外文翻譯---labview的測量和數(shù)據(jù)分析

1、<p><b>　　英文資料</b></p><p>　　Lab VIEW for Measurement and Data Analysis</p><p>　　Lab VIEW is the tool of choice due to its unparalleled connectivity to instruments, powerful data

2、acquisition capabilities, natural dataflow-based graphical programming interface, scalability, and overall function completeness. </p><p>　　Introduction</p><p>　　Users generally start their work

3、 by acquiring data into an application or program, because their tasks typically require interaction with physical processes. In order to extract valuable information from that data, make decisions on the process, and ob

4、tain results, the data needs to be manipulated and analyzed. Unfortunately, combining analysis with data acquisition and data presentation is not always a straightforward process. Application software packages typically

5、address one component of the</p><p>　　Figure 1. Lab VIEW Virtual Instrument Block DiagramWhile there are many tools that independently address each of the requirements, only Lab VIEW combines all of them wi

6、th the power of graphical programming and state-of-the-art data acquisition hardware, using the power of your PC. It is the combination of data acquisition, data analysis, and presentation of results, that truly maximize

7、s the power of Virtual Instrumentation. A virtual instrument consists of an industry-standard computer or works</p><p>　　Choosing the Correct Method for Analysis</p><p>　　Users incorporate analy

8、sis into their applications and programs in different ways. There are certain considerations that help determine the way in which analysis should be performed. </p><p>　　Inline vs. Offline analysisInline an

9、alysis implies that the data is analyzed within the same application where it is acquired. This is generally the case when dealing with applications where decisions have to be made during run time and the results have di

10、rect consequences on the process, typically through the changing of parameters or executing of actions. This is typically the case in control applications. When dealing with inline analysis, it is important to consider t

11、he amount of data acqui</p><p>　　Other examples for inline analysis are applications where the parameters of the measurement need to be adapted to the characteristics of the measured signal. One case is wher

12、e one or more signals need to be logged, but these change very slowly except for sudden bursts of high-speed activity. In order to reduce the amount of data logged, the application would have to quickly recognize the nee

13、d for a higher sampling rate, and reduce it when the burst is over. By measuring and analyzing certain asp</p><p>　　Decisions based on acquired data are not always made in an automated manner. Very frequentl

14、y, those involved with the process need to monitor the execution and determine whether it is performing as expected or if one or more variables need to be adjusted. Although it is not uncommon for users to log data, extr

15、act it from a file or database and then analyze it offline to modify the process, many times the changes need to happen during run time. In these cases, the application must handle the data</p><p>　　Lab VIEW

16、 offers analysis and mathematical routines that natively work together with data acquisition functions and display capabilities, so that they can be easily built into any application. In addition, Lab VIEW offers analysi

17、s routines for point-by-point execution; these routines are designed specifically to meet the needs of inline analysis in real-time applications. Users should consider certain aspects when deciding whether point-by-point

18、 routines are appropriate. </p><p>　　Point-by-point analysis is essential when dealing with control processes where high-speed, deterministic, point-by-point data acquisition is present. Any time resources a

19、re dedicated to real-time data acquisition, point-by-point analysis becomes a necessity as acquisition rates and control loops are increased by orders of magnitude. The point-by-point approach simplifies the design, impl

20、ementation, and testing process, because the flow of the application closely matches the natural flow of the r</p><p>　　Figure 2. Array-based Analysis vs. Point-by-Point AnalysisReal-time data acquisition a

21、nd analysis continue to demand more streamlined and stable applications. Point-by-point analysis is streamlined and stable, because it ties directly into the acquisition and analysis process. With streamlined, stable poi

22、nt-by-point analysis, the acquisition and analysis process can move closer to the point of control in FPGA (field programmable gate array) chips, DSP chips, embedded controllers, dedicated CPUs</p><p>　　To b

23、etter understand the advantages of point-by-point analysis routines, National Instruments suggests reading the document titled "Getting Started with LabVIEW Point-By-Point VIs."This document describes how to u

24、se the VI and includes a case study that shows a complete application built in Lab VIEW. The application demonstrates the simplicity and flexibility of point-by-point analysis. By adding these powerful algorithms and ro

25、utines into applications, users eliminate the guess work and creat</p><p>　　Offline applications don’t typically have the demand for results to be obtained in real-time fashion in order to make decisions on

26、the process. Offline analysis applications require only that sufficient computational resources are available. The main intent of such applications is to identify cause and effect of variables affecting a process by corr

27、elating multiple data sets. These applications generally require importing data from custom binary or ASCII files and commercial databases such as Or</p><p>　　Programmatic vs. Interactive AnalysisAs Lab VIE

28、W users, scientists and engineers are very familiar with the many ways in which they can acquire data from hundreds of devices. They build intelligence into their applications to perform inline analysis and present resul

29、ts while the applications are running. In addition, they are aware that acquiring data and processing it for the sake of online visualization is not enough. Users typically store hundreds or thousands of megabytes of dat

30、a in hard dr</p><p>　　It is relatively easy to acquire amounts of data so large that it rapidly becomes unmanageable. In fact, with a fast DAQ board and enough channels, it may only take a few milliseconds t

31、o compile thousands of values. It is not a trivial task to make sense out of all that data. Engineers and scientists are typically expected to present reports, create graphs, and ultimately corroborate any assessments an

32、d conclusions with empirical data. Without the right tools, this can easily become a daunting t</p><p>　　Figure 3. Time Domain Reflection VI Based on Joint Time-Frequency Analysis FunctionsWith Lab VIEW, us

33、ers can easily perform significant data reduction and formatting before storing it to disk, so that when the stored data is retrieved for further analysis, it is easier to handle. Lab VIEW also provides hundreds of funct

34、ions for generating reports based on the results and information obtained from the acquired data. </p><p>　　National Instruments offers additional tools that are highly integrated with Lab VIEW and are desig

35、ned to enhance collaborative engineering. NI Diadem is one such tool; it provides an easy-to-use environment for interactive, post acquisition analysis and report generation, with powerful technical data management capab

36、ilities. </p><p>　　Which Analysis Tools are Available for Lab VIEW?</p><p>　　NI Lab VIEW already includes a powerful set of tools for analysis. These tools encompass a built-in set of libraries

37、and functions designed specifically for analysis, with which users can address a wide range of applications. Lab VIEW analysis tools cover a broad range of applications. Advanced analysis functions can measure such sign

38、al characteristics as total harmonic distortion, impulse response, frequency response, and cross-power spectrum. Scientists and engineers can also incorporate math</p><p>　　Figure 4. Sound Level Meter Applic

39、ation based on the Sound and Vibration Analysis Toolset</p><p>　　Add-On Tools for Analysis</p><p>　　In addition to the built-in analysis libraries, users rely on add-on toolsets and modules to r

40、educe development time for specialized application needs. By incorporating toolset components into custom applications, users reduce the need for particular expertise commonly associated with development more vertical ap

41、plications such as advanced digital signal processing, sound and vibration measurements, order analysis, image processing, PID control, and simulation. Advanced Signal Processing The S</p><p>　　Joint Time-

42、Frequency Analysis Unlike conventional analysis technologies, the JTFA (joint time-frequency analysis) routines examine signals in both the time and frequency domains simultaneously. JTFA can be applied in almost all ap

43、plications in which the FFT is used, such as biomedical signals, radar image processing, vibration analysis, machine testing, and dynamic signal analysis. However, with JTFA you get more information by analyzing the time

44、 and frequency domains simultaneously. Like the </p><p>　　Functions include full, 1/3, 1/6, 1/12 and 1/24 octave; user-defined sampling frequency; user-defined number of bands; A, B, C weighting in time dom

45、ain; standards compliance; exponential averaging (Slow, Fast, and Custom time constant); cross-power spectrum; frequency response (H1, H2, and H3); coherence; and coherent output power. In addition, the toolset provides

46、additional visualization tools such as waterfall graph, color map graph, octave bar graph, and octave line graph that can be easily </p><p>　　Order AnalysisThe Lab VIEW Order Analysis Toolset provides libra

47、ries to build custom Lab VIEW-based measurement and automation applications with order analysis capabilities for order tracking, order extraction, and tachometer signal processing. The toolset employs Gabor Order Trackin

48、g, a patented algorithm based on the ideas of joint time-frequency analysis. </p><p>　　With the Gabor Order Tracking algorithm, Lab VIEW users can analyze sound, vibration, and other dynamic signals from mec

49、hanical systems with rotating or reciprocating components. It offers flexible order energy selection in the joint time-frequency domain. Additional tools include plotting individual order(s) versus time or rpm, order ext

50、raction tools to separate order-specific signal components from the acquired signal, automatic order selection tools to find and specify the most significant or</p><p>　　ConclusionWith the power and flexibi

51、lity of today’s computers, engineers and scientists have an unprecedented ability to efficiently measure, control, monitor, diagnose, automate, test, and characterize any process. This however is not possible, without th

52、e ability to look at data and extract useful information. National Instruments Lab VIEW and the integrated analysis functions it provides, make up a powerful graphical application development environment designed specif

53、ically for engineers an</p><p>　　http://zone.ni.com</p><p><b>　　中文翻譯</b></p><p>　　Lab VIEW的測量和數(shù)據(jù)分析</p><p>　　因?yàn)長ab VIEW可以和儀器連接，具有強(qiáng)大的數(shù)據(jù)采集能力，自然的基于數(shù)據(jù)流的圖形編程界面，可測

54、量性等，所有的功能都很完善，因此它是一種可選的工具。</p><p><b>　　介紹</b></p><p>　　用戶常常是通過數(shù)據(jù)采集到某個(gè)場合或者是某個(gè)程序來開始他們的工作的。為了從數(shù)據(jù)里獲得有效的信息，確定可行的方法和獲取結(jié)果，就需要對數(shù)據(jù)進(jìn)行操作和分析。不幸的是，數(shù)據(jù)采集的分析和數(shù)據(jù)顯示不是一個(gè)過程。傳統(tǒng)的應(yīng)用軟件包是指一個(gè)應(yīng)用元件，但是很少包括各個(gè)方面，而

55、且又不能達(dá)到完美的解決效果。Lab view就是針對這種有始有終、完全集成的方法需要而設(shè)計(jì)的，所以用戶可以在一個(gè)獨(dú)立的環(huán)境下很輕松地把整個(gè)應(yīng)用過程集成一體。</p><p>　　圖1 Lab VIEW虛擬儀器的前面板框圖</p><p>　　雖然有很多工具在獨(dú)立的場合都可以應(yīng)用，而只有Lab VIEW把圖形化的編程和數(shù)據(jù)采集硬件在PC機(jī)上有機(jī)地結(jié)合起來。虛擬儀器的最大功能正是這種把數(shù)據(jù)采

56、集，數(shù)據(jù)分析和結(jié)果的顯示有效的結(jié)合起來。一臺虛擬儀器由一臺標(biāo)準(zhǔn)工業(yè)計(jì)算機(jī)或者裝有強(qiáng)有力的應(yīng)用軟件的工作站和成本低廉的硬件( 例如插件和驅(qū)動器軟件)組成的，這些一同執(zhí)行傳統(tǒng)的儀器的功能。 這是為什么在很多應(yīng)用場合和程序里用定義為VI（虛擬儀器）的LabVIEW編程的原因。</p><p>　　作為一個(gè)工程應(yīng)用工具，Lab VIEW為研究者，科學(xué)家工程師，學(xué)生和教授提供了上百個(gè)分析函數(shù)。他們可以用這些函更便捷地進(jìn)行智

57、能測量和獲得結(jié)果。</p><p>　　選擇正確的分析方法 用戶以不同的方法把應(yīng)用和編程合并在一起。下面提供一些幫助分析的方法。 在線與脫機(jī)分析 在線分析就是在同種場合下分析所獲得的數(shù)據(jù)。它一般應(yīng)用于這樣的場合：通過改變參數(shù)或執(zhí)行方法在運(yùn)行時(shí)確定方法以及通過這種方法直接顯示結(jié)果。這就是典型應(yīng)用于控制的場合。當(dāng)進(jìn)行在線分析時(shí)，考慮到數(shù)據(jù)采集的數(shù)量和運(yùn)行數(shù)據(jù)的特殊分析原則是很重要的。必須發(fā)現(xiàn)這個(gè)平衡關(guān)系，因?yàn)樗?/p>

58、以很容易計(jì)算而且對應(yīng)用程序不利。其他一些比如參數(shù)必須與測量信號相匹配也是在線分析的例子。 一種情況下就是一路或多路信號不動，但是除了突然的高速跳動之外，它的變化是非常緩慢的。為了減少數(shù)據(jù)量的停滯，必須應(yīng)用較高的采樣率，并且當(dāng)跳動停止后就減少采樣率。通過測量和分析某個(gè)信號的方方面面，這樣就可以在各種情況下應(yīng)用并且能夠使執(zhí)行參數(shù)正常運(yùn)行。雖然這只是一個(gè)例子，但是，還有成千上萬種應(yīng)用場合，比如獲取某種智力度（就是在各種情況下都能夠做出

59、決定）和匹配度，這些都可以通過分析加以應(yīng)用。 數(shù)據(jù)采集的決策方法不常是自動生成的。很常用的是那些在整個(gè)過程中監(jiān)測執(zhí)行并且確定是否如所期望的執(zhí)行的方法，或者是確定是否要調(diào)整變量的</p><p>　　圖 2 基于數(shù)組分析的逐一分析</p><p>　　實(shí)時(shí)的數(shù)據(jù)采集和分析需要更多精簡的穩(wěn)定的設(shè)備。點(diǎn)對點(diǎn)分析是精簡的，穩(wěn)定的，因?yàn)樗苯影巡杉头治黾谝惑w。有了逐一分析，采集和分析過程

60、能更貼近FPGA(可編程序的陣列領(lǐng)域)芯片， DSP芯片，嵌入控制器， CPU 和Asics。</p><p>　　為了更好地理解逐一分析原則的好處，NI 公司建議大家閱讀一篇名為“從Lab VIEW逐一分析的程序開始”的文章。</p><p>　　這篇文章敘述了如何使用VI，包括在Lab VIEW里顯示完整例子。這個(gè)例子說明了逐一分析的簡單和靈活性。</p><p&g

61、t;　　通過增加這些強(qiáng)大的模塊和規(guī)則，用戶可以減少推測工作并且創(chuàng)造在運(yùn)行時(shí)能分析結(jié)果的智能化的過程，提高效率并且更改實(shí)驗(yàn)或運(yùn)行程序的輸入變量。</p><p>　　為了在過程中確定方法，脫機(jī)的應(yīng)用通常不必要為了結(jié)果而獲取實(shí)時(shí)形式。 脫機(jī)的分析應(yīng)用只是要求提供足夠的計(jì)算資源。這些應(yīng)用的主要目的是通過改變多種數(shù)據(jù)設(shè)置來驗(yàn)證整個(gè)過程中影響變量的原因和結(jié)果。這些應(yīng)用通常需要輸入二進(jìn)制數(shù)字或ASCII文件和商業(yè)數(shù)據(jù)庫，比如

62、，Oracle，Access和其他可用的QL/ODBC數(shù)據(jù)庫。一旦數(shù)據(jù)輸入到Lab VIEW，用戶就可以運(yùn)用上百個(gè)可用的分析規(guī)則，操作數(shù)據(jù)，以特殊的格式重排來獲得播放的目的。Lab VIEW提供了訪問任何一種文件格式和數(shù)據(jù)庫的功能，并把他們連于具有強(qiáng)大播放功能的工具上，如NI Diadem和Microsoft Office 的播放工具箱，并且執(zhí)行最新的分享數(shù)據(jù)的技術(shù)，例如XML，Web的數(shù)據(jù)贈送和ActiveX。</p>

63、<p><b>　　計(jì)劃和交互式分析</b></p><p>　　作為Lab VIEW用戶，科學(xué)家和工程師對于如何在上百種設(shè)備中獲取數(shù)據(jù)的方法是非常熟悉的。他們建造了智力應(yīng)用，當(dāng)這個(gè)應(yīng)用運(yùn)行時(shí)，就會演示在線分析并顯示結(jié)果。另外，他們也意識到了單純?yōu)榱嗽诰€可視化的數(shù)據(jù)采集和處理是遠(yuǎn)遠(yuǎn)不夠的。用戶通常在硬盤驅(qū)動和數(shù)據(jù)庫里存儲上百萬個(gè)字節(jié)的數(shù)據(jù)。之后從1到數(shù)百個(gè)運(yùn)行的程序里，用戶著手選出

64、信息，比較結(jié)果，并且對整個(gè)過程進(jìn)行適當(dāng)?shù)淖兓?，直到得到預(yù)期的效果。采集如此大量的數(shù)據(jù)是相對比較容易的，并且可以使速度快到讓人難以控制。實(shí)際上，只要有快速的數(shù)據(jù)采集板和足夠的通道，就可以在一毫秒里采集到上千個(gè)數(shù)值。搞懂所有的數(shù)據(jù)并不是一件小事。工程師和科學(xué)家通常期望提出報(bào)告，制圖，并且最后確定估計(jì)和結(jié)論與實(shí)驗(yàn)數(shù)據(jù)是否一致。 沒有正確的工具，這就容易成為一項(xiàng)令人生畏的任務(wù)，導(dǎo)致失去的生產(chǎn)力。</p><p>　　為了

65、簡化分析尺寸的過程，Lab VIEW 程序員建立了對話框和接口的應(yīng)用程序，以便于其他人使用，用所采集的數(shù)據(jù)演示具體的分析例行程序。通過建造這類應(yīng)用，用戶可以在他們的程序里建造交互性的程序。為了效率，程序員必須有用戶感興趣的廣博的知識信息和這類型的分析。</p><p>　　圖3基于共同時(shí)間頻率分析功能的VI</p><p>　　用Lab VIEW， 在把它儲存對磁盤之前，用戶可以對數(shù)據(jù)進(jìn)行

66、簡化和格式化，以便當(dāng)存儲數(shù)據(jù)被為更進(jìn)一步的分析時(shí)，它更易于處理。 Lab VIEW也提供為產(chǎn)生基于結(jié)果報(bào)告的數(shù)百個(gè)功能，并從所采集的數(shù)據(jù)里獲取信息。</p><p>　　國家儀器提供了用Lab VIEW高度集成和為提高合作工程而設(shè)計(jì)的工具。NI Diadem就是這樣一種工具，它提供了簡單易用的交互式環(huán)境，采集分析和播放功能，擁有強(qiáng)大的技術(shù)數(shù)據(jù)控制能力。</p><p>　　哪種分析工具適合

67、Lab VIEW？</p><p>　　NI 包括一整套強(qiáng)大的分析工具。這些工具包含一套內(nèi)置的模塊和準(zhǔn)們?yōu)榉治龆O(shè)計(jì)的函數(shù)，有了這些工具，用戶就可以進(jìn)行廣闊的分析。</p><p>　　Lab VIEW分析工具包含了很廣闊的應(yīng)用范圍。高級的分析函數(shù)能夠測量信號的特征如波形失真，脈沖響應(yīng)，頻率響應(yīng)和功率譜?？茖W(xué)家和工程師也可以在他們的應(yīng)用中運(yùn)用數(shù)學(xué)和數(shù)字分析，目的是解決一些方程，最優(yōu)化，方根

68、和其他一些數(shù)學(xué)問題。</p><p>　　盡管用戶可以自己運(yùn)用這些函數(shù)，但是讓他們簡單快速解決問題的不是工具，而是內(nèi)置函數(shù)。用這些函數(shù)的好處就是不必為了理解潛在的理論而去創(chuàng)建這些模塊。</p><p>　　圖4 基于聲音和振動分析聲卡的應(yīng)用</p><p><b>　　分析的附加工具 </b></p><p>　　除

69、了內(nèi)置分析庫之外，用戶也可以在特殊的應(yīng)用場合使用附加的工具包以減少開發(fā)時(shí)間。通過把工具包組成部分編入定制的應(yīng)用程序，用戶可以不必懂得專業(yè)知識，就可以進(jìn)行高級數(shù)據(jù)處理，聲音和振動測量，順序分析，圖像分析，PID控制和模擬。</p><p><b>　　高級信號處理</b></p><p>　　信號處理工具包提供了為高級數(shù)字信號處理而專門設(shè)計(jì)的函數(shù)。這個(gè)函數(shù)分成三種：時(shí)間

70、頻率分析，子波分析，高分辨率的波譜分析。此外，這個(gè)工具包還提供圖形應(yīng)用，用這些圖形，用戶就可以有效地進(jìn)行數(shù)字濾波設(shè)計(jì)。聯(lián)合時(shí)頻分析</p><p>　　與傳統(tǒng)的分析技術(shù)不同，聯(lián)合時(shí)頻分析原則是同時(shí)進(jìn)行時(shí)間和頻率的信號檢測。聯(lián)合時(shí)頻分析在許多場合中都可以應(yīng)用，比如生物醫(yī)學(xué)信號，雷達(dá)圖像處理器，振動分析，機(jī)器測量和動態(tài)信號測量。因此，用聯(lián)合時(shí)頻分析，你可以同時(shí)得到更多時(shí)間和頻率方面的信息。 和典型的傅立葉分

71、析一樣，聯(lián)合時(shí)頻分析是由良種主要的方法即線性和二次方組成的。線性方法包括短時(shí)傅立葉方式和Gabor擴(kuò)張（與短時(shí)傅立葉形式相反）。Lab VIEW用戶可以利用這些線性形式，把信號從時(shí)間領(lǐng)域傳誦到聯(lián)合時(shí)頻分析領(lǐng)域。這些原則對于減少噪音來說是極其強(qiáng)大和有力的。二次的方法包含適合的光譜圖，蔡威廉斯分布，圓錐形成的分布， Gabor基于擴(kuò)大的光譜圖(也叫做Gabor光譜圖)，基于STFT的光譜圖和威格納利分布。用戶應(yīng)用這些二次方形式容易看出一個(gè)信

72、號的功率譜是怎樣逐步形成。Gabor光譜圖形成了高分辨率和橫截面式接口之間的平衡。</p><p><b>　　子波</b></p><p>　　子波是一種相對較新的信號處理方法。子波變換被作為過濾器的補(bǔ)充把一個(gè)信號分解成為多根信號帶。它在一個(gè)或多個(gè)子帶中把信號分隔開并仍保留信號的特征。因此，用子波變換的最大優(yōu)點(diǎn)就是能夠很容易地提取信號的特征。在許多場合中，當(dāng)涉及特征

73、提取和噪聲降低時(shí)，子波變換勝過傳統(tǒng)的FFT。因?yàn)樽硬ㄗ儞Q能選出顯著特征，因此在許多數(shù)據(jù)壓縮場合中都可以進(jìn)行應(yīng)用。比如，回聲探測，圖樣識別，邊緣探測，取消，語音識別，質(zhì)地分析，圖像壓縮等。高分辨率的光譜分析</p><p>　　光譜分析的最初工具就是快速傅立葉變換。對高分辨率光譜來說，快速傅立葉方法需要很多的采樣點(diǎn)。然而，因?yàn)槿狈φ鎸?shí)的數(shù)據(jù)或用戶必須確信信號的光譜特征是否不會改變數(shù)據(jù)信號的復(fù)制，數(shù)據(jù)的設(shè)置是有限的

74、。對于數(shù)據(jù)采樣點(diǎn)有限的情況來說，Lab VIEW用戶可以用基于模塊的方法來確定光譜的特征。用這種技術(shù)，用戶可以確定合適的信號模塊和模塊的系數(shù)?；谶@種模塊的方法，可以在所給的有限數(shù)據(jù)中預(yù)測遺漏點(diǎn)，從而達(dá)到獲取高分辨率光譜的目的。另外，基于模塊分析的方法也可以用于估計(jì)幅度，階段，阻滯因素和阻滯的頻率。高分辨率光譜分析的方法也可以用于生物醫(yī)學(xué)研究，經(jīng)濟(jì)學(xué)，幾何學(xué)，噪音，振動和語音分析等場合。</p><p><

75、b>　　聲音和振動分析</b></p><p>　　Lab VIEW的聲音和振動工具包括了適合于工程單位的函數(shù)和圖像工具,包括校準(zhǔn),頻率分析,瞬時(shí)分析,聲音測量和音度的分析.函數(shù)包括全部的,1/3,1/6,1/12,1/24音度,用戶定義的采樣頻率,采樣點(diǎn)數(shù),標(biāo)準(zhǔn)一致的時(shí)域A,B,C,指數(shù)平均化(慢,快,時(shí)間常數(shù)),功率譜,頻率反應(yīng)(H1, H2, 和H3);連貫性以及前后一致的輸出功率.此外

76、,工具包還提供了另外的圖形化工具,比如,瀑布圖,顏色地圖,音度圖以及容易在Lab VIEW前面板應(yīng)用的線圖.命令分析</p><p>　　Lab VIEW命令分析工具提供了命令庫,以創(chuàng)建用命令跟蹤,命令提取以及轉(zhuǎn)速表信號處理等命令分析方式來進(jìn)行基于Lab VIEW的測量和自動化應(yīng)用.此工具包括了Gabor命令跟蹤和基于聯(lián)合時(shí)頻分析的專利運(yùn)算. 有了Gabor命令跟蹤運(yùn)算, Lab VIEW用戶可以進(jìn)行聲

77、音振動分析,以及其他一些力學(xué)系統(tǒng)如轉(zhuǎn)動或往復(fù)位移等的動態(tài)信號分析.它為聯(lián)合時(shí)頻分析提供了靈活的命令選擇.附加工具包括畫出時(shí)間與轉(zhuǎn)速的關(guān)系圖,為從所采集的信號中分離出命令的具體信號的信號提取工具以及為查找重要命令供用戶分析用的自動命令選擇工具.</p><p><b>　　圖像處理</b></p><p>　　應(yīng)用Lab VIEW的IMAQ版本，工程師和科學(xué)家能創(chuàng)造和使

78、用彩色模式匹配的原型機(jī)器應(yīng)用。彩色模式匹配迅速找到一幅彩色圖像內(nèi)的引用模式并且克服很難認(rèn)出彩色圖像的傳統(tǒng)的單色的照相機(jī)出現(xiàn)的路障。另外，IMAQ 版本軟件增強(qiáng)Lab VIEW高級機(jī)器視覺和圖像處理能力。你能在要求極其可靠高速系統(tǒng)的機(jī)器和工廠和實(shí)驗(yàn)室自動化操作中使用IMAQ 版本。</p><p>　　Lab VIEW用戶能夠利用國家儀器的發(fā)展模塊來發(fā)展機(jī)器圖像和科學(xué)成像。模塊包括IMAQ 版本的建筑者，一個(gè)的交互

79、式環(huán)境下沒有編程的原型應(yīng)用和IMAQ版本，一個(gè)有強(qiáng)大功能的圖像處理庫。 IMAQ 版本的建筑者和IMAQ 緊緊地結(jié)合簡化了軟件開發(fā)。IMAQ 版本建筑者能自動產(chǎn)生包含相同功能的一系列操作原型的IMAQ 圖像即Lab VIEW的程序框圖。 用戶能把圖像并入自動化或者生產(chǎn)試驗(yàn)應(yīng)用中，可以包括運(yùn)轉(zhuǎn)控制，儀器控制，以及數(shù)據(jù)采集。</p><p><b>　　PID控制</b></p>

80、<p>　　Lab VIEW的PID 控制工具箱給控制應(yīng)用添加復(fù)雜的控制算法。在Lab VIEW中，通過將PID、工具箱的邏輯控制功能和分析功能合并起來，用戶可以迅速地為自動控制編程。另外，通過把這些控制工具和NI數(shù)據(jù)采集硬件結(jié)合起來，用戶能建立強(qiáng)有力，堅(jiān)固的控制系統(tǒng)。這些Lab VIEW的控制應(yīng)用能與Lab VIEW的實(shí)時(shí)控制模塊相結(jié)合以適合實(shí)時(shí)控制應(yīng)用。</p><p><b>　　模擬&

81、lt;/b></p><p>　　Lab VIEW 模擬接口工具箱給國家儀器控制設(shè)計(jì)工程師在Lab VIEW與數(shù)學(xué)模塊Simulink軟件之間建立了一個(gè)緊密的連接。有這些綜合工具，工程師就可以把準(zhǔn)確無誤的構(gòu)想從軟件的概念運(yùn)用到實(shí)踐上來。這個(gè)工具箱包括基于Lab VIEW的用戶界面零部件，這些元件可以插入simulink環(huán)境和工具中，這個(gè)工具是通過數(shù)學(xué)工作站輸入控制模塊到Lab VIEW上的。工程師然后能拿這

82、些模塊并且把他們和多種輸入/輸出結(jié)合起來。Lab VIEW用戶也能利用Lab VIEW系統(tǒng)模擬和設(shè)計(jì)工具箱，這些可以提供工具設(shè)計(jì)，模擬，分析，并且優(yōu)化線性和非線性控制系統(tǒng)。用這些工具， 用戶能通過使用VI仿效的控制工程符號加速系統(tǒng)設(shè)計(jì)， 例如H(s)傳遞函數(shù)，1 /s綜合，z延遲等等。驗(yàn)證系統(tǒng)設(shè)計(jì)之后，用戶能迅速結(jié)合Lab VIEW分析功能和DAQ 硬件實(shí)現(xiàn)一個(gè)現(xiàn)實(shí)世界系統(tǒng)。</p><p><b>　

83、　結(jié)論</b></p><p>　　由于今天的計(jì)算機(jī)的功能的強(qiáng)大和靈活，工程師和科學(xué)家有一個(gè)空前的能力可以有效地測量，控制，檢測，診斷，自動化，測試，并且表現(xiàn)出過程的特性。但是這是不可能，沒有能力瀏覽數(shù)據(jù)并且選出有用的信息。國家儀器Lab VIEW和它提供的綜合分析功能，擁有強(qiáng)大的圖形界面功能的開發(fā)環(huán)境，是特別為工程師和科學(xué)家設(shè)計(jì)的。Lab VIEW提供從設(shè)計(jì)到生產(chǎn)處理整個(gè)過程中解決問題的辦法，不管在