【正文】 平頂山學院畢業(yè)論文設計說明書基于虛擬儀器技術的多功能信號發(fā)生器設計摘 要 虛擬儀器技術是將儀器技術、計算機技術、總線技術和軟件技術緊密的融合在一起，利用計算機強大的數(shù)字處理能力實現(xiàn)儀器的大部分功能，打破了傳統(tǒng)儀器的框架，形成的一種新的儀器模式。本設計采用NI USB6211數(shù)據(jù)采集卡，將虛擬儀器技術用于多功能信號發(fā)生器的設計。該系統(tǒng)具有生成正弦波、方波、三角波、鋸齒波及PWM(Pulse Width Modulation)波的功能。本文首先概述了信號發(fā)生器及虛擬儀器技術在國內(nèi)外的發(fā)展及趨勢，然后介紹了信號發(fā)生器的相關理論及信號發(fā)生器的基本原理框圖，并探討了虛擬儀器的總線及其標準、框架結構、LABVIEW開發(fā)平臺。在分析本系統(tǒng)功能需求的基礎上，介紹了數(shù)據(jù)采集卡、LABVIEW的編程模式等設計中所涉及到的硬件和技術。證明本文很有參考價值。關鍵詞： 虛擬儀器，數(shù)據(jù)采集卡，信號發(fā)生器，LABVIEW The design of multifunctional signal generator base on virtual instrument technologyABSTRACT Virtual instrument technology is formed by the instrument technology, puter technology, bus technology and software technology. Powerful digital processing’s ability of puter is used to achieve the main functions of instrument. Virtual instrument broke the framework of the traditional instruments, and built a new device model. This design uses NI USB6211 data acquisition card. The virtual instrument technology has been utilized in the design of multifunctional signal generator. The system has ability to produce sine wave, square wave, and triangle wave, saw tooth wave and PWM (Pulse Width Modulation) wave. This article summarizes the development and trend of the signal generator and virtual instrument at home and abroad at first. And then introduces the theory of signal generator and gives a basic block diagram of signal generator, also the frame structure and LABVIEW development platform of the virtual instrument with the inquiry of the bus’s standard. Based on the analysis of this system’s functional requirements, this article introduces the hardware and technology which involved in design of the data acquisition card and the LABVIEW programming modes. Testify this article have great reference value.Key Words： Virtual Instruments， Data Acquisition Cards， Signal Generators， LABVIEW 目錄第一章 緒論 1 引言 1 信號發(fā)生器的發(fā)展史............................................ 1 虛擬儀器的發(fā)展趨勢............................................ 2 .3第二章 虛擬儀器 ...4 虛擬儀器的特點及機制 4...................................4...........................................4.....................................................5 I/O接口設備...................................................6.......................................................8................................................8.............................................8——LABVIEW..............................9.............................9第三章系統(tǒng)設計的硬件平臺...............................................11 PC機.............................................................11.................................................11.........................................11(DAQ卡)的組成......................................12 NI USB6211數(shù)據(jù)采集卡........................................12第四章系統(tǒng)總體的設計與實現(xiàn).............................................13.........................................13.....................................................13.......................................13...............................................13.......................................13..................................16...............................................18...................................................18.............................................18結論.......................