【正文】 1 院級電子設計技能競賽 課題名稱 基于液晶 1602 單片機 智能 溫度 檢測 系統(tǒng) 系 別 信息工程學院 專 業(yè) 電子信息工程 班 級 13 電子應用 班 學 號 1332651143 學生姓名 楊源鑫 指導教師 侯繼紅 完成日期 2020 年 6 月 15 日 廣州科技貿易職業(yè)學院教務處制 2 摘要 隨著時代的進步和發(fā)展，溫度的測試已經(jīng)影響到我們的生活、工作、科研、各個領域，已經(jīng)成為了一種非常重要的事情，因此設計一個溫度測試的系統(tǒng)勢在必行。 本文主要介紹了一個基于 液晶 1602 單片機智能溫度檢測系統(tǒng) 。詳細描述了利用數(shù)字溫度傳感器 DS18B20 開發(fā)測溫系統(tǒng)的過程，重點對傳感器在單片機下的硬件連接，軟件編程以及各模塊系統(tǒng)流程進行了詳盡分析，對各部分的電路也一一進行了介紹，該系統(tǒng)可以方便的實現(xiàn)溫度的采集和報警，并可以根據(jù)需要任意上下限報警溫度，它使用起來相當方便，具有精度高、量程寬、靈敏度高、體積小、功耗低等優(yōu)點，適合于我們日常生活和工、農業(yè)生產中的溫度測量，也可以當做溫度處理模塊潛入其他系統(tǒng)中，作為其他主系統(tǒng)的輔助擴展。 DS18B20 與 AT89S51 結合實現(xiàn)最簡溫度報警系統(tǒng)，該系統(tǒng)結構簡單，抗干擾能力強， 適合于惡劣環(huán)境下進行現(xiàn)場溫度測量，有廣泛的應用前景。 關鍵詞：單片機；溫度檢測； AT89C52。DS18B20。 abstract As the progress and development of The Times, temperature test has impact to our life, work, scientific research, each domain, has bee a very important thing, so the design of a temperature testing system is imperative. This paper introduces a detection system based on liquid crystal 1602 single chip microputer intelligent in detail using digital temperature sensor DS18B20 temperature measurement and control system in the development process, focusing on sensor under the single chip microputer hardware connection, software programming and the flow diagram of each module system are analyzed in detail, on the part of the circuit are introduced one by one, the system can easily realize the collection of temperature and alarm, and can according to need any upper and lower alarm temperature, it is quite convenient to use and has high precision, wide range, high sensitivity, small volume, low power consumption, suitable for our daily life and the temperature measurement in industrial and agricultural production, also can treat as temperature processing module into other systems, as an aid in the extension of other main with AT89S51 realize the minimalist temperature alarm system, the system structure is simple, strong antijamming capability, suitable for harsh environments onsite temperature measurement, have broad application prospects. Key words: single chip microputer。Temperature detection。. 3 目錄 摘要 ............................................................................................................................................. 2 基于液晶 1602 單片機智能溫度檢測系統(tǒng) .................................................................................... 4 1 系統(tǒng)方案 ................................................................................................................................... 4 液晶 LCD1602 的選擇 ....................................................................................................... 4 溫度傳感器 DS18B20 的選擇 ............................................................................................ 6 DS18B20 封裝形式及引腳功能 ................................................................................... 7 DS18B20 供電方式 ..................................................................................................... 9 DS18B20 的測溫原理 .................................................................................................10 DS18B20 的 ROM 命令 .................................................................................................12 串口通信模塊的選擇 .........................................................................................................13 串口收發(fā)數(shù)據(jù)概述： ................................................................................................14 LED 顯示模塊和 蜂鳴器報警模塊的選擇 ...........................................................................14 2 電路與程序設計 .......................................................................................................................15 電路的設計 ........................................................................................................................15 系統(tǒng)總體框圖 .............................................................................................................15 程序的設計 ........................................................................................................................16 程序功能描述 .....................................................................................