基于單片機(jī)的溫度采集系統(tǒng)的設(shè)計(jì)
目 錄
摘 要 II
Abstract III
1 引言 1
2 緒 論 3
2.1 問題的提出 3
2.2 設(shè)計(jì)目的及系統(tǒng)功能 3
3 第二章 硬件電路設(shè)計(jì) 4
3.1 硬件設(shè)計(jì)思路 4
3.2 總體設(shè)計(jì)框圖 4
3.3 單元電路設(shè)計(jì) 4
3.3.1 89C51單片機(jī) 4
3.3.2 溫度采集及調(diào)理電路 5
3.3.3 鍵盤及數(shù)碼管顯示電路 8
3.3.3.1 LED顯示器 8
3.3.3.2 7279可編程鍵盤顯示器接口芯片 8
4 第三章 軟件設(shè)計(jì) 9
4.1 程序流程圖設(shè)計(jì) 9
4.2 程序設(shè)計(jì) 15
4.2.1 A/D轉(zhuǎn)換 15
4.2.2 鍵盤及數(shù)碼管顯示 15
4.3 調(diào)試與測試 19
5 結(jié)論 20
6 參考文獻(xiàn) 1
附錄：程序清單 3

摘 要
近年來，單片機(jī)以其功能強(qiáng)、體積小、使用方便、性能價(jià)格比高等優(yōu)點(diǎn),在實(shí)時(shí)控制、自動(dòng)測試、智能儀表、計(jì)算機(jī)終端、遙測通訊、家用電器等許多方面得到了廣泛的應(yīng)用。
本設(shè)計(jì)采用單片機(jī)89C51作為控制核心，對多點(diǎn)溫度進(jìn)行采集。通過集成溫度傳感器AD590將溫度值轉(zhuǎn)換為電量輸出。由ADC0809實(shí)現(xiàn)模擬信號(hào)的數(shù)字化。同時(shí)，外接可編程鍵盤顯示器接口芯片7279通過小鍵盤實(shí)現(xiàn)多點(diǎn)溫度值的切換顯示；可以利用小鍵盤設(shè)定溫度的最大值和最小值，對于超過最大值或低于最小值的溫度數(shù)據(jù)通過揚(yáng)聲器進(jìn)行報(bào)警。
關(guān)鍵詞：單片機(jī)；溫度采集；報(bào)警
Abstract
Recently, SCM (Single Chip Micyoco) is widely used in real-time control, automatism testing, computer terminal, remote communication, home appliances by strong function, small bulk, used convenient and high capability-price ratio.
This design adopts SCM89C51 by way of controlling core; it can gather several different temperature signals. Through the integration temperature sensor A/D590, it converts temperature value to electricity signal; and then switches the analog signals for digital signals by ADC809. At the same time, the programmable keyboard/display port chip7279 can display the different temperature value. It also can enactment the maxim and minimum temperature value by the small keyboard. When the gathered temperature value exceeds the maxim and minimum value, the system will give an alarm through the speaker.
Key words: SCM; temperature gathering; alarm