毕业论文：基于Labview的虚拟示波器的设计（定稿）.doc

基于Labview的虚拟示波器的设计 [摘要] 本文介绍了一种新型的示波器：虚拟示波器。虚拟示波器是虚拟技术的一种具体应用。该示波器基于计算机平台,将虚拟仪器硬件和软件紧密结合，实现比传统仪器更强大的功能。虚拟示波器系统由数据采集、数据分析和结果输出显示三个主要功能部分组成。其中，数据分析和结果输出显示完全由计算机软件系统来完成，只有数据采集是在软件的控制下由硬件来完成。本文主要完成对软件系统的设计。 软件利用美国NI公司推出的LabVIEW图形编程语言，采用模块化的软件设计思想编写。本设计示波器主要由数据采集、参数测量和波形存储和读取模块组成。它的主要性能指标是双通道波形显示，波形可存储读取，以及电压、时间、频率等参数的测量，充分发挥了计算机强大的功能和软件设计的灵活性。 硬件采用的是阿尔泰PCI2003数据采集卡，此卡基于PCI总线。它的分辨率是12位，采样速率是100kHZ。 [关键词] 示波器 虚拟仪器 数据采集 LabVIEW  Based on the Labview virtual oscilloscope design [Abstract] This paper introduces a new type of oscillograph:Virtual oscillograph. It is a kind of appilication of VI technology.This oscillograph is based on computer ,it combines the virtual instruments hardware with software close to realize the stronger function than traditional instrument. The virtual oscillograph system includes three main function parts,they are data acquisition, data analysis and output display.Among them, data analysis and output display are completely realized by the computer software system, only the data acquisition is completed by hardware under the function of the software.This paper mainly completes the design to the software system. The software　designed by LabVIEW based on graphic language by the United States.The virtual oscillograph we designed consists data acquisition, paremeter measurement, wave read modules and wave storage modules. The main performance of this oscillograph is that it has two channels input,wave storage and measurement of the parameter of voltage,time and frequency. Give full play to the computer powerful functions and software design flexibility. The hardware of this design is the PCI2003 of Art, this card is based on PCI bus.The Resolution is 12 bit,sampling rate is 100kHz. [Key Words] Oscillograph Virtual instrument Data acquisition LabVIEW  第1章 绪论 1.1虚拟仪器介绍 1.1.1 虚拟仪器的发展历程 20年来，无论是初学乍用的新手还是经验丰富的程序开发人员，虚拟仪器在各种不同的工程应用和行业的测量及控制的用户中广受欢迎，这都归功于其直观化的图形编程语言。虚拟仪器的图形化数据流语言和程序框图能自然地显示您的数据流，同时地图化的用户界面直观地显示数据，使我们能够轻松地查看、修改数据或控制输入。 美国国家仪