本文選題：數字化傳輸 + STM32F105��； 參考：《華東交通大學》2017年碩士論文

【摘要】：編組站在現代鐵路中扮演的角色尤為重要,主要負責貨運車輛的集散和解編。測速雷達是編組站自動化控制系統(tǒng)中的重要測量設備,傳統(tǒng)的測速雷達輸出是與溜放車輛速度成正比的方波信號,并通過電纜直接引入室內測速計算機。隨著編組站周邊線路及編尾的電氣化改造,編尾有電力機車啟動時,瞬間電流較大,部分電流通過大地回流,引起回流方向地電位變化,對雷達設備產生干擾。其中電磁干擾較為嚴重,其傳播方式是以空間場的形式向外傳播,會給測速雷達以及信號的自檢通道產生較大的干擾。導致測速不準或測速雷達不能正常工作。在此背景下本文提出利用數字化傳輸方式來替代傳統(tǒng)的模擬信號直接傳輸,本文研究重點為多普勒雷達信號的數字化傳輸。下位機底層總線選用抗干擾能力較強的CAN總線。利用CAN總線技術將編組站幾十臺測速雷達組成一個高可靠的測速網絡,拓撲結構采取雙CAN總線型。針對編組站測速雷達的位置以及網絡系統(tǒng)對可靠性和安全性的要求,設計了相關的CAN應用層協(xié)議,且符合EN50159的規(guī)范,室外駝峰測速主機芯片采用性能較高的STM32F105RBT6微處理器,擁有兩個CAN通路。并利用KEIL5編寫相關的下位機程序。下位機主要負責數據采集和轉換,上位機利用Labview設計相關的VI界面來控制數據的采集,在此VI界面中能夠對測速主機的主CAN和從CAN進行切換。上位機通過虛擬儀器搭建的軟件系統(tǒng)對各個下位機的數據進行采集和分析管理,并且對下位機的工作狀態(tài)進行實時監(jiān)控。上位機界面中能夠實時的顯示具體的速度信息和歷史曲線的顯示。整個系統(tǒng)能達到故障導向安全的狀態(tài),有較高的可靠性。
[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.
【學位授予單位】：華東交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U291.4;TN959

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