自動光學(xué)檢測技術(shù)在貼裝檢測中的應(yīng)用研究.pdf

1、華中科技大學(xué)碩士學(xué)位論文自動光學(xué)檢測技術(shù)在貼裝檢測中的應(yīng)用研究姓名：文燕申請學(xué)位級別：碩士專業(yè)：計算機系統(tǒng)結(jié)構(gòu)指導(dǎo)教師：魯宏偉20070130華中科技大學(xué)碩士學(xué)位論文華中科技大學(xué)碩士學(xué)位論文IIAbstractAsthedevelopmentofSurfaceMountingTechnologytowardstolightlythinmicrominiaturetraditionalinspectionarithmeticcannots

2、atisfyproductivedemsothatAutomaticOpticalInspection(AOI)hasgottenanextensiveinvestigation.AOImeansthatdigitalimageofinspectingobjectisobtainedbyopticalimagingtechnologythentheimageiscalculatedbycomputerfinspectionanalysi

3、sdeterminationtheobject.Aimingatprincipalinspectionobjectit’sdesignedcollectivitystructureofsystem.InthehardwareofAOIthedesignofilluminationsystemadoptslamphouseannularfiberlaserradialintensityautoregulation.gecoupleddev

4、iceofplanarmatrixischosenfvideocameratheimagecollectioncardisalsochosentocrespondtothecamera.InthisinspectionalgithmfirstlythePCBimageisprocessedfnoisecancelingWhentakingtheimageofPCBthex、ytranspterisnotalwaysprecisesoth

5、attheimagemaybedeflectiverotationalPrewittarithmeticoperatsisusedfdetectingbder.ThencodinatesystemoftheimageislocatedagainbysearchingstrategyinthreedirectionsHoughconversion.Thissubjectpresentsaregiongrowingalgithmbasedo

6、ntheinitialpointioninwindowsadaptivegrowingthresholdtosegmenttheelementareafromPCBpictureautomatically.Theionoftheinitialpointinregiongrowingalgithmisimproved.thegrowingthresholdsaredeterminatedautomaticallybyanapproachw

7、hichgroundsonstatisticaldataoftheareaneartheinitialpointthefeatureofthegrownregion.Thepartialfeatureglobalfeatureareconsideredintheprocessofelementsegmentation.Finallythebderofelementisbyleastsquaresalgithmthenthetaskofs

8、urfacemountinginspectionisfinished.AOIsystemiscompiledbyVisualCinwindowsoperatingsystem.TheresultshowsthatAOIsystemhasbigpracticalvaluebecauseofhighspeedwildinspectingrange.Keywds:technologyofmicroelectronicsurfacemounti