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Train Working Diagram Adjustment Method Based on Scenario Inference
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Qiao Yongtao, Sun You
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2023 Vol. 20 (2):
1-6,17.
DOI:10.3969/j.issn.1673-4440.2023.02.001
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Abstract (
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Train scheduling adjustment has the characteristics of strong effectiveness, high requirements of dispatchers, many optimization indexes, strong dynamics and high modeling requirements, which makes it difficult to optimize train scheduling quickly and effectively. This paper presents a train operation adjustment method based on scenario inference, which realizes the rapid optimization and adjustment of train operation by inferring the trains in the scenario with the minimum operation time. Through the data simulation of Wuhan-Guangzhou high speed railway, the results show that this method has certain timeliness and accuracy in the train operation adjustment. It is of great help to improve the work efficiency of dispatchers and reduce labor intensity.
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Research on Development of Interlocking Automatic Test Tool Using Image Recognition Technology
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Sun Zhike
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2023 Vol. 20 (2):
7-12.
DOI:10.3969/j.issn.1673-4440.2023.02.002
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Abstract (
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In order to further improve the test efficiency of the computer interlocking system, the display and operation functions of the control display interface need to be included in the coverage of the automatic test. Eggplant Functional is a general automatic function test platform based on image recognition technology. The paper introdules the full use of the image recognition technology of Eggplant Functional to carry out secondary development for forming a set of automatic test tool software, which can automatically identify and control the display status of various graphic elements such as signal, switch and track section on the display interface, and automatically control the mouse to complete the test operation, Thus, the control display interface, software function and engineering data of the computer interlocking system can be automatically tested in one test process. After the application of the tool software in the computer interlocking system integration project, the test efficiency and the stability of test quality have been significantly improved.
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Development of Indoor Intelligent Tester for Railway Signaling System
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Jiang Xianjin, Fan Jianwei, Jiang Huaishen, Han Zhipeng
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2023 Vol. 20 (2):
13-17.
DOI:10.3969/j.issn.1673-4440.2023.02.003
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Abstract (
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The indoor intelligent test platform of railway signaling system is an intelligent, multi-functional and convenient engineering field system test equipment. Through the human-machine interface (HMI), the station & yard can be built conveniently and quickly, the operation status of station & yard equipment can be displayed intuitively. It can simulate all kinds of track circuits, signals, switches, buttons and other controlled equipment of the signaling system of the main systems of domestic railway/urban rail transit, and can control/collect the status information feedback of relevant controlled equipment on HMI.
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Research on Server-side Reusable Development Environment of Railway ASIC
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Ma Pan, Lin Ziming
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2023 Vol. 20 (2):
22-26.
DOI:10.3969/j.issn.1673-4440.2023.02.005
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Abstract (
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Railway ASIC (Application Specific Integrated Circuit) is one of the core technologies of train control system of China’s railway transportation. In order to improve the chip design and development efficiency and reduce the later maintenance cost, this paper analyzes the functional requirements of the development environment from two aspects of the chip design and simulation verification of ASIC, and proposes the reusable chip development environment based on linux server side. The design structure, start-up process and application method of the environment are described in detail. The development environment can realize the development, simulation, management and multi-person cooperation from module level to chip level, RTL level to gate level netlist, single test case to test case set, ensuring the reliability of the chip and improving the development efficiency.
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Research on Nanjing-Qidong Railway Coding Design Scheme
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Qing Wenjie
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2023 Vol. 20 (2):
27-32.
DOI:10.3969/j.issn.1673-4440.2023.02.006
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The double track electrification transformation project of Nanjing-Qidong railway adopts the CTCS-2 train operation control system based on relay coding. The coded design scheme needs to meet the locomotive signal requirements of EMU and the conventional speed trains at the same time, so the design scheme is relatively complex and special. In view of the specific situations of dropping codes on the flank receiving line, no codes in the throat area in the reverse departure route on the mainline and insufficient length of the coding section on the flank receiving and departing lines, the paper proposes a reasonable design scheme. The application shows that the proposed design scheme effectively solves the problem that the ground coded equipment does not match the on-board equipment of EMU and the conventional speed trains.
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Research on Edge Computing Technology of Railway 5G Network
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Ge Weitao
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2023 Vol. 20 (2):
33-36,67.
DOI:10.3969/j.issn.1673-4440.2023.02.007
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The edge computing technology can not only greatly reduce the end-to-end service delay, but also effectively reduce the back bandwidth caused by data back to the core network. Therefore, the application of edge computing technology in railway is worth further study. This paper first introduces the system architecture of edge computing in 5G network, then introduces three common diversion schemes of edge computing, and analyzes their application scenarios. Finally, combined with the service characteristics of four application scenarios of railway passenger station, freight station, line and train, this paper puts forward the deployment suggestions of network edge computing for reference for future railway 5G edge computing applications.
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Discussion on Emergency Communication System of Railway in Complicated and Dangerous Mountainous Area
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Li Lei, Yu Chao
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2023 Vol. 20 (2):
37-41,48.
DOI:10.3969/j.issn.1673-4440.2023.02.008
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Complicated and difficult mountain railways have many difficulties such as complex topography, strong geological structure activities, and frequent geological disasters. This poses a huge challenge to emergency communication guarantee. It is urgent to explore an emergency communication system solution suitable for complex and difficult mountain railways. Based on the current situation and the existing problems of railway emergency communication, combined with the complex and difficult characteristics of mountain railways, the paper proposes to build a railway emergency communication system of unifying interconnectedness, multi-network integration, global coverage, rapid deployment, and accurate positioning according to local conditions, and puts forward the implementation strategy of emergency communication center platform, emergency field equipment, emergency communication site access network, especially emergency communication coverage in tunnels is proposed, which provides reference for the construction of railway emergency communication system in complex and difficult mountainous areas.
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Scheme Design and Network Optimization of GSM-R System in Complex Line Section of High Speed Railway
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Zhang Jian, Zhu Xiaohao, Wang Weili
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2023 Vol. 20 (2):
42-48.
DOI:10.3969/j.issn.1673-4440.2023.02.009
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It is difficult to avoid the crossing and merging of new high-speed railway and the existing lines, and the line conditions are more complex. This paper introduces the GSM-R system design and network optimization scheme for typical cross parallel lines and continuous tunnel sections of the recently commissioned Huzhou-Hangzhou high speed railway, Zhangjiajie-Jishou-Huaihua high speed railway and other lines, and gives specific wireless design solutions for scenarios related to multipath interference, level inconsistency and poor quality caused by wireless interference. Finally, it summarizes the experience of these projects, and puts forward reasonable engineering suggestions schemes for similar railway sections.
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Research on Onboard Communication Technology Supporting Both Circuit Switching Domain and Packet Switching Domain
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Xie Hehuan
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2023 Vol. 20 (2):
49-57.
DOI:10.3969/j.issn.1673-4440.2023.02.010
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This paper describes a research method of onboard communication technology that supports both Circuit Switching Domain (CS) and Packet Switching Domain (PS) . It emphatically analyzes the basic principles and communication processes of these two communication modes, introduces the basic design method of corresponding vehicle borne wireless transmission unit, and highlights the key protocol stack and algorithm. The onboard wireless transmission unit developed according to the method introduced in this paper has the ability to support circuit switched domain communication and packet switched domain communication in parallel, and can be widely used in various types of onboard systems.
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Data Encryption Strategy of Railway Wireless Communication System
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Li Tongyao, Wang Xiaoyang
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2023 Vol. 20 (2):
58-61.
DOI:10.3969/j.issn.1673-4440.2023.02.011
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Due to the openness of wireless signal transmission, wireless communication is always facing the risk of being eavesdropped and attacked. In order to improve the security and reliability of railway wireless communication information transmission, this paper proposes a new encrypted communication strategy that combines quantum communication technology and wireless communication technology, which can effectively reduce eavesdropping and attacks from illegal foreign users on wireless communication data, and improve the data transmission security of railway wireless communication system.
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Setting Method and Technical Prospect of Video Monitoring Front End at Railway Passenger Station
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Zhao Yiying, Jiang Zhiwei
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2023 Vol. 20 (2):
62-67.
DOI:10.3969/j.issn.1673-4440.2023.02.012
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As an effective security technology, railway passenger station video monitoring system can not only assist passenger operators to monitor the situation at the station in real time, but also provide a strong guarantee for early warning, evidence collection and command and rescue work. According to several typical application scenarios of railway passenger stations, this paper puts forward the appropriate selection and distribution mode of video monitoring front-end equipment, expounds the functions and design principles of intelligent video analysis system in combination with Beijing-Zhangjiakou high-speed railway project, and finally prospects the application of new technologies and equipment in the field of video monitoring in the railway industry.
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MSP Protection Ring Service Opening Requirements
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Xia Yan
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2023 Vol. 20 (2):
68-72.
DOI:10.3969/j.issn.1673-4440.2023.02.013
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This paper introduces two fiber two-way transmission of SDH network multiplexing section protection ring (MSP) for the opening of the business requirements. By analyzing the misconnection problem of the existing network and comparing the advantages and disadvantages of multiple ring network protection, the paper makes clear the requirements of the later opening of the transmission channel for the time slot, and puts forward the optimization suggestions on how to rectify the time slot of the existing network transmission channel.
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Research on Information Acquisition Scheme of Intelligent Operation and Maintenance for Urban Rail Signaling System
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Zhou Huan
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2023 Vol. 20 (2):
73-78.
DOI:10.3969/j.issn.1673-4440.2023.02.014
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The information acquisition and processing scheme of traditional signaling maintenance and monitoring system can not meet the development requirements of line-network-level intelligent operation and maintenance system. This paper analyzes the architecture and the main problems of the information acquisition and processing scheme of the traditional signaling maintenance and monitoring system, and puts forward corresponding solutions to the problems of information closure and insufficient data support. The scheme can break the restrictions between lines, master the working status of equipment in the whole network, meet the requirements of information acquisition and processing of the line-network-level intelligent operation and maintenance system, and provide basic data support for the application of big data mining technology and intelligent analysis technology in the intelligent operation and maintenance system.
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Application of Microservice Architecture in Tram Control System
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Wang Hongming, Ning Bo, Jin Yun, Nie Chao
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2023 Vol. 20 (2):
79-82,100.
DOI:10.3969/j.issn.1673-4440.2023.02.015
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This paper introduces some new technologies such as in-memory database and server cluster and micro-service concept in the field of rail transportation, applies them to the original single process program architecture, and uses the micro service architecture to rebuild tram control system, which improves the development efficiency, reduces the workload of development and testing, effectively reduces costs, and has been implemented in actual projects with good results.
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Passenger Service of Urban Rail Transit Station Based on Information Fusion
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Fu Baoming, Li Shunkang, Zhang Ning, Lu Haiting, Wang Lin
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2023 Vol. 20 (2):
83-88,106.
DOI:10.3969/j.issn.1673-4440.2023.02.016
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The paper introduces the types of information required by passengers in the process of travel and the current mode of information service at the station, analyzes the integration needs of service information in terms of information source and information display under the scenario of smart travel, and points out the limitations and deficiencies of current passenger information service; based on multi-source information fusion, it proposes a passenger information service mode of urban rail transit matching the passenger information needs from the two levels of integrated data platform and server; combined with the construction and operation status of rail transit, it puts forward the specific implementation suggestions of this service mode, so as to provide reference for realizing the whole process, all-round and integrated passenger information service, and improve the intelligent information service level of rail transit.
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Research on Leakage Cable Laying Scheme in Rail Transit Modification Project
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Chen Erchao, Wang Xijun, Yang Lixin, Wu Shaofeng
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2023 Vol. 20 (2):
89-94.
DOI:10.3969/j.issn.1673-4440.2023.02.017
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In rail transit modification project, it is difficult to lay leaky cable for many complicated interference factors. This paper studies multi-scenario leakage cable laying schemes in rail transit modification project, describes the general requirements and laying scope of leakage cable, studies the laying scheme in the scenario of tunnel, ground, bridge, and station, presents the laying mode, laying height and laying cross-section view of each scenario, and analyzes the key technical indexes and interference of adjacent cell.
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Problem Analysis of Code Missing and Improvement Measures When EMU Entering Stations
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He Tao, Li Jianfeng, Zhang Xiaodong
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2023 Vol. 20 (2):
101-106.
DOI:10.3969/j.issn.1673-4440.2023.02.019
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For the occurrence of code missing and emergency braking problems when EMU running over the section in rear of a home signal at the conventional speed station, after in-depth analysis of the cause of code missing in this scenario from onboard data and ground data, the paper puts forward the improvement suggestion of extending the length of the first section in rear of a home signal, which can provide reference for the design and construction of other high speed related stations, and reduce the situation of EMU code missing in this scenario.
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月刊
Monthly
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第21卷 第6期 总第期
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Vol.21 No.6 S.No.
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出版:
2024-06-24
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Published on:
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创刊:2004 年
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First Issue: 2004