目錄
摘要 4
關(guān)鍵詞 4
第1章緒論 5
1.1課題背景和意義 5
1.2研究現(xiàn)狀與發(fā)展前景 5
1.2.1自動化技術(shù)的研究現(xiàn)狀與發(fā)展前景 5
1.2.2現(xiàn)場總線技術(shù)的研究現(xiàn)狀與發(fā)展前景 6
1.2.3現(xiàn)場總線的標準現(xiàn)狀和最新進展 7
1.2.4幾種典型現(xiàn)場總線介紹與對比 8
1.2.5 CAN總線的研究現(xiàn)狀與發(fā)展前景 9
2.1.1監(jiān)控系統(tǒng)的總體功能框圖 11
2.1.2監(jiān)控系統(tǒng)的功能 12
2.2監(jiān)控單元硬件設(shè)計方案的確定 12
2.3監(jiān)控系統(tǒng)軟件設(shè)計方案的確定 12
2.3．1監(jiān)控單元開發(fā)軟件的確定 12
2.3.2監(jiān)控機開發(fā)軟件的確定 12
2.4本章小結(jié) 13
第3章監(jiān)控單元的軟硬件研究與設(shè)計 13
3.1單片機與CAN控制模塊的硬件設(shè)計 13
3.1.1 80C51單片機特點 13
3.1.2 CAN收發(fā)器PCA82C250簡介 14
3.1.3 芯片SJA1000的概述 14
3.1.4.單片機與CAN控制電路原理圖設(shè)計 17
3.1.5 RS-232/485模塊設(shè)計 17
3.1.6 時鐘模塊設(shè)計 19
3.1.7.報警模塊的硬件電路設(shè)計 20
3.2溫度采集電路的設(shè)計 20
3.3 ADC0809轉(zhuǎn)換電路 22
3.4 CAN協(xié)議概述 24
3.4.1  CAN協(xié)議的分層結(jié)構(gòu) 25
3.4.2 CAN的報文傳輸 25
3.5監(jiān)控單元的軟件設(shè)計與研究 26
3.5.1位定時寄存器的設(shè)置原理 26
3.5.2概念綜述 26
3.5.3波特率的設(shè)置原理 28
3.5.4設(shè)置位定時寄存器參數(shù)的步驟 29
3．6監(jiān)控單元的軟件設(shè)計 32
3.6.1軟件主函數(shù)流程框圖 32
3.6.2主程序 32
3.5本章小結(jié) 36
第4章監(jiān)控機軟件的研究與開發(fā) 37
4.1 CAN適配卡 37
4.1.1 CAN適配卡簡介 37
4.1.2 CAN適配卡設(shè)備驅(qū)動程序的安裝方法 37
4.1.3 CAN適配卡API的使用方法 37
4.1.3.1調(diào)用動態(tài)庫的方法 38
4.2現(xiàn)場監(jiān)控軟件的設(shè)計 38
4.2.1現(xiàn)場監(jiān)控軟件的功能 38
4.2.2現(xiàn)場監(jiān)控軟件的具體設(shè)計 38
4.3本章小結(jié) 39
結(jié)論 40
參考文獻： 41

基于單片機的分布式監(jiān)控系統(tǒng)

摘要：CAN總線技術(shù)是隨著控制技術(shù)、計算機技術(shù)和通信技術(shù)的飛速發(fā)展和數(shù)字化儀器儀表的成熟和廣泛應(yīng)用而逐漸發(fā)展起來的，具有開放式，全數(shù)字化，雙向串行，多節(jié)點通信等優(yōu)點。論文在對主流現(xiàn)場總線進行分析對比及深入了解國內(nèi)外監(jiān)控系統(tǒng)發(fā)展現(xiàn)狀的基礎(chǔ)上，，利用CAN總線作為通信總線，采用高速、外部接口豐富的SJA1000CAN控制器和80C51單片機設(shè)計了以數(shù)據(jù)采集為核心的CAN總線監(jiān)控系統(tǒng)。該系統(tǒng)具有通用性強、可靠性高、擴展性好、系統(tǒng)配置靈活、可現(xiàn)場監(jiān)控與下載等優(yōu)點。

關(guān)鍵詞:現(xiàn)場總線;CAN總線;單片機；監(jiān)控單元;波特率設(shè)置。

Based on SCM Distributed Control System

Abstract: CAN bus technology, with control technology, computer technology and communication technology and the rapid development of digital instrumentation and extensive application of mature gradually developed, with open, all-digital, two-way serial, multi-node communications Advantages. Papers in the mainstream Fieldbus Comparative analysis of domestic and international monitoring and in-depth understanding of systems development on the basis of the status quo, using CAN bus as a communications bus, a high-speed external interface rich SJA1000CAN controllers and 80C51 microcontroller design A data collection as the core of the CAN bus monitoring system. The system has high universality, high reliability, scalability, and system configuration flexibility, and can be downloaded at the scene monitoring the advantages.
Key words: Fieldbus; CAN bus; SCM; Monitoring Unit; baud rate settings.