西安航空职业技术学院
毕 业 设 计（论 文）
论文题目：粮仓的温湿度检测及控制电路设计
所属系部：电子工程系
指导教师：丁欢 职 称：助教
学生姓名：刘瑞瑞 学 号: 07201204
专 业：应用电子技术
西安航空职业技术学院制
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西安航空职业技术学院
毕业设计（论文）任务书
题目： 粮仓的温湿度检测及控制电路设计
任务与要求：
通过变压器降压，在经过整流、滤波、稳压后，向温湿度检测及控制电 路提供电源，温湿度检测及控制电路根据周围的环境的温湿度变化，周 而复始的工作，保证粮仓的粮食的质量安全。
时间： 2009 年10月 5日 至2009 年 12月 21日 共 11 周 所属系部：电子工程系 学生姓名：刘瑞瑞 专业：应用电子技术 指导单位或教研室：应用电子教研室 指导教师： 丁欢
职 称：助教
西安航空职业技术学院制
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学 号：07201204 粮仓的温湿度检测及控制电路设计
摘要
每到粮食收获季节各粮仓的粮食收购及粮情检测工作压力巨大，如何进行粮食的现代化管理也是每一个储库点的重中之重，于是温湿度智能监控系统的研究与应用也日益迫切。粮食的温度和湿度是保证粮食安全储存的重要指标，本文针对粮仓的温湿度设计出一套控制系统，该系统根据环境要求与实用原则，能及时准确地测得粮堆各层面粮食的温度和湿度数据，并根据检测的数据对粮食储存情况进行分析和反馈，并生成合理的控制方案，实现自动化管理。
关键词：粮仓；温湿度；自动控制
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粮仓的温湿度检测及控制电路设计
Abstract
Summary of every grain harvest grain granary of food acquisition and tremendous work pressure on intelligence testing, how food is modern management point of each reservoir top priority, so temperature and humidity intelligent monitoring system for research and applications are increasingly urgent . Food, temperature and humidity to ensure the safe storage of food an important indicator of the breadbasket of this paper to design a set of temperature and humidity control system, which according to environmental requirements and practical principles, timely and accurately measured at all levels of food grain temperature of the heap and humidity data, and according to data detection and storage of food for analysis and feedback, and generate reasonable control program and achieve automated management. Keywords：barn; temperature and humidity; Automatic Control
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粮仓的温湿度检测及控制电路设计
目录
1选题背景及意义 .............................................................................................................................................1 1.1背景 ..........................................................................................................................................................1 1.2意义 ..........................................................................................................................................................1 2系统设计 ..........................................................................................................................................................2 2.1设计的任务和要求.................................................................................................................................2 2.1.1任务 ...................................................................................................................................................2 2.1.2 要求..................................................................................................................................................2 2.1.3 说明部分 .........................................................................................................................................2 2.2 总体方案设计 .........................................................................................................................................2 2.2.1 设计思路 .........................................................................................................................................2 2.2.2 系统的组成及设计原理分析 .....................................................................................................3 3电源电路 ..........................................................................................................................................................4 3.1 电源电路的基本知识 ............................................................................................................................4 3.1.1 变压器简介 ....................................................................................................................................4 3.1.2小功率整流滤波电路 .................................................................................................................5 3.1.3 稳压电路部分 ................................................................................................................................8 3.2 电源电路的设计 ...................................................................................................................................11 3.2.1 电源电路的组成..........................................................................................................................11 3.2.2 稳压电源的主要技术指标........................................................................................................11 3.2.3 电源电路图 ..................................................................................................................................12 4温度控制电路................................................................................................................................................17 4.1 元件介绍及选择 ...................................................................................................................................17 4.1.1 元件的介绍 ..................................................................................................................................17 4.1.2 元件的选择 ..................................................................................................................................17 4.2温度控制电路的设计 .........................................................................................................................18 4.2.1温度控制电路原理图 ................................................................................................................18 4.2.2 温度控制的原理..........................................................................................................................19 5湿度控制电路................................................................................................................................................24 5.1 元件介绍及选择 .................................................................................................................................24 5.1.1 元件介绍 .......................................................................................................................................24 5.1.2 元件的选择 ..................................................................................................................................23 5.2 湿度控制电路的设计 ..........................................................................................................................25 5.2.1 湿度控制电路原理图.................................................................................................................25 5.2.2湿度控制电路的工作原理 .......................................................................................................25 6常见故障诊断与处理 ..................................................................................................................................26 6.1 常见故障类型 ......................................................................................................................................26 6.1.1 常见的硬件故障..........................................................................................................................26 6.1.2常见的软件故障 .........................................................................................................................26 6.2故障诊断的基本方法 .........................................................................................................................26
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