weight of lead-acid battery equipment is large. When the environment of the computer room is poor, the operating life of the battery will be affected, the equipment failure rate increases, and there is a risk of thermal runaway. Lithium battery has the obvious advantages of small size, light weight, high temperature resistance, excellent charge-discharge cycle performance, fast charging, more environmental friendly and so on. Therefore, this paper analyzes the characteristics of different types of lithium batteries and compares them with the performance of mainstream lead-acid batteries. Combined with the characteristics of rail transit, the application suggestions of lithium batteries in the reconstruction of existing lines of urban rail transit are put forward.
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• Detection Rod Gap Jamming Fault at Second Traction Point of S700K Switch Machine for Urban Rail Transit
• Yang Liubing, Liu Jun, Chen Liang, Chen Yanxia
• 2021 Vol. 18 (7): 67-71,85. DOI:10.3969/j.issn.1673-4440.2021.07.016
• Abstract ( ) PDF (4620KB)( )
• In this paper, the cause of the fault of detection rod gap jamming at the second traction point of the S700K switch machine on the main line of Ningbo Rail Transit Line 1 is analyzed. Due to the design gap between the frog rail and the base rail at the second traction point, it is not close to each other actually. The frog rail and the switch equipment are more susceptible to vibration, shock, etc., coupled with the combined action of poor working conditions, rail crawling and other additional factors, resulting in the detection rod position deviation, and then lead to detection rod gap jamming fault. Based on the fact that the actual condition of the turnout is difficult to change, a scheme for transforming the detection rod at the second traction point is proposed, and through field test demonstration, it can well meet the needs of field use and improve the stability of the switch equipment operation.
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• Research on Onboard Signaling Equipment Data Management in CBTC System
• Dong Junchao, Li Zhaoling
• 2021 Vol. 18 (7): 72-76. DOI:10.3969/j.issn.1673-4440.2021.07.017
• Abstract ( ) PDF (1204KB)( )
• In order to speed up the construction of urban rail transit, construction needs to be carried out in stages. Therefore, it is necessary to update the data of the onboard signaling equipment during the implementation of projects. This paper proposes a method that can be applied to the interoperable CBTC system to manage, update, and check the data of onboard signaling equipment, which can reduce costs and improve reliability.
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• Study on Turn-back Capacity Based on TACS
• Guo Yushan, Cheng Zhengbo, Chen Shaowen
• 2021 Vol. 18 (7): 77-80. DOI:10.3969/j.issn.1673-4440.2021.07.018
• Abstract ( ) PDF (1295KB)( )
• The turn-back capacity has always been a bottleneck in the operational capacity of urban rail transit. This paper analyzes the turn-back process of a typical station and proposes a plan of subdividing and optimizing turnout control based on the new generation of train-to-train communication signaling control system to improve the turn-back capacity. Through this method, the turn-back capacity can be increased by more than 25% compared with CBTC system, making the operation interval of urban rail transit less than 90 seconds.
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• ARB Judgment Method in CBTC System
• Xu Yangyang, Zhu Wencai
• 2021 Vol. 18 (7): 81-85. DOI:10.3969/j.issn.1673-4440.2021.07.019
• Abstract ( ) PDF (1089KB)( )
• The axle counter fault will cause the subsequent trains to be unable to operate normally, and the axle counter fault will not be solved immediately in a short time, thus reducing the availability of CBTC system. The influence of axle counter section fault on operation efficiency can be reduced by ARB judgment. This paper introduces a kind of ARB judgment method, and analyzes different judgment scenarios in detail to avoid the safety risks or operation efficiency reduction caused by misjudgment or missing judgment in complex scenarios.
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• Detection Method of Obstacles of Medium-low Speed Train in Transit Based on YOLOv3 Algorithm
• Wang Chuanwen, Wang Lei, Huang Renhuan, Qin Rui
• 2021 Vol. 18 (7): 86-89. DOI:10.3969/j.issn.1673-4440.2021.07.020
• Abstract ( ) PDF (1697KB)( )
• In this paper, an obstacle detection method based on YOLOV3 algorithm is proposed for obstacle detection of medium-low speed trains in transit. First, the deep learning algorithm is used to effectively identify obstacles in the scene. Then, the edge detection algorithm based on Freeman chain code is used to extract the edge of the train track, so as to determine whether the obstacles affect the traffic and give a warning to the driver. At the same time, the YOLOV3 network data set is expanded by means of transfer learning, so as to achieve the purpose of improving the target obstacle recognition accuracy by use of this method in a specific scene. The experimental results show that this method has high applicability and is a convenient and efficient obstacle detection method for trains in transit.
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• Research on Urban Rail Transit Ticket System
• Tang Daying
• 2021 Vol. 18 (7): 90-93,106. DOI:10.3969/j.issn.1673-4440.2021.07.021
• Abstract ( ) PDF (1066KB)( )
• With the rapid development of urban rail transit in China, the rail transit fare is a common concern of the government, enterprises and passengers. In this paper, the ticket pricing mode of rail transit, the preferential fare policy, the subway fares in different cities, the types of tickets and the preferential ways are studied.
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• Discussion on Using ATS Information to Judge Turnout Faults
• Teng Donghua
• 2021 Vol. 18 (7): 94-96,112. DOI:10.3969/j.issn.1673-4440.2021.07.022
• Abstract ( ) PDF (1156KB)( )
• In this paper, the change trend and fault state of the switch equipment are predicted  by use of ATS interface display information of Thales signaling system to and the record information of the switch operation time, so as to help the signaling maintenance personnel to master the working condition of switch equipment, and make targeted judgment on the fault to shorten the fault processing time.
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• Design and Selection of Power Conductor Section of Signaling Equipment
• Li Weifeng
• 2021 Vol. 18 (7): 97-101. DOI:10.3969/j.issn.1673-4440.2021.07.023
• Abstract ( ) PDF (1272KB)( )
• This paper introduces the general principle of the selection of signaling power wire section, analyzes the calculation principle of relay, signal lighting, track circuit, switch machine, switch indication and other power wire section, calculates and gives the corresponding reference value, which has a good reference for similar engineering design.
  
  
  
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• Remote Control Scheme of Signal Lighting by Station
• Cai Jinghua
• 2021 Vol. 18 (7): 102-106. DOI:10.3969/j.issn.1673-4440.2021.07.024
• Abstract ( ) PDF (1417KB)( )
• Aiming at the remote control scene of signal lighting by station directly, this paper  analyzes the existing problems of signal lighting circuit in this scene, studies and puts forward some methods to solve these problems, which can provide reference for the following engineering design.
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• Signaling Transition Scheme of Switch Transformation Caused by Rail Structure Optimization in Yantai Station
• Zhu Lun
• 2021 Vol. 18 (7): 107-112. DOI:10.3969/j.issn.1673-4440.2021.07.025
• Abstract ( ) PDF (1271KB)( )
• Taking the switch transformation project caused by the rail structure optimization of Yantai station as an example, combining with the relevant problems encountered in the signal transition project, this paper studies and analyzes the special treatment scheme for the temporary transition of the existing interlocking switches removal and the new switches insertion in the transition project, and puts forward a scientific and reasonable transition scheme. The practice proves that the scheme is safe and reliable, simple to use, saves project investment and reduces the interference to the existing line transportation, and provides reference for similar projects in the future.
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