基于STC89C52单片机的数字温度计单片机课程设计.doc

单片机课程设计报告 项目名称 专业班级 学生姓名 指导教师 年月 日 摘要 Abstract With the progress and development of this epoch ,Single-chip Microcomputer (SCM ) technology has spread into various fields ---our lives ,work ,scientific researches and so on ,becoming a comparatively mature technology .This article was mainly written to introduce a temperature measurement system(TMS ) based on STC89C52 SCM .It’s with a detailed description of the development progress of TMS using digital temperature sensor ,putting emphasis on analyzing the hardware connection of the sensor under the SCM ,software programming and each module progress .This system can conveniently achieve the temperature data collection and display ,and can be arbitrarily set upper and lower alarm temperature .It’s quite easy to use ,with high accuracy ,wide range ,high sensitivity ,small size ,low power dissipation ,etc .Thus ,it’s suitable for our daily life and industrial and agricultural production’s temperature measurement ,and also can be used as temperature processing modules embedded in other systems ,as an auxiliary expansion of other main systems .Experimental results show that ,the integration of DS18B20 and STC89C52 can achieve the simplest TMS ，which has simple structure ,strong anti-jamming capability ,suitable for conducting in-situ temperature measurement ,all above leading this to have broad prospects of applications . Keywords: Temperature measurement ; Single-chip Microcomputer (SCM ) ; Digital Temperature sensor; Temperature data collection 目 录 摘要 I II 第1章 绪论 1 1.1 背景 1 1.2 数字温度计的设计目的 1 1.3 本文研究的意义 1 第2章 系统硬件选择 2 2.1 单片机的选择 2 2.1.1 STC89C52单片机的性能介绍 2 2.1.2 STC89C52单片机引脚图 2 2.2. 温度传感器的选择 4 2.2.1 DS18B20 介绍 4 第3章 原理分析 6 3.1原理框图 6 3.2原理分析 6 第4章 系统的硬件电路设计 7 4.1 显示电路 7 4.2报警电路 7 4.3 数字温度传感器 7 4.4单片机最小系统电路 8 4.5数字温度计的实物