西华大学课程设计说明书多通道智能湿度测试仪设计摘要：本文提出了一个多通道智能湿度测试仪的设计方案,其控制系统以AT89C2051单片机为控制核心，结合传感器、通讯和数字电子电路技术，实现了湿度检测和湿度的有效控制。它由湿度传感器，转换处理和指示部分构成，但它的转换处理部分，是由多频时钟电路、中央处理单元、地址锁存器、程序存储器、A/D变换器、显示器并行接口电路连接成的微机，指示装置是由数码显示电路和湿度综合状态灯光指示速查图构成的显示屏。它检测精度高，可测参数多，能准确地综合反映湿度的变化,可以测量多路湿度，结果以LCD进行数字显示，当湿度超过所限定的范围可自动报警，通过RS232可将单片机的数据送至PC机做数据的综合处理和分析。关键词：湿度检测，A/D，AT89C51，LED，RS232Abstract:Thispaperproposesamulti-channelintelligenthumiditytester,thedesignofthecontrolsystemofsinglechipmicrocomputerAT89C2051toascontrolcore,combiningsensor,communicationanddigitalelectroniccircuittechnology,realizethehumiditydetectionandhumiditycontrol.Itconsistsofhumiditysensor,converttheprocessingandinstructionspart,butit'sconversionprocessing,ismorefrequencyclockcircuit,bythecentralprocessingunit,addresslatches,programmemory,A/Dconverter,displayinterfacecircuitconnectedintoparallelthemicrocomputer,indicatingdeviceisAdigitaldisplaycircuitandhumiditycomprehensivestatelightSuZhafigureinthecompositionofthedisplayscreeninstructions.Ithighaccuracy,canbemeasuredparameters,canaccuratelyreflectthechangeofcomprehensivehumidity,canmeasuremulti-channelhumidity,theresultsareLCDdigitaldisplay,whenhumiditymorethanthescopeofthedefinedautomaticalarm,throughRS232willbesenttothesinglechipmicrocomputerdataPCdodataprocessingandanalysisofcomprehensive.Keywords:HumidityMeasurement,A/D,AT89C51,LED,RS232第PAGEI页目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc170892311"1前言PAGEREF_Toc170892311\h1HYPERLINK\l"_Toc170892312"2整体方案设计PAGEREF_Toc170892312\h2HYPERLINK\l"_Toc170892313"2.1方案论证PAGEREF_Toc170892313\h2HYPERLINK\l"_Toc170892314"2.2方案比较PAGEREF_Toc170892314\h3HYPERLINK\l"_Toc170892315"3单元模块设计PAGEREF_Toc170892315\h4HYPERLINK\l"_Toc170892316"3.1控制电路设计PAGEREF_Toc170892316\h4HYPERLINK\l"_Toc170892318"3.2湿度检测电路设计PAGEREF_Toc170892318\h53.3通信电路设计5HYPERLINK\l"_Toc170892320"3.4显示电路设计5HYPERLINK\l"_Toc170892320"3.5键盘电路设计7HYPERLINK\l"_Toc170892320"3.6RS232原理8HYPERLINK\l"_To