【正文】
reduces uniformly and proportionally to the applied pressure until it reaches to SWNT39。使用斷點(diǎn)工具可以在程序的某一地點(diǎn)中止程序執(zhí)行,用探針或者單步執(zhí)行方式查看數(shù) 據(jù)。 ,利用快捷工具欄中的 “高亮執(zhí)行 ”按鈕,單擊該按鈕,該按鈕圖標(biāo)變成高亮形式,再單擊 “運(yùn)行 ”按鈕,程序就以較慢的速度運(yùn)行。仿真檢驗(yàn)在實(shí)測(cè)檢驗(yàn)之前進(jìn)行,是虛擬儀器所特有的優(yōu)勢(shì),因?yàn)樗鼘?duì)反復(fù)檢驗(yàn),調(diào)試,不斷完善改進(jìn)虛擬儀器極為方便,是傳統(tǒng)儀器無(wú)法采用的檢驗(yàn)手段。有如下兩種檢驗(yàn)方式。 上面介紹了 Labview 的特點(diǎn)與發(fā)展,下面介紹虛擬儀器是怎么樣設(shè)計(jì)的 通常,一個(gè)虛擬儀器的設(shè)計(jì)步驟如下: ( 1).在前面板上設(shè)計(jì)窗口放置控件,在前面板開發(fā)窗口使用工具模板中的相應(yīng)工具,從控制模板中取用和放置好所需控件,進(jìn)行控件屬性參數(shù)設(shè)置,標(biāo)貼文字說(shuō)明標(biāo)簽。 Labiew 的功能不斷豐富和強(qiáng)大, Labiew 用來(lái)進(jìn)行數(shù)據(jù)采集與控制,數(shù)據(jù)分析和數(shù)據(jù)表達(dá),使工程師和科學(xué)家能充分利用 PC 的功能,快速簡(jiǎn)便的完成自己的功作。 許多使用功能強(qiáng)大的圖形化編程語(yǔ)言 LabVIEW 的用戶親切的稱之為 “G”語(yǔ)言(取自graphical), LabVIEW 能夠讓你的開發(fā)效率提高 幾個(gè)數(shù)量級(jí)。 NI 公司退出一個(gè)專業(yè)圖形化編程軟件來(lái)設(shè)計(jì)開發(fā)虛擬儀器,就是 Labiew. Labview 是 Laboratory Virtual Instrument Engineering Workbench 的英文 縮寫,它是一種圖形化的編程環(huán)境,使用圖形化的符號(hào)來(lái)創(chuàng)建程序(通過(guò)連線把函數(shù)節(jié)點(diǎn)連接起來(lái),數(shù)據(jù)就是在這些連線上流動(dòng)的);在 這點(diǎn)上,它不同于傳統(tǒng)的文本編程語(yǔ)言像 C, C++, 或者 Java。s highlight the implementation of button, click the button, the button icon bees highlighted form, and then click Run button, the program on a slower speed. The implementation of the code was not grayed out after the implementation of the code highlighting, and display data on the value of the data stream. This allows the data flow, and track the implementation of the procedures. c. breakpoints and singlestep, in order to check the program logic error, you may want to program a block diagram node in a node implementation. Breakpoint tool to use a certain location in the program to suspend program execution, using probes or singlestep ways to view the data. d. set the probe, you can view the block diagram by setting the probe to open a connection procedure by a data value. (6). data observed, when the inspection observations were found to have an error, the mouse click Highlight Execution button, and observe the various nodes in the data stream values. (7). named Save, save the designed I. 翻譯(一): Labiew 的程序設(shè)計(jì) 壓力開關(guān)測(cè)試系統(tǒng),涉及到一個(gè)重要的概念:虛擬儀器。 譯文題目: 基于 LabVIEW 的壓力開關(guān)測(cè)試系統(tǒng)設(shè)計(jì) 外文資料(一): Labview programming The pressure switch test system, involving an important concept: the virtual instrument. Virtual instrument is the United States National Instruments Corporation (NI) out of the concept of modern puter technology and instrumentation technology indepth integration of the product. Virtual Instrument virtual There are two levels of meaning: 1. A virtual control panel, two virtual test and measurement and analysis. Virtual instrument is characterized by highperformance, scalability strong little development time, seamless integration. NI39。虛擬儀器是美國(guó)國(guó)家儀器公司(簡(jiǎn)稱 NI)退出的概念,是現(xiàn)代計(jì)算機(jī)技術(shù)和儀器技術(shù)深層次結(jié)合的產(chǎn)物。然而,LabVIEW 不僅僅是一種編程語(yǔ)言,它是專門為那些工作中需要大量編程的工程師和科學(xué)家們?cè)O(shè)計(jì)的一種交互式的程序程開發(fā)和執(zhí)行的系 統(tǒng)。使用傳統(tǒng)語(yǔ)言可能需要幾周或者幾個(gè)月才能完成的程序,如果用 LabVIEW編寫,幾個(gè)小時(shí)就能完成,其中一個(gè)原因是LabVIEW 是專為用戶 設(shè)計(jì)的,用來(lái)進(jìn)行測(cè)量,分析數(shù)據(jù)和顯示結(jié)果。 Labview 主要特點(diǎn)可以概括如下: 1圖形化的儀器變成環(huán)境 2 內(nèi)置的程序編譯器,使運(yùn)行速度加快 3靈活的程序調(diào)試手段 4 支持多種系統(tǒng)平臺(tái) 5 支持 DDE 等功能。 ( 2).在流程圖編輯窗口,放置節(jié)點(diǎn)、圖框,在流程圖編輯窗口,使用工具模板中相應(yīng)工具,從功能模板中取 用并放置好所需圖標(biāo),它們是流程圖中的 “節(jié)點(diǎn) ”、 “圖框 ”。 :不使用 I/O接口硬件設(shè)備。 ( 5).程序調(diào)試技術(shù),利用快捷工具欄中的 “運(yùn)行 ”、 “高亮執(zhí)行 ”、 “單步執(zhí)行 ”、 “斷點(diǎn)設(shè)置 ”進(jìn)行以下程序調(diào)試步驟。沒有被執(zhí)行的代碼灰色顯示,執(zhí)行后的代碼高亮顯示,并顯示數(shù)據(jù)流上的數(shù)據(jù)值。,可以通過(guò)設(shè)置探 針開查看框圖程序經(jīng)某一根連線的數(shù)據(jù)值。s first transition addition, SWNT kinks,bees unstable and collapses on a ground plane due to bending phenomenon is a function of SWNT diameter. Bending loads can be generated by inducing a voltage between SWNT and a conductive ground plane. Therefore ,by inducing a certain Pullin voltage relative to a certain diameter(pressure), SWNT does not collapse until the applied pressure reaches to a certain amount which causes a certain SWNT diameter this case, because of SWNT collapse on the ground plane, there will be a connection between them closing an electric this study, these characteristics are employed to introduce a tuneable pressure switch. This type of pressure switch,in parison to previous presented one, uses only one SWNT for switching, is able to sense pressure with higher resolution and has a much simpler system. Key words:Single wall carbon nanotube, pullin voltages, electrostatic bending forces, kink, phase transition, transient pressure INTRODUCTION Single Wall Carbon Nanotubes(SWNTs) has novel mechanical properties and behaviors which have attracted many considerations and studies recently. Under hydrostatic Pressure, SWNT39。s. However, the number of used SWNT39。s initial diameter (at zero pressure) and E is its effective young Modulus () To calculate the Pullin