基于labVIEW虚拟滤波器的设计与实现

文档编号:JD058   字数:19264.页数:40

摘要
随着电子测试技术的不断发展，测试技术正向自动化、智能化、数字化和网络化的方向发展。其中数字滤波器作为测试技术的重要工具而被广泛使用于各个领域。本课题是以数字虑波表软件设计为工程背景，主要对采集的波形数据进行相关处理，实现了相应的参数测量。
虚拟仪器技术是基于计算机的仪器及测量技术。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。
首先，本文档介绍了虚拟仪器以及LabVIEW相关知识，利用虚拟仪器的开发平台——LabVIEW开发的软件系统，主要包括五个模块：数据采集、显示记录、数据回放、数据处理和数据分析。数据处理模块主要实现数字滤波和加窗处理两大功能，可以选择不同的滤波器和窗函数以适应不同的情况。参数的不同设置能够使信号频率不断变化。
它是一种测试仪器和系统的概念及相关软件。另外结合测试技术和仪器的专业知识介绍在LabVIEW实现虚仪滤波器虑测试信号。也是高等院校中机械、自动化或信息技术相关专业学生必学的课程。

关键词：虚拟仪器、LabVIEW、滤波器
Abstract
Summary With the electronic tests and technological development, testing positive automation technology, intelligence, digital and network direction. Which digital filter technology as an important test tool has been widely used in various fields. The topic is based on figures consider wave form design software for engineering background, the acquisition of the main waveform data correlation, realize the corresponding parameter measurement. Virtual Instrument technology is computer-based instruments and measuring techniques. With the traditional instruments and technology, virtual instrument technology refers to the data acquisition equipment includes the general computer platform, According to the need to be highly efficient building up all kinds of measurement system. For most users, the main work into the software design. Virtual instrument technology breakthrough of the traditional limitations of the equipment could be many signal processing methods used in a convenient measurement, and for automatic measurement and network measurement to create conditions. First, the thesis of LabVIEW virtual instruments and associated knowledge, using virtual instrument development platform -- LabVIEW development of the software system, including the five main modules : data acquisition, records show, data playback, data processing and data analysis. Data processing module main digital filtering and windowing handle two major functions, can choose different filters and window function to adapt to different situations. The different parameters can be set up so that the signal frequency constantly changing. It is a test instruments and systems concepts and related software. Another combination of testing technology and equipment expertise introduced in LabVIEW virtual instrument filter consider test signals. As well as tertiary institutions machinery, automation and information technology-related professional students will learn courses.              

Key words:virtual instrument, LabVIEW, filter
目录
第一章引言..............................................................1
第一节 虚拟仪器简介 .....................................................2
第二节 虚拟仪器的概念................................................... 4
第三节 系统简介 .........................................................7
第四节 虚拟仪器的发展................................................... 9
第五节 虚拟仪器的工作原理 ...............................................9
第六节 LABVIEW 特点.................................................... 10
第七节 虚拟仪器的组成.................................................. 11
第八节 虚拟仪器的设计与实现步骤 ........................................16
第九节 LabVIEW简介 .....................................................17
第十节 本文档设计任务.................................................. 19
第二章 滤波器 ..........................................................20
第一节 滤波器的简单介绍 ................................................20
第二节 数字滤波器概念.................................................. 20
第三节 数字滤波器的分类 ................................................20
第四节 数字滤波器的一般分析、设计方法 ..................................22
第五节 数字滤波器的主要性能指标........................................ 23
第三章 设计实现 ........................................................26
第一节 滤波器及labVIEW实现 .............................................26
第二节 调用数字滤波器子程序的几个问题.................................. 26
第三节 在labVIEW中设计滤波器........................................... 28
第四章 总结与展望...................................................... 34
结束语 .................................................................35
致谢 ...................................................................36
参考文献............................................................... 37

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