铁道供电专业英语 铁道信号Overview of railway signals 2-Railway special communication.pptx

《Professional Engliah for Railway Elecrical Power Supply》Railway special communicationCao zhongjiaGuangzhou Railway PolytechnicCatalogue1Characteristics of railway transportation2Railway communication systemCommon Communication Equipment3 is a Railway Locomotive？1-Characteristics of railway transportationWhat are the characteristics of railway transportation ?Strong mobilityHighly dispersed24/7Ignore weather changesComplex railway networkChinese railway system is a very complex system, how to manage it effectively is also an important issue. Currently, the Chinese railway system is under three-class management.1-Characteristics of railway transportationThree-class management of Chinese railway systemConsider the whole situation, train operation dispatching commandMinistry of Railways（铁道部）1-Characteristics of railway transportationCoordinate the relationship between superior and subordinateRailway Administration（铁路局）Grass-roots of railway transportation，”nerve ending”railway traffic command systemBase station and district（基层站段）Majors of railway systemBesides the Three-class management, the railway system can also be divide into 5 majors, which includes:Transportation 运输Locomotive 机务Track 工务Signal and communication 电务Vihicle 车辆Each major has its own independent Service Management System （业务管理系统）. Only by maintaining communication with each other at all times， then such a complicated structure can ensure the railway system operate normally . That s why we need a special Railway communication system.1-Characteristics of railway transportation Railway communication system refers to a special communication system that transmits various kinds of information quickly and accurately for railway traffic organization, train operations and railway business contacts.To ensure safety of this system，the railway system built a private comminication network, which is NOT connected to the public telegram network or telephone communication network. The equipment it uses are also spec