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1) closed-circuit signaling
闭路信号设备
2) railway signal equipment
铁路信号设备
1.
Analyzes the hazard to the low voltage equipment by the direct lightning, inductive lightning and lightning surge, puts forward the proposals on how to protect the railway signal equipment from damage of lightning.
分析了直击雷、感应雷、雷电浪涌等对弱电设备的危害,综合当今各种防雷技术,对铁路信号设备防雷措施提出了建议。
2.
This paper introduces the application of railway signal equipments and the teaching of railway signal in higher vocationalcolleges at present, and the opportunities for the development of vocational railway technological colleges.
本文介绍了铁路信号设备的应用和发展以及高职院校铁路信号专业的教学现状,由此发现并讨论了实际需求与教学的差距;在此基础上,提出《铁路信号新技术》课程教学建议:重在教材的快速更新,而关键又在于信号专业师资的培养,其前提都是要与铁路部门建立良好的校企合作关系。
3.
With the rapid development of railway transportation, the schedule maintenance mode of railway signal equipment is turning into advanced condition based maintenance mode.
随着铁路运输的发展,铁路信号设备的维修体制逐渐由以计划维修模式为主转变为以状态维修模式为主。
3) railway signal device
铁路信号设备
1.
To facilitate management of the personnel responsible for the patrolling railway signal devices,a new patrol system was devised by incorporating GPS and RFID technologies.
为便于对铁路信号设备巡检人员的管理,结合GPS(卫星定位系统)和RFID(射频识别)技术,设计了一种铁路信号设备巡检系统。
2.
Based on the project "Railway signal device troubleshooting decision support system", there are three modules in this thesis:Firstly, I make analysis on the mechanism and work processes of railway signal device failures maintenance, design and realized the railway signal device failures maintenance expert system, providing solutions and decision support for the signal device failures.
铁路是我国重要的运输命脉,而铁路信号设备则是指挥列车运行,提高运输作业管理效率的重要设施。
4) Signal equipment
信号设备
1.
Discussion on integrated test of electric features of signal equipment;
浅谈信号设备电气特性的集中测试
2.
This paper expounds the role of station s access supervision system played when there is the trouble with station s signal equipment, and introduces the components of the system and the design of its software and hardware.
阐述了车站进路监督系统在火车站信号设备出现故障时所发挥的作用,介绍了该系统的组成及其软、硬件设计。
3.
Aimed at Chinese railway signal equipments fault characteristics and the fault diagnose method which was adoptedat present, the general architecture of Railway Signal Fault Diagnose Expert System was analyzed, the idea that using faultdiagnose method in different level to set up and develop Railway Signal Fault Diagnose Expert System was proposed.
针对我国铁路信号设备故障的特点及目前普遍采用的故障诊断方法,对铁路信号故障诊断专家系统的总体结构进行了设计分析,提出了应用分层次的故障诊断方法,建立和开发铁路信号故障诊断专家系统思路,并对该系统的功能、特点及安全可靠性进行了探讨分析。
5) signals equipment
信号设备
1.
According to the characteristics of thunder and lightning and the harms that may be done by thunder & lightning to railway signals equipment,this paper analyses and illustrates the types of lightning proof of railway signals equipment,and puts forward special anti-thunder protection actions in terms of the ways that the railway signals equipments may be damaged by thunder and lightning.
根据雷电及其特征,以及雷电对铁路信号设备的危害,分析了铁路防雷信号设备的种类,并针对雷电对铁路信号设备侵袭的途径,给出了专门的防雷措施。
6) signal device
信号设备
1.
The traditional monitoring system for railway signal device has many shortcomings compared with the distributed virtual instrument.
针对目前铁路信号设备监测系统的缺点及分布式虚拟仪器在测试系统中的优越性,本文提出了一种基于以太网分布式虚拟仪器的信号设备测试系统,从网络基础、通信结构、硬件和软件系统等方面探讨其实现方法。
2.
In view of low-efficiency and great error of railway signal device test at present, a kind of anti-interference mixed automatic testing system is designed, which is based on advanced GPIB and PXI bus technology in the instrument field and adopts with LabVIEW, graphic development environment for the virtual instrument.
针对目前铁路信号设备抗干扰测试效率低、误差大的缺点,本文基于仪器领域中先进的GPIB和PXI总线技术,采用LabVIEW的虚拟仪器图形开发环境,设计了一种抗干扰混合自动测试系统,给出了系统结构和原理,既可充分利用现有实验室的仪器资源,又有效地缩短了测试时间,避免了人工测试带来的误差。
补充资料:闭路电视监控系统设备的选择与安装
电视监控系统由摄像机、传输分配、控制、图像的处理与显示四部分组成。该系统是双向的多路传输系统,既要向接收端传输视频信号,又要向摄像机传送控制信号和电源。 1 控制方式及控制信号的传输 电视监控系统应具有对电动云台、电动变焦镜头、防护罩和电源的控制功能。控制中心与受控中心间的距离及受控设备的多少决定电视监控系统的控制方式。 (1)当摄像机数量少,控制距离不超过500m时,可采用直接控制方式,用多芯电缆传输控制信号。这种方式控制线数量多,施工量大。 (2)当摄像机数量少,控制项目较少,控制距离在1000m以内时,可采用间接控制方式。这种方式控制线数量也较多。 (3)由于PC机技术的极大进步,现已将数字技术广泛应用于传统的模拟电视监控领域,这就是数据编码微机控制方式。这种方式采用串行码传输控制信号,系统控制线只需两根,适用于大中型系统的控制及长距离传输,还可以用软件将监控与报警系统兼容起来。 (4)当控制距离在300~500m时,来自摄像机的视频信号及来自控制器端的控制信号可共用一条同轴电缆,这就是同轴视控方式。这种方式虽能节省控制线,但目前此类设备较昂贵,设计时要综合考虑。 2 视频信号的分配及传输 2.1 视频信号的分配 当监视器不超过5台且就近设置时,可采用桥接分配方式;当一路视频信号要传送到相距较远的多个监视器时,应采用视频分配器方式。 2.2 视频信号的传输 视频信号传输线有同轴电缆(不平衡电缆)、平衡对称电缆(电话电缆)、光缆。平衡对称电缆和光缆一般用于长距离传输,对于宾馆酒店等建筑一般采用同轴电缆传输视频基带信号的传输方式。当采用75-5同轴电缆时,一般传输距离在300m时,应考虑使用电缆补偿器。如采用75-9同轴电缆时,摄像机和监视器间的距离在500m以内可不加电缆补偿器。 3 摄像机及附属设备的选择 电视监控用摄像机按摄像器件划分为电真空摄像器件(即摄像管)摄像机和固体摄像器件(CCD器件、MOS器件)摄像机两大类。电真空摄像管开发早、种类多,而目前已被一般电视监控系统选用的固体摄像管所代替,后者是近年发展起来的一类新型摄像器件,它的优点是:惰性小、灵敏度高、抗强光照射、几何失真小、均匀性好;抗冲振,没有微音效应;小而轻、寿命长。电视监控用摄像机目前正朝着小型化、轻量化、廉价化,并提高图像质量、增加操作功能的方向发展。 3.1 摄像机防护罩的选择
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条
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