信号发生及频谱分析实验报告分析.doc

基于LABVIEW的信号发 生及频谱分析的设计 课程设计： 虚拟仪器系统设计 专业名称： 电子信息工程 2013年11月25日 基于虚拟仪器的信号发生及频谱分析的设计 【摘要】 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。 本设计采用USB6211数据采集卡，将虚拟仪器技术用于信号发生器的设计。该系统具有生成正弦波、方波、三角波、锯齿波及PWM波的功能。 本文首先概述了信号发生器及虚拟仪器技术在国内外的发展及趋势，然后介绍了信号发生器的相关理论，给出了信号发生器的基本原理框图，并探讨了虚拟仪器的总线及其标准、框架结构、LABVIEW开发平台。在分析本系统功能需求的基础上，介绍了数据采集卡、LABVIEW的编程模式等设计中所涉及到的硬件和技术。 本设计是虚拟仪器模拟真实仪器的尝试。实践证明虚拟仪器是一种优秀的解决方案，能够实现各种硬件可以完成的任务。 【关键词】 虚拟仪器，，，Signal based on virtual instrument and the design of the frequency spectrum analysis Abstract Virtual instrument is formed by the instrument technology, computer technology, bus technology and software technology. Powerful digital processing’s ability of computer is used to achieve the main functions of instrument. Virtual instrument broke the framework of the traditional instruments, and built a new device model. This design uses USB6211 data acquisition card. The virtual instrument technology has been utilized in the design of signal generator. The system has ability to produce sine wave, square wave, and triangle wave, saw tooth wave and PWM wave. This article summarizes the development and trend of the signal generator and virtual instrument at home and abroad at first. And then introduces the theory of signal generator, gives a basic block diagram of signal generator, also the frame structure and LABVIEW development platform of the virtual instrument with the inquiry of the bus’s standard. Based on the analysis of this system’s functional requirements, this article introduces the hardware and technology which involved in design of the data acquisition card and the LABVIEW’s programming modes.The design is an attempt of virtual instrument to simulate the reality instrument. It shows the virtual instrument is an excellent solution to achieve the task which is achieved by traditional hardware in the past. Key Words: Virtual Instruments， ata Acquisition Cards， ignal Generators， LABVIEW  目录 1. 实验相关问题 1 1.