3、总线LabVIEWword完美格式专业资料ABSTRACTThis paper gives a brief introduction of the functions of virtual instruments from its originand development. After comparing the virtual instruments and the traditional instruments, it wholly introduces the designing technology o
4、f 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
5、 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-VX
6、I and PXI. From the aspect of software, it introduces the most representativefiguralized compiling software---LabVIEW, 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 a
7、ndshow the amplitude—frequency characteristic and phase—frequency characteristic curves.Besides,thepaperdesignsaprogramthatcanrecordandplaysound.Inaddition,basedonthemarket,thispaperillustratestheinvestmentofvirtualinstruments,layingfoundationforfurtherresea
