南京信息职业技术学院毕业设计论文作者陈龚学号10619s34系部电子信息工程系专业电子信息工程技术/电子商务题目小型仓库温湿度监测系统指导教师丁宁评阅教师徐瑞亚完成时间：2010年4月10日毕业设计(论文)中文摘要小型仓库温湿度监测系统摘要：仓库内要实现温湿度的精确控制必须进行多点测量。基于这一要求，本文采用多个数字温湿度传感器SHTll来设计仓库监测系统，以达到简化软硬件系统设计，提高测量精度的目的。首先介绍了SHTll的结构特点、接口电路和工作时序，然后确定了采用多个SHTll纽成的温湿度测量系统的软硬件设计方案，最后基于AT89S51单片机设计了电路简洁、大大节省I/O口资源、具有现场独立显示和远距离通信功能的多点温湿度测量系统，并编写了PC机端直观的数据观测界面程序，为现代化仓库的集中管理提供了条件。关键词：SHT11；AT89S51；串口通信；仓库温湿度监测系统毕业设计(论文)外文摘要Title:SmallStorageTemperature&HumidityMonitoringSystemAbstract：Multi—pointsmonitoringisnecessaryforstorageexacttemperature&humiditycontrollingsystem．Forthisreason，weuseseveraldigitaltemperature&humiditysensorstodesignthestoragemonitoringsystem，Itcanmakethesoftwareandhardwaredesigningeasierandthemeasuringprecisionhigher．Firstly，thepaper，introducesSHTl1’sstructurecharacters，I/Oconnectingcircuitandworkingschedule．Theschemethathowtodesignthesoftwareandhardwareoftemperature&humiditymeasuringsystembyusingseveralSHTl1ispresented．Initially，Atemperature&humiditymeasuringsystembasedonAT89S51isdesigned．Theadvantagesofthesystemaresimplehardware，lessI/Oresource，self—displayingandlongdistancecommunication．Furthermore，AdataobservationinterfaceinthePCterminalisprogrammed，whichcanprovideAgoodconditionforconcentrativemanagementofmodernstorage．Keywords:SHTll；AT89S51；Connectiontoserialinterface；StorageTemperature&HumidityMonitoringSystem目录一、引言............................................................51.1设计目的......................................................51.2设计要求......................................................5二、系统总体设计....................................................62.1信号采集......................................................62.1.1温湿度传感器...............................................72.1.2SHT11性能特点.............................................72.1.2SHT11的功能管脚及实物.....................................82.1.3SHT11内部结构和工作原理...................................92.1.5硬件设计..................................................92.1.6软件设计.................................................112.2单片机AT89S51...............................................162.2.1单片机AT89S51的结构及组成...............................172.2.2单片机AT89S51的引脚.....................................182.2.3存储器..................................................212.2.4Flash闪速存储器的编程..................................232.2.5单片机最小系统的硬件电路.................................282.3通信模块.....................................................292.3.1RS-232、RS-485及其接口电路...............................302.3.2串口的基本接线方法.......................................322.4电源模块.....................................................332.4.1芯片LM7805...............................................332.5硬件设计综述.................................................34三、软件设计.......................................................353.1AT89S51软件设计.............................................3...
