w(定稿胡海瑞)盆花自动浇水系统的设计

单位代码：005分类号：TP29延安大学西安创新学院本科毕业论文（设计）题目：盆花自动浇水系统的设计专业：电子信息工程姓名：胡海瑞学号：0903024118指导教师：杨延宁毕业时间：二零一三年六月I盆花自动浇水系统的设计摘要：设计了一款智能浇水系统，以实现花卉的自动浇水。本次设计的盆花自动浇水系统分为两大模块：空气温湿度的检测与控制和实时时间的显示与定时控制。其中空气温湿度的检测与控制部分又分为空气温湿度的检测和显示、自动浇水系统。空气温湿度的检测和显示以温湿度传感器DHT11为感应部件，将检测到的空气温湿度值送入STC89C51单片机，再将其数值输出到LCD液晶显示屏上显示。并通过单片机程序设定浇水的上下限值与DHT11送入单片机的空气湿度值相比较，当低于下限值时，单片机输出一个信号控制电磁阀打开，开始浇水，高于上限值时由单片机输出一个信号控制电磁阀关闭，停止浇水。实时时间的显示与定时控制是由单片机从时钟芯片DS1302读入时间与每天的实时时间，通过程序设定的定时浇水的时间与浇水的量进行浇水。关键词：STC89C51单片机；DHT11温湿度传感器；LCD；DS1302时钟芯IIDesignofpottedflowersautomaticwateringsystemAbstract:Thedesignofanintelligentwateringsystem,torealizetheautomaticwateringflower.Pottedplantautomaticwateringsystemofthisdesignisdividedintotwomodules:theairtemperatureandhumiditydetectionandcontrolandreal-timedisplayandtimingcontrol.Thedetectionandcontrolofairtemperatureandhumidityisdividedagainfordetectionofairtemperatureandhumidityanddisplay,automaticwateringsystem.DetectionofairtemperatureandhumidityanddisplayoftemperatureandhumiditysensorDHT11asthesensingcomponent,airtemperatureandhumiditywilldetectthevalueintotheSTC89C51microcontroller,andthendisplaythenumericaloutputtoLCDLCDscreen.AndthroughtheMCUprogramsettheupperandlowerlimitsofwatercomparedtoairhumidityandDHT11intothesinglevalue,whenlessthanthelowerlimit,theSCMoutputasignaltocontroltheelectromagneticvalveisopened,thebeginningofwatering,higherthanthelimitvaluebySCMoutputsasignaltocontroltheelectromagneticvalveisclosed,stopwatering.TherealtimedisplayandtimingcontrolbytheSCMfromthereal-timeclockchipDS1302readandtimeofday,timeandwateringwateringthemthroughtheprogramsettingtheamountofwatering.Keywords:STC89C51;DHT11temperatureandhumiditysensor;LCD;DS1302clockcoreIII目录1.绪论.....................................................................................................................................................11.1选题的目的与意义..................................................................................................................11.2自动浇花器目前的发展现状..................................................................................................11.3设计方案..................................................................................................................................12.系统的总体设计.................................................................................................................................32.1应用场所.................................................................................................................................32.2系统预期功能.........................................................................................................................32.3系统总体设计方案.................................................................................................................32.3.1主题分类......................................................................................................................32.3.2.流程图.........................................................................................................................33.系统的核心器件.................................................................................................................................53.1STC89C51单片机....................................................................................................................53.1.1STC89C51的内部结构................................................................................................53.1.2STC89C51单片机引脚功能........................................................................................63.1.3单片机存储器结构......................................................................................................63.2DHT11数字温湿度传感器......................................................................................................73.2.1DHT11的性能指标和特性..........................................................................................83.2.2DHT11的引脚说明......................................................................................................83.3DS1320时钟芯片....................................................................................................................83.3.1DS1302的性能指标和特性........................................................................................83.3.2DS1302的引脚说明....................................................................................................83.3.2DS1302的控制字节....................................................................................................93.4LCD1602液晶显示屏..............................................................................................................93.4.1LCD液晶显示器简介..................................................................................................93.4.2液晶显示的主要技术参数.........................................................................................93.4.3LCD1602的引脚说明................................................................................................104.系统的硬件电路设计.............................................................................................