基于LabVIEW的多功能虚拟信号发生器设计(2011)

基于LabVIEW的多功能虚拟信号发生器设计

作者姓名：XXX 专业班级：XXXXXXXX 指导教师：XXXXXX

摘 要

随着微型计算机和软件技术的发展，虚拟仪器在智能化程序、处理能力、性能价格比、可操作性等方面与传统仪器相比都具有明显的技术优势，将虚拟仪器引入高校的实验教学不但可以提高测试效率和教学的质量，而且为降低实验仪器成本提供了有效的途径和方法。

本文选用LabVIEW图形化编程语言为开发软件，主要开发虚拟实验仪器：虚拟信号发生器，同时提出了虚拟实验室的建设方案。基于专业虚拟仪器开发工具Labview，设计一虚拟函数信号发生器。该虚拟信号发生器能够产生正弦波、三角波、方波、锯齿波等波形，频率动态范围较宽且可微调。 关键字：虚拟仪器 labVIEW 信号发器

Abstrack：Along with the development of the microcomputer, compared with traditional instrument, the virtual instrument has the obvious technical advantage in knowledge ware, processing capability, the ratio between function and price, and Maneuver ability. The introduction of the virtual instrument to the university can not only increase the efficiency and quality of testing, teaching, but also provide the effective method to reduce the cost of the experiment instrument.

In this paper, selected LabVIEW graphical programming language for software development, mainly the development of virtual experiment equipment, virtual signal generator, virtual laboratory also made the building program. A Virtual Function Signal Generator is designed Based on Labview, The Virtual Function Signal Generator can generate Sine wave, triangle wave, square wave, teeth of a saw wave...etc。Dynamic range of frequency is wide and can regulate slightly。

Keyword : Virtual Instrument Labview Signal Generator

目 录

第1章 引 言...................................................... 1

1.1课题的提出 ....................................................... 1 1.2课题的主要研究工作 ............................................... 1 1.3课题意义 ......................................................... 1

第2章 虚拟信号发生器概况........................................... 3

2.1 信号发生器，虚拟仪器概述 ........................................ 3 2.1.1 信号发生器概述 .................................................................................................................. 3 2.1.2 虚拟仪器基本概念 .............................................................................................................. 3 2.1.3虚拟仪器的特点 ................................................................................................................... 5 2.2 虚拟仪器的现状和发展 ............................................ 7 2.2.1虚拟仪器的现状 ................................................................................................................... 7 2.2.2虚拟仪器的展望 ................................................................................................................... 8 2.3虚拟信号发生器的介绍 ............................................. 8 2.3.1信号发生器的基本原理 ....................................................................................................... 8 2.3.2虚拟信号发生器的工作原理 ................................................................................................. 9

第3章 虚拟仪器的软件开发平台LABVIEW .............................. 10

3.1 LABVIEW简介 .................................................... 10 3.2 LABVIEW的主要窗口 .............................................. 10 3.3 LABVIEW中信号处理与分析 ........................................ 13 3．4数据采集系统的构成 ............................................. 16

第4章 虚拟信号发生器的设计........................................ 18

4.1虚拟信号发生器创建过程 .......................................... 18 4.1.1软件设计方案 ..................................................................................................................... 18 4．1．2 标准频率 ........................................................................................................................ 20 4．2数字信号处理 ................................................... 20 4.3软面板的设计 .................................................... 23 4.3.1 仪器面板和参数设置 ........................................................................................................ 23 4.3.2波形的产生与调节 ............................................................................................................. 25 4．4实现效果图 ..................................................... 27

结 论............................................................. 30 致 谢............................................................. 31 参考文献........................................................... 32