基于LABVIEW的濾波器設(shè)計(jì)

測控論文編號(hào):CK076   論文字?jǐn)?shù):10359,頁數(shù):30

目  錄
摘要 I
Abstract II

第一章 緒論 1
        1.1 數(shù)字濾波器技術(shù)的發(fā)展?fàn)顩r 1
        1.2 虛擬儀器簡介 2
        1.3 LABVIEW軟件簡介 3
        1.3 濾波器及其LABVIEW實(shí)現(xiàn) 4
第二章 數(shù)字濾波器的基本概念 6
       2.1 數(shù)字濾波器的分類 6
        2.2 IIR數(shù)字濾波器的基本概念 7
        2.3 系統(tǒng)的描述 8
第三章 數(shù)字濾波器的實(shí)現(xiàn)方法 10
        3.1濾波頻率特性的逼近準(zhǔn)則 10
        3.2脈沖響應(yīng)不變法 12
第四章 數(shù)字濾波器設(shè)計(jì)及測試過程 15
        4.1 設(shè)計(jì)思路 15
        4.2 設(shè)計(jì)過程 16
        4.2.1設(shè)計(jì)原理圖 16
        4.2.2自選信號(hào)的生成 18
        4.2.3濾波部分的設(shè)計(jì) 19
        4.2.4顯示部分的設(shè)計(jì) 21
        4.2.5效果測試 22
結(jié)論 25
致謝 26
參考文獻(xiàn) 27

摘  要
 虛擬儀器(Ⅵ) 是計(jì)算機(jī)技術(shù)和傳統(tǒng)的儀器儀表技術(shù)相結(jié)合的產(chǎn)物,是儀器發(fā)展的一個(gè)重要方向。與傳統(tǒng)儀器技術(shù)不同，虛擬儀器技術(shù)指在包含數(shù)據(jù)采集設(shè)備的通用計(jì)算機(jī)平臺(tái)上，根據(jù)需要可以高效率地構(gòu)建起形形色色的測量系統(tǒng)。對大多數(shù)用戶而言，主要的工作變成了軟件設(shè)計(jì)。虛擬儀器技術(shù)突破了傳統(tǒng)儀器的局限，可以將許多信號(hào)處理的方法方便的應(yīng)用于測量中，并且為自動(dòng)測量和網(wǎng)絡(luò)化測量創(chuàng)造條件。
 LabVIEW是一個(gè)基于圖形化編程語言的虛擬儀器軟件開發(fā)工具，本文闡明了運(yùn)用LabVIEW圖形化編程語言開發(fā)虛擬數(shù)字濾波器的設(shè)計(jì)過程。通過對 IIR數(shù)字濾波器算法的研究，得出IIR數(shù)字濾波器的設(shè)計(jì)方案。經(jīng)過仿真實(shí)驗(yàn)表明該濾波器能夠?yàn)V除信號(hào)中的噪聲，濾波效果良好，可與其它大型虛擬電子測量系統(tǒng)兼容以完成不同環(huán)境下的測量要求。

關(guān)鍵詞 ：LabVIEW  虛擬濾波器

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