基于單片機的數字式溫度計設計

電子機電附開題報告,論文字數:9307,頁數:36  論文編號:JD481

目   錄

一、緒論 6
1.1選題背景 6
二、總體設計方案 8
2.1數字溫度計設計方案論證 8
2.2方案二的總體設計框圖 8
三、系統整體硬件電路 9
3.1主板電路 9
3.2顯示電路 9
3.3 DS18B20溫度傳感器與單片機的接口電路 10
3.4 AT89C2051單片機介紹 10
3.5 溫度傳感器DS18B20功能介紹 13
四、數字溫度計的程序流程圖及程序設計 16
4.1主程序設計流程圖 16
4.2讀出溫度子程序設計流程圖 17
4.3溫度轉換命令子程序設計流程圖 17
4.4計算溫度子程序設計流程圖 17
4.5顯示數據刷新子程序設計流程圖 18
4.6程序清單 19
五、總結 32
六、附錄 33
6.1 Protel電路總圖 33
6.2 PCB布線圖 34
6.3 設計中所需要的器件清單 34
致謝 35
參考文獻 36

功能要求
數字式溫度計要求測溫范圍在-50到110度，精度誤差在0.1度以內，4位LED數碼管直讀顯示。

【摘要】：單片機在日用電子產品中的應用越來越廣泛，溫度則是人們日常生活中常常需要測量和控制的一個量。本設計采用AT89C2051單片機和溫度傳感器DS18B20從硬件和軟件兩方面介紹了一款簡易數字溫度計的設計過程， 并對硬件原理圖和程序流程圖作了簡潔的描述。數字溫度計與傳統的溫度計相比，具有讀數方便，測溫范圍廣，測溫準確，其輸出溫度采用數字顯示，主要用于對測溫比較準確的場所。
【關鍵詞】單片機AT89C2051；溫度傳感器DS18B20；驅動器74HC244

Abstract:Monolithic integrated circuit's is getting more and more widespread in everyday use electronic products application, the temperature is a quantity which in the people daily life needs to survey and to control frequently. This design used at89C2051 monolithic integrated circuit and temperature sensor DS18B20 introduced from the hardware and the software two aspects a section of simple digital thermometer's design process, and has made the succinct description on the hardware schematic diagram and the program flow diagram. The digital thermometer and the traditional thermometer compares, has the reading to be convenient, the temperature measurement scope is broad, the temperature measurement is accurate, its output temperature uses the digit to demonstrate, mainly uses to the temperature measurement quite accurate place.
Key words: Single-chip AT89C2051; temperature sensor DS18B20; drive 74HC24