超低频任意波形信号发生器设计.doc

超低频任意波形信号发生器设计(LabVIEW) 摘 要 本文介绍了广泛应用于虚拟仪器程序设计的LabVIEW图形化集成开发平台，指出了它相对于传统程序设计语言的优点。探讨了在LabVIEW环境下,基于LabJackU12数据采集卡的任意波形发生器的设计,描述了LabJackU12的功能、特性、驱动及软硬件开发环境。并给出了该波形发生器在上述硬件的基础上,利用LabVIEW来编写驱动程序和软面板的方法。系统主要功能包括产生各种标准波形, 利用鼠标绘制任意波形, 波形编辑, 波形的模拟输出等, 具有操作简单、人机界面友好、软件可读性、可维护性好和系统易于升级等特点,能满足实际测试的各种需要。基于虚拟仪器技术的测量仪器设计方法,是设计虚拟仪器系统以替代传统仪器,实现仪器快速开发的有效途径，有效地解决了在超低频率情况下信号发生的问题。 关键词: 超低频 任意波形 LabVIEW LabJackU12 数据采集卡 Design of Ultra-low Frequency Arbitrary Waveform Signal Generator（LabVIEW） ABSTRACT It combined computer hardware, measurement and its hardware, and software of virtual instrument. LabVIEW, a graphics integrated development environment widely used in virtual instruments design, is introduced. Its advantages relative to the traditional program languages are presented. In this paper , The Design of Arbitrary Waveform Generator was analyzed base on LabJack DAQ card, with LabVIEW. LabJackU12’s function, peculiarity, drivers and condition of soft - hardware was written. Based on these hardware, the method that The arbitrary waveform generator applies graph programming language LabVIEW to program drive and soft - panel was introduced. The main functions of the system includes generating conventional waves, using mouse to draw arbitrary waves, editing waveform and waveform analog out, and so on. And it has advantages of simple operation, kind interface between computer and users, readable and maintainable block program, and easily upgrade. The system can satisfy the requirements of many pratical testing. Finally, The design method of analyzed instruments based on Virtual instrument technology is the availability way of celerity development instruments , this paper helps the instruments instead, To effectively solve the ultra low frequency signal in the case of the problem. Key Words：Ultra-low Frequency Arbitrary Waveform Generator LabVIEW LabJack U12 DAQ(Data acquisition) Card 目 录 第一章 概述 1 1.1 课题设计的意义及要求 1.1.1 意义 1.1.2 要求 1.2 虚拟仪器的概念及特点 1.2