畢業(yè)論文標(biāo)準(zhǔn)WORD格式排版 共52頁(yè) 17425字

摘 要

控制技術(shù)在現(xiàn)代生活和生產(chǎn)中扮演著越來(lái)越重要的角色。為了實(shí)現(xiàn)較高精度的水溫控制，該設(shè)計(jì)運(yùn)用單片機(jī)89C51為控制核心、開關(guān)控制以及利用組態(tài)軟件相結(jié)合的方法來(lái)實(shí)現(xiàn)水溫控制。該系統(tǒng)以鍋爐水溫作為被控制對(duì)象，運(yùn)用熱電阻測(cè)量鍋爐水溫，經(jīng)放大后送入ADC0809將測(cè)量得到的模擬量轉(zhuǎn)化為數(shù)字量送入到單片機(jī)89C51中，利用89C51進(jìn)行處理。同時(shí)該系統(tǒng)將測(cè)量結(jié)果送顯示屏顯示。該系統(tǒng)再根據(jù)處理后的結(jié)果來(lái)控制繼電器的通斷以此來(lái)控制電爐加熱和電磁閥的開斷，既而達(dá)到控制鍋爐的水溫。控制過(guò)程中出現(xiàn)異常情況，聲光報(bào)警器發(fā)出報(bào)警信號(hào)。該系統(tǒng)的通信是利用組態(tài)軟件將單片機(jī)與上位機(jī)相連，達(dá)到遠(yuǎn)程控制水溫的目的。該系統(tǒng)的特點(diǎn)是電路簡(jiǎn)單、程序簡(jiǎn)短、系統(tǒng)可靠性高。

關(guān)鍵詞 89C51, ADC0809, 組態(tài)軟件MCGS


ABSTRACT

Control a technique to play a more and more important role in the modern the life and the industry. For carrying out the water temperature control of the higher accuracy, should design to make use of a single slice the machine 89 C51s to carry out the electronics of the water temperature control to equip for the method that controls the core, switch control and makes use of the monitor and control generated system to combine. That system makes use of the hot electric resistance diagraph boiler water temperature, sending to the temperature that will measure into the ADC0809 to imitate the quantity conversion to send to go into to the single slice the machine 89 C51s for the numerical quantity after enlarge medium, make use of the 89 C51 rightness temperatures to carry on calculation and processing. That system will measure a result to send to a manifestation to hold a manifestation in the meantime. That system again according to after the processing of result to control to break to control the electric stove heating and the electromagnetism valve to open to break with this after of the electric appliances, attain water temperature of control the boiler then. Control to appear an excrescent circumstance in the process, sound and light's reporting to the police a machine will send out to report to the police signal according to the circumstance. The correspondence of that system is to make use of the monitor and control generated system single slice the machine and the place of honor machine connect with each other, attaining the purpose of the long range control water temperature. The characteristic of that system is the electric circuit is simple, the procedure is brief, the system credibility is high.


Keyword 89 C51, ADC0809, Monitor and Control Generated System

目 錄
摘 要 I
ABSTRACT II
緒 論 1
1 方案論證 2
2 微處理器89C51 4
2.1 89C51的外部引腳 4
2.2 89C51的內(nèi)部結(jié)構(gòu) 5
3 A/D轉(zhuǎn)換器0809 8
3.1 主要性能 8
3.2 ADC0809芯片組成原理 9
3.3 ADC0809引腳功能 9
3.4 ADC0809與89C51的硬件接口 10
4 聲光報(bào)警和K型熱電偶放大電路 12
5 鍵盤設(shè)計(jì) 13
5.1 鍵盤接口的輸入和去抖動(dòng) 13
5.2 獨(dú)立式鍵盤及其接口 13
5.3 行列式非編碼鍵盤及其接口 14
5.3.1 程序掃描方式 14
5.3.2 定時(shí)掃描方式 15
5.3.3 中斷掃描方式 16
6 89C51與繼電器連接電路 17
7 LED顯示 18
7.1 LED顯示驅(qū)動(dòng)器MC14489 18
7.1.1 硬件結(jié)構(gòu) 18
7.1.2 工作原理 19
7.1.3 MC14489與單片機(jī)的接口 21
8 串行通信接口選擇 22
8.1 RS—232C接口 22
8.1.1 電氣特性 22
8.1.2 電平轉(zhuǎn)換 23
8.2 RS—422A接口 24
8.2.1 電氣特性 24
8.2.2 電平轉(zhuǎn)換 24
8.3 RS—485接口 26
8.3.1 電氣特性 26
8.3.2 電平轉(zhuǎn)換 26
9 MCGS組態(tài)軟件 29
9.1 MCGS組態(tài)軟件的功能和特點(diǎn) 29
9.2 MCGS組態(tài)軟件的整體結(jié)構(gòu) 31
9.2.1 MCGS工程的五大部分 31
9.3 MCGS組態(tài)軟件的工作方式 32
10 系統(tǒng)軟件設(shè)計(jì) 34
10.1 系統(tǒng)軟件設(shè)計(jì)總流程圖 34
10.2 聲光報(bào)警與水溫控制流程圖 35
10.3 鍵盤設(shè)定溫度流程圖 36
結(jié) 論 37
附錄A：系統(tǒng)電路總圖 38
附錄B：系統(tǒng)程序清單 39
參考文獻(xiàn) 46
致 謝 47