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Research on Signaling System Scheme of Multi-network Integration of Metropolitan Rail Transit
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Chi Chunling, Zhang Wei, Song Rui, Fu Meng
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2024 Vol. 21 (1):
1-9.
DOI:10.3969/j.issn.1673-4440.2024.01.001
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Abstract (
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According to the network and public transportation characteristics of the metropolitan area rails, the technical goal of integration of signaling systems is proposed, which is, the integration of existing C2/C2+ATO and CBTC systems and the integration of signaling systems using new interconnection technology. Based on the analysis of differences in technical level, working mechanism and system function between the ground and vehicle equipment of the existing mainstream CTCS and CBTC systems, the interconnection schemes of "ground-to-vehicle compatibility" and "vehicle-to-ground compatibility" are proposed. Combined with the current researches of relevant manufacturers, the new interconnection technology route of suburban railway is analyzed.
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Research on Automatic Test Method of Communication Status Between TSRS and External Systems
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Wang Qiuli, Lu Shiyu
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2024 Vol. 21 (1):
10-15.
DOI:10.3969/j.issn.1673-4440.2024.01.002
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Abstract (
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In the new train control system, it is necessary to conduct strict indoor tests on the logical channel and application layer connection status between TSRS and external systems in order to ensure their normal communication connection in the case of partial logical channel failure. This paper proposes an automatic test method and device of the communication status between TSRS and its external systems. The device obtains the IP addresses of TSRS and the external system under test by reading the original input data, and then uses the decision table method to arrange and combine multiple situations to generate a full-traversal test sequence of the logical channel status and application layer connection status of each external system, and then automatically executes the test and records the test results through the IP automatic modification function of the device, and then judges them according to the communication principle of TSRS and the external systems, automatically outputs the expected results, and finally compares the automatic test results with the expected results to generate a final test result table. This method can avoid the omission of test scenarios, ensure the correctness of test results, and quickly improve the test efficiency.
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Multi-level Structural Design and Realization of TIS system
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Lu Fei
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2024 Vol. 21 (1):
21-25.
DOI:10.3969/j.issn.1673-4440.2024.01.004
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Abstract (
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TIS integrates the interfaces and functions of the computer based interlocking system and the train control center system, which brings a number of advantages in field equipment maintenance and real-time system control, but also brings the complexity of software functions. Considering that the equipment needs to have better maintainability and operability in the field, it is divided into levels from the functional structure. For example, the station interlocking relationship, section signal control, track circuit coding, etc. are taken as the functional requirements of CTCS-0 train control system lines, and the temporary speed restriction and switchable balise function are taken as the functional requirements of CTCS-2/CTCS-3 train control system lines. Combined with the data configuration, multi-level modular management can be carried out. The software is designed in structural method with independent modules. The data configuration and software upgrade of different functions do not affect each other, and the coupling between different functional modules is reduced. This is not only conducive to the project implementation, data configuration, software maintenance and fault analysis and location, but also conducive to the analysis of the overall safety of the system.
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Design of Data Transmission System Based on DWC PCIE Core
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Liu Xiaoting
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2024 Vol. 21 (1):
26-29,46.
DOI:10.3969/j.issn.1673-4440.2024.01.005
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Abstract (
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In the railway signaling system, a data sending and receiving system based on DWC PCIE Core is designed to reduce the CPU resource occupancy of railway signaling system. The system adopts FPGA development board suite embedded with ARM Cortex-A9 dual core, which takes the advantage of the flexibility and scalability of FPGA, and uses configurable PCIE hard core IP module and configurable Ethernet hard core IP module. This paper mainly introduces the realization of high-speed and reliable data transmission through PCIE bus and Ethernet based on DMA modules between Host PC and FPGA and between FPGA boards.
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Research on Construction Plan of Railway Line Patrol Platform
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Li Min
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2024 Vol. 21 (1):
30-35.
DOI:10.3969/j.issn.1673-4440.2024.01.006
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Abstract (
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Based on the distribution characteristics of railway video acquisition points, this paper classifies the section video collection points, analyzes the access requirements of the line patrol platform, and puts forward the construction scheme of line patrol platform, which includes four parts: line patrol center platform, station and depot patrol screens, workshop patrol terminals and data transmission channels. The line patrol center platform adopts the cloud collaboration technology to analyze, upload, and alarm on-site video stream, and is connected to the railway comprehensive video monitoring system and other external systems to share resources. Stations and depots are equipped with large patrol screens, and workshops are equipped with patrol terminals. Based on the characteristics of patrol platform construction, a supporting channel construction is proposed. This platform has three major functions including professional management enhancement, intelligent technical defense, and patrol strategy optimization. This paper provides the reference for the construction of railway line patrol platforms.
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Analysis of GSM-R Redundancy Networking Scheme for Long Tunnel of High Speed Railway
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Yuan Tingrui, Xiong Jie, Lu Xiaotong, Jiao Xiaohui
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2024 Vol. 21 (1):
36-41.
DOI:10.3969/j.issn.1673-4440.2024.01.007
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Abstract (
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Long tunnels of high-speed railway need to be covered according to GSM-R redundancy networking scheme. At present, GSM-R network can use two kinds of digital relay equipment: digital repeater and distributed base station. Both of the equipment have a variety of networking solutions. This paper analyzes the fault response capability, carrier frequency utilization, construction cost and other aspects, compares various GSM-R digital relay equipment redundancy networking schemes in high-speed railway tunnels, and proposes the application scope and performance advantages and disadvantages of various schemes.
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Research on Application Scenarios of Mobility Enhancement Technology in 5G-R Network
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Chen Tingde, Wang Hailong, Chen Yu
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2024 Vol. 21 (1):
42-46.
DOI:10.3969/j.issn.1673-4440.2024.01.008
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Abstract (
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Ultra-Reliable and Low-latency Communication (URLLC) is one of the three major characteristics of 5G mobile communication systems, and mobility enhancement is a key technology to achieve ultra-high reliability and low-latency characteristics. The 5G for Railways (5G-R) network also has those requirements, to provide reliable connectivity and enhanced performance for safe and efficient railways. During the high-speed operation of trains, the user equipment (UE) needs to continuously handover between adjacent cells. This paper mainly discusses the application scenarios of three functions of the mobility enhancement technology, conditional handover, dual active protocol stack and fast handover failure recovery, in the 5G-R network. According to the working mechanism of these three functions and the characteristics of the 5G-R network coverage model, this paper believes that the dual active protocol stack and fast handover failure recovery have good application value in reducing service interruption delay and ensuring train operation safety.
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Optimization Design of Xinshuo Railway CTC System
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Liu Yan, Xie Shengzhi, Chen Yongming
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2024 Vol. 21 (1):
52-56.
DOI:10.3969/j.issn.1673-4440.2024.01.010
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Abstract (
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This paper provides a detailed discussion on the implementation and effect of CHN Energy dispatching system in Xinshuo Railway. The successful deployment of this system has achieved a deep integration of CTC system and the dispatch information system, allowing them to operate in a unified manner, and improving the efficiency of transportation organization. To ensure the stability and safety of the system, potential safety risks of CTC system are thoroughly analyzed, and improvement strategies and preventive measures are proposed. In the practical application of the system, the problems are analyzed, and specific solutions and suggestions are put forward. Finally, the future development of the system in Xinshuo Railway is prospected, including centralized control, integrated interlocking, and modernized communication, etc.
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Safety Analysis of Application Data Based on Beidou Short Messages
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Su Yaowei, Cao Xiaoyu, Shi Lizhu
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2024 Vol. 21 (1):
57-61.
DOI:10.3969/j.issn.1673-4440.2024.01.011
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Abstract (
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With the development of Beidou navigation satellite system, a large number of studies have been conducted on the application data transmission of Beidou short messages in areas with frequent geological disasters. How to analyze its safety has become the key to engineering application. In this paper, FMEA is used to provide an application data safety analysis method based on Beidou short messages. In order to ensure the correctness of data as the starting point, possible failure modes are analyzed, especially the risks caused by data changes. According to the failure mode, the corresponding risk mitigation measures are given to prevent or mitigate the risks. This will provide safety assistance for the wide application of Beidou short message in the future rail transit field to improve the overall safety of the system.
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Design of Data Parsing Tool for Record Board of Onboard ATO System
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Cao Xiaoyu
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2024 Vol. 21 (1):
62-68.
DOI:10.3969/j.issn.1673-4440.2024.01.012
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Abstract (
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In order to realize the reading, parsing and display of the train record data, and to facilitate the data analysis and the later maintenance of the train control system, a data parsing tool for the onboard automatic train operation (ATO) system record board is developed. Based on the in-depth analysis of the requirement specifications, the specific functions of the parsing tool are clarified, and the general design idea of the software and the detailed design process of each function are given. Finally, the usage of the software is introduced to provide guidance for subsequent users. Meanwhile, the software functions are tested and verified based on the measured data. The test results show that the developed parsing tool can fully realize the designed functions and is easy to operate.
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Research on Simulation Platform for Locomotive Assisted Driving System
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Liang Chunyan
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2024 Vol. 21 (1):
69-75,91.
DOI:10.3969/j.issn.1673-4440.2024.01.013
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Abstract (
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This paper introduces a research method for locomotive-assisted driving systems based on simulation platform. Locomotive-assisted driving systems have become a key technology in improving driving safety and efficiency. However, conducting system testing directly on actual locomotives may pose risks and incur high costs. Therefore, the development of a simulation platform suitable for locomotive-assisted driving systems is necessary. This paper provides an overview of existing simulation platforms, analyzes their advantages and limitations, and proposes a design scheme for a simulation platform based on virtual reality technology. This platform can simulate various driving scenarios and traffic conditions, allowing researchers to conduct accurate performance evaluations and functional tests of locomotive-assisted driving systems. Finally, the effectiveness and feasibility of the proposed simulation platform are validated through tests, providing strong support for the development of locomotive-assisted driving systems.
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Test Case Generation Method for Fully Automatic Operation System
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Liang Junhai, Li Chunfeng, Wan Li, Yang Yifeng, Xue Yiming
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2024 Vol. 21 (1):
76-82.
DOI:10.3969/j.issn.1673-4440.2024.01.014
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Abstract (
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Aiming at the test requirements of specified path coverage of fully automatic operation (FAO) system test, this paper proposes an algorithm for automatic generation of test cases for FAO based on the modeling theory of timed automata to meet the specified path coverage and edge coverage. Firstly, the modeling theory of timed automata is studied, and the FAO timed automata model is established. Then, a modeling method to add marker variables to the d automata model is proposed to characterize the FAO test requirements of specified path coverage. Thirdly, combined with the test case generation mechanism of Yggdrasil, a test case generation method of FAO is proposed, which satisfies both the specified path coverage and edge coverage criteria of FAO. Finally, taking the mode conversion function of FAO as an example, the timed automata model is established and test cases are generated. The results show that the test cases cover 100 % of the test requirements specified by the tester and all the edges of the timed automata model, which can meet the test requirements of the specified path coverage of FAO.
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Discussion on Seasonal Regulation Scheme of Automatic Train Operation
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Zhang Fan
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2024 Vol. 21 (1):
87-91.
DOI:10.3969/j.issn.1673-4440.2024.01.016
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Automatic Train Operation (ATO) has been widely applied to the onboard signaling system of subway trains, which improves the operation efficiency of subway trains. The braking performance of the train has a greater impact on the precise stop controlled by ATO. The train braking performance, especially the air braking performance, may be unstable to a certain extent, and the response to ATO's braking command may have a large deviation. One of the more important factors is the influence of season and temperature. This paper explores the method of optimizing the seasonal deviation of train braking and adding the adaptive ability of ATO system. In combination with the braking performance change of a certain line, a separate braking control strategy group is made for each braking change period, and switch and adjust is conducted automatically in the corresponding time period (or other setting conditions), so that under different train braking performance, ATO system can achieve precise stopping at the platform and improve the efficiency of passengers getting on and off.
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Grading Protection Access Scheme and Implementation of Rail Transit LTE System
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Bai Xue
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2024 Vol. 21 (1):
92-97.
DOI:10.3969/j.issn.1673-4440.2024.01.017
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This paper studies the specific schemes and steps of adding three grades of protection to LTE system carrying signal services based on Xi'an Metro Line 14. Two feasible access schemes of grading protection are proposed according to the characteristics of Line 14, and the optimal grading protection access scheme is selected through network architecture and performance evaluation and comparison to ensure the security and stability of network transmission. At the same time, through the description of the relevant interface configuration and precautions of the grading protection system, the important steps in the process of adding grading protection to LTE system involving the safety of train operation are elaborated to ensure network security, provide important guarantee for traffic control of rail transit signaling system, and provide reference value for subsequent rail transit grading protection access.
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Application of Quality Control Circle in Train Control System Integration Project
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Shan Heling
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2024 Vol. 21 (1):
98-102,115.
DOI:10.3969/j.issn.1673-4440.2024.01.018
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Considering the necessity and importance of applying quality management in the integration project of high-speed railway train control system, this paper firstly makes systematic research on theories related to project quality management. On this basis, it makes a further analysis on the modes and methods of quality management (Quality Control Circle) by taking the successful experiences of quality management in the implementation process of Shanghai-Hangzhou high-speed railway train control system integration project as an example, hoping to provide a solution of quality management method suitable for integration project of high-speed railway train control system, so as to effectively guarantee the project quality, ensure the safety of high-speed railway transportation, and support the development of high-speed railway industry.
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Design and Implementation of Onboard Relay Life Test System
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Wang Xin, Zhao Xinghai, Yao Wang
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2024 Vol. 21 (1):
103-107.
DOI:10.3969/j.issn.1673-4440.2024.01.019
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In order to actually test whether the onboard relay can meet the requirements of the service life and improve the stability and reliability of the onboard relay products, an embedded onboard relay life test system is designed to test the mechanical and electrical life of the on-board relay. In terms of system structure, it is divided into two parts: the lower computer and the upper computer. Based on the embedded system, the lower computer completes the drive of the onboard relay and the construction of the peripheral logic circuit by way of the main control module, collects the contact state of the relay to be measured in the process of action and codes the fault information, and transmits the coded fault information to the upper computer through RS-232 communication. The upper computer is designed with C# programming language, and has the functions of storing, analyzing and displaying the coded fault information. Finally, the feasibility and practicability of the system in information acquisition, data communication and fault diagnosis are verified through system joint debugging.
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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
