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学校代码： 10128

学号： 200710107062

本科毕业论文

题 目：虚拟频谱分析仪的设计 学生姓名： 学 院： 系 别： 专 业： 班 级： 指导教师：

二 〇 一 一 年 六 月

内蒙古工业大学本科毕业设计

摘 要

随着科学技术的不断发展，技术水平的不断提高。电子技术正在受到人们的极大关注，而能够代替实物，节约资源与成本的虚拟电子技术更是受到人们的追捧。频谱分析仪作为信号分析的主要工具之一，受到人们的重视。虚拟频谱分析仪正是在这样一种背景下，得到了长足的发展。

虚拟仪器是将仪器技术、计算机技术、总线技术和软件技术紧密的融合在一起，利用计算机强大的数字处理能力实现仪器的大部分功能，打破了传统仪器的框架，形成的一种新的仪器模式。LabVIEW(Laboratory Virtual Instrument Engineering Workbench)是一种图形化的编程语言，利用LabVIEW可以方便地建立各种虚拟仪器。

本课题中设计的虚拟频谱分析仪，是基于软件LabVIEW8.2设计的模块化虚拟分析仪。本课题设计的虚拟频谱分析仪主要实现的功能，是对信号的采集，然后进行滤波除噪，加窗修复，傅里叶变换等一系列处理，分析原始信号各个频率成分的的幅值和功率，即获得幅值谱和功率谱。

关键词：LabVIEW，虚拟仪器，频谱分析，幅值，功率

内蒙古工业大学本科毕业设计

Abstract

With the development of science and technology, and the technical levels rising， Electronic technology is under people's attention, and electronic technology which can replace physical, save conservation of resources and cost of virtual is gained by people. A spectrum analyzer as one of the main signal analysis tools has got attention by people. Virtual spectrum analyzer which is in this kind of background, obtained the considerable development.

Virtual instrument is mixing instrument technology、 computer technology 、 the bus technology and software technology closely together, using a computer’s powerful digital processing power to realize the function of most of the instruments, has broken the traditional instruments and the framework of the formation of a new instrument mode. LabVIEW Laboratory (and of ground Engineering Workbench) is a graphical programming language, using LabVIEW can easily set up all kinds of Virtual Instrument. This topic which is in the design of virtual spectrum analyzer is based on the modular design software LabVIEW8.2. This topic designing virtual spectrum analyzer is wanting to realize the main function, which is to collect signal, and then to filter, window function and repair except noise, Fourier transform, and so on. Its purpose is to analysis the original signal with each frequency components of the amplitude and power ,that is say, get amplitude spectrum and spectrum.

Keywords: LabVIEW, virtual instrument, spectrum analysis, amplitude, Power