城轨交通专业英语 Unit 20 Telecommunication System 通信系统

Part B Dialogue
David: Well, how does the communication process achieve?
Try to discuss
John : Every station has a machine room with a switch connecting control centre, in
Try to discuss
Part B Dialogue
(David and John are talking about telecommunication system in metro system.) Try to discuss
David：What are the main components for metro telecommunication system?
David: What is wireless system used for？.
John : As every car is a moving object，telecommunication lines are impossible.
Wireless communication is adopted.
charge of receiving and sending of train control signals.
David: What kind of telecommunication media is used?
John : It is advanced fiber. It has great shield performance, fast transmission speed and
good privacy.
屏蔽性能优越，传送速度快，注重保护隐私
David: It seems that it is a wonderful system.
Part B Dialogue
New Words and Expressions
telecommunication transmission wireless schedule official machine room switch fiber shield privacy
Part A Block Diagram
Simply understand the Structure of Metro telecommunication System
Try to think
Part A Block Diagram
1. What is the communication system used for? 2. Have you seen the communication system equipment in the subway? 3. Can you take a phone call in the subway？ 4. The role of control center is________________________ 5. The role of switches is____________________________ 6. The role of fibers is ______________________________
Unit 20 Telecommunication System
通信系统
You will be able to
remember some words about metro telecommunication
introduce the composition and profile of metro telecommunication system
在操作员无法直接观察到可能因机器意外操作 而有人员受伤的情况下，就会安装闭路电视系统。 例如，在地铁列车上，闭路电视摄像机可以让司机 在关闭门和启动列车之前确认是否有人靠近车门。
Part C Passage
Try to discuss
…Operators of an amusement park ride may use a CCTV system to observe that people are not endangered before starting the ride. Closed circuit television enables the person on duty at the control center and the stations to monitor the stations, station halls, platforms and the entering and leaving of trains. The system’ monitoring train doors enables the TO to see the opening and closing of the doors of his train.
传输系统
无线系统
公务通话系统
John : Transmission system, wireless system, public official telephone system, inner
站内、沿线通话系统
station and line-side telephone system and dispatch system. 调度系统
n. 电信，通信
Try to调度，计划表
adj. 公务上的，官方的
n. 机房
n. 交换机，开关
n. 光纤，纤维
n. 屏蔽
n. 私密性，保密性
Part C Passage
CCTV
Try to discuss
A CCTV system may be installed where an operator of a machine cannot directly observe people who may be injured by unexpected machine operation. For example, on a subway train, CCTV cameras may allow the operator to confirm that people are clear of doors before closing them and starting the train.