关于虚拟仪器的论文.docVIP

PAGE PAGE i 虚拟仪器技术论文 论文题目 基于LabVIEW的虚拟仪器技术及应用 学生姓名 殷兴 学 号 1422110227 专 业 能源与动力 院 (系) 国际学院 任课教师 王会清  摘 要 本文从虚拟仪器的起源、发展入手，简单介绍虚拟仪器的功能，比较虚拟仪器与传统仪器的不同之后，全面的介绍了虚拟仪器设计技术,并用软件仿真的方法设计了一台虚拟仪器，实现了从数据采集到数据分析的全过程。 虚拟仪器的设计分成两个方面。硬件方面，本文从最基本的传感器、信号调理开始介绍数据采集过程以及DAQ板卡。除此之外，本文还介绍了虚拟仪器总线技术，重点为专用于虚拟仪器的VXI总线系统以及PXI总线系统 。软件方面，主要利用现今最有代表性的图形化编辑软件——LabVIEW，并用之模拟从DAQ板卡中采集到一路带有均匀白噪声的正弦信号，显示其波形，并分析、显示其幅频特性曲线以及相频特性曲线。另外本文还根据LabVIEW中的子程序，实现了语音信号的录音与播放。 本文还从市场出发对虚拟仪器的配置投资做了具体阐述，指明了构造虚拟仪器平台所需要的投资，为今后的学习工作打下了基础。并对国内外虚拟仪器的部分应用案例作了介绍，指出虚拟仪器是仪器历史的一次革命。 关键词 虚拟仪器 数据采集 总线 LabVIEW ABSTRACT This?paper?gives?a?brief?introduction?of?the?functions?of?virtual?instruments?from?its?origin and?development.?After?comparing?the?virtual?instruments?and?the?traditional?instruments,?it? wholly?introduces?the?designing?technology?of?virtual?instruments?and?designs?a?virtual? instrument?by?software?emulate,?realizing?the?whole?process?from?data?acquisition?to?data? analysis. The?design?of?virtual?instrument?is?divided?into?two?parts:?software?and?hardware.?From?the?aspect?of?hardware,?this?paper?introduces?the?data?acquisition?process?and?the?DAQ?boardcard? from?the?fundamental?sensors?and?signal?conditioning?and?then?further?introduces?the?bus? technology?of?virtual?instruments,?with?the?emphasis?on?virtual?instruments’?unique?bus? technology-VXI?and?PXI.?From?the?aspect?of?software,?it?introduces?the?most?representative figuralized?compiling?softwareLabVIEW,?which?is?used?to?imitate?a?group?of?sine?wave?signal?with?white?noise?signal?collected?from?a?DAQ?boardcard,?show?the?wave?shape?,?analyze?and show?the?amplitude—frequency?characteristic?and??phase—frequency?characteristic?curves. Besides, the paper designs a program that can record and play sound. In addition, based on the market, this paper illustrates the investment of virtual instruments, laying foundation for further research and points out that virtual instruments launches a revolution in the history of instruments. KEY WORDS Virtua