快速高精度的貼片產品圖像檢測系統(tǒng)研究.pdf

1、廣東工業(yè)大學碩士學位論文快速高精度的貼片產品圖像檢測系統(tǒng)研究姓名：王建暉申請學位級別：碩士專業(yè)：控制理論與控制工程指導教師：章云20090501廣東工業(yè)大學碩士學位論文ABSTRACTAssurfacemountedtechnology(SMT)wasadoptedinprintedcircuitboardassembly，electronicproductsbecamemoreintegrated，smallercomponentsa

2、ndhigherassemblydensity，andmadeassemblyautomationButconventionalinspectionbaffledtheassemblyautomationinspeedandreliabilityAutomatedopticalinspection(AOI)forSMTassemblythatbasedonmachinevisionwasuptodateadvancedtechnolog

3、yMachinevisionsystemusuallyobtainsdigitalimagesignalsofdetectedobjectbyCCDorCMOScamerathenprocessesthedigitalimagesignalstogetcharacteristicvaluesbyadoptingadvancedcomputerhardwareandsoftwaretechniquesBasedontheresults，t

4、hesystemdisplayedtheimages，exportedthedataandsentoutinstructionstocontrolcorrespondingequipmenttoactsuchaslocationadjustingandqualityfilteringaccordingtofeedbackinformationAfterreviewingtheresearchhistoryandsurveyingther

5、elatedresearchstateonmachinevisionithasexplainedthepositivemeaningofthestudyThisdissertationhasresearchedhardwarestructureofmachinevisionsystem；capturingandprocessingofdigitalimage；patternrecognition；matchingalgorithm；an

6、dimagemosaicetcMachinevisiontechnologyisappliedintoSMTdefectdetectioninthispaperItrealizesautomateddefectdetectionFortheactualproductionengineering’Sdemand，，wedesignthewholeschemeofhighprecisionSMTProductImageDetectionSy

7、stemdiscusstheprincipleofthesystemandestablishsoftwareandhardwareplatformforthesystemincludingilluminatingunitimageacquisitionunitandcontrolunitInthepartoftheimageprocess，theauthorsummarizedcertainprojecttraitsinimagemos

8、aicofSMT，anddesignedthefastandaccurateimagemosaicmethodwithnon—uniformilluminationandnoiseIthascombinedthecodingmethodandthesearchingmethodofcoarse—fmetwostepsTheimageinformationcouldbefullyusedbyitThemethodhadreducedcal