切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1496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
    6421
    光币
    26250
    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。 ~}Pfu  
    |uJ%5y#  
    成像示意图
    _yT Ed"$  
    首先我们建立十字元件命名为Target Iu6   
    y1#1Ne_  
    创建方法: 2`-Bs  
    19] E 5'AI  
    面1 :  Fk;Rfqq  
    面型:plane Uw:"n]G]D?  
    材料:Air .RL=xb|[  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box G+m }MOQP7  
    hqdDm  
    nr3==21Om4  
    辅助数据: ~>XxGjxe  
    首先在第一行输入temperature :300K, [N'h%1]\  
    emissivity:0.1; lLIA w$  
    C_Wc5{  
    uw8f ~:LT  
    面2 : p K$`$H  
    面型:plane v` r:=K  
    材料:Air 5IG-~jzCLb  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box 5-A\9UC*@  
    'hf8ZEW9'  
    "wc<B4"  
    位置坐标:绕Z轴旋转90度, `0R./|bv\I  
    4Po_-4  
    8cQ'dL`(  
    辅助数据: d d;T-wa}  
    *z2s$EZ  
    首先在第一行输入temperature :300K,emissivity: 0.1; LH6 vLuf  
    P93@;{c(  
    z?//rXuO  
    Target 元件距离坐标原点-161mm; #A.@i+Zv  
    ?h2}#wg  
    13 wE"-  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 FgO)DQm  
    V43H /hl  
    hv+zGID7  
    探测器参数设定: -F>jIgeC2v  
    !!y a  
    在菜单栏中选择Create/Element Primitive /plane ~)'k 9?0  
    Xm&L B X  
    h `wD  
    tnIX:6  
    "7`<~>9t.  
    QSj]ZA  
    元件半径为20mm*20,mm,距离坐标原点200mm。 2"~8Z(0  
    {XHh8_ ^&  
    光源创建: ?%kV?eu'  
    \Og+c%  
    光源类型选择为任意平面,光源半角设定为15度。 y> (w\K9W  
    C*lJrFpB  
    YbLW/E\T  
    我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 Dhv3jg;lq  
    We z 5N  
    我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线 H']+L~j  
    |&jXp%4T  
    Aa]"   
    功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 SY8C4vb'h  
    'm9` 12 H  
    创建分析面: L8n|m!MOD  
    8$|=P!7EO  
    aN=B]{!  
    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。 FgI3   
    3N:D6w-R  
    :i7;w%B  
    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。 cGD(.=  
    E!AE4B1bd  
    FRED在探测器上穿过多个像素点迭代来创建热图 u2[w#   
    U%<Inb}ad  
    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。 |)G<,FJQE_  
    将如下的代码放置在树形文件夹 Embedded Scripts, _tXlF;  
    w*MpX U<  
    $mB;K]m  
    打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 s9d_GhT%-  
    } d }lR  
    绿色字体为说明文字, hpJ-r  
    :j`s r  
    '#Language "WWB-COM" D,ln)["xm  
    'script for calculating thermal image map  Mc}^LDX  
    'edited rnp 4 november 2005 Tb-F]lg$  
    ,?XCyHSgWW  
    'declarations MJrR[h]  
    Dim op As T_OPERATION ;S*}WqP,  
    Dim trm As T_TRIMVOLUME <^uBoKB/f  
    Dim irrad(32,32) As Double 'make consistent with sampling k$7Jj-+~  
    Dim temp As Double  f V(J|  
    Dim emiss As Double IqGdfL6[(  
    Dim fname As String, fullfilepath As String r"R#@V\'1b  
    d`6 ' Z  
    'Option Explicit a@*\o+Su  
    .GcKa024  
    Sub Main k;L6R!V  
        'USER INPUTS E+JqWR5  
        nx = 31 I!?}jo3  
        ny = 31 <"|,"hA  
        numRays = 1000 IaXeRq?<  
        minWave = 7    'microns N.{D$"  
        maxWave = 11   'microns &8 x-o,  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 6K<K  
        fname = "teapotimage.dat" O0y_Lm\  
    }>X~  
        Print "" ?I@W:#>o  
        Print "THERMAL IMAGE CALCULATION" r0gJpttDl  
    ?3xzd P  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 RdML3E  
    }Z,x~G  
        Print "found detector array at node " & detnode !GGkdg*-*9  
    &JI8]JmU)  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 .VzT:4-<Q"  
    fwf$Co+R:*  
        Print "found differential detector area at node " & srcnode # 4PVVu<  
    IobD3:D8W  
        GetTrimVolume detnode, trm Y.r+wc]  
        detx = trm.xSemiApe uU25iDn  
        dety = trm.ySemiApe e@OX_t_  
        area = 4 * detx * dety bbyg8;/  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety ox (%5c)b|  
        Print "sampling is " & nx & " by " & ny %1$,Vs<RH  
    #ucBo<[  
        'reset differential detector area dimensions to be consistent with sampling >J>[& zS  
        pixelx = 2 * detx / nx w)Qp?k d  
        pixely = 2 * dety / ny 7x4PaX(  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False Np0u,t%vs  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 KMjhZap%  
    Tyf`j,=  
        'reset the source power  'CkIz"Wd  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) OH(waKq2I  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" %Qdn  
    K&KWN]  
        'zero out irradiance array Da&]y  
        For i = 0 To ny - 1 }d}Ke_Q0  
            For j = 0 To nx - 1 5S--'=fu+  
                irrad(i,j) = 0.0 7Da`   
            Next j RuVGG)  
        Next i _8_R 1s  
    b 7?hI  
        'main loop Y\?"WGL)p  
        EnableTextPrinting( False ) C={Y;C1  
    P! #[mio  
        ypos =  dety + pixely / 2 cP_.&!T  
        For i = 0 To ny - 1 JB[~;nLlC  
            xpos = -detx - pixelx / 2 Vt&2z)Zz  
            ypos = ypos - pixely 8&`LYdzt  
    dvJ M6W>^=  
            EnableTextPrinting( True ) #Kex vP&*  
            Print i U/l&tmIVY  
            EnableTextPrinting( False ) Q:k}Jl  
    X))/ m[_[  
    +Kbjzh3<wG  
            For j = 0 To nx - 1 !58@pLJw  
    PKg@[<g43  
                xpos = xpos + pixelx |_aa&v~  
    &H/'rd0M  
                'shift source '=8d?aeF  
                LockOperationUpdates srcnode, True V7fq4O^:  
                GetOperation srcnode, 1, op IE/^\ M  
                op.val1 = xpos A1>OY^p3%  
                op.val2 = ypos ]{mPh\  
                SetOperation srcnode, 1, op G.a bql  
                LockOperationUpdates srcnode, False j0evq+  
    Jgd'1'FOs  
    raytrace MPg)=LI  
                DeleteRays Y;^l%ePuW  
                CreateSource srcnode T{ XS")Vw  
                TraceExisting 'draw k],Q9  
    X296tA>C`  
                'radiometry W^LY'ypT  
                For k = 0 To GetEntityCount()-1 Tc`=f'pP)4  
                    If IsSurface( k ) Then EF}\brD1  
                        temp = AuxDataGetData( k, "temperature" ) cZU=o\  
                        emiss = AuxDataGetData( k, "emissivity" ) '3D XPR^B6  
                        If ( temp <> 0 And emiss <> 0 ) Then 9FYUo  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) V>-e y9Q\  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) 4`]^@"{  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi , I (d6  
                        End If dkBIx$t  
    Tg)| or/ %  
                    End If ][h%UrV  
    ^-Kf']hU  
                Next k })8N5C+KU  
    rt~d6|6  
            Next j Pz|>"'  
    s6v ;  
        Next i cyv`B3}  
        EnableTextPrinting( True ) {Y=WW7:Qx  
    =llvuUd\n  
        'write out file 9gEwh<  
        fullfilepath = CurDir() & "\" & fname a /l)qB#  
        Open fullfilepath For Output As #1 =eXU@B  
        Print #1, "GRID " & nx & " " & ny (\hx` Yh=>  
        Print #1, "1e+308" 37 ,  
        Print #1, pixelx & " " & pixely =9["+;\e&  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 (%e .:W${  
    _j/<{vSy  
        maxRow = nx - 1 JG!mc7  
        maxCol = ny - 1 *,8^@(th  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) mD0f<gJ1  
                row = "" YYl4"l  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) [OV"}<V  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string ](9Xvy  
            Next colNum                     ' end loop over columns RJ ||}5  
    NI}yVV  
                Print #1, row K>r,(zgVc  
    y'~U%,ki6  
        Next rowNum                         ' end loop over rows YY((V@|K  
        Close #1 ]&xk30  
    ?{|q5n  
        Print "File written: " & fullfilepath LX7FaW  
        Print "All done!!" z Rl3KjET  
    End Sub ~'iHo]9O  
    ~u!|qM  
    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: N^ds RYC  
    W*4-.*U8a  
    V2?=4mb  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 YEs&  
      
    djQH1^ (IU  
    "Hb"F?Yb  
    打开后,选择二维平面图: >CgTs  
    Lh"<XYY  
     
    分享到