數(shù)字式溫濕度智能檢測(cè)系統(tǒng)的設(shè)計(jì) 畢業(yè)論文

數(shù)字式溫濕度智能檢測(cè)系統(tǒng)的設(shè)計(jì)
 摘要 溫濕度的測(cè)量在倉儲(chǔ)管理、工業(yè)生產(chǎn)制造、智能建筑、科學(xué)研究及日常生活中被廣泛應(yīng)用，并且隨著計(jì)算機(jī)技術(shù)的飛速發(fā)展和廣泛應(yīng)用，現(xiàn)代工業(yè)生產(chǎn)與計(jì)算機(jī)技術(shù)聯(lián)系的越來越緊密，借助當(dāng)今計(jì)算機(jī)的快速綜合處理能力，實(shí)施對(duì)溫濕度的計(jì)算機(jī)監(jiān)控，對(duì)降低生產(chǎn)安全因素，提高勞動(dòng)效率，改善生產(chǎn)環(huán)境有很重要的積極作用。本系統(tǒng)采用技術(shù)成熟的SHT11芯片作為測(cè)量濕度和溫度的傳感器。控制系統(tǒng)芯片采用技術(shù)成熟，功能強(qiáng)大、價(jià)位低廉大眾化的AT89C51單片機(jī)。硬件采抗干擾措施采用集成看門狗芯片DS1232，它使系性能得到了改善。由本設(shè)計(jì)課題做成的溫濕度檢測(cè)系統(tǒng)結(jié)構(gòu)簡(jiǎn)單、價(jià)格便宜、量程寬，具有較高的可靠性、安全性及實(shí)用性。

關(guān)鍵詞  單片機(jī)，SHT11，溫濕度檢測(cè)

The design of Digital Temperature and Humidity Intelligent Measurement System
Abstract  This paper has designed an intelligent temperature and humidity measurement system with many measuring points. With the new science and technology increasingly, our society has made great progress! In the industrial and agricultural production，meteorology，environmental，national defense，scientific research，aerospace，and other departments, it is usually necessarily to measure and control the environmental temperature and humidity. The virtual network rapid development of a more long-range temperature and humidity control of the increasingly mature. This system uses the technology mature SHT11 as temperature and humidity-measuring the sensor. The control use technology is mature，low price of the popular AT89C51，the keyboard instruments/monitors，switch control，alarm circuits and are directly linked AT89C51.The watchdog circuit hardware is used to anti-interference，using a software command redundant technology，so that they have improved in performance. In the design, the errors of factors have also carried out some theoretical analysis to prove that this design is feasible. The issue posed by the design of more than make the temperature and humidity monitoring system is simple，cheap，wide range，a higher degree of reliability，safety and practicality.
Keywords  Single Chip, SHT11, Temperature and Humidity Sensors

 
目錄
第一章 引言 1
1.1  研究意義 1
1.2  國(guó)內(nèi)外發(fā)展趨勢(shì) 1
1.3  系統(tǒng)的主要性能指標(biāo) 2
1.4  主要工作任務(wù) 2
第二章  系統(tǒng)方案選擇和工作原理 3
2.1  系統(tǒng)綜述 3
2.2  系統(tǒng)設(shè)計(jì)方案 3
2.3  系統(tǒng)工作原理 3
第三章 系統(tǒng)硬件設(shè)計(jì) 5
3.1  單片機(jī)的選擇 5
3.1.1  晶振回路 5
3.1.2  復(fù)位電路 6
3.2  溫濕度傳感器的選擇 8
3.2.1  SHT11的工作原理 9
3.2.2  SHT11的傳輸特性 11
3.2.3  I2C總線簡(jiǎn)介 12
3.3  溫濕度測(cè)量回路的設(shè)計(jì) 13
3.4  顯示電路設(shè)計(jì) 14
3.5  報(bào)警電路設(shè)計(jì) 15
3.6  電源電路設(shè)計(jì) 16
第四章 系統(tǒng)的軟件設(shè)計(jì) 18
4.1主程序的設(shè)計(jì) 18
4.2  I2C模塊程序設(shè)計(jì) 21
4.3  LED顯示程序設(shè)計(jì) 23
4.4  報(bào)警電路程序設(shè)計(jì) 24
第五章 系統(tǒng)抗干擾措施 25
5.1  硬件抗干擾措施 25
5.2  軟件抗干擾措施 26
第六章 結(jié)論 28
致謝 29
參考文獻(xiàn) 30
附錄A  系統(tǒng)原理圖 31