基于LabVIEW的多通道数据采集系统(毕业论文)

内蒙古科技大学本科生毕业设计说明书（毕业论文）题目：基于LabVIEW的多通道数据采集系统学生姓名：蒋林峰学号：200440503114专业：测控技术与仪器班级：测控2004级-1班指导教师：肖俊生内蒙古科技大学毕业设计说明书（毕业论文）I摘要虚拟仪器是将仪器技术、计算机技术、总线技术和软件技术紧密的融合在一起，利用计算机强大的数字处理能力实现仪器的大部分功能，打破了传统仪器的框架，形成的一种新的仪器模式。本设计采用NIPCI-6221数据采集卡，运用虚拟仪器及其相关技术于多通道数据采集系统的设计。该系统具有数据同时采集、采集数据实时显示、存储与管理、报警记录等功能，最后使用Web技术实现了采集数据的远程访问。本文首先概述了测控技术和虚拟仪器技术在国内外的发展及以后的发展趋势，探讨了虚拟仪器的总线及其标准、框架结构、LabVIEW开发平台，然后介绍了数据采集的相关理论，给出了数据采集系统的硬件结构图。在分析本系统功能需求的基础上，介绍了程序模块化设计、数据库、Web、多线程等设计中用到的技术，最后一章给出了本设计的前面板图。本设计是虚拟仪器在测控领域的一次成功尝试。实践证明虚拟仪器是一种优秀的解决方案，能够高效的实现各种测控任务。关键字：虚拟仪器；数据采集；MySQL；PHP；LabVIEW内蒙古科技大学毕业设计说明书（毕业论文）IIAbstractVirtualinstrument(VI)iscombinescomputerscience,bustechnology,softwareengeneeringwithmeasurementinstrumentationtechology,employesthecomputer'spowerfuldigtalprocesscompabilitytorealizemainfunctionofinstrument.Itbreakesthemainframeoftraditonalinstrumentandforgesanewinstrumentpattern.ThisprojectuseNIPCI-6221DAQ(dataacquisition)card,ingeniouslyapplyesVItechnologyinthedevelopmentofaMulti-channeldataacquisitiondevelomentandfinallyachievesasolutionwhichcanprovidemanyfunctionsincludingmulti-channelandmulti-parametersignalacquisition,hugemeasurementinformationstorageandmanagement,Alarmrecord,andCollectingdatashowthatreal-time.FinallytheuseofWebtechnologytoachievetheAcquisitionofdataremoteaccess.ThispaperIntroducedindetailthetesttechnologyinthedomesticandforeigndevelopmentandthelatertrendofdevelopment,thenintroducedthevirtualinstrument'sdevelopment.StudyandreseachdeeplyVI'sconcept,hardwareconfigurationandsoftwarearchitechture.Thenintroducethedevelopmentplatform--LabVIEW.Introducedthetheoryofdataacquisition,whichelaboratedontheacquisitionofhardware,theinputsignalconditioning,giventheDAQsystemstructureofthehardware.BasedontheanalysisoftheDAQsystemonthebasisoffunctionalrequirements,describedindetailthedesignusedinsomesoftware-relatedtechnologies,includingproceduresmodulardesign,databasetechnology,Webtechnology,multi-threadedtechnology.Thefinalchaptergiventhespecificdesignofthefontpanel.ThisprojectisasuccessfulapplicationofVIinmeasurementdomain,whichtestifiesthatVIisanavailableandeffectivesolutionandcanbeemployedtoaccomplishmajority内蒙古科技大学毕业设计说明书（毕业论文）IIIcomplicatedmeasurementtask.Keywords:VirtualInstrument;DAQ;MySQL;PHP;LabVIEW内蒙古科技大学毕业设计说明书（毕业论文）IV目录摘要.............................................................................................................................................IAbstract......................................................................................................................................II目录..........................................................................................................................................IV第一章绪论..............................................................................................................................11.1引言.............................................................................................................................11.2课题背景.....................................................................................................................11.2.1测控技术的国内外发展现状..........................................................................11.2.2虚拟仪器技术发展趋势..................................................................................31.3本设计所做的工作.....................................................................................................51.3.1多通道数据采集系统的设计..........................................................................51.3.2远程数据检索的设计......................................................................................6第二章虚拟仪器......................................................................................................................72.1虚拟仪器技术概述.....................................................................................................72.1.1虚拟仪器的概念..............................................................................................72.1.2虚拟仪器的特点及优势..................................................................................72.1.3虚拟仪器和传统仪器的比较..........................................................................82.1.4虚拟仪器测试系统的组成............................................................................102.1.5虚拟仪器I/O接口设备.................................................................................112.1.6虚拟仪器的软件结构....................................................................................132.2虚拟仪器的开发软件...............................................................................................132.2.1虚拟仪器的开发语言....................................................................................132.2.2图形化虚拟仪器开发平台——LabVIEW....................................................14内蒙古科技大学毕业设计说明书（毕业论文）V2.2.3基于LabVIEW平台的虚拟仪器程序设计..................................................15第三章系统设计理论及硬件平台的实现............................................................................173.1PC机.........................................................................................................................