摘要随着电子计算机行业和测量技术的不断发展，对虚拟仪器的发展要求也将越来越高，虚拟仪器作为一种新兴的仪器将会得到许多科研人员的关注。LabVIEW是一款图形化的编程语言，拥有着极为强大的数据库，为从事虚拟仪器设计的人员提供了一个优良的编程环境。LabVIEW作为一款编程软件和myDAQ相互结合，可以更好地进行交互。本文将利用LabVIEW和myDAQ软件硬件结合对下列虚拟仪器进行设计：83822

1。函数发生器是实验室常用仪器，本设计利用虚拟仪器设计出的函数发生器可以产生方波、三角波和正弦波等波形，并且产生的波形信号非常清晰准确,设计出的信号可以用myDAQ的Scope读取，也可以利用后续设计出的示波器和频谱仪对函数信号进行读取分析。

2。频谱仪可以对函数发生器或者外部信号进行读取分析，对函数的时域和频域进行分析显示，这样有利于对函数信号进行分析显示，将函数发生器产生的信号通过myDAQ输入到频谱仪内，然后在频谱仪内分析。

3。示波器与滤波器的设计将会更加方便函数信号的分析处理，同时可以将滤波信号和函数信号进行对比显示，也可以设计前面板来调节各个参数，改变滤波信号和示波器显示信号。

毕业论文关键词：虚拟仪器，LabVIEW，myDAQ，图形化编程

Abstract With the continuous development of the electronic computer industry and measurement technology, the development of the virtual instrument will be higher and higher。 As a new instrument, the Virtual Instrument will get the attention of many researchers。 LabVIEW is a graphical programming language, it has very powerful database to provide a good programming environment for the design of Virtual Instruments。 LabVIEW as a software of hardware programming can be combined with myDAQ each other。 This article will use LabVIEW and myDAQ to design the following virtual instrument:

1。 Function generator is the laboratory equipment, which is commonly used。 This design use virtual instrument to design a function generator, which can produce a square wave, triangle wave and sine wave, etc。 The waveform signal from function generator is very clear and accurate, and function generator signals can be read by the scope of myDAQ, it can also use the oscilloscope and spectrum analyzer which is designed afterwards to read and analyze the function signal。 

2。 Spectrum analyzer can read and analyze from function generator or external signals, the display of time domain and frequency domain of function is good for the function signal to analysis。 In this paper, the signal generated by the function generator through myDAQ is input into the spectrum analyzer and then analyzed in the spectrum analyzer。

3。 Oscilloscope and filter design will be more convenient for the analysis and processing of the function signal 。The design of the front panel can be filtered signals and function signals to compare the record。 Oscilloscope and filter can also be designed the front panel to adjust the various parameters, change the filter signal and display signal。

Keywords: Virtual Instrument, LabVIEW, my DAQ, Graphical Programming

目录

第一章 绪论 1

1。1 虚拟仪器的原理及系统 1

1。1。1 虚拟仪器的概念 1

1。1。2 虚拟仪器的硬件组成 2

1。1。3 虚拟仪器的软件模块 4

1。2 课题的研究背景和现状 4

1。2。1研究背景 5

1。2。2发展趋势 6

1。3 课题研究的意义