基于RFID的交通信息采集系統(tǒng)的研究與設計
發(fā)布時間：2018-11-18 22:01
【摘要】：隨著國民經(jīng)濟的飛速發(fā)展,交通需求不斷增加,交通擁堵、交通違規(guī)等現(xiàn)象頻繁發(fā)生,已成為各個城市面臨的共同問題,智能交通運輸系統(tǒng)ITS(Intelligent Transportation System)正是解決道路交通問題的一個有效方法。ITS能否穩(wěn)定而高效地運行,關(guān)鍵取決于獲取實時、全面、準確的交通信息。針對現(xiàn)有交通信息采集方法的不足之處,論文提出采用攜帶無源標簽的車輛作為電子標識,以實現(xiàn)一種基于RFID的交通信息采集系統(tǒng)的研究與設計。論文介紹和分析了現(xiàn)有智能交通信息采集系統(tǒng)存在的問題,闡述了RFID應用于交通信息采集的必要性,并對國內(nèi)外的研究現(xiàn)狀進行了詳細地介紹。文章把無源車載標簽應用到交通信息采集系統(tǒng)中,提出了雙頻處理的方案,低頻率用于無源車載標簽供電,高頻率用于數(shù)據(jù)交換;在多個無源車載標簽難以識別的前提下提出了預先偵測查詢樹防碰撞算法的改進算法和按段排序防碰撞算法;對于數(shù)據(jù)的安全傳輸,系統(tǒng)采用了DES加密和解密算法;在系統(tǒng)的設計上,論文首先構(gòu)建了整個系統(tǒng),對系統(tǒng)的各個主要功能模塊進行了劃分,完成了系統(tǒng)的軟件設計,然后論文分兩個章節(jié)重點設計了系統(tǒng)的硬件部分,主要是讀卡器和無源車載標簽的設計,其中讀卡器的設計包括讀卡器的總體框架、讀卡器的外圍電路、讀卡器的數(shù)字硬件邏輯設計,而無源車載標簽的設計上,主要涉及到總體框架、關(guān)鍵外圍電路、關(guān)鍵數(shù)字邏輯設計,后面對硬件中部分重要模塊進行了仿真驗證。最后,根據(jù)設計方案對文中提出的兩種射頻識別防碰撞算法進行了MATLAB仿真,對讀卡器與無源車載標簽數(shù)字硬件邏輯核心模塊中的防碰撞模塊與DES加密解密模塊進行了Moldesim仿真,并對無源車載標簽的無線供電進行了模擬實驗,仿真和實驗結(jié)果表明該系統(tǒng)具備多標簽防沖突、多標簽快速識別、數(shù)據(jù)加密解密的功能,并驗證了無源車載標簽應用于交通信息采集的可行性,開創(chuàng)了一個新的應用前景。
[Abstract]:With the rapid development of the national economy, traffic demand is increasing, traffic congestion, traffic violations and other phenomena occur frequently, which has become a common problem faced by every city. Intelligent Transportation system (ITS (Intelligent Transportation System) is an effective method to solve road traffic problems. Whether ITS can run stably and efficiently depends on obtaining real-time, comprehensive and accurate traffic information. In order to realize the research and design of a traffic information collection system based on RFID, the paper proposes to use the vehicle with passive label as the electronic marking to overcome the shortcomings of the existing traffic information collection methods. This paper introduces and analyzes the problems existing in the existing intelligent traffic information collection system, expounds the necessity of the application of RFID in traffic information collection, and introduces in detail the current research situation at home and abroad. In this paper, the passive vehicle label is applied to the traffic information collection system, and a dual frequency processing scheme is proposed. The low frequency is used for the passive vehicle label power supply, and the high frequency is used for data exchange. Under the premise that many passive vehicle tags are difficult to identify, the improved algorithm of pre-detection query tree anti-collision algorithm and the anti-collision algorithm of sorting according to segment are put forward, and the DES encryption and decryption algorithm are used for the secure transmission of data. In the design of the system, the thesis first constructs the whole system, divides the main function modules of the system, completes the software design of the system, and then designs the hardware part of the system in two chapters. It is mainly about the design of card reader and passive vehicle label, in which the design of card reader includes the overall frame of card reader, the peripheral circuit of card reader, the digital hardware logic design of card reader, and the design of passive vehicle label. It mainly involves the overall framework, the key peripheral circuits, the key digital logic design, and then some important modules in the hardware are simulated and verified. Finally, according to the design scheme, the two anti-collision algorithms proposed in this paper are simulated by MATLAB, and the anti-collision module and DES encryption and decryption module of card reader and passive vehicle tag digital logic module are simulated by Moldesim. The simulation experiment on wireless power supply of passive vehicle label shows that the system has the functions of multi-label anti-collision, multi-label fast recognition, data encryption and decryption. The feasibility of application of passive vehicle label to traffic information collection is verified, which opens up a new application prospect.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U495
[Abstract]:With the rapid development of the national economy, traffic demand is increasing, traffic congestion, traffic violations and other phenomena occur frequently, which has become a common problem faced by every city. Intelligent Transportation system (ITS (Intelligent Transportation System) is an effective method to solve road traffic problems. Whether ITS can run stably and efficiently depends on obtaining real-time, comprehensive and accurate traffic information. In order to realize the research and design of a traffic information collection system based on RFID, the paper proposes to use the vehicle with passive label as the electronic marking to overcome the shortcomings of the existing traffic information collection methods. This paper introduces and analyzes the problems existing in the existing intelligent traffic information collection system, expounds the necessity of the application of RFID in traffic information collection, and introduces in detail the current research situation at home and abroad. In this paper, the passive vehicle label is applied to the traffic information collection system, and a dual frequency processing scheme is proposed. The low frequency is used for the passive vehicle label power supply, and the high frequency is used for data exchange. Under the premise that many passive vehicle tags are difficult to identify, the improved algorithm of pre-detection query tree anti-collision algorithm and the anti-collision algorithm of sorting according to segment are put forward, and the DES encryption and decryption algorithm are used for the secure transmission of data. In the design of the system, the thesis first constructs the whole system, divides the main function modules of the system, completes the software design of the system, and then designs the hardware part of the system in two chapters. It is mainly about the design of card reader and passive vehicle label, in which the design of card reader includes the overall frame of card reader, the peripheral circuit of card reader, the digital hardware logic design of card reader, and the design of passive vehicle label. It mainly involves the overall framework, the key peripheral circuits, the key digital logic design, and then some important modules in the hardware are simulated and verified. Finally, according to the design scheme, the two anti-collision algorithms proposed in this paper are simulated by MATLAB, and the anti-collision module and DES encryption and decryption module of card reader and passive vehicle tag digital logic module are simulated by Moldesim. The simulation experiment on wireless power supply of passive vehicle label shows that the system has the functions of multi-label anti-collision, multi-label fast recognition, data encryption and decryption. The feasibility of application of passive vehicle label to traffic information collection is verified, which opens up a new application prospect.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U495
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相關(guān)期刊論文 前10條
1 高建平;張小東;蔣銳;;基于圖像處理的交通信息采集[J];重慶交通學院學報;2006年01期
2 秦玲;朱sゼ，
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