91基于LabVIEW的电子秤的设计研究

基于LabVIEW的电子秤的设计研究作者：张鹏飞摘要随着科学技术的进步，对测量技术的要求越来越高。电子测量技术在各个领域得到了越来越广泛的应用。传统的电子测量仪器由于其功能单一，体积庞大，己经很难满足实际测量工作中多样性、多功能的需要。以虚拟仪器为代表的新型测量仪器改变了传统仪器的思想，它们充分利用计算机强大的软硬件功能，把计算机技术和测量技术紧密结合起来，是融合了电子测量、计算机和网络技术的新型测量技术。特别是基于计算机平台的各种测量仪器由于成本低、使用方便等优点得到了更广泛的应用。本设计是结合传感器技术、数据采集技术和虚拟仪器技术开发设计了一种基于LabVIEW的电子秤，该系统采用普通PC机为主机,利用图形化可视测试软件LabVIEW为软件开发平台,将被测重量转换处理进行数据采集，实时进行处理、显示。关键词：电子秤；虚拟仪器；LabVIEWDesignoftheintelligentelectronicsteelyardbasedonLabVIEWAbstractWiththedevelopmentofscienceandtechnology,therequirementonmeasurementtechnologyisgettingmoreandmoreimportant.Theapplicationofelectronicmeasurementtechnologyhasextendedtomorefieldsthanbefore.Duetolimitedfunctionsandbigsize,traditionalelectronicmeasuringequipmentsarenolongersuitabletocommonpurposes.Therapiddevelopmentofintegratedcircuitandcomputertechnologygivesbirthtoanewkindofinstrument,VirtualInstrument(VI).Asaresult,thetestingcostincreasesbyawidemargin.Inrecentlyyears,anewmeasuretechnologythatcombinesthetechnologyofelectron,technologyofcomputer,technologyofnetwork,isdevelopedandthisnewtechnologyisnamedVI.Especiallyvariousmeasuringinstrumentsbasedoncomputer,theyaremorewidelyusedbecauseoftheirexcellencesuchas:lowercost,easilyused,etc.Thedesignofsensortechnology,dataacquisitiontechnologyandinstrumenttechnologydevelopmentanddesignaLabVIEW-basedelectronicsteelyard,thesystemusedforordinaryPC-host,theuseofgraphicvisualtestsoftwareforLabVIEWsoftwaredevelopmentplatform,theweightwillbetestedConversionprocessingofdataacquisition,real-timeprocessingthat.Keyword:Electronicssteelyard;Virtualinstrument;LabVIEW内蒙古科技大学毕业设计说明书（毕业论文）目录摘要.........................................................................................................................................IAbstract......................................................................................................................................II第一章引言............................................................................................................................11.1研究背景.....................................................................................................................11.1.1称重技术和衡器的发展..................................................................................11.1.2电子秤的发展状况..........................................................................................21.2本章小结.....................................................................................................................3第二章电子秤的功能、分类及现状......................................................................................42.1电子秤的系统构成及其使用功能.............................................................................42.2电子秤的分类.............................................................................................................52.3电子秤的现状.............................................................................................................52.4本章小结.....................................................................................................................8第三章虚拟仪器和LabVIEW简介........................................................................................93.1虚拟仪器.....................................................................................................................93.1.1虚拟仪器的发展史.........................................................................................103.1.2虚拟仪器的主要特点.....................................................................................123.1.3虚拟仪器的现状.............................................................................................133.1.4虚拟仪器的发展方向.....................................................................................133.2LabVIEW语言..........................................................................................................143.2.1LabVIEW使用的优势....................................................................................153.2.2LabVIEW的图形化程序设计........................................................................16内蒙古科技大学毕业设计说明书（毕业论文）3.2.3图形化的程序设计的步骤.............................................................................163.3本章小结...................................................................................................................18第四章基于LabVIEW的电子秤设计..................................................................................194.1电子秤的硬件设计...................................................................................................204.1.1传感器............................................................................................................204.1.2信号调理电路................................................................................................214.1.3数据采集........................................................................................................234.1.4PCI-6221数据采集卡.....................................................................................274.2电子秤的软件设计...................................................................................................294.2.1前面板界面设计..............