搜索
基于Labview的温度测控系统设计——温度测控仪摘要现在人们主要使用传统仪器进行温度测量，传统仪器主要靠硬件来实现，开发费用高，数据也无法编辑。对于复杂的温度测试任务，利用传统仪器就难以实现对大量数据的处理与显示。而利用虚拟仪器，用户不仅可以实现较为复杂的温度测控任务，而且还可以根据自己的实际需要对系统中的参数进行定义，实现各种各样的测试要求。虚拟仪器不仅功能强大，而且使用时操作简单，设备维护改进的费用也很低。本次设计主要是利用NIPCI-6251数据采集卡、温度传感器来实现对温度数据的采集，通过USB口与计算机连接并使用Labview软件对数据进行分析处理，使该系统具备温度越界报警、实时数据显示、数据存储及历史数据查询等功能。论文主要介绍了温度测控系统软件部分的设计方案，包括数据采集、数据分析、数据存储显示与报警和温度调节五个模块，并且说明了各个模块的具体设计思路。关键词：数据采集卡，虚拟仪器，LabviewABSTRACTNowpeopleusetraditionalinstrumentsfortemperaturemeasurement,thetraditionalinstrumentmainlyusesthehardware,thedevelopmentcostshigh,thedatacannotbeedited.Forthetemperaturetesttaskcomplicatedbythetraditionalinstruments,itisdifficulttorealizeanddisplayoflargeamountsofdata.Andtheuseofvirtualinstrument,userscannotonlyrealizethetemperaturemeasurementandcontroltaskismorecomplex,butalsocanaccordingtotheiractualneedstodefinetheparametersinthesystem,toachieveavarietyoftestingrequirements.Virtualinstrumentisnotonlypowerful,andtheoperationissimple,equipmentmaintenanceimprovementcostsareverylow.ThisdesignismainlybasedonNIPCI-6251dataacquisitioncard,thetemperaturesensortorealizethecollectionoftemperaturedata,throughtheUSBportisconnectedwiththecomputerandanalyzedusingLabviewsoftwarefordataprocessing,sothatthesystemhastemperaturecross-borderalarm,real-timedatadisplay,datastorageandhistoricaldataquery.Thepapermainlyintroducesthedesignschemeoftemperaturemeasurementandcontrolsystemsoftware,includingdatacollection,dataanalysis,datastorage,displayandalarmandtemperaturecontroloffivemodules,anddescribesthespecificdesignofeachmoduleKeyWords：Thedataacquisitioncard,Virtualinstrument,Labview1.绪论..........................................................................................................................................51.1引言..............................................................................................................................51.2测控技术的国内外发展现状......................................................................................51.3测量仪器的发展趋势..................................................................................................61.4本设计相关理论..........................................................................................................81.4.1主要内容..........................................................................................................81.4.2本设计能够实现的功能..................................................................................92.虚拟仪器................................................................................................................................102.1虚拟仪器的相关介绍................................................................................................102.1.1虚拟仪器的产生............................................................................................102.1.2虚拟仪器的发展............................................................................................102.1.3虚拟仪器与传统仪器的对比........................................................................112.1.4虚拟仪器的结构............................................................................................122.2LABVIEW软件的相关介绍.........................................................................................132.2.1Labview的特点.............................................................................................132.2.2Labview的应用.............................................................................................132.2.3Labview程序的设计方法.............................................................................142.3Labview的基本概念................................................................................................162.3.1VI与子VI......................................................................................................162.3.2前面板.............................................................................................................162.3.3程序框图........................................................................................................172.3.4数据流驱动....................................................................................................182.4Labview程序设计的步骤.........................................................................................182.5VI的调试方法...........................................................................................................193.测试系统的相关理论及硬件设备........................................................................................213.1数据采集理论............................................................................................................213.1.1数据采集理论概述........................................................................................213.1.2信号源............................................................................................................213.1.3信号调理.........................................................................................................213.1.4输入信号类型................................................................................................213.1.5数据采集设备...............