【摘要】：摘要：隨著我國經(jīng)濟的飛速發(fā)展,交通擁擠問題日益嚴(yán)重,已成為制約城市經(jīng)濟發(fā)展的瓶頸。車路協(xié)同系統(tǒng)CVIS作為未來交通發(fā)展的核心和方向,是解決城市交通擁堵問題的關(guān)鍵,而高質(zhì)量的無線通信技術(shù)則是整個車路協(xié)同系統(tǒng)的研究重點。 本文的工作是搭建車路協(xié)同環(huán)境下的多模式無線通信平臺,對車路協(xié)同環(huán)境下基于DSRC、WIFI和3G三種無線通信模式的信息交互相關(guān)問題進行研究。論文首先分析了DSRC、WIFI和3G三種無線通信模式在車路協(xié)同系統(tǒng)中的適用性,搭建并完成了包括DSRC模塊、WIFI模塊、3G模塊、車載診斷系統(tǒng)OBD以及GPS定位單元在內(nèi)的基于PCM-9562工業(yè)控制計算機為基礎(chǔ)的多模式無線通信硬件平臺。通過安裝硬件設(shè)備的驅(qū)動程序,設(shè)計完成了DSRC模塊、WIFI模塊和3G模塊的相互無線組網(wǎng),使硬件通信平臺具備多種模式下的通信功能。通過分析車載診斷系統(tǒng)OBD的硬件組成以及內(nèi)部數(shù)據(jù)協(xié)議,編寫上位機應(yīng)用程序,完成了車載OBD系統(tǒng)車輛狀態(tài)信息的采集。 其次,設(shè)計并分析了基于無線通信平臺的三種車路協(xié)同實際應(yīng)用場景,包括單車道情況下的車輛跟馳場景、同方向雙車道情況下的車輛換道場景以及交叉口車輛防撞預(yù)警場景。通過對三種應(yīng)用場景進行建模分析,完成了車輛跟馳場景算法設(shè)計、車輛換道場景算法設(shè)計以及交叉口車輛防撞預(yù)警算法設(shè)計,同時通過對地圖匹配算法的相關(guān)研究,成功繪制試驗場景數(shù)字電子地圖,以GPS定位信息以及車載OBD數(shù)據(jù)作為無線傳輸數(shù)據(jù),實現(xiàn)以多模式無線通信平臺為硬件基礎(chǔ)的上層應(yīng)用軟件設(shè)計及算法實現(xiàn)。 最后,本文分別對DSRC模塊和WIFI模塊的通信性能進行了實地測試,并且對三種車路協(xié)同環(huán)境下的場景分別進行實地測試驗證。通過實時GPS數(shù)據(jù)和車載OBD數(shù)據(jù)的傳輸,實現(xiàn)了上位機應(yīng)用層和多模無線通信平臺之間的數(shù)據(jù)交互,并同時結(jié)合地理信息系統(tǒng)控件MapX,完成在車載平臺上位機上實時顯示本車和其他車輛的位置、速度信息并實時提供給車輛駕駛員不同實際場景下的輔助駕駛策略。測試表明,基于車路協(xié)同的多模式通信平臺可以有效的實現(xiàn)數(shù)據(jù)的實時傳遞,能夠在不同實地試驗場景下輔助駕駛員獲取本車和其他車輛的相關(guān)信息,并且通過試驗場景模型算法的分析計算,最終為駕駛員提供有效的輔助駕駛參考。
[Abstract]:Absrtact: with the rapid development of economy in China, traffic congestion is becoming more and more serious, which has become the bottleneck restricting the development of urban economy. As the core and direction of future traffic development, vehicle-road cooperative system (CVIS) is the key to solve the problem of urban traffic congestion, and high quality wireless communication technology is the research focus of the whole vehicle-road cooperative system. The work of this paper is to build a multi-mode wireless communication platform in the vehicle-road cooperative environment, and to study the information interaction related problems based on DSRC,WIFI and 3G wireless communication modes in the vehicle-road collaborative environment. Firstly, this paper analyzes the applicability of DSRC,WIFI and 3G wireless communication modes in the vehicle-road cooperative system, and builds and completes the 3G module, including the DSRC module, WiFi module and 3G module. The multi-mode wireless communication hardware platform based on PCM-9562 industrial control computer including OBD and GPS positioning unit. By installing the driver of the hardware equipment, the wireless network between the DSRC module and the 3G module is designed and completed, so that the hardware communication platform has the communication function under various modes. By analyzing the hardware composition and internal data protocol of the on-board diagnostic system (OBD), the application program of upper computer is written to complete the collection of vehicle status information in the vehicle-mounted OBD system. Secondly, we design and analyze three kinds of practical application scenarios of vehicle-road coordination based on wireless communication platform, including single lane vehicle following scene, same direction two-lane vehicle changing scene and intersection vehicle collision warning scene. Through modeling and analysis of three application scenarios, the algorithm design of vehicle car-following scene, the algorithm of vehicle changing scene and the design of vehicle anti-collision early warning algorithm at intersection are completed. At the same time, the related research on map matching algorithm is carried out. The digital electronic map of the test scene is successfully drawn. The upper layer application software design and algorithm realization based on multi-mode wireless communication platform are realized by using GPS location information and OBD data on vehicle as wireless transmission data. Finally, the communication performance of the DSRC module and the WIFI module are tested in the field, and the scene of the three kinds of vehicle-road collaborative environment is tested in the field. Through the transmission of real-time GPS data and on-board OBD data, the data exchange between the upper computer application layer and the multi-mode wireless communication platform is realized. At the same time, the GIS control MapX, is used to display the position and speed of the vehicle and other vehicles on the upper computer of the vehicle platform in real time, and to provide the assistant driving strategy for the vehicle driver in different situations. The test results show that the multi-mode communication platform based on vehicle-road cooperation can effectively realize the real-time data transmission, and can assist the driver to obtain the relevant information of the vehicle and other vehicles under different field test scenarios. And through the analysis and calculation of the experimental scene model algorithm, finally provide the driver with effective driving reference.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U495

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