毕业设计（论文）-基于LabVIEW的仿真信号发生器的设计.doc

基于LabVIEW的仿真信号发生器的设计
摘要
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、锯齿波的功能。
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 LabVIEW 数据采集卡信号发生器
Based on the simulation signal generator labview the design
ABSTRACT
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. 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.
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 LabVIEW Data AcquisitionCards Signal Generator
目录
摘要 I
ABSTRACT II
1 绪论 1
研究背景及动态 1
虚拟仪器发展前景 1
2 LabVIEW设计的总体概述 3
LabVIEW的介绍 3
设计的目的及其要求 4
设计的基本流程和方案 5
3 数据采集的介绍与应用 7
数据采集的系统构成 7
数据采集卡的选择 8
数据采集卡的主要性能指标 9
数据采集卡的组成 9
数据采集卡USB-6211 10
数据采集的硬件的安装与配置 10
数据采集的子程序 11
模拟输入 12
创建虚拟通道函数 12
定时设定VI 13
DAQmx 触发设定VI 13
DAQmx读取VI 14
模拟输出 15
4 虚拟仪器软件硬件的设计 17
虚拟仪器硬件平台 17
PC机 17
I/O接口设备 17
虚拟仪器的软件设计 19
LabVIEW应用程序的构成 19
LabVIEW的操作模板 20
仿真信号的生成 2