1、 基于虚拟仪器技术的多功能信号发生器设计 摘 要 虚拟仪器技术是将仪器技术、 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 NI USB-6211 数据采集卡，将虚拟仪器技术用于多功能信号发生器 的设计。该系统具有生成正弦波、方波、三角波、锯齿波及 PWM(Pulse Width Modulation)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及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
2、、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。证明本文很有参考价 值。 关键词： 虚拟仪器，数据采集卡，信号发生器，LABVIEW The design of multi-functional signal generator base on virtual instrument technology ABSTRACTABSTRACT Virtual instrument technology is formed by the instrument technology, computer technolo
3、gy, bus technology and software technology. Powerful digital processings 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 NI USB-6211 data acquisition card. T
4、he virtual instrument technology has been utilized in the design of multi-functional signal generator. The system has ability to produce sine wave, square wave, and triangle wave, saw tooth wave and PWM (Pulse Width Modulation) wave. This article summarizes the development and trend of the signal ge
5、nerator and virtual instrument at home and abroad at first. And then introduces the theory of signal generator and 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 buss standard. Based on the
6、analysis of this systems functional requirements, this article introduces the hardware and technology which involved in design of the data acquisition card and the LABVIEW programming modes. Testify this article have great reference value. Key WordsKey Words： Virtual Instruments， Data Acquisition Cards， Signal Generators， LABVIEW 目录 第一章 绪论 1 1.1 引言 1 1.1.1 信号发生器的发展史 1 1.1.2 虚拟仪器的发展趋势 2 1.1.3 课题的主要任务 . .3 第二章 虚拟仪器 . .4 2.1 虚拟仪器的特点及机制 4 2.1.1 虚拟仪器系统与传统仪器的比较.4 2.1.2 虚拟仪器的特点及优势.4 2.1.3 系统
