简介：Ｓｔｕｄｙｏｎｃｏｎｔａｃｔｌｅｓｓｕｌｔｒａｓｏｎｉｃｓｅｎｓｏｒａｎｄｓｅａｍｔｒａｃｋｉｎｇ￥ＨｏｕＷｅｎｋａｏ；ＨｕＳｈｅｎｇｓｕｎａｎｄＺｈａｏＪｉａｒｕｉＴｉａｎｊｉｎＵｎｉｖｅｒｓｉｔｙＺｈａｎｇＳｈａｏｂｉｎ（ＱｉｎｇＨｕａＵｎｉｖｅ...

简介：VisualimagesensorisdevelopedtodetecttheweldpoolimagesinpulsedMIGwelding.Anexposurecontroller,whichiscomposedofthemodulesofthevoltagetransforming,theexposureparameterspresetting,thecomplexprogrammablelogicdevice(CPLD)basedlogiccontrolling,exposuresignalprocessing,thearcstatedetecting,themechanicalirisdrivingandsoon,isdesignedatfirst.Then,avisualimagesensorconsistsofanordinaryCCDcamera,opticalsystemandexposurecontrollerisestablished.Theexposuresynchroniccontrollogicisdescribedwithvery-high-speedintegratedcircuithardwaredescriptionlanguage(VHDL)andprogrammedwithCPLD,todetectweldpoolimagesatthestageofbasecurrentinpulsedMIGwelding.Finally,bothbeadonplateweldingandVgroovefilledweldingarecarriedout,clearandconsistentweldpoolimagesareacquired.

简介：ThisinvestigationwasperformedtostudyacousticfieldsignalinordertoimproveRSWquality.Researchersfirstlybuiltanacousticarraysensorsystem,whichincluded8MPA-416acousticsensors,dataacquisitioncardandLabVIEW.Thesystemobtainedtheacousticfieldinformationintheprocessofnuggetgrowing.Duetothenonlinearityfieldsignal,arraysensoralgorithmwasutilizedtoquantitativelyanalyzethecharacteristicsofacousticfieldandreducednoise.TheexperimentandcalculationresultsshowthatarraysensorsystemcanacquireacousticfieldsignalofnuggetgrowingintheRSWprocessandarrayprocessingalgorithmbasedonacousticfieldcanextractcharacteristicparameterstoevaluateRSWquality.ItwasconcludedthattheacousticarraysensorsystemoffersanewmethodologyforRSWqualityinspection.

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