节水灌溉智能控制系统设计.doc

LANZHOUUNIVERSITYOFTECHNOLOGY毕业设计题目节水灌溉智能控制系统设计学生姓名赵胜学号08220301专业班级自动化（3）班指导教师成娟娟学院电信工程学院答辩日期2012。6。12兰州理工大学毕业设计摘要节水灌溉智能控制技术的高低代表着农业现代化的发展状况，灌溉系统智能化水平较低是制约我国高效农业发展的主要原因。本文就此问题研究了单片机控制的节水灌溉系统，该系统对土壤的湿度进行监控，并按照作物对土壤湿度的要求进行适时、适量灌水，其核心是单片机通过采用PID算法对土壤湿度的控制部分,主要对灌溉控制技术及系统的硬件、软件编程各个部分进行了深入的研究.单片机控制部分采用AT89C51单片机为核心，主要由土壤湿度传感器，AD转换器，显示电路，输出控制电路，故障报警电路等组成;软件选用C语言编程。系统主要具有以下功能:单片机可根据土壤湿度传感器检测到的土壤湿度，自动控制灌溉系统，并且同时显示出当前土壤的湿度值。该系统灵活性强，易于操作，可靠性高，将会有更广阔的开发前景。关键词：节水灌溉；湿度传感器；单片机；自动控制AbstractThelevelofauto-controlwater—savingirrigationtechnologyreflectsthedevelopmentconditionofagriculturemodernization．Thelowautomaticlevelofirrigationsystemisthemainreasonthatpreventedouragriculture'sdevelopment．Astothiscondition，thispapermainlystudiesthedripwater-savingirrigationsystemthatcontrolledbyMCU（Micro—controllerUnit)．Thissystemcallsuperviseandcontrolmoistureofdifferentsoil．Itcanirrigatetodifferentfarmcorpswiththerightamountofwateratthewelltime．ItscoreistheMCUthroughtheuseofthePIDalgorithmforsoilmoisturecontrolsection．ResearchworkhandbeencarriedOiltotherelationshipbetweensoilmoistureandwater,irrigatecontroltechnology,hardwareandsoftwareprogramandsoon.Itadoptsthetopandbottomformtorealizethecontrolfunctionofdripirrigationsystem．BasedonAT89C5lMCU，thebottomhardwaresystemmainlyconsistsofsoilmoisturesensor，Signaltransfercircuit，monitordisplaycircuit，outportcontrolcircuit，malfunctiondisplaycircuitandtheprocedureprogrammedwithClanguage。PartofSCMAT89C51miscrocontrollerasthecore，mainlybythesoilmoisturesensors,ADconverter,displaycircuit,theoutputconfrolcircuit,thefaultalamcircuitandothercomponents；softwareselectionoftheCprogramminglanguage。Thesystemhasthefollowingfunctions:MCUcanbedetectedinsoilmoisturesoilmoisturesensorandautomaticcontrolofirrigationsystems，andalsoshowsthecurrentsoilmoisture。Thesystemisflexible，easyoperation，highreliability,therewillbemorebroadprospectsofdevelopment。Keywords:Water—savingirrigation;Humiditysensors；MCU（Micro—controllerUnit)；Automaticcontrol目录TOC\o"1—3”\h\z\uHYPE