简介：Inthispaper,aphotoelectricdeviceisintroduced,whichisusedinde-tectingthequalityoninternalsurfaceofthinandlongsteelpipe.Inthisdevice,theCCTVlensisusedforextracttheflawinformationoninternalsurfaceofthepipe,andmakeIBM-PC/AT486computerascontrollingandimageprocessingsystem.Bythisinstrument,thefunctions,suchasthedigitalconversiongofinputinformation,imageprocessing,classificationofrecognitionandoutputdisplaycanbeobtained,Inthepetroleumandchemicalindustry,byusingthisapparatus,wecandetectthequalithoninternalsurfaceofvariousmetalpipeswithreal-timeautomatically.

简介：Duringthelastfewdecades,photothermalradiometry(PTR)hasbeengreatlydevelopedandwidelyappliedinthefieldofnondestructivetesting.However,thetraditionalPTRsystememploysanexpensivelock-inamplifiertodetecttheweakphotothermalsignal,whichleadstohighcostandlongtesttime.Inthispaper,afasttransmissionPTRsystembasedonsamplingbyusinganinternalcomputersoundcardwasdevelopedtolowerthesystemcostandshorterthetesttime.Apieceofamorphoussilicon(a:Si)thinfilmsolarcellswithartificialdefectswaspreparedandtestedbythesystem.Theresultsshowthatthesharpeneddefectscanbeidentifiedeasilyandquicklyaccordingtothesignificantpeaksoftheoriginalinfraredsignalsampledbytheinternalcomputersoundcard.Furthermore,moredetaileddefectscanbeinvestigatedbyprocessingtheinfraredsignal.ThesevalidatetheeffectivenessoftheproposedtransmissionPTRsystemasalowcostandefficientnon-destructivetesttechnique.

简介：ThediamondfilmsadherenttoSisubstratearedepositedwiththemicrowaveplasmaCVD(MPCVD)atmicrowavepowersof6000Wand4000Wfrom6hto10h,respectively,theinternalstressesofthefilmsaremeasuredbyXRD.Spectralpeakshiftandwideningareappliedtocalculatethemagnitudesofmacroandmicrostresses.Theresultsshowthatthemacrostressistensile.Theinternalstresscanbecontrolledbythemicrowavepower.Withthemicrowavepowerincreasing,theintrinsicandmacrostressesdecrease,andthemicrostressincreasessignificantly.Also,itcanbefoundthatthemacroandmicrostressesincreasewithdepositedtimewhentheotherconditionsarethesame.

简介：AnadaptiveinternalmodecontrolisproposedtoeliminateeffectivelyperiodicdisturbancewithuncertainfrequencycausedbyinputerrorangleofPIGA(PendulousIntegratingGyroAccelerometer).Anadaptivealgorithmwithperiodicdisturbancefrequencyidentificationonlineisappliedandtheinternalmodelcontrollerparametersareadjustedtoeliminatedisturbance.Thentheconvergenceofthisalgorithmandthestabilityofthesystemareprovedbytheaveragingmethod.SimulationresultsverifytheproposedschemecaneliminateperiodicdisturbanceandimprovethetestprecisionforPIGAeffectively.

简介：生物织物的吸收系数是在biomedicine的一个重要参数，但是它的决心仍然是挑战。在这份报纸，我们用集中photoacoustic成像技术和圆柱的扩散纤维(CDF)的内部轻照耀确定建议一个方法目标光吸收系数。为墨水吸收器的吸收系数第一在一样的刺激通过photoacoustic和spectrophotometric大小被决定，它表明这个方法的可行性。另外，有几集中的墨水吸收器的光吸收系数被测量。最后，二维的扫描photoacoustic图象被获得。光吸收系数测量和吸收器的同时的photoacoustic成像non-invasively是方法的典型特征。这个方法能为血氧浸透，基于吸收的成像和治疗的非侵略的决心起一个重要作用。