切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1643阅读
    • 0回复

    [技术]十字元件热成像分析 [复制链接]

    上一主题 下一主题
    离线infotek
     
    发帖
    6441
    光币
    26350
    光券
    0
    只看楼主 倒序阅读 楼主  发表于: 2022-01-24
    简介:本文是以十字元件为背景光源,经过一个透镜元件成像探测器上,并显示其热成像图。 vq{:=:5'P  
    gC 4w&yL  
    成像示意图
    _]\mh,}  
    首先我们建立十字元件命名为Target ()7=(<x{  
    aU3&=aN+  
    创建方法: [L8gG.wy  
    sJ,zB[e8  
    面1 : T:si?7CR  
    面型:plane eaI&DP  
    材料:Air Cc^t&Eg  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box R\<^A~(Gl  
    Z5+0?X0i  
    = *sP, 6  
    辅助数据: pY2nv/  
    首先在第一行输入temperature :300K, s:jwwE2  
    emissivity:0.1; htjJ0>&  
    W?$ ImW  
    p\(%bO   
    面2 : A%9"7]:   
    面型:plane )P$ IXA\  
    材料:Air DI*xf Kt  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box wj/r)rv E  
    OvFZ&S[  
    Hi ?],5,/  
    位置坐标:绕Z轴旋转90度, 03MB,  
    $rdA0%;  
    0c]Lm?&  
    辅助数据: fD!O aK  
    4Ld0AApncy  
    首先在第一行输入temperature :300K,emissivity: 0.1; F Hv|6zUX  
    Tj>~#~  
    pdE=9l'  
    Target 元件距离坐标原点-161mm; ?-(E$ll  
    >iq^Ts  
    W nVX)o  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 4b4nFRnH  
    ZJ!/49c*>  
    GE"#.J4z  
    探测器参数设定: Q i?   
    8(BLS{-"<  
    在菜单栏中选择Create/Element Primitive /plane 1{DHlyA6g  
    vHao y  
    N^)L@6  
    Nf3L  
    9m<>G3Jr  
    M'*  Y  
    元件半径为20mm*20,mm,距离坐标原点200mm。 J L]6o8x  
    &359tG0@P  
    光源创建: T9u/|OP  
    #MI}KmH  
    光源类型选择为任意平面,光源半角设定为15度。 #w#B'  
    Yh4e\]ql~N  
    p#3P`I>ZrT  
    我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 %[RLc[pB  
    Z,ag5 w`]L  
    我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线 wWwY .}j  
    hMi[MB7~  
    W[+E5I  
    功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 -[ F<u  
    0E bs-kP  
    创建分析面: $NqT ={!  
    !k&<  
    M,6m*  
    到这里元件参数设定完成,现在我们设定元件的光学属性,在前面我们分别对第一和第二面设定的温度和发射系数,散射属性我们设定为黑朗伯,4%的散射。并分别赋予到面一和面二。 3pm;?6i6  
    BjJ+~R  
    ca-|G'q  
    到此,所有的光学结构和属性设定完成,通过光线追迹我们可以查看光线是否可以穿过元件。 !30BZM^  
    xez~Yw2  
    FRED在探测器上穿过多个像素点迭代来创建热图 {V8 v  
    kIM* K%L}  
    FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 =eYrz@,  
    将如下的代码放置在树形文件夹 Embedded Scripts, GYCc)Guc  
    Z5\u9E"]  
    '%kk&&3'  
    打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 /)6<`S(  
    @TsOc0?-  
    绿色字体为说明文字, y~;Kf0~  
    HJM-;C](  
    '#Language "WWB-COM" O']-<E`1k  
    'script for calculating thermal image map ><5tnBP|+L  
    'edited rnp 4 november 2005 jFnq{L t  
    K6_{AuL}4  
    'declarations ~- JkuRJ\  
    Dim op As T_OPERATION `AQv\@wp  
    Dim trm As T_TRIMVOLUME t<x0?vfD  
    Dim irrad(32,32) As Double 'make consistent with sampling *cJ GrLC  
    Dim temp As Double  >Xh 9{/o  
    Dim emiss As Double 3-srt^>w*  
    Dim fname As String, fullfilepath As String ;L++H5Kz6  
    ^#p S u  
    'Option Explicit L<*wzl2Go  
     !3}vl Y1  
    Sub Main jbGP`b1_  
        'USER INPUTS o|(-0mWBQA  
        nx = 31 &.;tdT7  
        ny = 31 /N]?>[<NW  
        numRays = 1000 }`M[%]MNc  
        minWave = 7    'microns I[G<aI!  
        maxWave = 11   'microns o%5^dX&[  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 jv?`9{-  
        fname = "teapotimage.dat" 0k0 y'1SL  
    R"VmN2  
        Print "" u.gnv dU  
        Print "THERMAL IMAGE CALCULATION" -BgzAxa  
    ) j_g*<  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 bwS1YGb  
    (s z=IB ;  
        Print "found detector array at node " & detnode a>G|t5w  
    N)WAzH  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 FhHcS>]:.  
    `c ^2  
        Print "found differential detector area at node " & srcnode wZ5 + H%x  
    m = "N4!  
        GetTrimVolume detnode, trm b7p&EK"Hm  
        detx = trm.xSemiApe gyondcF  
        dety = trm.ySemiApe -tlRe12  
        area = 4 * detx * dety EQET:a:g  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety :"#EQq]ct  
        Print "sampling is " & nx & " by " & ny lrPiaSO`I  
    5\A[ra  
        'reset differential detector area dimensions to be consistent with sampling '!I^Lfz-Z  
        pixelx = 2 * detx / nx 5VDqx@(  
        pixely = 2 * dety / ny pZ}4'GnZI  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False rfpeX   
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 4#{i  
    ML^c-xY(  
        'reset the source power 7aj|-gZ  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) 9# IKb:9k  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" Y.$ '<1  
    s `B"qw  
        'zero out irradiance array }Zu>?U  
        For i = 0 To ny - 1 y2bL!Y<s9  
            For j = 0 To nx - 1 ^F"Q~?D)  
                irrad(i,j) = 0.0 yZE"t[q#O  
            Next j llXyM */  
        Next i Y9F!HM-`  
    }SR}ET&z  
        'main loop C: @T5m  
        EnableTextPrinting( False ) . T6fPEb  
    @kw#\%Uz  
        ypos =  dety + pixely / 2 ],YIEOx6  
        For i = 0 To ny - 1 /f@VRME  
            xpos = -detx - pixelx / 2 "T|%F D&[  
            ypos = ypos - pixely n a,j  
    ]([:"j  
            EnableTextPrinting( True ) Hr |De8#f  
            Print i gJ6 C&8tl  
            EnableTextPrinting( False ) j'Z}; 3y  
     c %w h  
    (vMC.y5  
            For j = 0 To nx - 1 @-|{qP=Dy  
    {p&L wTnf  
                xpos = xpos + pixelx xL,Lb}){%  
    &^KmfT5C  
                'shift source x2(!r3a  
                LockOperationUpdates srcnode, True !*_5 B'  
                GetOperation srcnode, 1, op !r]elX  
                op.val1 = xpos K<'L7>s3lA  
                op.val2 = ypos $R4[TQY).!  
                SetOperation srcnode, 1, op `!rH0]vy  
                LockOperationUpdates srcnode, False _R-[*ucq  
    u;rK.3o  
    raytrace ]y= ff6Q  
                DeleteRays PYX]ld.E  
                CreateSource srcnode !g{9]"Z1T  
                TraceExisting 'draw `KBgVhS>  
    bI/d(Q%#<  
                'radiometry ~?TG SD@(  
                For k = 0 To GetEntityCount()-1 H. UwM  
                    If IsSurface( k ) Then oace!si  
                        temp = AuxDataGetData( k, "temperature" ) T|dQY~n~  
                        emiss = AuxDataGetData( k, "emissivity" ) !mLQdkTE  
                        If ( temp <> 0 And emiss <> 0 ) Then F[uy'~;@  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) 9N5ptdP.d  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) $Ay j4|_-  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi jkw:h0hX  
                        End If C,T9xm  
    {a -bew  
                    End If &(a#I]`9M  
    Rd7[e^HSN  
                Next k h >V8YJ  
    c#X9d8>  
            Next j \-3\lZ3qj  
    cz<8Kb/XV  
        Next i LnZzY0  
        EnableTextPrinting( True ) PF5;2  
    gn"Y?IZ?  
        'write out file RSEo'2  
        fullfilepath = CurDir() & "\" & fname A;VjMfoB  
        Open fullfilepath For Output As #1 FRa@T N/Ic  
        Print #1, "GRID " & nx & " " & ny 2K?~)q&t*  
        Print #1, "1e+308" mv9k_7<  
        Print #1, pixelx & " " & pixely wT/TQEgz  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 z<2!|  
    8l,`~jvU!*  
        maxRow = nx - 1 (`h$+p^-y  
        maxCol = ny - 1 ~xI1@^ r  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) H{Tt>k  
                row = "" Z^?1MJ:`  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) v"'Co6fw  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string :.5l9Ci4  
            Next colNum                     ' end loop over columns 9+<%74|,  
    242dT/j  
                Print #1, row Ckd=tvL  
    c"qaULY  
        Next rowNum                         ' end loop over rows Exir?G}\  
        Close #1 90JD`Nz  
    0uX"KL]Elf  
        Print "File written: " & fullfilepath .KiJq:$H  
        Print "All done!!" Q(@/,%EF  
    End Sub z"/Mva3|  
    %JmRJpCvR  
    在输出报告中,我们会看到脚本对光源的孔径和功率做了修改,并最终经过31次迭代,将所有的热成像数据以dat的格式放置于: +-_71rJc.  
    m# #( uSh  
    fBCW/<Z  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 cI}qMc  
      
    `m2e *  
    .XPcH(q  
    打开后,选择二维平面图: m\a_0!K  
    1,cd[^`.  
     
    分享到