LabVIEW及信号发生器的频谱分析及时域分析.doc

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、性能价格化、可操作性等方面与传统仪器相比都具有明显的技术优势，将虚拟仪器引入用于信号产生与分析上不但可以提高测试效率，而且为降低生产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，在实际开发设计过程中，本文主要对模块化设计方法进行了介绍，详细描述了信号产生、数据分析处理、数据读取和存储、显示模块等软件开发的全过程，分析、解决了设计及实现过程中出现的问题。 本文设计的系统主要功能是利用该软件进行波形的产生、时域参数的测量、频谱的分析、波形存储、波形回放等，此软件用于教学大大提高了学生的学习兴趣，达到了提高教学质量的目的。此外，还可以用于基础性科研。 关键词：虚拟仪器；LabVIEW；信号发生器；频谱分析；时域分析Abstract Along with the development of the microcomputer ,compare with traditional instruement ,the virtual instruement have the obvious technical advantage in knowledge ware ,processing capability ,the ratio between function and price ,and Maneuver ability .The introduction of the virtual instrument in a system of generation and analysis can not only increase the efficiency and quantity of testing ,but also provide the effective method to reduce the cost of producing the instrument .It has the peculiarity of low cost ,high performance and gradually perfect test means . In the paper ,using the LabVIEW(Laboratory Virtual Instrument Engineering Workbench) GUI as the developing platform .It uses the design method of module to describe the whole building Process of the typical signal generation module for example:signal creating module，date handling module，data reading and writing module，result demonstrate module. The function of generating signal ,measuring the parameters in the domain,analyzing the signal in frequency domain ,recording data ,returning data ,returning data play back ,ect all have been realized .After used in teaching ,it is proved that the system has greatly enhanced the students interest in learning and achieves the goal of improving the teaching quality .In addition ,the system also can be used in the fundamental scientific research . Keywords:virtual instrumention ;signal generator ;spectrum analysis ;time domain analysis 目 录 摘 要 I Abstract II 第一章 绪论 - 1 - 1.1 虚拟仪器国内外研究现状 - 1 - 1.2 高校实验教学的现状 - 2 - 1.3 研究意义 - 2 - 1.4本文主要工作 - 3 - 第二章 虚拟仪器与LabVIEW - 4 - 2.1虚拟仪器简介 - 4 - 2.1