本文選題：化工安全控制系統(tǒng) + 中央控制組件��； 參考：《杭州電子科技大學(xué)》2013年碩士論文

【摘要】：當(dāng)前，我國化工生產(chǎn)規(guī)模日益龐大，而化工生產(chǎn)過程往往伴隨著高危險(xiǎn)性。這就迫切需要使用一種安全有效的化工安全控制系統(tǒng)來監(jiān)控整個(gè)生產(chǎn)過程，使其在提高生產(chǎn)效率的同時(shí)保障人員和設(shè)備的安全。而如何保證這種化工安全控制系統(tǒng)的可靠性和穩(wěn)定性是設(shè)計(jì)的關(guān)鍵。 化工安全控制系統(tǒng)的每個(gè)控制周期包括數(shù)據(jù)采集、邏輯控制運(yùn)算和控制命令執(zhí)行三部分，而中央控制組件主要完成邏輯控制運(yùn)算，以及采樣數(shù)據(jù)和控制命令的傳輸，因此中央控制組件是化工安全控制系統(tǒng)的核心。要提高化工安全控制系統(tǒng)的可靠性，主要是提高中央控制組件的可靠性。 本文以中央控制組件為研究對(duì)象，針對(duì)其所完成的工作提出三項(xiàng)措施來提高其可靠性：首先提出一種自定義的安全控制總線，來保證數(shù)據(jù)傳輸?shù)目煽啃�；其次通過對(duì)中央控制組件內(nèi)的控制模塊采用三模冗余方式，來保證控制運(yùn)算的可靠性；最后利用IEEE1588PTP精確時(shí)鐘協(xié)議，來保證各控制模塊的時(shí)鐘同步，為其三模冗余時(shí)的協(xié)調(diào)工作打下基礎(chǔ)。 針對(duì)上述提出的三項(xiàng)應(yīng)對(duì)措施，本文所做工作如下： (1)在分析國內(nèi)外多種主流安全現(xiàn)場總線的基礎(chǔ)上，結(jié)合中央控制組件的結(jié)構(gòu)，提出了一種自定義安全控制總線，，并詳細(xì)闡述了其運(yùn)行方式和其實(shí)現(xiàn)安全的原理，同時(shí)介紹了其報(bào)文協(xié)議。 (2)詳細(xì)介紹了三模冗余技術(shù)在中央控制組件中的實(shí)現(xiàn)過程，并提出一種三模冗余過程中系統(tǒng)重構(gòu)時(shí)的數(shù)據(jù)恢復(fù)方法，同時(shí)介紹了針對(duì)采用三模冗余結(jié)構(gòu)的控制模塊的一些應(yīng)用實(shí)現(xiàn)。 (3)經(jīng)過分析幾種以太網(wǎng)時(shí)鐘同步技術(shù)的特性，最終決定采用同步精度最高的IEEE1588精確時(shí)鐘協(xié)議來應(yīng)用于中央控制組件，同時(shí)搭建了基于IEEE1588協(xié)議的點(diǎn)對(duì)點(diǎn)主從時(shí)鐘同步平臺(tái)，介紹了其同步過程和操作步驟，并通過實(shí)驗(yàn)結(jié)果驗(yàn)證了PTP協(xié)議的同步精度。 本文最后對(duì)全文所做的研究工作進(jìn)行總結(jié)，并提出了需要進(jìn)一步進(jìn)行改進(jìn)和研究的地方。
[Abstract]:At present, the scale of chemical production in China is increasing, and the chemical production process is often accompanied by high risk. Therefore, it is urgent to use a safe and effective chemical safety control system to monitor the whole production process so as to ensure the safety of personnel and equipment while improving the production efficiency. How to ensure the reliability and stability of the chemical safety control system is the key to the design. Each control cycle of chemical safety control system consists of three parts: data acquisition, logic control operation and control command execution, while the central control component mainly completes logic control operation, and the transmission of sampling data and control command. So central control module is the core of chemical safety control system. In order to improve the reliability of chemical safety control system, the reliability of central control components should be improved. This paper takes the central control component as the research object, and puts forward three measures to improve the reliability of the central control module. Firstly, a self-defined security control bus is proposed to ensure the reliability of data transmission. Secondly, the reliability of the control operation is ensured by using the three-mode redundancy mode in the control module of the central control module. Finally, the clock synchronization of each control module is ensured by using the IEEE1588PTP precise clock protocol. It lays a foundation for the coordination of the three-mode redundancy. The work of this paper is as follows: (1) based on the analysis of various domestic and foreign mainstream security fieldbus and the structure of central control component, a kind of self-defined security control bus is proposed. At the same time, the paper introduces its message protocol. (2) the realization process of three-mode redundancy technology in central control component is introduced in detail. A data recovery method for system reconstruction in the process of three-mode redundancy is proposed, and some application implementations of the control module with three-mode redundancy structure are introduced. (3) the characteristics of several Ethernet clock synchronization techniques are analyzed. Finally, it is decided to use IEEE 1588 precise clock protocol with the highest synchronization precision to apply to the central control component. At the same time, a point-to-point master-slave clock synchronization platform based on IEEE1588 protocol is built, and the synchronization process and operation steps are introduced. The synchronization accuracy of PTP protocol is verified by experimental results. Finally, this paper summarizes the research work done in this paper, and points out the need for further improvement and research.
【學(xué)位授予單位】：杭州電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TQ086;TP273

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 馬連川,劉波;一種分布式三模冗余控制系統(tǒng)的實(shí)現(xiàn)[J];北方交通大學(xué)學(xué)報(bào);2000年05期

2 沈潔,單冬;基于現(xiàn)場總線的三模冗余計(jì)算機(jī)聯(lián)鎖控制系統(tǒng)的研究[J];北方交通大學(xué)學(xué)報(bào);1998年05期

3 王曉冬;闞德濤;張志武;;以太網(wǎng)的時(shí)鐘同步技術(shù)[J];電子工程師;2008年09期

4 宮傳峰;;淺析分布式控制系統(tǒng)DCS[J];化學(xué)工程與裝備;2011年03期

5 歐陽家淦;岑宗浩;周健;;PTP時(shí)鐘同步協(xié)議分析及應(yīng)用探討[J];華東電力;2008年08期

6 郭海濤;陽憲惠;;安全系統(tǒng)的安全完整性水平及其選擇[J];化工自動(dòng)化及儀表;2006年02期

7 方來華;吳宗之;劉冀;楊凌;;安全相關(guān)控制系統(tǒng)中的安全總線分析和研究[J];化工自動(dòng)化及儀表;2007年01期

8 劉天田,袁由光,楊升春,代征;一種TMR容錯(cuò)服務(wù)器永久故障恢復(fù)機(jī)制的研究與實(shí)現(xiàn)[J];艦船電子工程;2005年01期

9 孫娜,熊偉,丁宇征;時(shí)鐘同步的研究與應(yīng)用[J];計(jì)算機(jī)工程與應(yīng)用;2003年27期

10 黎忠文;;嵌入式實(shí)時(shí)系統(tǒng)容錯(cuò)集成技術(shù)的研究[J];計(jì)算機(jī)科學(xué);2006年05期

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