手持式超聲波探傷硬件系統(tǒng)的研制.pdf

1、南京航空航天大學碩士學位論文手持式超聲波探傷硬件系統(tǒng)的研制姓名：黃元謙申請學位級別：碩士專業(yè)：通信與信息系統(tǒng)指導教師：徐大專20091201手持式超聲波探傷硬件系統(tǒng)的研制AbstractWiththeincreasingmaturityofultrasonicdetectiontheoryandtherapiddevelopmentofmodemlargescaleintegratedcircuitandcomputertechnolo

2、gyultrasonictestingtechnologywithitscelerityaccuracyhighefficiencypollutionfree，lowcostetc，iswidelyusedinmachinerymanufacturing，petrochemical，aviationaerospaceandotherindustrialsectors，弱allimportantmeanstoensureprojectqu

3、alityandthesafetyofequipmentInrecentyears，ultrasonicflawdetectionsystemisdevelopingtowardstOhi【ghspeed，digital，automation，andintelligence，portable，lowpowerproductsarebecomingabigdemandfortestingoperationsThisthesisaimsto

4、developahandheldultrasonictestingsystembasedonembeddedplatform，andtherefore，themainfocusofourdesignisminiaturization，lowpowerconsumptionandhilghperformanceNowmaintasksaresummarizedasfollows：Firstlyproposeandimplementthed

5、esignofahandheldultrasonicdetectionhardwareplatformbasedonARM&FPGAARMprocessor’becauseofitslowpowerconsumptionandhi【ghperformance，actsastheCOreofcomputingandcontrolofthewholeplatformthroughtherelocationofLinuxoperatingsy

6、stemFPGAisresponsibleforechosignalpreprocessingandsystems’synchronizationtimingcontr01SecondlythroughVerilogprogramming，successfullycompletethesimulationandverificationofthesystem’Skeytechnologysuchasdigitaldemodulation，

7、nonuniformmaximumextractionandhardwaregatealarmandwellsolvetheproblemoflowrefreshingrate，slowscanningandpoorreliabilityoftraditionalinstruments，andfacilitatethefollowinghighspeeddatastreamprocessingThirdlyproposeandimple

8、mentthegaincontrolsignalprocessingcircuitbasedonthechipAD8331，andsatisfythedesignrequirementoflownoise，麗debandwidth，highgainand∞onThroughthebandpassfilterdesign，outofbandnoiseissuppressedeffectivelyandthesystemsignaltono

9、iseratioisimprovedconspicuouslyFouthlytoachievethelowpowerconsumptiondesign，weadoptthenewpowersupplyprogramwitllboostingDCDCconverterandLDOregulatornotonlytomeethigherconversionefficiencybutalsoimprovethestabilityofpower

10、supply；makefulluseofARMsystem’Spowermanagementfeaturestoachievetheoverallsystempowercontrollability；takethestaticanddynamiccurrentconsumptionofFPGAintoconsideration，inordertoachieve10Wpowerconsumptiondesign；choosetheLCDo

11、fsmallsizeandlowpowerandachievebrightnessadjustmentthroughPWMbacklight，andSOonFinallytoachievetheminiaturizationdesign，useSMDpackageandhighlyintegratedprocessingchipasmuchaspossibletoeffectivelyreducethelayoutarea；atthes

12、ametime，externalinterfaceshouldapplyminiaturizationdesign，anddebuginginterfacesuseportablepluginginconnectorinsteadNowthefirsteditionofthehardwareplatformhasbeendesignedsuccessfullyandpassedrelatedfunctionandperformancet