基于LabVIEW的振动信号测试系统设计

西南科技大学城市学院本科生毕业论文I基于LabVIEW的振动信号测试系统设计摘要：虚拟仪器是现代计算机技术同仪器技术深层次结合的全新概念仪器，实质是利用计算机的显示器的显示功能模拟传统仪器的控制面板，以多种形式表达输出测量结果，利用计算机强大的软件功能实现信号数据的运算、分析和处理，完成各种测试功能的一种计算机仪器系统。本次设计利用了基于LabVIEW的虚拟仪器技术设计了一套振动测试系统，下位机采用AT89C52单片机进行数据采样，并通过RS-232串口与上位机通信实现信号数据的传输，上位机软件开发基于LabVIEW平台。其具有信号采集，波形显示，数据处理，数据保存，信号参数检测等功能，具有操作简单，界面直观，适用性强等特点。通过设计，能够对数据进行时域显示和频域分析处理。关键词：虚拟仪器；振动测试；LabVIEW；单片机西南科技大学城市学院本科生毕业论文IIVibrationTestingSystemBasedonLabVIEWSignalDesignAbstract:Virtualinstrumentationismoderncomputertechnologycombinedwiththedeep-seatedinstrumenttechnologynewconceptinstrument,inessence,theuseofthecomputermonitor'sdisplaytraditionalanaloginstrumentcontrolpaneltooutputmeasurementresultsofvariousformsofexpression,theuseofpowerfulcomputersoftwarefunctionstheoperationdataforsignalanalysisandprocessingiscompletedforalltestfunctionsofacomputersystemapparatus.ThedesigntakesadvantageofLabVIEW-basedvirtualinstrumenttechnologydesignedavibrationtestsystems,next-bitmachineusingAT89C52microcontrollerfordatasampling,andtoachievedatatransmissionsignalviaRS-232serialcommunicationwiththePC,PCsoftwaredevelopmentbasedonLabVIEWplatform.Whichhasasignalacquisition,waveformdisplay,dataprocessing,datastorage,signalparameterdetectionandotherfunctions,withasimple,intuitiveinterface,applicability,andothercharacteristics.Bydesign,thedatacanbedisplayedintimedomainandfrequencydomainanalysis.Keywords:VirtualInstrument,vibrationtest,LabVIEW,SCM西南科技大学城市学院本科生毕业论文III西南科技大学城市学院本科生毕业论文IV目录第1章绪论.......................................................................................................................11.1课题研究的背景和意义........................................................................................11.3论文主要设计内容................................................................................................1第2章虚拟仪器和LabVIEW..........................................................................................42.1虚拟仪器................................................................................................................42.1.1虚拟仪器的概念.........................................................................................42.1.2虚拟仪器的组成.........................................................................................42.1.3虚拟仪器的特点及优势.............................................................................52.2LabVIEW.................................................................................................................62.2.1LabVIEW简介............................................................................................62.2.2LabVIEW的基本特点................................................................................6第3章振动测试分析系统...............................................................................................83.1振动测试分析系统的组成....................................................................................83.2信号测试与分析....................................................................................................83.3振动测试系统总体设计........................................................................................9第4章硬件设计.............................................................................................................104.1系统总体设计方案..............................................................................................104.2压电加速度传感器..............................................................................................104.3电荷放大器...........................................................................................................114.4A/D转换器TLC2543性能介绍...........................................................................114.5单片机模块..........................................................................................................134.5.1AT89C52性能介绍....................................................................................134.5.2A/D转换电路............................................................................................164.6基于AT89C52单片机的串口硬件采集接口电路设计.....................................174.6.1串口简述...................................................................................................174.6.2串口硬件采集接口电路设计...................................................................194.7单片机数据采集软件程序设计..........................................................................20西南科技大学城市学院本科生毕业论文V第5章LabVIEW软件设计...........................................................................................215.1LabVIEW软件总体设计方案.............................................................................215.1.1系统主界面设计........................................................................................225.2LabVIEW程序设计.............................................................................................235.3数据采集模块设计..............................................................................................235.4信号预处理模块设计..........................................................................................245.5时域分析模块设计................................................................