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內(nèi)蒙古科技大學(xué)畢業(yè)設(shè)計(jì) 說明書(畢業(yè) 論文 ) 畢業(yè)設(shè)計(jì)論文 虛擬無紙記錄儀 內(nèi)蒙古科技大學(xué)畢業(yè)設(shè)計(jì) 說明書(畢業(yè) 論文 ) 摘 要 目前,在電子測量和自動化控制領(lǐng)域,虛擬儀器技術(shù)取得了巨大的發(fā)展。它充分利用計(jì)算機(jī)技術(shù),在基本硬件的支持下,通過調(diào)用相應(yīng)的軟件模塊來完成數(shù)據(jù)的采集、控制、分析、處理、以及結(jié)果存儲和顯示,從而完成各種傳統(tǒng)儀器的功能。本文從探索研究的角度出發(fā),利用虛擬儀器技術(shù)完成一種虛擬無紙記錄儀的設(shè)計(jì),使其能夠?qū)σ话愕碾妷盒盘枌?shí)現(xiàn)采集、測量、結(jié)果存儲和顯示等功能。 本設(shè)計(jì)采用模塊化的軟件設(shè)計(jì)思想編寫,每個(gè)功能的實(shí)現(xiàn)由 一個(gè)模塊完成。設(shè)計(jì)采用的軟件為 美國 NI公司的 LabVIEW, 是 一種基于圖形化編程語言的開發(fā)環(huán)境,采用的硬件是 PCI6221 數(shù)據(jù)采集卡 。 經(jīng)過測試,本文設(shè)計(jì)的虛擬無紙記錄儀可以完成信號的采集、顯示、 波形存儲讀取,以及 信號的均值、均方根值、幅值等參數(shù)測量 功能。充分體現(xiàn)了計(jì)算機(jī)的強(qiáng)大功能 和LabVIEW 軟件設(shè)計(jì)的靈活性。 關(guān)鍵詞: 記錄儀 ; 虛擬儀器 ; 數(shù)據(jù)采集 ; LabVIEW 內(nèi)蒙古科技大學(xué)畢業(yè)設(shè)計(jì) 說明書(畢業(yè) 論文 ) Design of Virtual Paperless Recorder based on LabVIEW Abstract At present the virtual instrument used widely in the measure and automatic control area. It make much of puter technology, bines the virtual instrument’s hardware with software acplish data acquisition, data analysis, then store the digital and display the result on the screen, achieve the function of traditional instrument. In this chapter the author used virtual instrument to design the virtual paperless recorder, it consists data acquisition, measurement, storage and display. We used the design of modularization software, each function can acplish by one module. The software used in the paper is LabVIEW, it is a kind of software based on graphic language. The hardware of this design is the PCI6221 of data acquisition card. After debugging, the virtual paperless recorder by LabVIEW would plete data acquisition, wave storage, display and read the data which is stored. Moreover, this virtual paperless recorder also have the function of measurement about fmplitude, average and RMS values. It well explain the strong function of puter and the various design of software. Key words: Paperless recorder。 Virtual instrument。 Data acquisition。 LabVIEW 內(nèi)蒙古科技大學(xué)畢業(yè)設(shè)計(jì) 說明書(畢業(yè) 論文 ) 目 錄 摘 要 ........................................................................................................................................ II Abstract .....................................................................................................................................III 第一章 緒論 .............................................................................................................................. 1 虛擬儀器的概述 ......................................................................................................... 1 虛擬儀器的基本概念 ...................................................................................... 1 虛擬儀器的構(gòu)成 .............................................................................................. 2 虛擬儀器的特點(diǎn) .............................................................................................. 3 虛擬儀器的現(xiàn)狀和發(fā)展 .................................................................................. 3 虛擬無紙記錄儀 的 介紹 .................................................................................. 5 課題研究的背景 ......................................................................................................... 5 課題研究的方法 ......................................................................................................... 6 第二章 虛擬無紙記錄儀的總體設(shè)計(jì)方案 .............................................................................. 7 總體設(shè)計(jì)思路 ............................................................................................................. 7 軟件開發(fā)平臺 ............................................................................................................. 7 LabVIEW 簡介 ................................................................................................. 7 LabVIEW 的運(yùn)行機(jī)制 ..................................................................................... 8 LabVIEW 的操作模板 ................................................................................... 10 調(diào)試技術(shù) .........................................................................................................11 數(shù)據(jù)采集卡的選用 ................................................................................................... 13 數(shù)據(jù)采集卡的簡介 ........................................................................................ 13 數(shù)據(jù)采集 卡的主要組成部分 ........................................................................ 13 內(nèi)蒙古科技大學(xué)畢業(yè)設(shè)計(jì) 說明書(畢業(yè) 論文 ) 數(shù)據(jù)采集卡的參數(shù)設(shè)置 ................................................................................ 14 PCI6221 數(shù)據(jù)采集卡 ...................................................................................... 15 第三章 虛擬無紙記錄 儀的數(shù)據(jù)采集系統(tǒng) ............................................................................ 17 數(shù)據(jù)采集系統(tǒng)的構(gòu)成 ............................................................................................... 17 數(shù)據(jù)采集的實(shí)現(xiàn) ....................................................................................................... 20 信號類型 ........................................................................................................ 20 采樣頻率、抗混疊濾波器和樣本數(shù) ............................................................ 21 信號調(diào)理的實(shí)現(xiàn) ............................................................................................ 25 采集信號的條件 ............................................................................................ 26 信號的采集方法 ............................................................................................ 27 第四章 虛擬無紙記錄儀軟件設(shè)計(jì) ........................................................................................ 29 主程序設(shè)計(jì) ............................................................................................................... 29 數(shù)據(jù)采集模塊 ........................................................................................................... 31 信號測量模塊 ........................................................................................................... 34 波形的存儲和讀取模塊 ........................................................................................... 36 測試結(jié)果 ...............