基于电力线载波通信的区间监测系统的研究

发布时间：2018-05-12 10:28

本文选题：区间信号监测系统 + 电力线载波通信　；参考：《西南交通大学》2017年硕士论文

【摘要】：我国铁路经过六次大提速,使得列车的行驶速度越来越快,运行间隔时间越来越短,增加了铁路的运输能力,对我国的国民经济的发展起到了巨大的促进作用。列车速度的提升对区间信号设备的依赖也越来越强。区间信号设备的正常运行变得尤为重要,但是鉴于当初设计系统时受资金和技术的影响,使得对于室外设备(诸如信号机和轨道电路)的监测太少。据统计目前信号设备的故障大多数发生在室外,而集中监测系统是在室内采集的信号,无法反映区间信号设备在室外的真实运用状态。当室外信号设备发生故障时,使得电务人员只能通过人工的方法查找故障,处理故障的时间较长,严重地影响了行车。基于此,本文提出了区间信号设备监测系统方案。监测系统由室外轨旁的监测单元和室内接口机组成。通过轨旁监测单元监测区间信号机点灯状态、区间信号机电缆侧和灯端侧的电流电压、区间轨道电路电缆侧和轨道侧的电流电压和发码状态,然后通过有线或者无线的方式将监测的信息传回室内接口机,室内接口机在室内将监测信息显示出来,并把信息上传给集中监测系统,集中监测系统完成对区间信号设备监测信息的检查和报警分析。综合考虑供电和通信线不需要重新布线,即直接使用既有的电缆的备用芯线作为数据传输和供电的通道,并且尽可能少用电缆芯线,减少现场的施工工作,因此,轨旁监测单元和室内接口机之间的通信方式为电力线载波通信。本文首先分析了电力线信道特性,通过国内外载波芯片的对比,选择了适合中国电力线信道的IT700载波芯片。然后详细设计了区间监测系统以及以IT700载波芯片为中心的电力线载波通信系统,最后通过搭建电力线载波通信系统的硬件电路,对电力线载波通信的传输距离和误码率进行了分析,试验表明以IT700载波芯片为中心设计的电力载波通信系统能保证区间信号监测系统采集的数据进行远距离可靠传输。
[Abstract]:After six times of raising the speed of the railway in our country, the speed of the train is faster and the interval between the trains is shorter and shorter, which increases the transportation capacity of the railway and plays a great role in promoting the development of the national economy of our country. The increase of train speed depends more and more on interval signal equipment. The normal operation of interval signal equipment becomes particularly important, but due to the influence of funds and technology when designing the system, the monitoring of outdoor equipment (such as signal generator and track circuit) is too little. According to statistics, most of the faults of signal equipment occur outside, but the centralized monitoring system is the signal collected indoors, which can not reflect the true operation state of the interval signal equipment outside. When the outdoor signal equipment breaks down, the electric operator can only find the fault by manual method, and the time to deal with the fault is longer, which seriously affects the driving. Based on this, this paper puts forward the scheme of interval signal equipment monitoring system. The monitoring system consists of an outdoor rail monitoring unit and an indoor interface machine. Through the track side monitoring unit to monitor the lighting state of the interval signal generator, the current voltage of the cable side and the lamp end side of the interval signal generator, the current voltage and the code state of the cable side and the track side of the interval track circuit, Then the monitoring information is transmitted back to the indoor interface machine by wired or wireless means. The indoor interface machine displays the monitoring information indoors and uploads the information to the centralized monitoring system. The centralized monitoring system completes the inspection and alarm analysis of the monitoring information of interval signal equipment. Considering that the power supply and communication lines do not need to be rewired, that is, the backup core wire of the existing cable is directly used as a channel for data transmission and power supply, and the cable core cable is used as little as possible to reduce the construction work in the field, therefore, The communication mode between the rail side monitoring unit and the indoor interface unit is power line carrier communication. Firstly, the characteristics of power line channel are analyzed, and the IT700 carrier chip suitable for Chinese power line channel is selected by comparing the domestic and foreign carrier chips. Then the interval monitoring system and the power line carrier communication system centered on IT700 carrier chip are designed in detail. Finally, the hardware circuit of the power line carrier communication system is built. The transmission distance and bit error rate of power line carrier communication are analyzed. The experimental results show that the power carrier communication system based on IT700 carrier chip can ensure the reliable transmission of the data collected by the interval signal monitoring system.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U284

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