论文编号:CK076论文字数:10359,页数:30
摘 要
虚拟仪器(Ⅵ) 是计算机技术和传统的仪器仪表技术相结合的产物,是仪器发展的一个重要方向。与传统仪器技术不同，虚拟仪器技术指在包含数据采集设备的通用计算机平台上，根据需要可以高效率地构建起形形色色的测量系统。对大多数用户而言，主要的工作变成了软件设计。虚拟仪器技术突破了传统仪器的局限，可以将许多信号处理的方法方便的应用于测量中，并且为自动测量和网络化测量创造条件。
LabVIEW是一个基于图形化编程语言的虚拟仪器软件开发工具，本文阐明了运用LabVIEW图形化编程语言开发虚拟数字滤波器的设计过程。通过对 IIR数字滤波器算法的研究，得出IIR数字滤波器的设计方案。经过仿真实验表明该滤波器能够滤除信号中的噪声，滤波效果良好，可与其它大型虚拟电子测量系统兼容以完成不同环境下的测量要求。
关键词 ：LabVIEW 虚拟滤波器
Abstract
Virtual instrument (VI) is the combination of the computer technology and the traditional instruments technology, is an important direction in the development of instrument. With traditional instruments, the virtual instrument technology means that on the general-purpose computer platform which contains data acquisition device, according to needs, you can construct various measurement system efficiently . For most users, the main work is a software design. The virtual instrument technology breaks through the traditional instruments, can take many signal processing methods into measurement conveniently, and creates conditions for automatic measurement and network measurement.
LabVIEW is a programming language based graphical of virtual instrument software development tools, this paper expounds LabVIEW graphical programming language used to develop virtual design of the digital filter process. Through the research of digital filter algorithm IIR,we can get the design scheme of the IIR digital filter. Through the simulation experiments show that the filter can filter out the noise of the signal, we know that the effect of the filter is good and it is compatible with other large virtual electronic measurement system to complete measurement requirements in different environment.
Key words: LabVIEW Virtual digital filter
目 录
摘要 I
Abstract II
第一章 绪论 1
1.1 数字滤波器技术的发展状况 1
1.2 虚拟仪器简介 2
1.3 LABVIEW软件简介 3
1.3 滤波器及其LABVIEW实现 4
第二章 数字滤波器的基本概念 6
2.1 数字滤波器的分类 6
2.2 IIR数字滤波器的基本概念 7
2.3 系统的描述 8
第三章 数字滤波器的实现方法 10
3.1滤波频率特性的逼近准则 10
3.2脉冲响应不变法 12
第四章 数字滤波器设计及测试过程 15
4.1 设计思路 15
4.2 设计过程 16
4.2.1设计原理图 16
4.2.2自选信号的生成 18
4.2.3滤波部分的设计 19
4.2.4显示部分的设计 21
4.2.5效果测试 22
结论 25
致谢 26
参考文献 27
基于LABVIEW的滤波器设计......