1、基于單片機的數字溫度計的設計摘要本文描述了基于AVR，51單片機和溫度傳感器等器件設計的數字溫度計電路的設計原理和實現方法。運用主從分布式的思想，由一臺上位機、一臺下位機構成多點溫度數據采集系統，組成兩級分布式多點溫度測量的巡回檢測系統，系統采用串行通信標準，通過上位機控制下位機進行現場溫度采集，溫度值既可以送回主控機PC進行數據處理，由顯示器顯示，也可以由下位機單獨操作，實時顯示當前各點的溫度值，對各點進行控制。硬件包括：電源電路、顯示電路、溫度測試電路，報警電路，串行通信電路等。系統最大特點在于其軟件設計使用層次化、模塊化設計方法。經調試和測試，系統各項性能指標參數完全達到設計指標。系統采

2、用C語言進行編程，易于維護和修改。方案介紹了數字溫度計系統的整體功能；其次介紹了各個模塊的硬件模塊電路設計，說明了相應元器件的選擇和應用，闡述了各部分控制原理和軟件調試。關鍵詞 ： AVR；多點采集；無線傳輸 Based on the design of single chip digital thermometerAbstractThis paper describes the temperature sensor based on AVR ，51 microcontroller and other devices designed digital thermometer circuit d

3、esign principles and implementation. Thought the use of master-slave distributed by a stage crew, multi-point temperature lower machine data collection, composed of two distributed multi-point temperature measurement circuit detection system, the system uses a serial communication standard, through

4、the PC bit machine under the control of scene temperature acquisition, temperature returned to the host computer either PC for data processing, the display can also be a separate operation from the next-bit machines, real-time displays the current temperature value of each point on the control point

5、s. Hardware includes: power supply circuit, display circuit, temperature testing circuit, alarm circuit, the serial communication circuit. Most important feature of the system software designed for use in its hierarchical, modular design, simple mathematical model and control algorithm was able to s

6、implify and speed development. The debugging and testing, system performance parameters fully meet the design specifications. System uses the C programming language, easy to maintain and modify. Program introduces the system's overall function digital thermometer; next introduced each module har

7、dware circuit design, describes the selection and application of the corresponding components, describes the various parts of control theory and software debugging. key words：AVR；Multi-point acquisition；Wireless目 錄論文總頁數：34頁目錄11 引言11.1課題背景及意義11.2國內外的研究現狀11.3課題的研究內容11.4課題的研究目的12 系統的方案設計與選擇12.1上位機電源模塊論證與選擇12.2 LCD顯示模塊方案論證與選擇22.3 按鍵模塊方案論證與選擇22.4 溫度采集模塊方案論證與選擇22.5上位機和下位機無線通信模塊選擇33 硬件模塊設計33.1上位機硬件電路設計33.1.1上位機電源設計33.1.2 FYD12864液晶顯示模塊設計43.1.3系統時鐘芯片設計63.1.3按鍵及其報警模塊93.1.4無線模塊103.2下位機硬件設計113.2.1下位機主控器設計113.2.2溫度傳感器設計133.2.3無線模塊設計174 系統軟件模塊設計184.1上位機的軟件流程圖184.3下位機的軟件流程圖185 調試19結 論20參考文獻21致 謝22聲 明23附錄