• Research on Application of BIM Technology in Signal Intelligent Maintenance System
• Liu Yu
• 2021 Vol. 18 (9): 1-4. DOI:10.3969/j.issn.1673-4440.2021.09.001
• Abstract ( ) PDF (971KB)( )
• Compared with traditional operation and maintenance system, the intelligent operation and maintenance system pay more attention to the functions of automatic fault analysis, fault prediction, health assessment and whole life cycle management, etc. Firstly, this paper introduces the application of BIM technology in the whole life cycle management function of equipment information in the intelligent operation and maintenance system of signal system. Then it introduces the core concerns of this technology in the application process from several aspects, such as the BIM modeling principle of signal system, the interconnection of BIM database and real-time update in the production process
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• Research on Level Crossing Function of European Train Control System in Baseline 3
• Wang Jianmin, Zhang Youbing
• 2021 Vol. 18 (9): 5-8,37. DOI:10.3969/j.issn.1673-4440.2021.09.002
• Abstract ( ) PDF (1091KB)( )
• In the Baseline 3 ETCS train control system, for an unprotected level crossing, the onboard equipment protects the level crossing and a train passes through such level crossing at a speed not exceeding the speed limit of level crossing to ensure the safety of the train and level crossing. This paper introduces the basic requirements of safety protection of level crossings, and expounds the methods and typical application scenarios of onboard equipment for safety protection of level crossings
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• Method and Application of Speed and Distance Measurement Simulation Test of CTCS Onboard Equipment
• Bao Pengyu, Ning Yunzhuan
• 2021 Vol. 18 (9): 9-12. DOI:10.3969/j.issn.1673-4440.2021.09.003
• Abstract ( ) PDF (1236KB)( )
• In order to solve the problem that the comprehensive test cannot be carried out for the speed and distance measurement unit of CTCS onboard equipment using the integrated test method, this paper proposes a speed and distance measurement simulation test method. The method can be applied to realize sensor state and disconnection setting, and perform simulation tests for idle running, sliding and other conditions and combined fault tests, effectively improving the reliability of speed and distance measurement system
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• Influence of Interlocking Drive Relay Actions on Low-frequency Codes and Its Optimization Analysis
• Yang Meijun
• 2021 Vol. 18 (9): 13-18. DOI:10.3969/j.issn.1673-4440.2021.09.004
• Abstract ( ) PDF (1281KB)( )
• At present, outdoor signals are controlled by station computer interlocking system through drive relays. Low-frequency codes are compiled and sent to outdoor rails by some of the relay coding circuits through the contacts of signal relays inside a station. Such low-frequency codes are received by a locomotive for train control through the receiving device of track circuits. Therefore, there is a direct correlation between the timing of drive of a relay as configured by a computer interlocking device and the accuracy of low-frequency codes received by a outdoor locomotive. Such direct correlation is particularly obvious in the coding circuits of the approach sections of computer interlocking stations (the same scenario problem occurs in train control coding of C2 stations connected to existing lines). Abnormal low-frequency codes may be received by a locomotive at some point due to the design of coding circuits in certain typical scenarios. Therefore, it is necessary to identify and optimize the coding circuits of approach sections in such typical scenarios to improve the accuracy and comprehensiveness of the coding of approach sections. This paper summarizes the problem of coordination between circuit designs and the sequences of relay actions driven by computer interlocking by analyzing several typical scenarios. Optimization schemes are proposed to avoid problems in engineering practices in the future
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• Low-power IoT Data Distribution System for Rail Transit Monitoring
• Zhang Hongbei, Wang Xiaoyi
• 2021 Vol. 18 (9): 19-24. DOI:10.3969/j.issn.1673-4440.2021.09.005
• Abstract ( ) PDF (1406KB)( )
• This paper proposes a low-power data distribution system based on data distribution services, which balances performance and power consumption by adding a sleep wake-up mechanism to the service. In addition, the system is also connected to the NB-IoT narrowband Internet of Things, which can better reduce the power consumption of the device when a small amount of data is exchanged. Experiments have proved that when the monitoring equipment communicates in a network with limited bandwidth, the use of this system can save about 36% of the power consumption compared with that of the traditional communication system while ensuring the communication performance. In the case of data interaction within the order of 150 Byte, the system uses NB-IoT to replace the bandwidth-constrained network for communication, and the power consumption can be saved by about 48%.
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• Design Scheme of Railway Communication Geographic Information System
• Han Lei
• 2021 Vol. 18 (9): 25-30,42. DOI:10.3969/j.issn.1673-4440.2021.09.006
• Abstract ( ) PDF (1432KB)( )
• Considering the railway communication geographic information data stored in the CIR-GIS management system and its application status in CIR, in combination with the development of GIS technology in railway communication maintenance management, technical management and innovative application, this paper analyzes the actual management and data application of geographic information technology in CIR use, communication network engineering design, operation and maintenance. The planning and design scheme of Railway Communication Geographic Information System is expounded in detail in this paper.
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• Schemes of Expand Intelligent Image Recognition Function Based on Integrated Video Surveillance System
• Lou Kun
• 2021 Vol. 18 (9): 31-37. DOI:10.3969/j.issn.1673-4440.2021.09.007
• Abstract ( ) PDF (1155KB)( )
• With the development of image recognition technology, its applications in various fields have been developed rapidly, including but not limited to face recognition applications, prediction and analysis of densely populated areas, perimeter alarm of limited areas, etc. The deep learning model based on image eigenvalue convolution is gradually improved, and the demand for the establishment of the system in the railway industry is increasing day by day. How to make full use of the existing video system to expand the image recognition function so as to optimize the project investment and transformation scope to the greatest extent has become a key and difficult point in the implementation. Through the analysis of the existing video monitoring system and image recognition architecture, this paper puts forward the solutions to expand the image recognition function based on the existing system, compares different schemes, and summarizes the factors that need to be considered in early construction for later expansion, so as to provide reference for the implementation of follow-up projects.
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• Indoor Positioning and Navigation System Based on SSM Framework
• Meng Xiaoyang
• 2021 Vol. 18 (9): 38-42. DOI:10.3969/j.issn.1673-4440.2021.09.008
• Abstract ( ) PDF (1311KB)( )
• As the intensity of passenger flow increases in large stations of rail transit, the station dispatch efficiency descreases. The indoor positioning and navigation system adopts SSM as the overall software framework of the system, combines UWB+TDOA positioning technology and 3D modeling technology to realize the precise positioning system of personnel in large rail transit stations. In the test results, the personnel can be effiectively located and the dispatch efficiency in the station is improved.
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• Application of Network Virtualization in Intelligent Railway Dispatching Center
• Zhou Xuebing, Wang Jian, Chen Xiaozhu, Du Wan
• 2021 Vol. 18 (9): 43-48. DOI:10.3969/j.issn.1673-4440.2021.09.009
• Abstract ( ) PDF (1456KB)( )
• This paper mainly summarizes and compares the network virtualization technology of intelligent railway dispatching center, and explains the virtualization application scenarios and restrictions. Network virtualization can utilize the excess computing power of equipment on the basis of the original physical topology, improve equipment utilization efficiency, and reduce space occupation, exhaust gas generation and energy consumption, which is of great significance for enterprises to enhance their ability to assume social responsibility.
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• Implementation of Path Search Algorithms in Urban Rail Transit Network Modeling
• Xiao Chen, He Yueqi, Zhao Jiawei, Zhang Ning
• 2021 Vol. 18 (9): 49-53. DOI:10.3969/j.issn.1673-4440.2021.09.010
• Abstract ( ) PDF (1166KB)( )
• The path search algorithm is the basis of the network mode. An efficient search algorithm can guarantee in-time simulation. At present, most of the path search algorithms in the field of rail transit are improved on the basis of the shortest path search algorithm, and the search efficiency needs to be improved. In this paper, a new searching algorithm is proposed based on the characteristics of the rail transit network in Tianjin. Contrasted with other methods, it improves the search efficiency of K short-path obviously, has good portability, and can meet the requirements of real-time simulation
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• Research on Unified Ticketing System for Transportation-Tourism Integration
• Liu Chang
• 2021 Vol. 18 (9): 54-59. DOI:10.3969/j.issn.1673-4440.2021.09.011
• Abstract ( ) PDF (1358KB)( )
• The developing trend of transportation-tourism integration, along with the goal of seamless and convenient travel service for passengers, demands the tourism rail transit ticketing system to be provided with consistent payment media, accompanying reliable and extensively deployed technology. An innovative architecture of unified ticketing system for transportation-tourism integration, taking QR code as payment media, is proposed, meeting the functional objectives and future development trend, based on the analysis of the passenger composition and characteristics of Qingyuan Maglev Tourism Line, along with the research on ticketing system status of urban rail transit, intercity railway system in Guangdong-Hong Kong-Macao Greater Bay Area (GBA) and Changlong theme park. Construction stages and critical tasks are elaborately arranged to guide the project implementation, inspiring potential similar projects.
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• Application of Integrated Monitoring Test in Dashihedong Laboratory
• Yang Yanyan, Liu Qing
• 2021 Vol. 18 (9): 60-64. DOI:10.3969/j.issn.1673-4440.2021.09.012
• Abstract ( ) PDF (1173KB)( )
• Since the opening of the Yanfang line's autonomous fully automatic operation demonstration project, the subsequent new lines in Beijing have adopted fully automatic operation systems. The laboratory integration tests of the Beijing New Fourth Line are all carried out in the Dashihedong Laboratory. Therefore, The test ability of Integrated Supervisory Control System and other FAO core subsystems established is particularly important.This paper first analyzes the environmental resources of the current equipment in the laboratory, and introduces the construction of the minimum test environment ofIntegrated Supervisory Control System , and tests comprehensively the Integrated Supervisory Control System of the new airport line According to the standard of integrated monitoring, and finally explains and summarizes the test problems. In conclusion, the Integrated Supervisory Control System test platform  deployed can meet the actual test requirements, so that the management personnel can effectively assess the comprehensive ability of the laboratory.
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• Cable Routing Schemes of Urban Rail Transit Signaling & Communication Equipment Room
• Lu Haiting, Zhang Yixin, Zhang Ning
• 2021 Vol. 18 (9): 65-68,103. DOI:10.3969/j.issn.1673-4440.2021.09.013
• Abstract ( ) PDF (1822KB)( )
• The cable routing design schemes in signaling & communication rooms have a great impact on the convenience and efficiency of the construction, operation and maintenance of the signaling& communication system. From the perspectives of design, construction, operation and maintenance of the signaling & communication system, this paper introduces the characteristics of three main routing schemes, i.e. lower routing, upper routing and upper and lower routing, analyzes their respective advantages and disadvantages, and compares them from 11 indexes. It concludes that the upper routing scheme should be adopted for the cables in the signaling & communication rooms, and finally discusses the key craft points of the upper routing method. This study provides a reference for the construction and design units to choose the proper routing scheme of signaling & communication rooms.
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• Interface between Platform Door Gap Detection and Signal System in Full-automatic Operation System
• Dong Hongwei, Zhao Bolun
• 2021 Vol. 18 (9): 69-72. DOI:10.3969/j.issn.1673-4440.2021.09.014
• Abstract ( ) PDF (1159KB)( )
• In the full-automatic Operation line of urban rail transit,The train is in the state of driverless. In order to realize the safety protection of the gap between train door and platform door, it is necessary to protect passengers through gap detection and signal system linkage. Through the analysis of the interface between gap detection and platform door and signal system, the paper explores the optimal system design scheme to realize gap detection and platform door and signal system linkage protection.
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• Technical Transformation Measures to Reduce Failure Rates of Internal Contacts of Switch Machine
• Wang Yongqing
• 2021 Vol. 18 (9): 73-76. DOI:10.3969/j.issn.1673-4440.2021.09.015
• Abstract ( ) PDF (4557KB)( )
• Based on the past failure cases of quick-acting contact groups in switching machines of Suzhou Rail Transit, this paper analyses the causes of various types of contact failures, and puts forward corresponding technical improvement measures and their application according to the actual situation in the field, in order to reduce the failure rates of quick-acting contact groups and improve the operation efficiency.
  
  
  
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• On-line Monitoring and Off-line Detection of Relays for Subway PSDs
• Zhou Yang, Li Zhonghua
• 2021 Vol. 18 (9): 77-81. DOI:10.3969/j.issn.1673-4440.2021.09.016
• Abstract ( ) PDF (1550KB)( )
• Based on the fault monitoring of subway platform screen door (PSD), the methods of on-line monitoring and off-line detection of PSD relay are studied. The online monitoring system is capable of real-time monitoring of key circuits and relay contacts in control circuits, displaying faulty circuits, narrowing down fault queries, recording performance indicators of monitoring points, analyzing and comparing long-term change patterns of monitoring points, alarming and indicating the location of faults when safety thresholds are exceeded. The system design is based on the Fail safe principle, and effective isolation measures are adopted to arrange the sensors without interfering with the normal operation of the existing equipment. Off-line detection system makes up for the measurement limitation of on-line monitoring, provides all the electrical parameters of the PSD relay, and provides a test standard for the thorough repair of faulty relays.
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• Application Scheme of LTE-M in Signal System for Wenzhou Rail Transit Line S2 in the First Phase Project
• Zheng Jingxing
• 2021 Vol. 18 (9): 82-85. DOI:10.3969/j.issn.1673-4440.2021.09.017
• Abstract ( ) PDF (3355KB)( )
• This paper introduces the preliminary design background of the signal system of the first phase of Wenzhou Rail Transit Line S2 and the present situation of LTE application in rail transit signal system. The network schemes are analyzed featuring LTE application in the signal system of Line S2. At the same time, this paper expounds potential problems during project execution and their alternative solutions, providing certain guidance for rail transit lines with similar needs and problems.
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• Application of Design Verification of Signal System for Urban Rail Transit
• Cao Ran
• 2021 Vol. 18 (9): 86-89. DOI:10.3969/j.issn.1673-4440.2021.09.018
• Abstract ( ) PDF (1192KB)( )
• According to the purpose of design verification of urban rail signal system, this paper analyzes the relationship and differences between system design and design verification, and shows the necessity of design verification. According to verification strategy and content, this paper explains that verification is an important process for ensuring design quality.
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• UUS Code Issues of Railway Signal Engineering
• Cui Chao
• 2021 Vol. 18 (9): 90-93,98. DOI:10.3969/j.issn.1673-4440.2021.09.019
• Abstract ( ) PDF (1146KB)( )
• According to the definition of UUS code in conventional and high-speed railways, combined with the requirements of train control data compilation, on-board equipment control logic and design specifications for UUS code, the paper analyzes the precautions of UUS code design in railway engineering projects with CTCS-2 train control system, and focuses on the UUS code degradation scenario based on engineering cases, so as to provide reference for future railway signal engineering design.
  
  
  
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• Analysis and Treatment of Typical Problems in Dynamic Test After Train Control System Transformation of Conventional Speed Line
• Wang Dianbiao, Jia Haibin, Liu Yaxi
• 2021 Vol. 18 (9): 94-98. DOI:10.3969/j.issn.1673-4440.2021.09.020
• Abstract ( ) PDF (1198KB)( )
• The paper introduces in detail some typical problems of the train control system for high speed universal combination station during the dynamic test, and puts forward the solution and the related suggestion.
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• Fault Analysis and Suggestions on Fault Handling of Onboard Balise Transmission System of CTCS3-300T Train Control System
• Lü Yanqi
• 2021 Vol. 18 (9): 99-103. DOI:10.3969/j.issn.1673-4440.2021.09.021
• Abstract ( ) PDF (1046KB)( )
• The balise transmission subsystem in the on-board ATP system of CTCS3-300T train control system is especially important. In field operation, it is found that the balise transmission subsystem faults are a major problem affecting train operation quality. In order to ensure the normal operation of 300T ATP balise information transmission system and improve the efficiency of operation and maintenance, this paper analyzes the causes of typical failures and proposes treatment measures based on the principle of balise transmission system and relevant functional tests.
  
  
  
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• Analysis and Discussion of Loss of Occupancy of ZPW-2000A Track Circuit
• Xie Wenlei, Li Yan
• 2021 Vol. 18 (9): 104-106,111. DOI:10.3969/j.issn.1673-4440.2021.09.022
• Abstract ( ) PDF (1800KB)( )
•  Loss of occupancy is a very serious technical problem in the application of ZPW-2000A track circuit, which will lead to the upgrade of railway signals and seriously affect the safety of driving. This paper analyzes and discusses four causes of the problem of ZPW-2000A track circuit occupancy loss, including improper adjustment, bad shunting, detour loop and signal interference on the basis of actual cases.
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• Discussion on Quality Control Methods of ZYJ7 Electro-hydraulic Switch Machines
• Xu Guangshun
• 2021 Vol. 18 (9): 107-111. DOI:10.3969/j.issn.1673-4440.2021.09.023
• Abstract ( ) PDF (1095KB)( )
• The work of the quality control of ZYJ7 electro-hydraulic switch machines is introduced. The status of the quality control of ZYJ7 electro-hydraulic switch machines is reported. According to the practice, the quality control of ZYJ7 electro-hydraulic switch machines is improved, and a set of relatively complete quality control methods of ZYJ7 electro-hydraulic switch machines is summarized. The main manufacturing control work is divided into three parts: the quality control of the source of the parts, the quality control of the key process of the whole machine assembly and the control of the whole machine performance inspection. The recent work results of the control work are summarized. Finally, the prospect of potential solutions to the deficiencies in the current quality control work of ZYJ7 electro-hydraulic switch machines is proposed.
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• Standardization Development of Signaling and Communication Equipment and System for Rail Transit
• Huang Yaqian
• 2021 Vol. 18 (9): 112-115. DOI:10.3969/j.issn.1673-4440.2021.09.024
• Abstract ( ) PDF (972KB)( )
• This paper introduces the current situation of international standardization of signaling and communication equipment and system for rail transit and the international standardization work in China, analyzes the development of standardization in China in this field, and puts forward the measures and suggestions for standardization in the future.
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• Application of CTCS-3 Train Control System in Overseas Railway Projects
• Quan Hongyu
• 2021 Vol. 18 (9): 116-120. DOI:10.3969/j.issn.1673-4440.2021.09.025
• Abstract ( ) PDF (1278KB)( )
• The application of the CTCS-3 train control system in overseas projects is analyzed and discussed. Firstly, the application scenarios of the CTCS-3 train control system in overseas projects are analyzed, then the adaptability of the technical standards for overseas projects is analyzed, and the optimization scheme of the CTCS-3 train control system for overseas projects is proposed.
  
  
  
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