切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1472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。 LMFK3Gd[  
    wI! +L&Q  
    成像示意图
    .6#cDrK  
    首先我们建立十字元件命名为Target 1GG>.RCP  
    kqD*TJA  
    创建方法: [O7w =  
    9$o<  
    面1 : 19F ;oFp  
    面型:plane 3+(yI 4  
    材料:Air T+;H#&  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box j?\$G.Y  
    j9URl$T:  
    LAv:+o(m/  
    辅助数据: 9jO`gWxV8*  
    首先在第一行输入temperature :300K, '7Mep ]  
    emissivity:0.1; v Zb|!#I  
    C5es2!^-]O  
    C}mYt/  
    面2 : X-kXg)!Bg  
    面型:plane |5=~(-I>@  
    材料:Air K`Bq(z?/  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box ^^7L"je]g  
    -ca7x`yo  
    M*5,O   
    位置坐标:绕Z轴旋转90度, ?}'N_n ys  
    7 9Qc`3a  
    &|Lh38s@$#  
    辅助数据: m$fQ`XzU  
    t_jyyHxoZ:  
    首先在第一行输入temperature :300K,emissivity: 0.1; k SB  
    O87"[c`>  
    @B,j;2eb  
    Target 元件距离坐标原点-161mm; xwPI  
    <nDNiM#  
    tJ=3'?T_k  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 ;asm 0H(  
    F:M>z=  
    R'6@n#:  
    探测器参数设定: EXA^!/)  
    )@}A r  
    在菜单栏中选择Create/Element Primitive /plane U/ ?F:QD4  
    7:n?PN(p6a  
    In f9wq\  
    ,*/Pg 52?  
    sYGR-:K  
    t]s94 R q  
    元件半径为20mm*20,mm,距离坐标原点200mm。 w#*/y?"D  
    M_k`%o  
    光源创建: -=>sTMWpr  
    wJ6_I$>  
    光源类型选择为任意平面,光源半角设定为15度。 60"5?=D  
    D=$4/D:;  
    ;0IvF#SJ(.  
    我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 s(teQ\  
    l+%Fl=Q2em  
    我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线 /@VsqD  
    8tU>DJ}0  
    R7lYu\mA  
    功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 v@VLVf)>9^  
    i8K_vo2Z)  
    创建分析面: (Aorx #z  
    jz*0`9&_  
    hjkLVL  
    到这里元件参数设定完成,现在我们设定元件的光学属性,在前面我们分别对第一和第二面设定的温度和发射系数,散射属性我们设定为黑朗伯,4%的散射。并分别赋予到面一和面二。 `M&P[ .9Pz  
    9I85EcT^4"  
    >-b&v$  
    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。 G\R*#4cF  
    W3)\co  
    FRED在探测器上穿过多个像素点迭代来创建热图 13H;p[$  
    iC\%_5/ _  
    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。 eNtf#Rqym  
    将如下的代码放置在树形文件夹 Embedded Scripts, G~"z_ (  
    xA92 C  
    'xIyGDe  
    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。 V\0E=M*P  
    sm0fAL  
    绿色字体为说明文字, vv+km+  
    2`EVdl7B]  
    '#Language "WWB-COM" i0>]CJG  
    'script for calculating thermal image map n+2%tW  
    'edited rnp 4 november 2005 Lbcy:E*g  
    %,0%NjK  
    'declarations I7~|~<  
    Dim op As T_OPERATION ?-f,8Z|h  
    Dim trm As T_TRIMVOLUME oe9lF*$/  
    Dim irrad(32,32) As Double 'make consistent with sampling !}_b|  
    Dim temp As Double GF*>~_Yr  
    Dim emiss As Double u"`*DFjo*  
    Dim fname As String, fullfilepath As String V^WU8x  
    9YD\~v;x  
    'Option Explicit #AShbl jm+  
    1c$vLo832  
    Sub Main 5MR,UgT  
        'USER INPUTS M%I@<~wl  
        nx = 31 2VA!&`I  
        ny = 31 R:M,tL-l  
        numRays = 1000 U6<M/>RG$  
        minWave = 7    'microns Xd3}Vn=  
        maxWave = 11   'microns 49AW6H.JT  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 c+g@Z"es  
        fname = "teapotimage.dat" ##cnFQCB  
    1yM r~Fo  
        Print "" 4 j X3lq|  
        Print "THERMAL IMAGE CALCULATION" 2Q@Y^t   
    :S -";.:"  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 gv|"OlB  
    Od##U6e`  
        Print "found detector array at node " & detnode ~W-cGb3c  
    zU&L.+   
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 "u492^  
    | &7S8Q  
        Print "found differential detector area at node " & srcnode BRzfic :e  
    :5b0np!  
        GetTrimVolume detnode, trm X:|8vS+0gU  
        detx = trm.xSemiApe "hQgLG  
        dety = trm.ySemiApe O6X"RsI}  
        area = 4 * detx * dety B $XwTJ>  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety O$D?A2eI  
        Print "sampling is " & nx & " by " & ny "g0(I8  
    u-3:k  
        'reset differential detector area dimensions to be consistent with sampling -DjJ",h( $  
        pixelx = 2 * detx / nx i{Ds&{  
        pixely = 2 * dety / ny nS9wb1Zl  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False ]JXKZV8$0  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 ;j9\b9m  
    @1:0h9%  
        'reset the source power A6 !F@Ic[  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) ]PR#W_&q  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" M'L;N!1A  
    %\Wf^6Y^  
        'zero out irradiance array Zsx3/}  
        For i = 0 To ny - 1 G^;>8r  
            For j = 0 To nx - 1 &%mXYj3y5  
                irrad(i,j) = 0.0 mbxbEqz  
            Next j !)pdamdA  
        Next i Ef)yQ  
    =Vw 5q},3  
        'main loop 'e!J06  
        EnableTextPrinting( False ) g[[;w*;z  
    CU)|-*uiK  
        ypos =  dety + pixely / 2 = 1.9/hW  
        For i = 0 To ny - 1 j Ux z  
            xpos = -detx - pixelx / 2 }H"kU2l  
            ypos = ypos - pixely bB}5U@G|  
    (Pbg[AY  
            EnableTextPrinting( True ) T~4N+fK  
            Print i 5d\q-d  
            EnableTextPrinting( False ) ~Z'w)!h  
    8|%^3O 0X  
    >e,mg8u6$  
            For j = 0 To nx - 1 Wwujh2g"0|  
    7U|mu~$.!  
                xpos = xpos + pixelx UVQ7L9%?f  
    7msAhz  
                'shift source T0zn,ej  
                LockOperationUpdates srcnode, True  ._O  
                GetOperation srcnode, 1, op hr GH}CU"  
                op.val1 = xpos Tr0B[QF  
                op.val2 = ypos 9f+>ix,ek*  
                SetOperation srcnode, 1, op G 2!xPHz  
                LockOperationUpdates srcnode, False jPZaD>!  
    cWyW~Ek  
    raytrace 9ZXlR?GA  
                DeleteRays j _L@U2i  
                CreateSource srcnode 3&&9_`r&_  
                TraceExisting 'draw ={>Lrig:l  
    X;v$5UKU  
                'radiometry Vv1|51B  
                For k = 0 To GetEntityCount()-1 E.|-?xQ6  
                    If IsSurface( k ) Then UFAL1c<V  
                        temp = AuxDataGetData( k, "temperature" ) I/gjenUK  
                        emiss = AuxDataGetData( k, "emissivity" )  ,Uhb  
                        If ( temp <> 0 And emiss <> 0 ) Then _j?e~w&0b  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) a2Pf/D]n  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) A+J*e  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi %\|'%/"`2(  
                        End If ~w8JH2O  
    +5VLw  
                    End If &`0/CV  
    ?;/^Ya1;Z  
                Next k LI2&&Mw  
    I$N8tn+E  
            Next j X3'H `/  
    ]I3!fEAWR  
        Next i J:&[ 59  
        EnableTextPrinting( True ) EnOU?D  
    MUfG?r\t  
        'write out file 2MZCw^s>  
        fullfilepath = CurDir() & "\" & fname EBz}|GY;  
        Open fullfilepath For Output As #1 (jU6GJRP  
        Print #1, "GRID " & nx & " " & ny ?v>ET2wD  
        Print #1, "1e+308" `;%]'F0`  
        Print #1, pixelx & " " & pixely otggN:^Qw  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 Z R/#V7Pj  
    4jD2FFG- G  
        maxRow = nx - 1 5waKI?4F  
        maxCol = ny - 1 zg-2C>(6a  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) M%jPH  
                row = "" Xd^\@  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) a5a($D  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string ~3uP6\F  
            Next colNum                     ' end loop over columns ")=X4]D  
    T)r9-wOq  
                Print #1, row [1.+H yJ}  
    "*G.EiLq  
        Next rowNum                         ' end loop over rows R<OI1,..r  
        Close #1 (?nCy HC%g  
    }.s~T#v  
        Print "File written: " & fullfilepath E[Cb|E  
        Print "All done!!" Z+@2"%W  
    End Sub pb~pN  
    g<~Cpd  
    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: &x3VCsC\|  
    rRFhGQq1m  
    %2v4<icvq  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 LD!Q8"  
      
    0jEL<TgC  
    )ZN|t?|  
    打开后,选择二维平面图: l+V>]?j  
    >,td(= :  
     
    分享到