外文翻譯----虛擬函數(shù)波形發(fā)生器的設(shè)計(jì)

1、<p>　　The Design of Virtual Function waveform Generator</p><p>　　Abstract—In this paper, a Virtual Function Signal Generator is designed Based on Labview. How to design the generator is introduced in de

2、tail. The Virtual Function Signal Generator can generate basic wave such as Sine wave, formula wave, white noise etc. The generator has functions like wave showing and date saving in addition.</p><p>　　Keywo

3、rds- Virtual Instrument; Labview;Function Signal Generator</p><p>　　I. INTRODUCTION</p><p>　　The function signal generator is applied in great many of fields. Virtual Instrument is a new type of

4、 instrument which has especial functions that old one do not have. One VI includes PC, hardware which is particularly designed and special software. Being a graphical programming language Labview is used for date gatheri

5、ng, instrument controlling and date analyzing. How to design virtual function signal generator by Labview is explained in detail in the following paper.</p><p>　　II. TOTAL DESIGN</p><p>　　Accord

6、ing to the principle of function signal generator,four parts were designed to compose virtual function signal generator. These four parts are property setting, signal generating, wave showing and date saving.</p>

7、<p>　　A. Panel of Generator</p><p>　　In this system the panel are divided to property setting panel(fig.1) and total structure panel(fig.2) . Main options in the first one are frequency, amplitude, duty

8、 cycle and samples etc. about signal. These properties can be set in this panel. Total structure panel just includes four parts that were presented above and some additional parts.</p><p>　　Figure 1.Property

9、 Set Panel Figure2.Total Structure Panel</p><p>　　B. Function about Instruments</p><p>　　The Virtual Function Signal Generator can generate basic waves such as Sine wave , special

10、 waves like formula wave and some kinds of noise. Signal’s frequency can be regulated delicately or roughly. Property can be reset quickly and be used as subprogram sometimes. Moreover has the generator functions like wa

11、ve showing and date saving etc.</p><p>　　III. SOFTWARE ABOUT VIRTUAL FUNCTION SIGNAL GENERATOR</p><p>　　The Virtual Function Signal Generator was designed base on Labview 7.0. There are three mo

12、dules which compose this system: module of property setting, wave generating, wave showing and saving.</p><p>　　A. Module of Property Setting</p><p>　　Frequency setting and property resetting ar

13、e two important parts of this module. How to change frequency value multiply is explained in fig.3. Node Selectting is</p><p>　　applied repeatedly and skillfully so that data can be input in many channels. T

14、hen select data by switch button. So frequency controlling can be designed as real instrument. How to reset property quickly is explained in fig.4.</p><p>　　Figure4. Property Reset</p><p>　　Fig

15、ure3. Frequency Control </p><p>　　B. Module of Wave Generating</p><p>　　This module is the core of the Virtual Function Signal Generator. Structure CASE is used in this w

16、ork. By special node many types of waves can be generated. For example, how to generate sine wave is explained in fig.5. The other ones can be generated in similar way.</p><p>　　Figure5.Graphical Progranm Ab

17、out Sine Wave Generate</p><p>　　C. Module of Wave Showing and Saving</p><p>　　In fact this module is a composite one which include many functions as operating, applying, debugging, showing etc.

18、Because of lots of acts would be operated though this interface, this interface must be not only practical but also nice. Fig.6 just explained how to solve these problems.</p><p>　　Figure6.Graphical Program

19、About Total</p><p>　　IV. CONCLUSION</p><p>　　Being graphical language, Labview is very strong and easy tool to make system of measure and test. Virtual Function Signal Generator based on Labview

20、 has advantages such as having friendly interface, operating easily etc. It can generate many types of function signals which have big range of value of frequency and its output datas can be saved. So it can be applied w

21、idely.</p><p>　　虛擬函數(shù)波形發(fā)生器的設(shè)計(jì)</p><p>　　摘要 在本次設(shè)計(jì)中,虛函數(shù)信號(hào)發(fā)生器是基于相位差來設(shè)計(jì)的。文中詳細(xì)地介紹了如何設(shè)計(jì)發(fā)生器。虛擬函數(shù)信號(hào)發(fā)生器能產(chǎn)生基本波如正弦波,方波,白噪聲等。除此之外，這個(gè)函數(shù)信號(hào)發(fā)生器還有波形顯示和數(shù)據(jù)存儲(chǔ)功能。</p><p>　　關(guān)鍵詞 虛擬儀器；圖形化編程軟件；函數(shù)信號(hào)發(fā)生器</p

22、><p>　　一 虛擬函數(shù)波形發(fā)生器的介紹</p><p>　　函數(shù)信號(hào)發(fā)生器是應(yīng)用于很多領(lǐng)域。虛擬儀器是一種新型的具有特殊功能的儀器。虛擬函數(shù)信號(hào)發(fā)生器的設(shè)計(jì)包括詳細(xì)的計(jì)算機(jī)硬件設(shè)計(jì)和特殊的軟件設(shè)計(jì)。作為一個(gè)圖形化編程語言的虛擬儀器，它是用來收集相位差、控制儀表和分析數(shù)據(jù)的。以下將會(huì)詳細(xì)介紹如何利用虛擬儀器來設(shè)計(jì)虛擬函數(shù)信號(hào)發(fā)生器。</p><p><b>

23、;　　二 系統(tǒng)設(shè)計(jì)</b></p><p>　　根據(jù)函數(shù)信號(hào)發(fā)生器的工作原理,虛擬函數(shù)信號(hào)發(fā)生器是由四個(gè)部分來構(gòu)成的。這四個(gè)部分包括屬性設(shè)定、信號(hào)產(chǎn)生、波形顯示和數(shù)據(jù)存儲(chǔ)。</p><p><b>　　1.硬件系統(tǒng)設(shè)計(jì)</b></p><p>　　在本系統(tǒng)中，硬件面板分為屬性設(shè)定面板（圖1）和信息管理總體結(jié)構(gòu)面板(圖2)。第一部分

24、屬性設(shè)定主要包括輸出信號(hào)的頻率、幅值和取樣等。這些屬性可以通過屬性設(shè)定面板來設(shè)定。信息管理系統(tǒng)總體結(jié)構(gòu)主要是由上面提及的四部分和一些外部設(shè)備組成。</p><p>　　圖1 屬性設(shè)定面板 圖2 信息管理總體結(jié)構(gòu)面板</p><p><b>　　2.儀器的功能</b></p><p>　　虛擬函數(shù)信號(hào)發(fā)生

25、器能產(chǎn)生基本波如正弦波、方波和噪音一樣的特殊波形。信號(hào)的頻率可以微調(diào)和粗調(diào)。發(fā)生器可以迅速地被重置，有時(shí)還可以被用作子儀器。另外發(fā)生器還有波形顯示和數(shù)據(jù)存儲(chǔ)功能。</p><p><b>　　三 軟件設(shè)計(jì)</b></p><p>　　虛擬函數(shù)信號(hào)發(fā)生器的設(shè)計(jì)基于LabView 7.0的基礎(chǔ)。其中有3個(gè)模塊組成這個(gè)系統(tǒng)：屬性的設(shè)置，波浪發(fā)電，波浪模塊顯示和保存。<

26、;/p><p><b>　　1.屬性設(shè)計(jì)模塊</b></p><p>　　頻率設(shè)定和屬性重置是此模塊的兩個(gè)重要組成部分。圖3解析了如何改變頻率值。節(jié)點(diǎn)的選用和多次巧妙的運(yùn)用，使數(shù)據(jù)可以在多渠道中輸入。通過開關(guān)按鈕，然后選擇數(shù)據(jù)。因此，頻率控制，可設(shè)計(jì)成真正的工具。圖4解析了如何迅速重置設(shè)置。 </p><p>　　圖3 頻率控制

27、 圖4 屬性重置</p><p><b>　　2.產(chǎn)生波形模塊</b></p><p>　　波形產(chǎn)生模塊是虛擬函數(shù)信號(hào)發(fā)生器的核心。結(jié)構(gòu)就是用于完成這項(xiàng)工作。通過特殊的節(jié)點(diǎn)可以產(chǎn)生多種波形。例如，如何產(chǎn)生正弦波，圖5做出了解析。其它的波形通過類似的方式產(chǎn)生。</p><p>　　圖5 產(chǎn)生正弦波電路圖&

28、lt;/p><p>　　3、波形顯示模塊與數(shù)據(jù)存儲(chǔ)模塊</p><p>　　事實(shí)上，波形顯示與數(shù)據(jù)存儲(chǔ)模塊模塊是一個(gè)綜合多種功能的模塊，其中包括為運(yùn)行，應(yīng)用，調(diào)試，顯示等功能。因?yàn)榇罅康牟僮鞫际窃谶@個(gè)操作界面完成，因此，這個(gè)操作界面不僅要實(shí)用，而且要很完善。圖6只解釋了如何解決這些問題。</p><p><b>　　圖6 設(shè)計(jì)總圖</b><

29、/p><p><b>　　四 結(jié)論</b></p><p>　　作為圖形化編程語言，LabVIEW是非常強(qiáng)大和快捷的工具，在測(cè)量和測(cè)試系統(tǒng)方面有很大的作用?；贚abview的虛擬函數(shù)信號(hào)發(fā)生器具有完善的界面，而且具有操作簡(jiǎn)便、快捷等優(yōu)點(diǎn)。虛擬函數(shù)信號(hào)發(fā)生器具有產(chǎn)生多種類型信號(hào)的功能，而且輸出的頻率調(diào)節(jié)范圍大，輸出數(shù)據(jù)可以被保存。因此，它可以廣泛應(yīng)用。</p>

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