多點(diǎn)溫度巡回檢測系統(tǒng)

電子信息工程論文編號:DZXX195  論文字?jǐn)?shù):12248,頁數(shù):37

目錄

摘要 I
ABSTRACT II
第1章 引言 1
1.1 背景 1
1.2 意義 1
1.3 研究內(nèi)容 2
第2章 方案和器件的比較和選擇 3
2.1 主控制器件的選擇 3
2.2 溫度傳感器的選擇 4
2.3 顯示器的選擇 6
第3章 系統(tǒng)硬件設(shè)計(jì) 7
3.1總體方案 7
3.2 AT89C51單片機(jī)及其外圍電路 8
3.3 DS18B20檢測電路 9
3.4 溫度顯示電路 10
3.5 溫度報(bào)警電路 10
3.6 按鍵選擇電路 11
第4章 系統(tǒng)軟件設(shè)計(jì) 12
4.1主程序流程圖 12
4.2 DS18B20相關(guān)程序設(shè)計(jì) 13
4.2.1 DS18B20的相關(guān)時(shí)序 13
4.2.2讀DS18B20序列號子程序 14
4.2.3 DS18B20的工作流程圖 15
4.3 顯示程序設(shè)計(jì) 17
第5章 系統(tǒng)調(diào)試和實(shí)現(xiàn) 18
5.1系統(tǒng)硬件調(diào)試 18
5.2系統(tǒng)軟件調(diào)試 19
5.3整個(gè)系統(tǒng)調(diào)試 19
5.4系統(tǒng)實(shí)現(xiàn) 19
第6章 結(jié)束語 21
致謝 22
參考文獻(xiàn) 23
附錄 源代碼 24

摘要

 目前，市場上普遍存在的溫度檢測儀器大都是單點(diǎn)測量，而這些溫度檢測儀都有溫度信息傳遞不及時(shí)、精度不夠的缺點(diǎn)，這樣就不利于工業(yè)控制者根據(jù)溫度變化及時(shí)做出決定。在這樣的形式下，開發(fā)一種能夠同時(shí)測量多點(diǎn)，并且實(shí)時(shí)性高、精度高，能夠綜合處理多點(diǎn)溫度信息的測量系統(tǒng)就很有必要。
 而本設(shè)計(jì)就是以AT89C51單片機(jī)系統(tǒng)為核心，能對多點(diǎn)的溫度進(jìn)行實(shí)時(shí)巡檢的系統(tǒng)。該系統(tǒng)主要以AT89C51為中心，是主控制器件。而該系統(tǒng)中多點(diǎn)溫度檢測的功能則是通過溫度傳感器DS18B20實(shí)現(xiàn), DS18B20是一種可組網(wǎng)的高精度數(shù)字式溫度傳感器，由于其具有單總線的獨(dú)特優(yōu)點(diǎn)，可以使用戶輕松地組建起傳感器網(wǎng)絡(luò)，并可使多點(diǎn)溫度測量電路變得簡單、可靠。所以我相信該系統(tǒng)在諸如糧庫測溫、智能建筑、中央空調(diào)等多種需要多點(diǎn)溫度檢測的場合具有較好的應(yīng)用前景。

關(guān)鍵詞：溫度，多點(diǎn)檢測，單片機(jī)，DS18B20

ABSTRACT

 Nowadays, temperature-measuring apparatus in the market only can check and measure the temperature of one point, and the temperature information is not real-time and the precision is low. It takes a great of troubles for the industry-controllers to make decision. In this situation, it is very necessary to develop a measuring system which not only can measure several points with high real time and high accuracy, not also can handle the multiple-point’s temperature comprehensively.
 Therefore, this system is designed with Micro-Controller system as the core, which can realize real-time inspection of multiple-point’s temperature. This system takes AT89C51 as core, namely main controlling part. And the function of multiple-point’s temperature measurement is realized by DS18B20. As a kind of high-accuracy digital net temperature sensor，DS18 B20 can be used building a sensor net easily. It can also make the net simple and reliable with it's special 1-wire interface. Thus, I believe that the system has a good application prospect in the circumstances such as grain depots, intelligent building, central air-conditioning, which need multiple-point’s temperature measurement.

Keywords: temperature, Multiple-Point’s Measure, Micro Controller Unit, DS18B20