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《基于虛擬儀器的高速數(shù)據(jù)采集系統(tǒng)的研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、華中科技大學(xué)碩士學(xué)位論文基于虛擬儀器的高速數(shù)據(jù)采集系統(tǒng)的研究姓名：杜秋姣申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：物理電子學(xué)指導(dǎo)教師：吳長(zhǎng)發(fā)20041112摘要目前數(shù)據(jù)采集技術(shù)越來(lái)越廣泛應(yīng)用的同時(shí)人們對(duì)數(shù)據(jù)采集的各項(xiàng)指標(biāo)提出了更高的要求現(xiàn)在通用的高速數(shù)據(jù)采集卡一般多是PCI卡或ISA卡存在安裝麻煩價(jià)格昂貴可擴(kuò)展性差在一些電磁干擾性強(qiáng)的測(cè)試現(xiàn)場(chǎng)無(wú)法專門對(duì)其做電磁屏蔽使數(shù)據(jù)失真等缺點(diǎn)本文采用一種新型的通信標(biāo)準(zhǔn)USB研制出一種高速數(shù)據(jù)采集卡并成功地應(yīng)用到虛擬儀器的開發(fā)上硬件是一外置式的密封設(shè)備軟件具有很好的用戶圖形界面整個(gè)系統(tǒng)功能齊全操作簡(jiǎn)單采樣速度24MB/s達(dá)到國(guó)內(nèi)先進(jìn)水平本文首先簡(jiǎn)單論述了數(shù)據(jù)采集的基
2、本理論數(shù)據(jù)采集的過(guò)程兩種采樣方式即實(shí)時(shí)采樣和等效時(shí)間采樣接著詳細(xì)論述了高速數(shù)據(jù)采集系統(tǒng)的硬件設(shè)計(jì)方案包括數(shù)據(jù)采集系統(tǒng)的組成結(jié)構(gòu)形式系統(tǒng)的通道方案接口方案和硬件設(shè)計(jì)并且對(duì)系統(tǒng)所使用的主要芯片和相關(guān)技術(shù)做了說(shuō)明重點(diǎn)論述了USB體系結(jié)構(gòu)USB的傳輸方式和USB2.0的主要特點(diǎn)本文對(duì)固件程序進(jìn)行了開發(fā)對(duì)框架程序和功能實(shí)現(xiàn)程序作了一定的說(shuō)明和描述在軟件方面本文還設(shè)計(jì)調(diào)試通過(guò)了驅(qū)動(dòng)和應(yīng)用程序并以LabVIEW軟件平臺(tái)展示了高速數(shù)據(jù)采集系統(tǒng)的測(cè)試結(jié)果本文研制的高速數(shù)據(jù)采集系統(tǒng)的硬件和軟件均已達(dá)到設(shè)計(jì)的要求并已安裝在中國(guó)地質(zhì)大學(xué)研制的虛擬儀器上實(shí)際運(yùn)行關(guān)鍵詞高速數(shù)據(jù)采集系統(tǒng)CPLDUSBWDM驅(qū)動(dòng)程
3、序IABSTRACTAtpresent,thedatacollectiontechnologyhasgainedbroaderapplication.Atthesametime,peoplebringhighertargetagainstthedataacquisitionindex.Nowadays,theuniversalhigh-speeddatacollectioncardcommonlyadoptsPCIorISAcard.Ithastheshortcomingsasfollows:difficulttoinstall;highprices;poorexpansibilit
4、y;unabletomakeelectromagnetismshiedinsomestrongelectromagnetismlocale.ThepaperadoptsanewpatterncommunicationcriterionUSBanddevelopsahigh-speeddataacquisitioncard.Thesystemhassuccessdedinvirtualinstruments’explointation.Thehardwareresultisanairtightdeviceandthesoftwareplathasafriendlygraphicuser
5、interface(GUI)whichmakesthesystemsimpleandpowerfulinpracticalusage.Theratereaches24Mb/swhichreachesadvancedlevelinhome.Atfirstthepaperintroducesthebasictheoryofdataacquisition,thedataacquisitionprocess,twosamplepatterns(realtimesamplingandequivalenttimesampling).Thepaperdiscussesthedataacquisit
6、ionsystemnext.Itincludesthedataacquisitionsystem’sform;structure;channelscheme;interfaceschemeandhardwaredesign.Anditdescribesthemainchipsandtechnologyusedinthesystem.ParticularlyitintroducestheUSBsystemstructure;thetransmissionmodeofUSBandthecharactersofUSB2.0.Thepaperexploitsfirmwareprogram.H
7、eremakesparticulardescriptiontotheframeprogramandfunctionprogram.Onthesoftwareside,itdesignsandpassesthedriverandapplicationprogram.Atthesametime,thepapershowsthetestresultofthedataacquisitionsystemusingLabWIEWassoftwareflat.Hardw
