本文選題：工業(yè)以太網(wǎng)　切入點：基礎(chǔ)資源庫　出處：《西南大學(xué)》2017年碩士論文

【摘要】：由于工業(yè)以太網(wǎng)技術(shù)顯著的優(yōu)勢,其應(yīng)用范圍越來越廣泛。但是眾多的工業(yè)以太網(wǎng)解決方案,致使同一工業(yè)現(xiàn)場時常出現(xiàn)多種協(xié)議共存,而單一設(shè)備僅能適應(yīng)一種網(wǎng)絡(luò)。實際現(xiàn)場中,同一工廠不同應(yīng)用的工程實施時間不同,所采用的網(wǎng)絡(luò)會有所差異;同一系統(tǒng)各子系統(tǒng)之間所用網(wǎng)絡(luò)也不盡相同。設(shè)計者和使用者時常會受到不同協(xié)議之間轉(zhuǎn)換的問題困擾,不得不購置大量適用于不同控制網(wǎng)絡(luò)的設(shè)備,作為不同網(wǎng)絡(luò)的備件,來維持整個系統(tǒng)的穩(wěn)定性與完整性。多種網(wǎng)絡(luò)的并存使得工業(yè)設(shè)備的開發(fā)者和使用者都面臨著巨大的考驗,亟需一種具有動態(tài)適應(yīng)網(wǎng)絡(luò)通信變化能力的節(jié)點設(shè)備。為了使得網(wǎng)絡(luò)節(jié)點設(shè)備可以滿足多種不同工業(yè)以太網(wǎng)的通信需求,節(jié)點設(shè)備需要具有在線辨識的能力,動態(tài)辨識所在網(wǎng)絡(luò)的協(xié)議類型,同時節(jié)點設(shè)備還需要具有在線重構(gòu)的功能,在不斷開系統(tǒng)的情況下自動重配置節(jié)點設(shè)備內(nèi)部的協(xié)議類型。節(jié)點設(shè)備還需要能盡可能多的支持多種工業(yè)以太網(wǎng),對應(yīng)的基礎(chǔ)資源庫構(gòu)建也非常重要。本文將局部動態(tài)可重構(gòu)技術(shù)的思想和方法應(yīng)用到工業(yè)以太網(wǎng)中,設(shè)計研究局部動態(tài)可重構(gòu)網(wǎng)絡(luò)節(jié)點,使得底層網(wǎng)絡(luò)節(jié)點設(shè)備可以兼容多種工業(yè)以太網(wǎng),增強了網(wǎng)絡(luò)節(jié)點設(shè)備的復(fù)用性和互換性。研究中,構(gòu)建了針對三種工業(yè)以太網(wǎng)的基礎(chǔ)資源庫;建立了協(xié)議辨識算法;對局部動態(tài)重構(gòu)的方法進行研究設(shè)計。本文的主要研究工作如下:(1)構(gòu)建工業(yè)以太網(wǎng)的基礎(chǔ)資源庫。以FPGA技術(shù)為基礎(chǔ),對三種工業(yè)以太網(wǎng)EtherCAT、Powerlink和Modbus TCP/IP的通信模型及節(jié)點結(jié)構(gòu)進行分析,以硬件電路,FPGA的硬件邏輯,片上可編程系統(tǒng),以及在Nios II軟核中的軟件設(shè)計相結(jié)合的方式,研發(fā)可獨立實現(xiàn)各以太網(wǎng)通信功能的基礎(chǔ)資源庫。(2)動態(tài)重構(gòu)網(wǎng)絡(luò)節(jié)點的通信協(xié)議在線辨識。在接入相應(yīng)的工業(yè)以太網(wǎng)網(wǎng)絡(luò)后,對網(wǎng)絡(luò)中的通信幀進行解析,自動識別當(dāng)前網(wǎng)絡(luò)的協(xié)議類型。根據(jù)以太網(wǎng)通信幀的結(jié)構(gòu),分析辨識原理,設(shè)計辨識電路,約定辨識節(jié)點,研究辨識節(jié)點值獲取算法,然后采用C4.5決策樹算法自動完成協(xié)議類型的識別。(3)動態(tài)重構(gòu)網(wǎng)絡(luò)節(jié)點得工業(yè)以太網(wǎng)局部動態(tài)硬件可重構(gòu)。將局部動態(tài)硬件可重構(gòu)技術(shù)應(yīng)用到工業(yè)以太網(wǎng)中,按照可重構(gòu)方法六步驟,重構(gòu)配置,重構(gòu)劃分,重構(gòu)辨識,重構(gòu)規(guī)劃,重構(gòu)切換,重構(gòu)評估,設(shè)計研發(fā)局部動態(tài)可重構(gòu)網(wǎng)絡(luò)節(jié)點。并分別對這六個步驟進行了詳細(xì)的研究和開發(fā)。最后搭建實物平臺,分別建立三種工業(yè)以太網(wǎng)的通信網(wǎng)絡(luò),將動態(tài)重構(gòu)網(wǎng)絡(luò)節(jié)點依次接入三種網(wǎng)絡(luò),通過信號抓取,實物觀測,通信仿真來判斷動態(tài)重構(gòu)網(wǎng)絡(luò)節(jié)點是否能夠在線辨識協(xié)議當(dāng)前網(wǎng)絡(luò)的類型,自動重構(gòu)節(jié)點內(nèi)部的協(xié)議類型,完成通信。從而驗證動態(tài)重構(gòu)網(wǎng)絡(luò)節(jié)點辨識功能、重構(gòu)功能與通信功能的正確性。
[Abstract]:Because of the obvious advantage of industrial Ethernet technology, its application scope is more and more extensive.However, many industrial Ethernet solutions lead to the coexistence of multiple protocols in the same industrial site, while a single device can only adapt to one network.In practice, different application time of project in the same plant will lead to different network, and the network used among subsystems of the same system will be different.Designers and users often suffer from the problem of conversion between different protocols and have to purchase a large number of equipment suitable for different control networks as spare parts for different networks to maintain the stability and integrity of the whole system.With the coexistence of many kinds of networks, the developers and users of industrial equipments are facing a great challenge. It is urgent to have a kind of node equipment which can adapt to the change of network communication dynamically.In order to make the network node equipment meet the communication requirements of different industrial Ethernet, the node equipment needs to have the ability of on-line identification and dynamically identify the protocol type of the network in which it is located.At the same time, the node equipment also needs to have the function of online reconfiguration, and automatically reconfigure the protocol type of the node device under the condition of continuously opening the system.Node devices also need to be able to support as many industrial Ethernet as possible.This paper applies the idea and method of local dynamic reconfigurable technology to industrial Ethernet, designs and studies local dynamic reconfigurable network nodes, so that the underlying network node devices can be compatible with various industrial Ethernet.The reusability and interchangeability of network node devices are enhanced.In the research, the basic resource base of three kinds of industrial Ethernet is constructed; the protocol identification algorithm is established; and the method of local dynamic reconstruction is studied and designed.The main research work of this paper is as follows: 1) constructing the basic resource base of industrial Ethernet.Based on FPGA technology, the communication model and node structure of three kinds of industrial Ethernet Ethernet Ethernet Powerlink and Modbus TCP/IP are analyzed. The hardware logic of hardware circuit, the on-chip programmable system and the software design in Nios II soft core are combined.Research and development of the basic resource base. 2) dynamically reconstructing the communication protocol online identification of the network nodes which can independently realize the communication function of each Ethernet.After accessing the corresponding industrial Ethernet network, the communication frames in the network are analyzed, and the protocol types of the current network are automatically identified.According to the structure of Ethernet communication frame, the identification principle is analyzed, the identification circuit is designed, the node is agreed to be identified, and the algorithm of obtaining the value of the identification node is studied.Then the C4.5 decision tree algorithm is used to automatically complete the recognition of protocol types. The network nodes are dynamically reconstructed to obtain the local dynamic hardware reconfiguration of industrial Ethernet.The local dynamic hardware reconfigurable technology is applied to industrial Ethernet. According to the six steps of reconfigurable method, reconfiguration configuration, reconfiguration partition, reconfiguration identification, reconfiguration planning, reconfiguration switching, reconfiguration evaluation, etc.Design and development of local dynamic reconfigurable network nodes.The six steps are studied and developed in detail.Finally, the physical platform is built, and the communication networks of three kinds of industrial Ethernet are established respectively. The dynamically reconstructed network nodes are connected to the three kinds of networks in turn, and through the signal grabbing, the physical observation is carried out.Communication simulation is used to determine whether the dynamically reconfigurable network node can identify the current network type on line, automatically reconfigure the protocol type within the node, and complete the communication.In order to verify the dynamic reconfiguration network node identification function, the reconstruction function and the communication function correctness.
【學(xué)位授予單位】：西南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP273

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