資源描述：
《多通道數(shù)據(jù)采集系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)》由會(huì)員上傳分享，免費(fèi)在線(xiàn)閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、摘要摘要科學(xué)技術(shù)的發(fā)展離不開(kāi)測(cè)試手段的變革。隨著現(xiàn)代科學(xué)技術(shù)的發(fā)展，各領(lǐng)域?qū)y(cè)試儀器的要求越來(lái)越高。多通道數(shù)字存儲(chǔ)示波器在測(cè)量領(lǐng)域中占有越來(lái)越重要的地位。而高采樣率多通道的數(shù)字存儲(chǔ)示波器技術(shù)被少數(shù)國(guó)外的知名廠(chǎng)商所壟斷，因此自主設(shè)計(jì)高采樣率多通道數(shù)字存儲(chǔ)示波器就顯的十分的必要。本多通道數(shù)字存儲(chǔ)示波器采用FPGA+DSP的架構(gòu)，以高速A/D前端采樣來(lái)實(shí)現(xiàn)整體設(shè)計(jì)。文中先介紹了數(shù)字存儲(chǔ)示波器的特點(diǎn)以及發(fā)展?fàn)顩r，隨后詳細(xì)討論了四通道數(shù)據(jù)采集系統(tǒng)設(shè)計(jì)中的主要問(wèn)題，具體內(nèi)容包括：1.針對(duì)四通道數(shù)字存儲(chǔ)示波器的要求，進(jìn)行主要器件的選型以及器件的主要特點(diǎn)介紹。2.數(shù)據(jù)采集和觸發(fā)功能的設(shè)計(jì)。重點(diǎn)詳細(xì)介
2、紹了A/D采樣電路的實(shí)現(xiàn)，主要包括采樣時(shí)鐘設(shè)計(jì)和控制電路設(shè)計(jì)。隨后介紹了高速數(shù)據(jù)的分相存儲(chǔ)問(wèn)題，以及波形均勻顯示的設(shè)計(jì)。最后介紹了觸發(fā)電路的設(shè)計(jì)，重點(diǎn)討論了觸發(fā)釋抑、脈寬觸發(fā)、斜率觸發(fā)和視頻觸發(fā)電路的設(shè)計(jì)。3.針對(duì)信號(hào)完整性的問(wèn)題，提出了幾項(xiàng)布線(xiàn)和設(shè)計(jì)中注意的問(wèn)題。隨后介紹了FPGA中同步設(shè)計(jì)的重要性以及介紹了同步設(shè)計(jì)的原則。同時(shí)針對(duì)LVDS在PCB布線(xiàn)中出現(xiàn)的過(guò)孔問(wèn)題，提出了一種利用FPGA內(nèi)部反相器的解決方案。關(guān)鍵字：數(shù)字存儲(chǔ)示波器、數(shù)據(jù)采集、信號(hào)完整性、同步設(shè)計(jì)IAbstractAbstractThedevelopmentofscienceandtechnologycannot
3、departfromtheimprovementoftestmeans.Alongwiththedevelopmentofmodernscienceandtechnology,therequirementtotestinstrumentsishigherandhigher.Multi-channelDigitalStorageOscilloscopeplayamoreandmoreimportantroleinthefieldofmeasurement.ButhighsamplingrateMulti-channelDigitalStorageOscilloscopetechnolo
4、gyismonopolizedbyfewfamousforeignfirms,soindependentlydesignofhighsamplingrateMulti-channelDigitalStorageOscilloscopeisverynecessary.TheMulti-channelDigitalStorageOscilloscopeemploysFPGA+DSPframework,withthehigh-speedA/Dfront-endsamplingtoachieveoveralldesign.Thispaperfirstintroducesthecharacte
5、risticsofDigitalStorageOscilloscopeanddevelopmentstatus,thendiscussedthemainproblemsinFour-channelDataacquisitionsystem,thespecificcontentsinclude:1.AccordingtotherequirementsofFour-channelDigitalStorageOscilloscopediscusestheselectionofthemaincomponentsandintroducetheircharacteristics.2.Dataac
6、quisitionandtriggercircuitdesign.EmphasizesonA/Dsamplingcircuit?srealizing,mainlyincludingthesamplingclockdesignandcontrolcircuitdesign.Thenintroducesthehigh-speeddatastoragewithdifferentphases,anddesignhowtouniformitydisplayingthewaveform.Finallyintroducesthetriggercircuitdesign,emphaticallydi
7、scussestriggerholdoff,pulsewidthtrigger,slopetriggerandvideotriggercircuitdesign.3.ForSignalintegrity,putforwardseveralproblemsinwiringanddesign.ThenintroducestheimportanceoftheFPGAsynchronizationdesignandbingupthesynchronizationd
