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Optimization and Implementation of Train Control On-board System
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Lu Ruibing
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2023 Vol. 20 (11):
1-6.
DOI:10.3969/j.issn.1673-4440.2023.11.001
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Abstract (
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The core control module of CTCS3-300T train control on-board system adopts double sets of redundancy. However, in the train interface link, the system uses a single set of DX/DI interface unit, forms a single failure point, which is easy to cause adhesive failure. In order to solve the impact of a single set of DX/DI on the availability of the CTCS3-300T system, an optimized design scheme using redundant train interfaces is proposed, double redundant DX-TH modules are used instead of single DX/DI modules. This solution does not take up additional installation space and does not jeopardize the integrity of the installation space of other sub-modules of the existing CTCS3-300T. Reliability model analysis shows that the use of redundant DX-TH modules can effectively improve the reliability of the CTCS3-300T system.
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Influence of High-speed Wheel-rail Relations on Track Circuit Performance Under Multi-factor Conditions
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Zhang Chaofan, Liu Jun, Luo Handong, Jiang Xiaoge
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2023 Vol. 20 (11):
7-13,43.
DOI:10.3969/j.issn.1673-4440.2023.11.002
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Abstract (
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Track circuit is an important part of railway signal used for monitoring of railway vehicle occupancy and communication, which is of great significance to traffic safety. The influence of wheel-rail resistance on the performance of track circuits is an important direction. In this paper, a series of wheel-rail resistance measurement experiments based on rolling test bench are designed to study the influence of various common interference factors such as measurement parameters, wheel weight, running speed and track state on wheel-rail resistance. When the voltage increases, the axle load increases, the rust is less, the wheel tread roughness is higher, and the oil pollution between the wheel and rail is reduced, the wheel-rail resistance decreases and the shunting effect becomes better.
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Design and Implementation of High Precision Track Electronic Map Generation System
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Sun Zhe, Wang Song, Zhao Jia
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2023 Vol. 20 (11):
14-19.
DOI:10.3969/j.issn.1673-4440.2023.11.003
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Abstract (
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Aiming at the problems of large amount of track electronic map data, heavy workload of manual compilation and low accuracy, this paper proposes a high-precision track electronic map source data description method and data structure. A high-precision track electronic map generation system suitable for medium and low traffic volume rail transit is designed and implemented. The system can automatically complete data processing and data verification in simulation and actual scenarios, and finally generate electronic map data file. Through the establishment of mobile positioning data acquisition platform, the system has been applied in Wuhu rail transit line 1 and 2. The application results show that the high-precision track electronic map generated by the system can accurately and effectively realize the functions of vehicle position matching and graphical display.
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Development and Application of Intelligent Simulation Panel for Railway Signal
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Wang Dingming
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2023 Vol. 20 (11):
20-25.
DOI:10.3969/j.issn.1673-4440.2023.11.004
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Abstract (
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On the basis of in-depth investigation of the problems existing in the signal simulation panel in the field signal construction, this paper analyzes the typical problems encountered in the use of the signal simulation panel in the training base, and puts forward the solution of "software + hardware" intelligent simulation panel for railway signal to solve the common problems such as poor versality, simple function and cannot be reused. The software is developed to realize free modification, drawing and configuration of station and yard plan; the hardware of simulation outdoor signal equipment is developed and expansion slots are reserved to improve the versatility of the equipment. Through application verification, it can meet the needs of the field signal construction simulation test or training base to replace outdoor station and yard signal equipment to carry out indoor interlocking practical training teaching, and has certain promotion value.
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Research on Rail Structure Health Monitoring Technology Based on Ultrasonic Guided Wave in Variable Temperature Environment
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Wang Pengyue, Zhu Liang, Tan Shulin, Jiang Zenggang, Kang Jian
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2023 Vol. 20 (11):
26-33.
DOI:10.3969/j.issn.1673-4440.2023.11.005
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Abstract (
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When using ultrasonic guided waves to monitor the health of rail structure, the temperature change will lead to the change of the guided wave characteristics of the rail, which will affect the accuracy of the monitoring results. This paper mainly analyzes the influence of temperature on guided wave velocity of rail, and proposes to use the cubic spline interpolation to stretch the signal in time domain to realize the compensation of the guided wave velocity. The normalized energy mean square error is used as the criterion for selecting the best tensile factor and the criterion for judging the damage of the rail, which avoids the influence of the amplitude change of the guided wave signal on the monitoring results, and the effectiveness of the algorithm is verified by processing the experimental data. In addition, a rail sawing demonstration test was carried out on the heavy-haul line of Hohhot South Station. It provides a technical basis for the health monitoring of rail structure in variable temperature environment.
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Research on Train Control System Processing Scheme of Long-short Route in Station
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Yang Tao, Huang Jia
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2023 Vol. 20 (11):
34-38.
DOI:10.3969/j.issn.1673-4440.2023.11.006
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Taking the reconstruction of existing high-speed railway stations and overseas engineering construction as the starting point, this paper introduces the definition and application principles of long-short route, analyzes the safe operation scenarios of double parking and multi-track departure and reception based on the long-short route in the station, and puts forward the long- short route processing scheme of the train control system from three aspects: the configuration of long-short route in the station, the status of long-short route and the processing of long-short route. The effect analysis of the safe operation scenario according to the long-short route processing scheme in the station effectively proves that the scheme has important application value.
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Analysis of Transmit Power Control of Balise Transmission Module
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Wang Li, Yu Yuanyuan
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2023 Vol. 20 (11):
39-43.
DOI:10.3969/j.issn.1673-4440.2023.11.007
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The onboard balise transmission module generates a 27.095 MHz RF carrier wave and transmits it through CAU to the trackside balise. The study and analysis of the control implementation circuit of RF power switch, value and mode of the balise transmission module can deepen the understanding of the design principle of BTM transmission unit and help locate the fault point of insufficient output power, and promote the quality improvement and performance optimization of the balise transmission module.
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Design and Research on Architecture of Big Data Analytics Platform in Heavy-haul Railway Transportation
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Song Zongying, Wang Wenbin, Liu Ziyang, Zhou Jin, Liu Yongzhuang
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2023 Vol. 20 (11):
44-49.
DOI:10.3969/j.issn.1673-4440.2023.11.008
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Abstract (
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In order to solve the problem of insufficient analytical capabilities, application depth, and data innovation arising from the large amount of business data accumulated in the organization of heavy-haul railway transportation, and promote the application of big data technology in the field of heavy haul railway transportation, this paper proposes a design solution for a big data analytics platform in the field of heavy-haul railway transportation. Based on an analysis of the characteristics of heavy-haul railways, a framework for the platform is presented, which utilizes a hybrid architecture combining Hadoop and MPP (Massively Parallel Processing). The study also designs the application and technical architecture of the big data platform, and discusses the key technologies and business applications of the platform. Currently, the construction and operation of the heavy-haul railway big data analytics platform based on this design solution have been implemented.
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Analysis of Green Operation of Railway 5G-R Base Station
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Zhang Yubai, Sun Qimin, Zhang Chi
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2023 Vol. 20 (11):
50-53,59.
DOI:10.3969/j.issn.1673-4440.2023.11.009
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In order to actively respond to the national dual carbon policy and promote the sustainable development of railway wireless communication system, this paper analyzes the green operation strategy of railway 5G-R based on the green development of 5G base stations in the public network and the application characteristics of railway wireless communication services. The green operation of railway 5G-R is analyzed mainly from three aspects: base station energy-saving control, base station new energy technology, and integrated application of intelligent air conditioning control technology and fresh air energy saving technology in base station machine room, and the main research contents are proposed. It is hoped that it will have certain reference and guiding significance for the research on green operation of railway 5G-R base stations.
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Research on Three-level Deployment of Intelligent Integrated Dispatching Information System
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Wang Yulong
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2023 Vol. 20 (11):
54-59.
DOI:10.3969/j.issn.1673-4440.2023.11.010
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The intelligent integrated dispatching information system realize the unified management of various transportation-related resources such as trains, locomotives, vehicles, cargo, construction, and maintenance, and help railway transportation enterprises make comprehensive transportation decisions. Aiming at the application requirements of the intelligent integrated dispatching information system, this paper studies its three-level deployment structure, analyzes the required network technologies from difficulties in actual deployment, and proposes a reliable networking scheme to meet the requirements for operating stably in all types of scenarios.
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Case Analysis of Interference Investigation of GSM-R System in Xuyong-Bijie Railway
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Wei Lei
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2023 Vol. 20 (11):
60-65.
DOI:10.3969/j.issn.1673-4440.2023.11.011
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Abstract (
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By analyzing uplink interference caused by China Telecom's CDMA system to the GSM-R network , downlink interference caused by China Mobile's GSM system to the GSM-R network and other typical cases in the construction process of GSM-R system of Xuyong-Bijie Railway, this paper discusses the key problems of external network interference detection, cause analysis, field test and rectification measures in the construction and maintenance of GSM-R network, and puts forward suggestions on the technical requirements of normalized interference monitoring in key areas of GSM-R section, which provides reference for engineering practice.
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Optimization of Security Check Configuration for Urban Rail Transit Based on Operational Status Evaluation
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Cao Kai, Zhang Ning
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2023 Vol. 20 (11):
66-73.
DOI:10.3969/j.issn.1673-4440.2023.11.012
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Abstract (
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The service capacity of urban rail transit stations during peak hours is facing great challenges, and security checks, as an important link for inbound passengers, have become a pain point that restricts the inbound efficiency. Based on this, this paper constructs an evaluation system for the operational status of security checks, utilizes a simulation model of inbound passenger flow, and optimizes the configuration of station security checks in combination with differentiated security check modes, providing reference for the formulation of security check optimization plans for operators. The results indicate that the current operational status of security check of the station is poor, making it difficult to meet the inbound demand of passengers during peak hours. The optimization scheme based on differentiated security check mode can improve the inbound efficiency of passengers during peak hours by at least 14.0%, and significant improvements have been made in key indicator parameters that reflect the operational status of security check, such as maximum queue length, facility capacity matching degree, and inbound density index.
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Discussion on New Mode of Passenger Service of Urban Rail Transit Stations
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Li Jian, Mao Xinde, Liu Yingjie, Huang Jian
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2023 Vol. 20 (11):
74-78.
DOI:10.3969/j.issn.1673-4440.2023.11.013
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Based on the service subject of quality travel in the new era, this paper summarizes the characteristics of three stages of station passenger service development, analyzes the short comings of the existing station passenger service system in the last meter of service execution. Aiming at ensuring the quality of passengers in the service execution, it makes full use of intelligent systems and intelligent equipment, and proposes a station passenger service solution and the system composition, which integrates online and offline and coordinates station hall and platform. And the business logic changes and application benefits brought by the passenger service system under the new model are briefly analyzed.
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Research on Section Comprehensive Intelligent Detection Based on Extended Monitoring System of OCS
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Yu Qiubo, Han Chaojian, Zhang Xiaofei, Wang Baoshun, Chen Zhen, Ni Guozheng
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2023 Vol. 20 (11):
79-84.
DOI:10.3969/j.issn.1673-4440.2023.11.014
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In response to the current demand for intelligent detection in rail transit, we need to strengthen the support role of technological innovation in rail transit, and apply new technologies to the field of subway construction and operation in a forward-looking manner to improve operation and maintenance capabilities. In view of the limited methods of current section condition monitoring and the low efficiency and poor accuracy of traditional manual measurement methods, this paper elaborates in detail on the use of different intelligent detection methods to solve the following problems: the hidden defects of ring network cables are difficult to detect; the field strength of the wireless communication system in subway tunnels cannot be continuously measured; the impact of foreign object intrusion in subway tunnels is significant. This study can improve measurement accuracy and efficiency, detect and solve abnormal problems in advance, and improve the safety of section equipment.
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Splitting and Transformation Scheme of Signaling System for Y-shaped Line in Urban Rail Transit
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Pei Liyuan
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2023 Vol. 20 (11):
85-91.
DOI:10.3969/j.issn.1673-4440.2023.11.015
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Hangzhou Metro Line 1 is a Y-shaped line, it’s Linping branch line is planned to be splitted off and placed under the control of metro line 9. In order to ensure the splitting and transformation of Linping branch line signaling system safely and efficiently, this paper studies and analyzes the splitting and transformation objectives, switching schemes and key technologies, and creatively puts forward the old and new systems switching scheme with the switching cabinet and the junction box, which provides ideas for the subsequent planned splitting and transformation of rail transit lines, and has certain reference value.
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Vehicle-ground Wireless Renovation Project of Signaling System for Chengdu Metro Line 1
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Zhang Shiming, Zhang Jianming, Xu Yu
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2023 Vol. 20 (11):
92-96.
DOI:10.3969/j.issn.1673-4440.2023.11.016
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LTE-M vehicle-ground wireless system based on 1.8 GHz dedicated frequency band is superior to WLAN in terms of security, delay, communication quality, coverage, adaptability to higher speed and interconnection. It has become the standard configuration for carrying CBTC service of signaling system. This paper analyzes the key elements in different stages of LTE-M replacing WLAN without affecting the operation of existing lines, and puts forward the vehicle-ground wireless system renovation scheme of urban rail transit signaling system, which provides reference for similar projects.
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Research on Harmonic Interference Around BTM Antenna of CR300BF EMU
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Liu Jiao, Xia Pengliang
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2023 Vol. 20 (11):
102-105,111.
DOI:10.3969/j.issn.1673-4440.2023.11.018
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The reason of the interference problem of BTM system is that it is greatly affected by the external environment and car body working conditions in the process of failure, and it is difficult to find after the fault occurs, and the means are limited, so it is impossible to formulate effective rectification measures. Through analyzing the new CR300BF EMU BTM system fault phenomenon, this paper mainly studies the fault investigation, determination, treatment and summary, finally finds out the cause of the fault after many processing and research, and formulates effective measures, which provides ideas and methods for the acceptance, maintenance and fault treatment of the onboard train control equipment of similar models in the future.
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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