编组站测速雷达数字化传输研究

发布时间：2018-06-15 13:04

本文选题：数字化传输 + STM32F105　；参考：《华东交通大学》2017年硕士论文

【摘要】：编组站在现代铁路中扮演的角色尤为重要,主要负责货运车辆的集散和解编。测速雷达是编组站自动化控制系统中的重要测量设备,传统的测速雷达输出是与溜放车辆速度成正比的方波信号,并通过电缆直接引入室内测速计算机。随着编组站周边线路及编尾的电气化改造,编尾有电力机车启动时,瞬间电流较大,部分电流通过大地回流,引起回流方向地电位变化,对雷达设备产生干扰。其中电磁干扰较为严重,其传播方式是以空间场的形式向外传播,会给测速雷达以及信号的自检通道产生较大的干扰。导致测速不准或测速雷达不能正常工作。在此背景下本文提出利用数字化传输方式来替代传统的模拟信号直接传输,本文研究重点为多普勒雷达信号的数字化传输。下位机底层总线选用抗干扰能力较强的CAN总线。利用CAN总线技术将编组站几十台测速雷达组成一个高可靠的测速网络,拓扑结构采取双CAN总线型。针对编组站测速雷达的位置以及网络系统对可靠性和安全性的要求,设计了相关的CAN应用层协议,且符合EN50159的规范,室外驼峰测速主机芯片采用性能较高的STM32F105RBT6微处理器,拥有两个CAN通路。并利用KEIL5编写相关的下位机程序。下位机主要负责数据采集和转换,上位机利用Labview设计相关的VI界面来控制数据的采集,在此VI界面中能够对测速主机的主CAN和从CAN进行切换。上位机通过虚拟仪器搭建的软件系统对各个下位机的数据进行采集和分析管理,并且对下位机的工作状态进行实时监控。上位机界面中能够实时的显示具体的速度信息和历史曲线的显示。整个系统能达到故障导向安全的状态,有较高的可靠性。
[Abstract]:Marshalling stations play a particularly important role in modern railways, mainly responsible for the distribution and compilation of freight vehicles. The speed measuring radar is an important measuring equipment in the automatic control system of marshalling station. The traditional speed measuring radar output is a square wave signal directly proportional to the speed of the rolling vehicle and is directly introduced into the indoor speed measuring computer through the cable. With the electrification transformation of the peripheral line and the tail of the marshalling station, when the electric locomotive starts up, the instantaneous current is large, and part of the current goes back through the earth, which causes the change of the backflow direction ground potential and interferes with the radar equipment. The electromagnetic interference (EMI) is more serious and its propagation mode is in the form of space field, which will cause great interference to the velocity measuring radar and the signal self-checking channel. The result is that the speed measurement radar can not work properly. In this context, digital transmission is proposed to replace the traditional direct transmission of analog signals. This paper focuses on the digital transmission of Doppler radar signals. Can bus with strong anti-interference ability is used in the bottom bus of the lower computer. Using can bus technology, dozens of speed measuring radars in marshalling station are formed into a high reliable speed measurement network, and the topology is based on double can bus. According to the position of the marshalling station speed measuring radar and the requirement of reliability and security of the network system, the can application layer protocol is designed, which conforms to the specification of EN50159. The outdoor hump speed measuring host chip adopts the high performance STM32F105RBT6 microprocessor. There are two can paths. And use KEIL 5 to write related lower computer program. The lower computer is mainly responsible for data acquisition and conversion, and the upper computer uses LabVIEW to design the related VI interface to control the data acquisition. In this VI interface, the master can and the slave can of the speed measuring host can be switched. The upper computer collects and analyzes the data of each lower computer through the software system built by virtual instrument, and monitors the working state of the lower computer in real time. PC interface can display specific speed information and history curve display in real time. The whole system can reach the state of fault guidance and safety, and has high reliability.
【学位授予单位】：华东交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U291.4;TN959

【参考文献】