摘要随着计算机性价比的不断提升，传统仪器的价格又长期居高不下，再加上传统仪器的功能单一，发展虚拟仪器已经成为一个不可阻挡的历史潮流。美国NI公司在这种大环境下，率先发起了对虚拟仪器的研究开发，推出了LabVIEW软件开发平台。68254

本课题就是借助于LabVIEW开发平台来实现一个信号发生与测试系统，该系统主要包含一个信号发生器和一个示波器，通过信号发生器产生可控制的波形，并由示波器来进行检测，当然实际设计中还可以考虑增加一些附属功能。

该课题的实现需要我们掌握LabVIEW的相关设计思想和操作以及信号处理等方面的相关知识。在此知识的基础上，通过对系统的分析，采用模块化的设计思想，将此系统分为信号发生，波形采集，波形显示和控制，波形储存，频谱分析和参数测量等各个模块。设计时，首先进行各模块的设计，再进行整体的先后连接，从而最后实现一个功能较为完备的信号发生与测试系统。

毕业论文关键词  虚拟仪器 信号发生器 示波器

毕业设计说明书（论文）外文摘要

Title   The design of signal generator and test system based on virtual instrument

Abstract

With the high performance cost ratio of computers, and long-term high prices of traditional instruments, coupled with the single function of traditional instrument, the development of virtual instrumentation has become an irresistible trend of history. In this environment, NI company of American spearheaded the research and development of the virtual instrument, launched a development platform of LabVIEW software.

The issue is by means of the platform of LabVIEW development to implement a signal generator and test system. This system includes a signal generator and an oscilloscope, which can be controlled by the signal generator waveform and detected by the oscilloscope, of course, the actual design can be considered to increase the number of subsidiary functions.

In order to realize this subject, we need to grasp the relevant design ideas and the operation of LabVIEW and signal processing and other aspects of relevant knowledge. Based on this knowledge, through the systematic analysis, using the modular design concept, pide this system into signal generation, waveform acquisition, waveform display and control, waveform storage, spectrum analysis, parameter measurement and so on. At first we need to performed the design of each module, then conduct an overall successively connection, thus finally to achieve a more complete functional signal generation and test system.

Keywords: virtual instrument，signal generator，oscilloscope

目   次

1 绪论 1

1.1 虚拟仪器的基本概念 1

1.2 虚拟仪器的构成 1

1.3 虚拟仪器的优势 1

1.4 虚拟仪器的现状及发展方向 2

2 虚拟软件的开发平台LABVIEW简介 5

2.1 LABVIEW的基本概念 5

2.2 LABVIEW的模板分析 6

2.3 本章小结 8

3 系统的软件设计 9

3.1 信号发生器的设计 9

3.2 示波器的设计 15

3.3 本章小结 27

4 系统测试 28

4.1各模块测试运行