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Research on Calculation for Passing Through Neutral Sections in Trian Control by Applying Vehicle-Ground Integration Approach
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Fang Mingliang, Wei Xuchu, Yan Zhiwei
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2023 Vol. 20 (1):
1-6.
DOI:10.3969/j.issn.1673-4440.2023.01.001
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Abstract (
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Through a case study of introducing Zhangjiajie-Jishou-Huaihua High-speed Railway into Huaihua Hub, this paper analyzes the data of the passing over of neutral sections for different vehicle models with different onboard equipment in various scenarios, in order to solve the problems that emerged in actual scenarios in the dynamic testing in the hub in the process of joint commissioning and testing. Compared with the traditional approach, which only takes the ground parameters into account when performing simulation calculation for the passing over of neutral sections, this paper puts forward a new calculation method that integrates the vehicle and ground parameters, and proposes a formula for calculating key parameters, which aim to provide necessary reference for the engineering designs of subsequent projects.
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Research on Optimization of Engineering Design Standards of Snow Melting Devices for Railway Turnouts
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Ning Yongmei, Yan Hongwei
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2023 Vol. 20 (1):
7-13.
DOI:10.3969/j.issn.1673-4440.2023.01.002
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Abstract (
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Because it snows frequently in winter in many places in China, it is very important to remove the snow from the turnouts in time. The installation of snow melting devices for turnouts can effectively remove the snow from the key parts of the turnouts, and improve the efficiency of railway transportation. However, after years of use, more and more shortcomings of such devices have been exposed. In this paper, in order to address the current problems, including the vast electricity load of such devices, the high engineering costs and the fact that it starts to snow in more areas in southern China, large, medium and small railway stations in different regions are chosen as examples to study the engineering design schemes and to optimize the design standards of such devices. This paper has important significance for guiding engineering design in this field, and provides technical support for improving related standards and specifications.
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Research and Implementation of Image Detection System for EMU Pantograph Status
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Zhou Yan
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2023 Vol. 20 (1):
14-19.
DOI:10.3969/j.issn.1673-4440.2023.01.003
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A pantograph is installed on the roof of an EMU, and the installation status of the key components of the pantograph and the running status of its carbon contact strips are directly related to the dynamic operation safety of the EMU. At present, image detection of EMU roofs is undertaken by line scan cameras in most cases, and the major shortcomings of this method are that the images do not create strong 3D effects and there is distortion in the line scan images. Therefore, this paper adopts a novel trigger mechanism based on deep learning: high-definition area scan cameras are used to capture the images of pantographs in all directions, which can present the panoramic images of the pantographs more accurately, and facilitate intelligent image recognition.
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Fault Detection Method in Redundant Design with Two Pressure Sensors
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Ding Xu
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2023 Vol. 20 (1):
20-23,39.
DOI:10.3969/j.issn.1673-4440.2023.01.004
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In this paper, a method of dividing the pressure chambers supported by the pressure detection control logic is proposed to solve the problem that the specific malfunctioning part cannot be determined when the data are inconsistent from a train designed with dual pressure-sensor redundancy. Compared with the existing fault diagnosis methods in redundant design, the proposed method can further determine the specific malfunctioning part after a fault, and can continue to be used on the premise of meeting the requirements for confidence levels. This method can be applied to train tail equipment to further improve equipment availability on the premise of improving the accuracy of fault diagnosis.
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Method for Implementing Safety Communication Protocol Based on Open Network
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Yin Qin, Zhang Liwei
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2023 Vol. 20 (1):
24-27,45.
DOI:10.3969/j.issn.1673-4440.2023.01.005
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In an open network transmission environment, communication between security devices requires a complete data communication protocol to ensure the security of application data. This paper proposes an optimization scheme for secure communication protocols, which uses SM4 algorithm to encrypt the data transmitted in the RSSP-I secure communication protocol, and optimizes the layered structure, message structure and communication interaction process of the secure communication protocols in an open network environment. Through analysis and demonstration, this paper shows that this method for implementing secure communication protocols provides effective defense and protective technical measures in response to all possible threats existing in the open transmission system, meeting the security requirements for data transmission between security devices.
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Application of Train Control Safety Information Supervision in Centralized Signaling Monitoring System
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Zhao Haosen, Hu Yichao
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2023 Vol. 20 (1):
28-32.
DOI:10.3969/j.issn.1673-4440.2023.01.006
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Combined with the actual needs of train control safety information supervision, this paper introduces the hierarchical structure of train control safety information supervision and its main functions, such as safety information supervision and analysis, early warning management, relevant safety information display and so on. At the same time, key technical methods such as dynamic time warping and data processing fusion are briefly described. The application scenarios and effects of train control safety information supervision are displayed. And based on the characteristics of the existing technology, the application and development direction of train control safety information supervision in Centralized Signalling Monitoring System are prospected.
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Transmission Delay Control Method of Railway Communication Networks Based on Neural Network
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Dong Yuqi
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2023 Vol. 20 (1):
33-39.
DOI:10.3969/j.issn.1673-4440.2023.01.007
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A transmission delay control method of railway communication networks based on a neural network is studied. This study uses the communication network delay data captured by TCN network analyzer to serve as data samples. With the data samples as input, the prediction of transmission delays of railway communication networks is realized by using the neural network. With the prediction results as the output, combined with PID, the delay control quantity and delay compensation quantity are obtained to realize the transmission delay control of railway communication networks. The results show that the new control method in this paper reduces the delay time and increases the communication link rate as compared with the control method based on power control protocol and the control method based on delay compensation, which proves the effectiveness of this new method.
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Analysis and Optimization of CTCS-3 Degradation Faults Caused by Abnormal Occupancy in GSM-R Line Crossing Area
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Zhao Yinlong
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2023 Vol. 20 (1):
40-45.
DOI:10.3969/j.issn.1673-4440.2023.01.008
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Down-direction trains on Hefei-Fuzhou High-speed Railway experienced CTCS-3 communication timeout for many times which resulted in degradation. A step-by-step investigation reveals that such faults occurred in the crossing area of the lines. The monitoring data of CTCS-3 interfaces and the test data of inspection trains regarding the degraded trains are checked, and an in-depth analysis is conducted based on the cell handover principle of GSM-R system. It is determined that the faults are caused by abnormal occupancy of a base station in idle mode that does not belong to Hefei-Fuzhou High-speed Railway. In view of this situation, the transmitting power and the angles of antenna feed lines of the base stations in the crossing area of the railway lines are adjusted. The test results show that after network optimization, the value of the electrical level of the base station of Hefei-Fuzhou High-speed Railway in this area is significantly higher than that of adjacent lines, which can effectively avoid the occurrence of degradation failures caused by abnormal occupancy.
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Research and Application of Railway Bearer Network Tunneling Technology Based on SRv6
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Gao Yuan, Qiu Ping
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2023 Vol. 20 (1):
46-51,60.
DOI:10.3969/j.issn.1673-4440.2023.01.009
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In order to better meet the new application requirements of smart railways such as next-generation railway mobile communication 5G-R network, data center high-speed interconnection and cloud network convergence, this paper studies the tunneling technology facing the railway bearer network, focuses on the railway application scenarios, takes into consideration the characteristics and advantages of SRv6 technology to put forward the railway bearer scenario deployment schemes based on SRv6-TE Policy tunnel and SRv6-BE tunnel, verifies and analyzes these schemes, and makes suggestions on SRv6 application deployment schemes of railway bearer network.
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Optimization of Information Interaction Modes Between Railway Bureaus in TDCS/CTC System
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Xu Hua, Ren Maocheng
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2023 Vol. 20 (1):
56-60.
DOI:10.3969/j.issn.1673-4440.2023.01.011
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During the information exchange between Railway Bureaus based on the MQ component in the TDCS/CTC System, a single-network fault or a single-point MQ queue interruption may cause inconsistent display of information on stations and yards between Bureaus and abnormal exchange of inter-Bureau dispatching commands. By using TCP/IP to replace MQ and optimize the existing single-point MQ connection, this paper carries out research on the optimization of inter-Bureau interaction modes to effectively improve the stability of inter-Bureau interaction information.
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Scheme for Switching Between CTCS-2 and CBTC Train Control Systems for Suburban Railways
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Quan Hongyu, Zhang Minhui
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2023 Vol. 20 (1):
61-66,94.
DOI:10.3969/j.issn.1673-4440.2023.01.012
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Aiming at meeting the requirements for cross-standard interoperation between CTCS-2 and CBTC train control systems of suburban railways, the characteristics of CTCS-2 and CBTC and the scenarios of switching between these systems are analyzed on the basis of the existing train control system, the system interface requirements, switching procedures and functional requirements for such switching are proposed, and then the application scheme of switching between the systems is discussed, in order to meet the requirements for suburban railway interoperation and resource sharing. The research results provide reference for the development of technical standards of train control systems for suburban railways and the development of related train control system equipment.
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Photoelectric Hybrid Access System for Railway Heterogeneous Monitoring Data
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Xu Yuming, Shi Xianming, Liu Liping, Hu Zuhan, Huang Zhijie, Luo Bin
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2023 Vol. 20 (1):
67-71,82.
DOI:10.3969/j.issn.1673-4440.2023.01.013
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In order to give full play to the role of industrial bus in the acquisition and transmission of railway bottom sensing and monitoring data, a photoelectric hybrid multi-port railway heterogeneous sensing and monitoring data access system is proposed in this paper. Multi-port switching is realized by integrating an automatic control switch in the system to ensure that only the same type of monitoring equipment from the same manufacturer is connected to the bus at the same time, so as to avoid protocol conflicts. At the same time, an optical port is added in the system to transmit long-distance monitoring data by optical fiber. Based on the software and hardware design, the prototype is developed, and the data communication function is preliminarily verified. The system is expected to be applied in the efficient collection of bottom multi-service basic data of intelligent operation and maintenance management system.
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Research on Ticketing Integration of Rail Transit in Metropolitan Area
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Liang Jun, Fu Baoming, Zhang Ning, He Tiejun
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2023 Vol. 20 (1):
72-76.
DOI:10.3969/j.issn.1673-4440.2023.01.014
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Firstly, this paper introduces the development patterns of rail transit in the metropolitan areas in China and analyzes the concept of ticketing integration. Then, it analyzes in detail the contents of ticketing system integration from the aspects of ticketing policies, ticket cards, fare collection, sorting and operation services involved in system operation. The analysis and discussion of such contents and schemes provide an important reference for the development of ticketing systems in metropolitan areas, which is of great significance to the integrated development of rail transit in metropolitan areas.
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Exploration and Analysis of Technical Integration of Electromechanical Devices and General Contracting of Signaling Systems
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Zhong Xiaohui
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2023 Vol. 20 (1):
77-82.
DOI:10.3969/j.issn.1673-4440.2023.01.015
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This paper is based on the requirements for and the experience gained from the tendering for urban rail transit signaling systems, the experience from the implementation of fully automatic operation projects, and research on industry development trends. This paper focuses on signaling systems and their integration with electromechanical devices of multiple professional fields from the perspective of functional requirements. Based on the requirements in Outline of Intelligent Urban Rail Development of Urban Rail Transit in China, this paper provides an analysis from the perspective of the technical integration of the systems of multi-professional electromechanical devices and from the perspective of an integrator of signaling systems as the general contractor in a tendering process. This paper explores for the direction of the development of integrated and intelligent urban rail transit in the future. Finally, with the development of new technologies such as 5G communication, artificial intelligence, cloud platforms and big data algorithms, there is still much potential for integrated and intelligent signaling systems that integrate multi-professional electromechanical devices.
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Design and Implementation of Tram Train Tracking Method
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Jing Shunli
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2023 Vol. 20 (1):
88-94.
DOI:10.3969/j.issn.1673-4440.2023.01.017
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This paper introduces the design and implementation of a tram tracking method in the tram operation dispatching system. This method combines the on-board positions, status reports and track occupation information of the controllers of railway switches, so that the operation dispatching system can support the tracking of both communication and non-communication trams in sections with or without switches in the tram operation environment, and meet the requirements of the tram operation dispatching system. This paper discusses the train tracking characteristics of subways and trams, and puts forward a tram tracking method in the tram operation dispatching system, which is introduced in detail from the major aspects, such as system differences, system function principle, system design and so on.
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Modification and Verification of Lighting Circuits of Up-direction Starting Signals at Jiaxing Railway Station
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Dou Lei
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2023 Vol. 20 (1):
99-104.
DOI:10.3969/j.issn.1673-4440.2023.01.019
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In order to solve the problem that the standard lighting circuits of the up-direction starting signals of Jiaxing railway station cannot meet the demands of the site, a modification plan of the lighting circuits is proposed according to the site requirements, and the modification plan is verified. Firstly, according to site requirements, this paper analyzes the shortcomings of the standard lighting circuits as mentioned above; secondly, the circuit modification plan is proposed; then, the circuit function logic in the modified plan is verified in different scenarios one by one; finally, the key points of the modified design are summarized. The results show that the modified circuits comply with the “fail-safe” principle and can effectively meet the actual demands of Jiaxing railway station.
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Analysis and Solutions of VDX Time Sequence Problems of CTCS3-300T Onboard Equipment
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Chang Bin
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2023 Vol. 20 (1):
105-109.
DOI:10.3969/j.issn.1673-4440.2023.01.020
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Vital Digital Input/Output units (VDX) are very important in a CTCS3-300T onboard train control ATP system. When a train runs, the VDX time sequence problems will directly lead to the stopping of the train due to failure. In order to ensure the normal operation of 300T ATP systems and improve the efficiency of operation and maintenance, the causes of VDX time sequence problems are analyzed, the solutions are discussed with consideration of the functions and principle of VDX units. And the scheme for dealing with VDX time sequence problem is obtained.
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Comparative Analysis of Full-electronic Interlocking and Computer Interlocking Systems
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Mao Fang
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2023 Vol. 20 (1):
110-114.
DOI:10.3969/j.issn.1673-4440.2023.01.021
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Based on the development history of the interlocking systems, this paper analyzes the system architectures of full-electronic interlocking and computer interlocking, compares and analyzes the application characteristics of the two interlocking systems according to the current status of urban rail transit interlocking systems, and explains the advantages of full-electronic interlocking systems, such as small occupied space, short construction period, simple interface wiring and convenient maintenance, which enable such systems to overcome the problems existing in computer interlocking systems. Finally, this paper examines the current problems of full-electronic interlocking systems, with an outlook for their application in the future markets.
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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