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1、摘要虚拟仪器是在计算机基础上通过增加相关硬件和软件构建而成的、具有可视化界面的仪器,它融合了测试理论、仪器原理和技术、计算机接口技术、高速总线技术以及图形软件编程技术等于一体,利用计算机强大的数字的处理能力来实现仪器的诸多功能,打破了传统仪器的框架,形成了一种新的仪器模式。本文首先阐述了测控技术和虚拟仪器技术的现状及以后的发展趋势,探讨了虚拟仪器的相关技术、LabVIEW的相关知识,然后阐述了有关数据采集的理论,给出了数据采集系统的框图和硬件结构图。在分析本设计功能的基础上,介绍了程序模块化设计、数据库相关知识、Lab
2、VIEW的多线程等技术,最后给出了设计的前面板及程序框图。本设计采用了NI-PXI6281数据采集卡,利用虚拟仪器及其相关技术实现了多通道数据采集。该系统具有多路采集、实时显示、存储管理与密码保护等功能。关键词:虚拟仪器;数据采集;MySQL;LabVIEWAbstractVirtualinstrumentisbasedoncomputerrelatedhardwareandsoftwarebyincreasingthebuildingmadewithavisualinterfaceoftheinstrument,wh
3、ichcombinesthetesttheory,theoryandtechnologyequipment,computerinterfacetechnology,high-speedbustechnologyandgraphicssoftwareprogrammingtechnologyisequaltoone,theuseofpowerfuldigitalcomputerprocessingpowertoachievetheinstrument'smanyfeatures,breakingthetraditiona
4、linstrumentsoftheframework,theformationofanewinstrumentmodel.Thispaperdescribesthemeasurementandcontroltechnologyandvirtualinstrumenttechnologystatusandfuturedevelopmenttrendofrelatedtechnologyofvirtualinstrument,LabVIEWrelatedknowledge,andthenexpoundedonthetheo
5、ryofdataacquisition,dataacquisitionsystemisgivenandthehardwareblockdiagramstructure.Intheanalysisofthedesignfeatures,basedontheproceduresintroducedmodulardesign,database-relatedknowledge,LabVIEWmultithreadingtechnology,giventhedesignfrontpanelandblockdiagram.Thi
6、sdesignusesavirtualNI-PXI6281dataacquisitioncard,theuseofvirtualinstrumentsandrelatedtechnologytoachieveamulti-channeldataacquisition.Thesystemhasmulti-channelacquisition,display,storagemanagementandpasswordprotection.Keywords:VirtualInstrument,DAQ,MySQL,LabVIEW
7、目录摘要.............................................................................................................................IABSTRACT..................................................................................................................II第1章绪论...
8、...............................................................................................................11.1课题来源及研究的目的和意义......................................
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