基于labview的双通道示波器设计

本科毕业设计说明书基于LABVIEW的双通道示波器设计DESIGNOFDUALCHANNELVIRTUALOSCILLOSCOPEBASEDONLABVIEW学院（部）：机械工程学院专业班级：学生姓名：指导教师：2013年6月10日安徽理工大学毕业设计I基于LABVIEW的双通道示波器设计摘要虚拟仪器是现代计算机软硬件技术飞速发展的产物，它正逐步取代传统的电子仪器，是现代电工电子测量仪器的发展方向。虚拟仪器主要由数据采集、数据分析处理、数据输出与显示三部分模块组成。本文主要介绍双通道虚拟示波器的设计。这种仪器是基于被命名为LABVIEW图形化语言而发展形成的，并且它能够实现数据采集、显示波形、数据存储、测量录音、打印数据和在线传输等多种功能。实验结果显示这种仪器拥有以下优势，例如稳定的显示、精准的测量、功能扩展和方便不同水平的人员操作的友好的交互界面。关键词：虚拟仪器,双通道示波器,LABVIEW安徽理工大学毕业设计IIDESIGNOFDUALCHANNELVIRTUALOSCILLOSCOPEBASEDONLABVIEWABSTRACTThehypothesizedinstrumentisthemoderncomputersoftwareandhardwaretechnologyrapiddevelopmentproduct,itissubstitutingfortraditionalgraduallytheelectronicinstrumentation,isthemodernelectricianelectronicsurveyinginstrumentdevelopmentdirection.Thehypothesizedinstrumentmainlybythedataacquisition,dataanalysisprocessing,thedataoutputanddemonstratedthreepartsofmodulescompose.Thisarticledealswiththedesignofdualchannelvirtualoscilloscope.TheinstrumentwasdevelopedbasedongraphlanguagenamedLABVIEW,anditcanperformvarioustaskssuchasacquiringdata,displayingwaveform,storingdata,measuringplayback,printingdata,andonlinetransmission.Theexperimentalresultsshowthattheinstrumentenjoyssuchadvantagesassteadyperformance,precisemeasurement,expandedfunctionsandfriendlyinterfacesopeopleatvariouslevelsmayuseit.KEYWORDS:virtualinstrument,dualchannelvirtualinstrument,labview安徽理工大学毕业设计i目录摘要.........................................................................................................................IABSTRACT..........................................................................................................II1绪论....................................................................................................................11.1研究背景及动态......................................................................................11.2本文的研究意义及内容..........................................................................21.2.1研究意义.......................................................................................21.2.2研究内容.......................................................................................21.3国内外的研究现状.................................................................................32虚拟示波器的介绍............................................................................................42.1虚拟仪器的简介.....................................................................................42.2虚拟示波器的功能.................................................................................42.3虚拟示波器的组成部分.........................................................................52.4虚拟示波器的工作原理.........................................................................53采集系统的设计................................................................................................73.1数据采集技术简介.................................................................................73.2数据采集系统的设计.............................................................................93.2.1系统硬件配置............................................................................103.2.2通信协议....................................................................................113.2.3主机通信程序............................................................................113.2.4下位机的串行通信程序设计....................................................123.3数据采集的实现....................................................................................133.3.1LabVIEW通讯资源VISA简介................................................133.3.2在LabVIEW中调用C语言....................................................164设计与实现......................................................................................................174.1设计目标及要求...................................................................................174.2虚拟示波器简介...................................................................................174.3双通道示波器VI的主体及程序........................................................184.3.1仿真信号采集模块....................................................................194.3.2通道选择模块............................................................................194.3.3水平分度调节模块.....................................................................194.3.4幅值分度调节模块....................................................................204.3.5波形存储、停止模块................................................................20安徽理工大学毕业设计ii4.4双通道示波器VI的设计过程............................................................204.4.1前面板的创建和设计................................................................214.4.2各模块功能实现的设计............................................................305波形仿真部分..................................................................................................345.1仿真部分简介.......................................................................................345.2仿真波形参数设置...............................................................................345.3仿真波形效果图...................................................................................34结论......................................................