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    求助汽车灯方面的光度试验

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  • 试验的标准如下所示,求大侠指点下操作方法和原理.谢谢

    4.5PhotometryTest
    Thistestmeasurestheluminousintensitiesattestpointsthroughoutthelightdistributionpatternas
    specifiedbytheapplicableSAEPublicationforthesampledevice.
    4.5.1PHOTOMETRICTESTEQUIPMENT
    4.5.1.1Thepositioner(goniometer)configurationshallbecapableofpositioningthesampledeviceat
    thetestpointpositionspecifiedintheapplicableSAEPublication.Therecommended
    goniometerconfigurationisspecifiedasTypeAasshowninFigureB1ofSAEJ1330.Other
    systemsmaybeusedtoachieveequivalentpositioning,butitwillbenecessaryatcompound
    anglesgreaterthan5degreesfrom“H-V”tocalculatethepositionwhichisequivalenttothatof
    therecommendedgoniometer.
    4.5.1.2Thephotometersystemshallconsistofasensor,amplifier,andindicatorinstrument.The
    systemshallbecapableofprovidingtheluminousintensityreading(candela)oftheoutputof
    thedevicebeingtested.
    4.5.1.3Thesensor,unlessotherwisespecified,shallhaveamaximumeffectiveareathatwillfitwithin
    acirclewhosediameterisequalto0.009timestheactualtestdistancefromthelightsourceof
    thedevicetothesensor.Thesensoreffectiveareaistheactualareaofinterceptedlight
    strikingthedetectorsurfaceofthephotometer.Forsystemswithlens(es)thatchangethe
    diameteroftheintercepterlightbeambeforeitreachestheactualdetectorsurface,the
    maximumsizerequirementsshallapplytothetotalareaoflightactuallyinterceptedbythelens
    surface.Thesensorshallbecapableofinterceptingalldirectilluminationfromthelargest
    illuminateddimensionofthesampledeviceatthetestdistance.
    4.5.1.4Thecolorresponseofthephotometersensorshallbecorrectedtothatofthe1931CIE
    Standardobserver(2degree)PhotopicResponseCurve(ASTME308).
    4.5.2PHOTOMETRICTESTPROCEDURE
    4.5.2.1TheDUTshallbemountedandtestedinthedesignposition(s)orasmountedonthevehiclein
    accordancewiththemanufacturer’sinstruction.
    4.5.2.2Unlessotherwisespecified,accurate,ratedbulbsshallbeused.Theyshallbeselectedfor
    accuracyasspecifiedinSAEJ387andshallbeoperatedattheirdesignmeanspherical
    candlepower.
    4.5.2.3Wherespecialbulbsareused,theyshallbeagedinaccordancewithSAEJ387andoperated
    attheirdesignmeansphericalcandlepower.
    4.5.2.4Ifthedesignvalueofthemeansphericalcandlepowerisnotavailableorthelightsourceisan
    integralpartofthedevice,operatethelightsource(bulbfilament)atitsspecifieddesign
    voltage.
    4.5.2.5Ifthedesignmeansphericalcandlepowerofthebulbisintentionallymodifiedfrom
    specificationsforadevicethroughinternalorexternalcircuitry,operatethebulbwiththe
    voltage-modificationcircuitryattachedandwiththespecifieddesignvoltageappliedtotheinput
    ofthemodificationcircuitry.
    4.5.2.6Thetestdistanceformeasuringtheluminousintensityshallbemadeatequalto,orgreater
    than,theminimumtestdistancebetweenthecenterofthelightsource(orthefaceofareflex
    reflector)andthephotometersensorasspecifiedintheSAEPublicationapplicabletothe
    functionofthesampledevice.
    4.5.2.7ThelocationsoftestpointsarespecifiedintheapplicableSAEPublication.Thefollowing
    nomenclatureshallapply:
    4.5.2.7.1Theletters“V”and“H”designatetheverticalandhorizontalplanesintersectingboththe
    centerofthedevicelightsource(orcenterofareflexreflector)andthegoniometeraxis.
    4.5.2.7.2Adeviceusingabulbthathasamajorandaminorlightsourceshallbeorientedwithrespect
    toitsmajorlightsource.
    4.5.2.7.3“H-V”designatesthezerotestpointangleattheintersectionofthe“H”and“V”planes.
    Unlessotherwisespecified,thisintersectionshallbeparalleltothelongitudinalaxisofthe
    vehicleinthecaseoffrontandrearfunctiondevicesandshallbehorizontaland
    perpendiculartothelongitudinalaxisofthevehicleinthecaseofsidefunctiondevices.The
    letters“U,”“D,”“L,”and“R”(up,down,left,andright,respectively)designatestheangular
    positionindegreefromtheH-Vplanestothegoniometerasviewedfromalamportothe
    sourceofilluminationasviewedfromareflexreflector.
    4.5.2.7.4Thehorizontalangleofthetestpoint(“L”leftand“R”right)istheanglebetweenthevertical
    planeandtheprojectionofthelightrayfromthedeviceontothehorizontalplane.
    4.5.2.7.5Theverticalangleofthetestpoint(“U”upand“D”down)isthetrueanglebetweenthe
    horizontalplaneandthelightrayfromthedevice.
    4.5.2.7.6Thedirectionofanangulartestpointcanbevisualizedwhenanobserverstandsbehindthe
    deviceandlooksinthedirectionoftheemanatinglightbeamtowardsthephotometersensor
    whenthedeviceisproperlyaimedwithrespecttoH-V.
    4.5.2.7.7Photometricmeasurementsshallbemadewiththelightsource(s)steadyburning.The
    luminousintensitymeasurements,incandela,shallberecordedforeachofthetestpoints
    andzonesspecifiedforthatfunctionofthedevicebeingtested.

    只看了前面几段,ms用光度分布仪就可以测量
    回复
    问题是我们缺乏这些相关仪器,郁闷
    回复
    Lv.3
    可以去供应商或者第三方进行检测。
    回复

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