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

【摘要】：編組站在現(xiàn)代鐵路中扮演的角色尤為重要,主要負(fù)責(zé)貨運(yùn)車輛的集散和解編。測(cè)速雷達(dá)是編組站自動(dòng)化控制系統(tǒng)中的重要測(cè)量設(shè)備,傳統(tǒng)的測(cè)速雷達(dá)輸出是與溜放車輛速度成正比的方波信號(hào),并通過(guò)電纜直接引入室內(nèi)測(cè)速計(jì)算機(jī)。隨著編組站周邊線路及編尾的電氣化改造,編尾有電力機(jī)車啟動(dòng)時(shí),瞬間電流較大,部分電流通過(guò)大地回流,引起回流方向地電位變化,對(duì)雷達(dá)設(shè)備產(chǎn)生干擾。其中電磁干擾較為嚴(yán)重,其傳播方式是以空間場(chǎng)的形式向外傳播,會(huì)給測(cè)速雷達(dá)以及信號(hào)的自檢通道產(chǎn)生較大的干擾。導(dǎo)致測(cè)速不準(zhǔn)或測(cè)速雷達(dá)不能正常工作。在此背景下本文提出利用數(shù)字化傳輸方式來(lái)替代傳統(tǒng)的模擬信號(hào)直接傳輸,本文研究重點(diǎn)為多普勒雷達(dá)信號(hào)的數(shù)字化傳輸。下位機(jī)底層總線選用抗干擾能力較強(qiáng)的CAN總線。利用CAN總線技術(shù)將編組站幾十臺(tái)測(cè)速雷達(dá)組成一個(gè)高可靠的測(cè)速網(wǎng)絡(luò),拓?fù)浣Y(jié)構(gòu)采取雙CAN總線型。針對(duì)編組站測(cè)速雷達(dá)的位置以及網(wǎng)絡(luò)系統(tǒng)對(duì)可靠性和安全性的要求,設(shè)計(jì)了相關(guān)的CAN應(yīng)用層協(xié)議,且符合EN50159的規(guī)范,室外駝峰測(cè)速主機(jī)芯片采用性能較高的STM32F105RBT6微處理器,擁有兩個(gè)CAN通路。并利用KEIL5編寫相關(guān)的下位機(jī)程序。下位機(jī)主要負(fù)責(zé)數(shù)據(jù)采集和轉(zhuǎn)換,上位機(jī)利用Labview設(shè)計(jì)相關(guān)的VI界面來(lái)控制數(shù)據(jù)的采集,在此VI界面中能夠?qū)y(cè)速主機(jī)的主CAN和從CAN進(jìn)行切換。上位機(jī)通過(guò)虛擬儀器搭建的軟件系統(tǒng)對(duì)各個(gè)下位機(jī)的數(shù)據(jù)進(jìn)行采集和分析管理,并且對(duì)下位機(jī)的工作狀態(tài)進(jìn)行實(shí)時(shí)監(jiān)控。上位機(jī)界面中能夠?qū)崟r(shí)的顯示具體的速度信息和歷史曲線的顯示。整個(gè)系統(tǒng)能達(dá)到故障導(dǎo)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(xué)位授予單位】：華東交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U291.4;TN959

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