切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1424阅读
    • 0回复

    [分享]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
    6405
    光币
    26170
    光券
    0
    只看楼主 倒序阅读 楼主  发表于: 2020-11-18
    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。 '|^<|S_+K  
    %6eQ;Rp*  
    成像示意图
    1'Y7h;\~\  
    首先我们建立十字元件命名为Target 0` \!O(jJ  
    $>=?'wr  
    创建方法: BA(PWX`H  
    O{w'i|  
    面1 : Tj v)jD  
    面型:plane k2Y *  
    材料:Air w:+wx/\  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box cH>3|B*y  
    N~t4qlC/  
    H". [&VP5Z  
    辅助数据: B9i< ="=p  
    首先在第一行输入temperature :300K, CP"  
    emissivity:0.1; LL"c 9jb4z  
    X8Y)5,`s  
    *j"u~ N F  
    面2 : |];f?1  
    面型:plane iz @LS  
    材料:Air $G}!eV 6  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box qnCJrY6]  
    LCouDk(=`  
    VS ?npH  
    位置坐标:绕Z轴旋转90度,  L$Yg*]\  
    F*rsi7#!pG  
    3tu:Vc.:M  
    辅助数据: "B3&v%b  
    $9}jU#Z|hd  
    首先在第一行输入temperature :300K,emissivity: 0.1; lZ>j:/R8^&  
    $l+DkR+  
    !Pf6UNN'  
    Target 元件距离坐标原点-161mm; tTcff9ee  
    q88;{?T1  
    }ofx?s}  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 ;VW->i a6  
    <7 R+p;y  
    :Cdqj0O3u  
    探测器参数设定: PqVz ^(Wz  
    g;mX{p_@  
    在菜单栏中选择Create/Element Primitive /plane wpI_yp  
    jWjp0ii  
    c[<>e#s+;  
    }{y(&Oy3Y  
    CD:$22*]  
    YQ$EN>.eO  
    元件半径为20mm*20,mm,距离坐标原点200mm。 V(c>1xLlz  
    N3$%!\~O  
    光源创建: V N<omi+4  
    ^<OcbOn;O  
    光源类型选择为任意平面,光源半角设定为15度。 %`)lCK)2  
    `%ulorS  
    7I4<Dj  
    我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 _-c1" Kl  
    MR3\7D+9y  
    我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线 rJ=r_v  
    y)*W!]:7^>  
    V7(-<})8  
    功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 LTlbrB  
    ;6AanwR6  
    创建分析面: b9RJ>K  
    #w6ty<b;  
    V ah&)&n  
    到这里元件参数设定完成,现在我们设定元件的光学属性,在前面我们分别对第一和第二面设定的温度和发射系数,散射属性我们设定为黑朗伯,4%的散射。并分别赋予到面一和面二。 ec3zoKtV  
    `W9~u: F  
    ,`,1s 9\&t  
    到此,所有的光学结构和属性设定完成,通过光线追迹我们可以查看光线是否可以穿过元件。 k(ho?  
    K=N8O8R$y  
    FRED在探测器上穿过多个像素点迭代来创建热图 cJLAP%.L  
    p G(Fw>  
    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。 [!ilcHE)  
    将如下的代码放置在树形文件夹 Embedded Scripts, G<M9 6V  
    FaQz03N\  
    C/#?S=w`4  
    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。 X+[h]A  
    twP%+/g]<  
    绿色字体为说明文字, w:nLm,  
    S8k<}5  
    '#Language "WWB-COM" RaC8Sq7hW  
    'script for calculating thermal image map t>}(` 0  
    'edited rnp 4 november 2005 m(KBg'kQ  
    DI0Wk^m  
    'declarations P{+,?X\  
    Dim op As T_OPERATION T6nc/|Ot  
    Dim trm As T_TRIMVOLUME Dp-j(F  
    Dim irrad(32,32) As Double 'make consistent with sampling 4QBPN@~t  
    Dim temp As Double }Uue}VOA  
    Dim emiss As Double ^y.|KA3[  
    Dim fname As String, fullfilepath As String e:+[}I)  
    9Yhl q$;g  
    'Option Explicit szUJh9-  
    h!J|4Q a  
    Sub Main Aaug0X  
        'USER INPUTS M3!4,_!~  
        nx = 31 ^GnR1.ux  
        ny = 31 ? J/NYV  
        numRays = 1000 Go)}%[@w  
        minWave = 7    'microns Vy7 )_D  
        maxWave = 11   'microns q+2v9K@  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 I(uM`g  
        fname = "teapotimage.dat" hdDL92JVg  
    kgP6'`}E[  
        Print "" d]vom@iI  
        Print "THERMAL IMAGE CALCULATION" )nlFyWXh.  
    t~%(Zu>S  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 *:?XbtIK u  
    "EBCf.3-  
        Print "found detector array at node " & detnode BVG.ZZR})  
    }poLH S/  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 KEjMxOv1  
    8Om4G]*|,  
        Print "found differential detector area at node " & srcnode s\e b  
    7Qd boEa  
        GetTrimVolume detnode, trm 4m!w<c0NL  
        detx = trm.xSemiApe  6apK  
        dety = trm.ySemiApe cq~~a(IS  
        area = 4 * detx * dety v;#0h7qd  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety Nz>xilU'  
        Print "sampling is " & nx & " by " & ny M>ntldV#g%  
    9L>73P{_  
        'reset differential detector area dimensions to be consistent with sampling w[g`)8Ib  
        pixelx = 2 * detx / nx kTA4!654  
        pixely = 2 * dety / ny 0[p"8+x  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False Ctbc!<@o  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 rP IAu[],g  
    !b?cY{  
        'reset the source power "dHo6CT,y_  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) %awr3h>$  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" =w7+Yt  
    Q@[(0R1  
        'zero out irradiance array d^8n  
        For i = 0 To ny - 1 hjz`0AS  
            For j = 0 To nx - 1 YB.@zL0.(  
                irrad(i,j) = 0.0 S@Aw1i p  
            Next j &q +l5L"  
        Next i qq"0X! w  
    qfqL"G  
        'main loop |3g'~E?$  
        EnableTextPrinting( False ) ~Rw][Ys  
    qW S"I+o,S  
        ypos =  dety + pixely / 2 Y*sw;2Z;a  
        For i = 0 To ny - 1 nF]zd%h  
            xpos = -detx - pixelx / 2 EFv^uve  
            ypos = ypos - pixely #u3E{NB  
    Bm  4$  
            EnableTextPrinting( True ) Sa@T#%oU  
            Print i N]-skz<v  
            EnableTextPrinting( False ) K5F;/ KR"  
    (9b%'@A@m  
    -/:K.SY,  
            For j = 0 To nx - 1 .yHi"ss3  
    .\ :MB7p  
                xpos = xpos + pixelx & jm1  
    JAy-N bb\  
                'shift source BS%pS(  
                LockOperationUpdates srcnode, True LtPaTe  
                GetOperation srcnode, 1, op jp|*kBDq\  
                op.val1 = xpos N*+WGsxl$z  
                op.val2 = ypos :<HLw.4O  
                SetOperation srcnode, 1, op z pDc~ebh  
                LockOperationUpdates srcnode, False i(kx'ua?  
    _{n4jdw%(  
                'raytrace ]|u7P{Z"R  
                DeleteRays ~V0 GRPnI  
                CreateSource srcnode @"H7Q1Hg!*  
                TraceExisting 'draw 1jE {]/Y7&  
    #Jt1AV  
                'radiometry sFHqLG{/  
                For k = 0 To GetEntityCount()-1 /qFY $vj  
                    If IsSurface( k ) Then 0`Uw[Er&  
                        temp = AuxDataGetData( k, "temperature" ) r;p@T8k  
                        emiss = AuxDataGetData( k, "emissivity" ) <[$a7l i  
                        If ( temp <> 0 And emiss <> 0 ) Then 7}e5ac  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) ;@ G^eQ  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) w`v` aw]  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi FAX[| p  
                        End If y}?PyPz  
    4*inN~cU  
                    End If C-g,uARX(r  
    {`-AIlH(  
                Next k DK20}&RQ  
    %<8r`BMo  
            Next j %Y,Ru)5}  
    KpDb%j  
        Next i 85$ WH  
        EnableTextPrinting( True ) +hX =  
    2vhP'?;K  
        'write out file qJ2Z5  
        fullfilepath = CurDir() & "\" & fname gYbcBb%z  
        Open fullfilepath For Output As #1 AMASh*  
        Print #1, "GRID " & nx & " " & ny KK{_s=t%<  
        Print #1, "1e+308" CH q5KB98+  
        Print #1, pixelx & " " & pixely [XubzZ9  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 aX*9T8H/  
    .jiJgUa7  
        maxRow = nx - 1 OUFy=5(%:  
        maxCol = ny - 1 d[  _@l  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) :*^aSPlV  
                row = "" ";7/8(LBZ  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) r4<As`&  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string mwsdl^c  
            Next colNum                     ' end loop over columns ; 6PRi/@  
    u,{R,hTDS  
                Print #1, row j\zlp  
    j"fx|6l)  
        Next rowNum                         ' end loop over rows q*tGlM@R?  
        Close #1 7GS 4gSd3  
    [lVfhXc&  
        Print "File written: " & fullfilepath C%{2 sMJz  
        Print "All done!!" (nXnP{yb  
    End Sub m*YfbOhs#  
    X|G[Ma?   
    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: 8aKS=(Z!j  
    ZJm$7T)V  
    1Kr$JIcd  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 =qpGAv_#  
      
    t0r0{:  
    gsUF\4A(J  
    打开后,选择二维平面图: fK *l?Hr  
    ^2{6W6=  
    QQ:2987619807
    u&[L!w  
     
    分享到