摘要摘要近年数据采集系统的应用范围越来越多、所涉及到的测量信号和信号源的类型越来越宽、对测量的要求也越来越高。国内现在已有不少数据测量和采集的系统，但很多系统存在功能单一、采集通道少、采集速率低、操作复杂、并且对测试环境要求较高等问题。人们需要一种应用范围广、性价比高的数据采集系统。基于单片机的多通道数据采集系统是将来自传感器的信号通过放大、输入A/D转换器转换为数字信号后由单片机采集，、后期处理与显示，实现了数据处理功能强大、显示直观、界面友好、性价比高、应用广泛的特点，可广泛应用于工业控制、仪器、仪表、机电一体化、智能家居等诸多领域。关键词：多通道；数据采集；单片机；通信；ABSTRACTABSTRACTNowadays，withtheTheapplicationrageofdataacquisitionsystemisbecomingwideincreasingly,thetypesofmeasurementsignalandsignalsourcearealsomoreandmore,Surveyorsalsorequiremuchhighermeasurerequirements.Domesticnowhavealotofdateacquisitionandmeasuresystems,buttherearemanysystemsinvolvingtheseissues:singlefunction,lesscollectionaccess,lowcollectionrate,highdemandsofcollectiontestenvironmentandsoon.Sopeoplerequireabroadscopeofapplication,highreliabilityandlow-costdataacquisitionsystem.Multi-channelacquisitionsystembasedonSCMcanprocesssignalfromsensorbyamplification,linerfiltering.Afterprocessingmaintainsynchronoussampling,whichconvertedtodigitalsignalinputA/DconversionbySCMAcquisition,processedanddisplayed.Soawiderangeoffeaturescanbewidelyusedinindustrialcontrolequipment,instruments,andelectricalengineeringintegration,intelligenthomeandmanyotherfields.Keywords:Multi-Channel;Dataacquisition;MCU;Communication;PAGEii目录PAGEi目录目录TOC\o"1-3"\h\uHYPERLINK\l_Toc5753第一章绪论PAGEREF_Toc57531HYPERLINK\l_Toc30881.1多通道数据采集的研究背景PAGEREF_Toc30881HYPERLINK\l_Toc290761.2数据采集系统的应用PAGEREF_Toc290762HYPERLINK\l_Toc9321.3数据采集系统组成PAGEREF_Toc9323HYPERLINK\l_Toc1357第二章系统硬件设计PAGEREF_Toc13575HYPERLINK\l_Toc65762.1系统原理电路设计PAGEREF_Toc65765HYPERLINK\l_Toc34862.2模块及器件工作原理PAGEREF_Toc34866HYPERLINK\l_Toc263672.2.1单片机模块PAGEREF_Toc263677HYPERLINK\l_Toc87182.2.2单片机最小系统PAGEREF_Toc871810HYPERLINK\l_Toc100442.2.3A/D模数转换模块PAGEREF_Toc1004411HYPERLINK\l_Toc43092.2.4LED显示模块PAGEREF_Toc430914HYPERLINK\l_Toc215182.2.5电源供电模块PAGEREF_Toc2151815HYPERLINK\l_Toc20562