切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1403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
    6401
    光币
    26150
    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。 W$OG( m!W>  
    l6kWQpV  
    成像示意图
    \$\ENQ;Nk  
    首先我们建立十字元件命名为Target TbGn46!:  
    /ZPyN<@  
    创建方法: X+S9{X#Cm  
    `-l6S  
    面1 : DV-;4AxxRq  
    面型:plane K4;'/cS  
    材料:Air $[&*Bj11Yg  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box f Tl<p&b  
    l q&wXi  
    FCuB\ Q  
    辅助数据: O#k6' LN?  
    首先在第一行输入temperature :300K, ~ZhraSI) G  
    emissivity:0.1; /8g^T")  
    g,95T Bc  
    qI<mjB{3`  
    面2 : 7cO n9fIE  
    面型:plane JSW}*HR  
    材料:Air ( ?{MEwHG  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box s,n0jix@  
    ,Bo>E:u  
    y_IM@)1H~  
    位置坐标:绕Z轴旋转90度, #Av.iAs  
    5v}8org  
     &8_gRP  
    辅助数据: ;)e2 @'Agl  
    .0rh y2  
    首先在第一行输入temperature :300K,emissivity: 0.1; wK-3+&,9  
    QxOjOKAG  
    oMTf"0EIW  
    Target 元件距离坐标原点-161mm; xA$nsZ]  
    Q|L9g z[?  
    C@W"yYt  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 YY!6/5*/]  
    #w-xBM @  
    ``e$AS  
    探测器参数设定: Pgus42f%  
    qt 2d\f  
    在菜单栏中选择Create/Element Primitive /plane D] ~MC  
    K7Wk6Aw  
    !\L/[:n  
    meks RcF  
    '-b*EZU8t  
     S"$m]  
    元件半径为20mm*20,mm,距离坐标原点200mm。 u[/m|z  
    MR<;i2p  
    光源创建: Ej>g.vp8I  
    m"jV}@agX  
    光源类型选择为任意平面,光源半角设定为15度。 R&';Oro  
    _Bp1co85MQ  
    c#]q^L\x  
    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。 <xC#@OZ  
    HcV"X,7S  
    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 5N*Ux4M  
    dwd:6.J(  
    {aJJ `t  
    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。 qt^T6+faaQ  
    | j a-  
    创建分析面: 'ao"9-c  
    e|D ;OM  
    w MP  
    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。 y>|{YWbp?  
    !G}+E2fDA  
    `z )N,fF  
    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。 FEW_bP/4  
    D"ehWLj  
    FRED在探测器上穿过多个像素点迭代来创建热图 S^<g_ q  
    3LTcEd  
    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。 0#*#a13  
    将如下的代码放置在树形文件夹 Embedded Scripts, UNi`P9D]3  
    01. &> Duw  
    g{9+O7q  
    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。 b-*3 2Y%  
    dwv6;x  
    绿色字体为说明文字, ;6{@^  
    u=/CRjot  
    '#Language "WWB-COM" yxq}QSb \3  
    'script for calculating thermal image map lP!;3iJ B  
    'edited rnp 4 november 2005 "a/ Q%.P  
    FwZ>{~?3  
    'declarations P7f,OY<@%o  
    Dim op As T_OPERATION .eO?Z^  
    Dim trm As T_TRIMVOLUME w L^%w9q-  
    Dim irrad(32,32) As Double 'make consistent with sampling NwR}yb6  
    Dim temp As Double TbF4/T1b  
    Dim emiss As Double OOz[-j>'Y+  
    Dim fname As String, fullfilepath As String b (I2m  
    ? j 9|5*  
    'Option Explicit e=QK}gzX  
    'vaLUy9]  
    Sub Main d'Axum@  
        'USER INPUTS @M8|(N%  
        nx = 31 T}=>C+3r  
        ny = 31 {?}*1,I  
        numRays = 1000 #vqo -y7@  
        minWave = 7    'microns @IP)S[^' t  
        maxWave = 11   'microns "h7tnMS  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 z]bwnJfd  
        fname = "teapotimage.dat" F[!ckes<bB  
    ,mL !(US  
        Print "" 34R!x6W0  
        Print "THERMAL IMAGE CALCULATION" M}wXJ8aF?  
    $CE[MZ&S  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 `K >?ju"  
    AisN@  
        Print "found detector array at node " & detnode \rV B5|D?  
    oq_6L\ ~  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 |J~eLh[d  
    ^v@4|E$  
        Print "found differential detector area at node " & srcnode ?<yM7O,4  
    =0'q!}._!  
        GetTrimVolume detnode, trm 5Fm=/o1  
        detx = trm.xSemiApe A;u"<KG?  
        dety = trm.ySemiApe " uPy,<l  
        area = 4 * detx * dety R, 8s_jN  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety <p?&udqD  
        Print "sampling is " & nx & " by " & ny lRP1&FH0  
    ?n\*,{9  
        'reset differential detector area dimensions to be consistent with sampling y9|K|xO[  
        pixelx = 2 * detx / nx *X38{r j  
        pixely = 2 * dety / ny qJ_1*!!91  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False ro[Y-o5Q0  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 KZBrE$@%5  
    g+C!kaC)  
        'reset the source power TjBY 4  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) [ &qA\  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" M'1!<a-Mp  
    4E:bp   
        'zero out irradiance array b( ^^m:(w  
        For i = 0 To ny - 1 jAsO8  
            For j = 0 To nx - 1 r CRgzC  
                irrad(i,j) = 0.0 B )JM%r  
            Next j mty1p'^KQ  
        Next i 2~;&g?T6  
    %:qoV0DR  
        'main loop lKEa)KF[  
        EnableTextPrinting( False ) mEuHl>  
    ,`8Y8  
        ypos =  dety + pixely / 2 5H:@ 8,B  
        For i = 0 To ny - 1 n|4;Hn1V  
            xpos = -detx - pixelx / 2 m$$?icA  
            ypos = ypos - pixely 0D(cXzQP  
    G;oFTP>o  
            EnableTextPrinting( True ) (a6?s{(  
            Print i b]]N{: I  
            EnableTextPrinting( False ) C6& ( c  
    .#5l$['  
    Jll-X\O`-  
            For j = 0 To nx - 1 nD,{3B#  
    *,\` o~  
                xpos = xpos + pixelx .%0ne:5  
     9|S`ub'  
                'shift source qSO*$1i  
                LockOperationUpdates srcnode, True X^@[G8v%  
                GetOperation srcnode, 1, op ]5v:5:H  
                op.val1 = xpos 8Xm@r#Oy5  
                op.val2 = ypos ev>oC~>s  
                SetOperation srcnode, 1, op 3#<* k>1G?  
                LockOperationUpdates srcnode, False 2go>  
    =`I?mn&  
    raytrace P?3{z="LzJ  
                DeleteRays (3EUy"z-  
                CreateSource srcnode y>(rZ^y&  
                TraceExisting 'draw uf@U:V  
    =V^@%YIn  
                'radiometry zb2K;%Qs+f  
                For k = 0 To GetEntityCount()-1 f(u&XuZ  
                    If IsSurface( k ) Then En9R>A;`  
                        temp = AuxDataGetData( k, "temperature" ) amB@N6*  
                        emiss = AuxDataGetData( k, "emissivity" ) }BN\/;<A  
                        If ( temp <> 0 And emiss <> 0 ) Then _qTpy)+  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) {&nV4c$v  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) < `Z%O<X  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi te2 Iu%5 z  
                        End If ~/`X*n&  
    TV{)n'aA  
                    End If cj(X2L  
    f:%SW  
                Next k ^&:'NR  
    c)1=U_61  
            Next j =&0U`P$`  
    "r-l8r,  
        Next i x9}++r  
        EnableTextPrinting( True ) [b5(XIGUN}  
    w6EI{  
        'write out file X7e/:._SAH  
        fullfilepath = CurDir() & "\" & fname hmGdjw t$  
        Open fullfilepath For Output As #1 v'nHFC+p  
        Print #1, "GRID " & nx & " " & ny Uh+jt,RB`  
        Print #1, "1e+308" org*z!;.   
        Print #1, pixelx & " " & pixely OKQLv+q5K)  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 !s-/0ugZ  
    `)tK^[,<W  
        maxRow = nx - 1 piu0^vEEH  
        maxCol = ny - 1 <PD|_nZT  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) q$^<zY  
                row = "" &"j@79Ym1~  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) )Z:m)k>r;  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string deM~[1e[  
            Next colNum                     ' end loop over columns kGD|c=K}  
    !3KPwI,  
                Print #1, row *o|p)lH  
    Cj$H[K}>  
        Next rowNum                         ' end loop over rows =8S}Iat  
        Close #1 WTu{,Q  
    y#r\b6  
        Print "File written: " & fullfilepath {U P_i2`.  
        Print "All done!!" K.h]JD]o  
    End Sub /.-m}0h|W-  
    ' PL_~  
    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: /'+4vXc@  
    M+UMR+K  
    w)<4>(D  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 0|Q.U  
      
    {Pvr??"r  
    Ty}R^cy{d  
    打开后,选择二维平面图: W^ClHQ"Iy  
    dM gbW<uAu  
     
    分享到