JIU JIANG UNIVERSITY
毕 业 论 文（设 计）
题 目 基于U120816卡的数据采集软件
设计
英文题目The Data Acquisition Software
design based on U120816 Card
院 系 电子工程学院 专 业 通信工程 姓 名 年 级 二零零九级 指导教师 江金龙
二零一三年五月
九江学院学士毕业论文
摘 要
随着电子计算机技术和软件开发技术的快速发展，电子计算机在数据的分析
和处理，显示，存贮等方面的优势突出比传统的仪器越来越明显。与此同时，随着计算机价格不断在降和性能不断在提升，传统仪器的价格又长期居高不下，再加上传统仪器的功能单一，发展虚拟仪器已经成为一个不可阻挡的。美国NI公司在这种环境下，率先发起了对虚拟仪器的研究开发，推出了Labview软件开发平台。
本论文在掌握了虚拟仪器的基本结构及信号处理的相关知识基础之上，设计了一套数据采集，通过USB接口连接外围电子设备与电子计算机。并对虚拟仪器的概念，结构，发展趋势进行了相关分析。介绍信号处理相关的基础知识，主要是数据的采集采集过程和数据分析。虚拟仪器主要由硬件和软件两个部分构成。本文对虚拟示波器的硬件即数据采集卡进行了初略的介绍，对其软件部分进行详细研究。在此基础上完成对信号的采集，信号的输出和信号的产生。
本论文在U120816数据采集卡的硬件基础上，通过LabvieW软件对U120816数据采集卡的再开发，实现电脑对外围电子设备的数据联通。
关键词：虚拟仪器 虚拟示波器 数据采集
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基于U120816卡的数据采集软件设计
Abstract
Along with the computer technology and software technology is developing rapidly, and the electronic computer in real-time data analysis and processing, storage, show， the advantages of the compared with traditional instruments is more and more obvious. Meanwhile, along with the computer cost-effective rising, the price of traditional instruments, plus high and long-term single function of traditional instruments, development virtual instrument has become an irreversible historical trend. The United States in this kind of environment in NI, pioneered the research and development of virtual instrument, he launched a Labview software development platform.
This topic on the concept of virtual instrument, the structure, the development trend for the correlation analysis. Introduces and signal processing related basic knowledge, mainly Fourier transformation. Virtual instrument mainly by the hardware and software two parts. In this paper the hardware that virtual oscilloscope data acquisition card of initial slightly, and discusses its software as part of a deep analysis. Virtual oscilloscope software is divided into several relatively independent modules, such as spectrum analysis module, storage module, display module, filter modules etc.
Key words: virtual instrument；virtual oscilloscope；data collection
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九江学院学士毕业论文
目录
摘 要....................................................................................................................... I Abstract............................................................................................................... ..II 第一章 绪论.......................................................................................................... 1
1.1虚拟仪器的基本概念.............................................................................. 1 1.2虚拟仪器的构成...................................................................................... 1 1.3虚拟仪器的较传统仪器的优势.............................................................. 1 1.4虚拟仪器的现状及发展方向.................................................................. 1 1.5本论文的主要工作.................................................................................. 2 第二章 系统软件的开发平台Labview简介...................................................... 3
2.1 labview的基本概述............................................................................. 3 2.2 labview的模板分析 ................................................................................ 4
2.2.1工具模板....................................................................................... 5 2.2.2 控件选板...................................................................................... 6 2.2.3函数选板....................................................................................... 6
第三章 U120816数据卡硬件系统....................................................................... 8
3.1数据采集技术.......................................................................................... 8
3.1.1数据采集系统信号分类............................................................... 8 3.1.2基于计算机的数据采集系统各部分的作用............................... 8 3.2数据采集系统的设计............................................................................ 11
3.2.1采样/保持器的工作原理 ........................................................... 11 3.2.2多路转换模拟开关..................................................................... 12 3.3 U120816的基本组成 ............................................................................ 12
3.3.1 U120816数据采集卡简介 ......................................................... 12
第四章 虚拟示波器的软件设计........................................................................ 16
4.1 数据采集软件功能分析........................................................................ 16 4.2 模拟波形采集模块设计........................................................................ 17
4.2.1数据采集功能实现..................................................................... 18 4.3 模拟波形采集模块测试........................................................................ 20 4.4 小结........................................................................................................ 21 第五章 结论和展望............................................................................................ 22
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