【摘要】：現(xiàn)代工業(yè)的生產(chǎn)規(guī)模在日益壯大,工業(yè)流程更是復(fù)雜多變,工業(yè)裝置不斷更新?lián)Q代,傳統(tǒng)的控制方式已不能滿(mǎn)足工業(yè)生產(chǎn)需求,局域網(wǎng)內(nèi)的控制技術(shù)越來(lái)越不能滿(mǎn)足工業(yè)控制領(lǐng)域的要求,這就迫切希望出現(xiàn)一種不受地域限制、分布式、操作簡(jiǎn)單的控制系統(tǒng)取代傳統(tǒng)的控制手段。隨著網(wǎng)絡(luò)技術(shù)的飛速發(fā)展,而控制技術(shù)相對(duì)發(fā)展緩慢,于是將網(wǎng)絡(luò)和控制技術(shù)相結(jié)合所產(chǎn)生的基于Internet的遠(yuǎn)程控制技術(shù)就應(yīng)運(yùn)而生,對(duì)于工業(yè)生產(chǎn)具有重大意義,對(duì)于控制領(lǐng)域具有研究前景。 遠(yuǎn)程控制技術(shù)已經(jīng)成為工業(yè)領(lǐng)域乃至其他領(lǐng)域的一項(xiàng)研究熱點(diǎn),為了加快控制網(wǎng)絡(luò)的發(fā)展,我們提出基于Internet的遠(yuǎn)程PLC控制研究方案。本課題采用Web服務(wù)技術(shù),充分利用Web服務(wù)跨平臺(tái)、易于穿過(guò)防火墻、減少應(yīng)用接口花費(fèi)等特點(diǎn)實(shí)現(xiàn)遠(yuǎn)程控制技術(shù),下位機(jī)采用PLC作為被控對(duì)象,它作為工業(yè)控制的計(jì)算機(jī),能夠完成各種類(lèi)型的工業(yè)生產(chǎn)控制。本課題在提出基于Web服務(wù)技術(shù)基礎(chǔ)上,重點(diǎn)研究了Web服務(wù)體系結(jié)構(gòu)和關(guān)鍵技術(shù),介紹了硬件平臺(tái)環(huán)境。根據(jù)需求分析提出系統(tǒng)的總體設(shè)計(jì),采用了B/S模式的體系結(jié)構(gòu),設(shè)計(jì)出各個(gè)功能模塊并介紹實(shí)現(xiàn)過(guò)程,研究分析出上下位機(jī)之間的通信格式和通信協(xié)議并實(shí)現(xiàn)串口通信,完成整個(gè)系統(tǒng)的功能。本文還提出關(guān)于系統(tǒng)的安全方面采用服務(wù)器端驗(yàn)證的方式,給予不同類(lèi)型的用戶(hù)不同的訪(fǎng)問(wèn)路徑,結(jié)合安全算法進(jìn)一步加強(qiáng)系統(tǒng)安全性。 本文實(shí)現(xiàn)的基于Internet的遠(yuǎn)程PLC控制系統(tǒng),達(dá)到可控性、實(shí)時(shí)性、安全性等特點(diǎn),充分利用Web服務(wù)的特點(diǎn)擺脫控制受地域限制的缺點(diǎn),減少人力物力資源浪費(fèi),易于控制的優(yōu)點(diǎn)。用戶(hù)只需通過(guò)Internet登錄到控制頁(yè)面,發(fā)出控制指令遠(yuǎn)程操作PLC運(yùn)行,并返回PLC運(yùn)行狀態(tài)供用戶(hù)查看。基于Internet的遠(yuǎn)程控制系統(tǒng)不僅為工業(yè)生產(chǎn)提高了生產(chǎn)效率,為控制網(wǎng)絡(luò)提供參考方法,也為今后的控制技術(shù)提供了研究方向。
[Abstract]:The production scale of modern industry is growing day by day, the industrial process is more complex and changeable, the industrial equipment is constantly updated, and the traditional control mode can no longer meet the demand of industrial production. The local area network (LAN) control technology can not meet the requirements of the industrial control field more and more. Therefore, it is urgently hoped that a kind of control system, which is not limited by the region, distributed and simple to operate, will replace the traditional control methods. With the rapid development of network technology and the slow development of control technology, the remote control technology based on Internet, which is produced by combining network and control technology, has great significance for industrial production. It has a bright future in the field of control. Remote control technology has become a research hotspot in industry and even other fields. In order to speed up the development of control network, we propose a remote PLC control research scheme based on Internet. This subject adopts Web service technology, makes full use of the Web service cross platform, easy to pass through the firewall, reduces the application interface expense and so on the characteristic realizes the remote control technology. The lower computer uses PLC as the controlled object, it takes the industrial control computer. Able to complete various types of industrial production control. On the basis of Web service technology, this paper focuses on the research of Web services architecture and key technologies, and introduces the hardware platform environment. According to the requirement analysis, the overall design of the system is put forward, the system structure of the B / S mode is adopted, each functional module is designed and the realization process is introduced, the communication format and communication protocol between the upper and lower computers are analyzed and the serial port communication is realized. Complete the function of the whole system. This paper also proposes that the security of the system should be verified on the server side, giving different access paths to different types of users, and further enhancing the security of the system in combination with the security algorithm. The remote PLC control system based on Internet realized in this paper achieves the characteristics of controllability, real-time, security and so on. It makes full use of the characteristics of Web service to get rid of the shortcoming of controlling by the limitation of region, to reduce the waste of human and material resources, and to be easy to control. Users simply log in to the control page through Internet, issue control instructions to remotely operate the PLC run, and return the PLC running status for the user to view. The remote control system based on Internet not only improves the production efficiency and provides a reference method for the control network, but also provides the research direction for the control technology in the future.
【學(xué)位授予單位】：西安工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TP393.09;TP273

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