文档介绍：本科毕业设计论文
题目:基于LABVIEW虚拟示波器的设计
系别: 电气与信息工程
专业: 测控技术与仪器
摘要
虚拟仪器技术是现在计算机系统和仪器系统相结合的产物,是当今计算机辅助测试领域的一项重要技术。它推动着传统仪器朝着数字化,智能化,模块化,网络化的方向发展。
本文采用计算机声卡来代替工业用的数据采集卡。所设计出的虚拟仪器成本低、通用性强,在对采样频率要求不高的情况下,可以用声卡取代数据采集卡进行采样充分利用了价格低廉的声卡进行数据采集。文章阐述了虚拟仪器的背景、概念、发展、组成等,重点介绍了采用图形化编程软件LABVIEW设计虚拟示波器方法以及它的波形显示、频谱分析、参数显示等功能,最终实现开发一个能够对声音信号进行显示的虚拟示波器。
本文所设计的虚拟示波器经过测试可以对信号正确的采集和显示,达到了本次虚拟示波器的设计要求。
关键词:虚拟仪器,LABVIEW,示波器
ABSTRACT
Virtual instrument technology is now puter system and instrumentation bining the product of today'puter-aided testing is an important technology area. It advances towards the traditional digital instrumentation, intelligent, modular, network-based direction.
In this paper, computer sound card to replace the industrial data acquisition card. The design of the virtual instrument, low cost, versatility, less demanding in the case of sampling frequency can be used to replace the sound card data acquisition card to sample the full advantage of the cheap sound card for data acquisition. Paper describes the background of virtual instruments, concepts, development, composition, focusing on the use of LABVIEW graphical programming software design method and its virtual oscilloscope waveform display, virtual spectrum analysis, parameter display and other functions, ultimately able to develop a sound signal shows a virtual oscilloscope.
Designed in this paper tested the virtual oscilloscope can capture and display the correct signal, reaching the second virtual oscilloscope design requirements.
KEY WORDS: Virtual instruments, LABVIEW ,Oscilloscope
目录
1绪论 1
虚拟仪器背景 1
虚拟仪器的产生 1
1
2
2
虚拟仪器的现状 3
国外虚拟仪器的研究现状 3
4
4
5
2 虚拟示波器设计理论 7
虚拟示波器的基本原理 7
7
7
9
10
10
11
12
3 虚拟示波器软件设计 15
LABVIEW 简介 15
G语言简介 15
LABVIEW 程序组成 16
LABVIEW 中有关声卡