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基于增强现实ar装配系统研究.pptx

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AcomprehensivesurveyofaugmentedrealityassemblyresearchAbstractprovideaconciseoverviewofthetechnicalfeatures,characteristicsandbroadrangeofapplicationsofARbasedassemblysystemspublishedbetween1990and2015.Introduction1.traditionalcomputer-aidedassemblytechnology：requirtoidentifyconstraintinformationbetweenthematingparts；difficulttoforeseetheimpactofindividualmatingspecificationsonotheraspectsoftheassemblyprocess；lacksdirectinteractionbetweenusersandthecomponents.2.VRassemblysystem：lackingofrealisticexperience，decreasingthefidelityandcredibility；noteasytofullyandaccuratelymodelthereal-timeandactualworkingenvironments.3.ARassemblysystem：doesnotneedtheentirerealworldtobemodeled；enhancestheinteractionbetweenthesystemsandtheusers，manipulatetheobjectsnaturally.SixfunctionalmodulesofARassemblysystemThreemaincategoriesARassemblysystemARmulti-mediaandinteractiveinstructions Disadvantage： focussolelyonprovidingstep-basedinstructions，overlookinguser’sneedoftimelyguidanceinassemblyoperations； couldnotkeeptrackoftheassemblystatusinreal-timeandrecognizeerrorsandcompletionstates； whenassistingcomplexassemblyprocesses，time-consumingauthoringprocedures,integrationwithenterprisedata； theinteractionschememaydisturborinterruptuser’son-goingassemblytask. Target: detectingandrecognizingtheusers’actionsinordertoprovideanindustrialrobusthandsfreeinteraction. examinetheappropriatenessofARguidanceformorecomplex,multi-stepassemblytasks.Context-awarenessandauthoring ARassemblysystemkeepstrackofthestatusofusersinreal-time,automaticallyrecognizingmanualerrorsandcompletionateachassemblystepanddisplayingmultimediainstructionscorrespondingtotherecognizedstates.ARassemblyauthoringsystemshavebeenenabledtocopewithmanualassemblyoperationsefficiently; Disadvantage： time-consumingtobuild‘‘adhoc’’systems. needmanualinput. Target: tobemoretask-adaptive,suiteforawiderangeofdifferenttasks. considertheimplementationissuesofsensors. becomesmartenoughtounderstandauser’sintentandgeneratetimelycontext-awareguidanced