必威体育精装版蔬菜公司恒温库微机监控系统.doc

郑州航空工业管理学院 毕 业 论 文（设 计） 2013届 电气工程及其自动化 专业 1106971 班级 题 目 蔬菜公司恒温库微机监控系统 姓 名 张宁 学号 110697137 指导教师 何琳琳 职称 副教授 二ОО 年 月 日 蔬菜公司恒温库微机监控系统 摘 要 Microcomputer monitoring system of constant temperature storehouse in vegetable company ABSTRACT In modern times,with the development of agriculture and its large size,traditional temperature control measures showed great limitations.Therefore,the microcomputer monitoring system of constant temperature storehouse appeared in modern vegetable management.It plays an important role in ensuring the quality of the vegetable and reducing the loss of vegetable.Under the guidance of government and market,constant temperature storehouse will develop normative,eliminate those do not meet the requirements of energy-saving emission reduction and sustainable development strategy, becomes more and more mature. This design mainly expounds the design principle of microcomputer monitoring system of vegetable companys constant temperature storehouse.Its based on AT89C51 single chip microcomputer and including the main circuit design and software design.This system uses AT89C51 as the temperature controller,it can make the storehouses temperature controlling in the error range that the setting point allowed.At the same time uses digital temperature sensor DS18B20, sampling of the temperature. The display part uses 4 LED digital tube and a dynamic scan mode to realize the temperature display.Besides,it also designs limits.When the temperature exceeds the set point,it will alarm. KEY WORDS:constant temperature storehouse;AT89C51;DS18B20;single chip microcomputer;sensor;LED display 目 录 前 言 3 第一章 蔬菜公司恒温库微机监控系统概述 5 1.1 蔬菜公司恒温库微机监控系统的目的 5 1.2 蔬菜公司恒温库微机监控系统的功能 6 第二章 总体设计方案 7 2.1 简述 7 2.1.1 实现的基本功能 7 2.1.2 技术参数 7 2.2 总体设计方案确定 7 2.2.1 系统框图 8 2.2.2 控制部分 8 2.2.3 显示部分 8 2.2.4 温度采集部分 9 第三章 系统硬件设计 10 3.1 单片机模块的设计 10 3.1.1 单片机的特性介绍 10 3.1.2 单片机的管脚介绍 11 3.2 温度采集系统的设计 13 3.2.1 DS18B20的主要特性 13 3.2