切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1626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
    在线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。 M=;csazN  
    #BBDI  
    成像示意图
    D60quEe3%  
    首先我们建立十字元件命名为Target {{P 3Z[  
    s-WZ3g  
    创建方法: 8i73iTg(  
    _^b\#Jz4U3  
    面1 : l6WEx -d  
    面型:plane b~>@x{  
    材料:Air >E4,zs@7t  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box Lc}hjK  
    iExKi1knx  
    k CGb~+  
    辅助数据: [T7&)p  
    首先在第一行输入temperature :300K, +0ukLc@  
    emissivity:0.1; A#I&&qZ  
    ~$4(|Fq/  
    [olSgq!3  
    面2 : {N{eOa<HA  
    面型:plane `&fW<5-  
    材料:Air :EHk]Hkz  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box RXAE jzf   
    |-{ Hy(9  
    @(6i 1Iwu9  
    位置坐标:绕Z轴旋转90度, ^u$=<66  
    pwHe&7e#  
    mk~CE  
    辅助数据: H'!OEZ  
    v ))`U,Gm  
    首先在第一行输入temperature :300K,emissivity: 0.1; Z D"*fr  
    lbovwj  
    z0ufLxq  
    Target 元件距离坐标原点-161mm; \^y~w~g?  
    xh#_K@8  
    C "@>NC_  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 OMjPC_  
    b+whZtNk7  
    .0U[n t6  
    探测器参数设定: z@19gD#8  
    R7z @y o  
    在菜单栏中选择Create/Element Primitive /plane 1qn/*9W}=  
    5 8;OTDR!  
    X{!,j}  
    =m (u=|N3  
    5W fZd  
    w0$+v/  
    元件半径为20mm*20,mm,距离坐标原点200mm。 ^5~x*=_  
    PEjd  
    光源创建: gk8 v{'0Er  
    k-^^Ao*@  
    光源类型选择为任意平面,光源半角设定为15度。  1 <T|  
    c%b|+4 }x  
    -9+$z|K  
    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。 *tpS6{4=#7  
    pQ7elv]  
    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 GK11fZpO:i  
    .%W.uF^  
    @ kv~2m  
    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。 9CwtBil<#g  
    |)jR|8MAE  
    创建分析面: wt@TR~a  
    QRl+7V  
    U_aI!`WXd  
    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。 6f#Mi+"  
    vzSjfv  
    PW"?* ~&  
    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。 ia /#`#.  
    oTb42a_j{  
    FRED在探测器上穿过多个像素点迭代来创建热图 Fpn'0&~-fi  
    n3U| d+  
    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。 &dw=jHt  
    将如下的代码放置在树形文件夹 Embedded Scripts, n?q+:P  
    /: \27n  
    r_bG+iw7p  
    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。 zU0JwZi  
    c-.F {~  
    绿色字体为说明文字, {4[dHfIy  
    n2c(x\DA&  
    '#Language "WWB-COM" <H<Aba9\  
    'script for calculating thermal image map SZtSUt(ss  
    'edited rnp 4 november 2005 @sd{V  
    {~g7&+9x*  
    'declarations k{Y\YG%b  
    Dim op As T_OPERATION 9~K>c  
    Dim trm As T_TRIMVOLUME hlc g[Qdo*  
    Dim irrad(32,32) As Double 'make consistent with sampling ib]<;t  
    Dim temp As Double ^pfM/LQ@  
    Dim emiss As Double w}07u5  
    Dim fname As String, fullfilepath As String _q@lP|  
    7:$dl #  
    'Option Explicit Bv*VNfUm  
    F$:mGyl5_  
    Sub Main w+\RSqz/  
        'USER INPUTS 9/&1lFKJ  
        nx = 31 Y<@_d  
        ny = 31 _m#TL60m  
        numRays = 1000 ~xPetkl@  
        minWave = 7    'microns <A\g*ld  
        maxWave = 11   'microns n*|8 (fD  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 5(Q-||J  
        fname = "teapotimage.dat" l`j@QP  
    [>j.x2=  
        Print "" NLgeBLB  
        Print "THERMAL IMAGE CALCULATION" xw1,Wbu]  
    %$_?%X0=t  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点  NY[48H  
    <X97W\  
        Print "found detector array at node " & detnode ~g~`,:Qc  
    bhZ5-wo4%  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 W^H[rX}=  
    vL"n oLs  
        Print "found differential detector area at node " & srcnode =7 -k D3  
    %uP/v\l  
        GetTrimVolume detnode, trm 8L@@UUjr  
        detx = trm.xSemiApe {+9t!'   
        dety = trm.ySemiApe N=8CVI  
        area = 4 * detx * dety 3VQmo\li  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety "(+aWvb  
        Print "sampling is " & nx & " by " & ny !) d  
    7:.!R^5H  
        'reset differential detector area dimensions to be consistent with sampling Z3Xgi~c  
        pixelx = 2 * detx / nx G6"4JTWO  
        pixely = 2 * dety / ny 9<Th: t|w  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False FQMA0"(G$  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 fX&g. fH  
    Q6[h;lzGV  
        'reset the source power :f RGXrn  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) I =K<%.  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" kw1Lm1C  
    z-S8s2.Fd  
        'zero out irradiance array ,#.^2O9-^  
        For i = 0 To ny - 1 v[m1R'  
            For j = 0 To nx - 1 /q`f3OV"  
                irrad(i,j) = 0.0 &#]||T-  
            Next j Nn5sD3z#  
        Next i baf@"P9@\A  
    {JcMJZ3  
        'main loop <,nd]a  
        EnableTextPrinting( False ) _1\H{x  
    .noY[P 8i  
        ypos =  dety + pixely / 2 -]MZP:s  
        For i = 0 To ny - 1 *>j4tA{b@v  
            xpos = -detx - pixelx / 2 ) .H nK  
            ypos = ypos - pixely xSjs+Y;Mu  
    j 2Jew  
            EnableTextPrinting( True ) o6:p2W  
            Print i ~eGtoEY  
            EnableTextPrinting( False ) pkA(\0E8  
    ZpU4"x>  
    \88 IFE  
            For j = 0 To nx - 1 `XbV*{7  
    EPeV1$  
                xpos = xpos + pixelx ns8I_H  
    FBI^}^#_  
                'shift source ^eqq|(<K  
                LockOperationUpdates srcnode, True 7(5 wP(  
                GetOperation srcnode, 1, op ]<E\J+5K  
                op.val1 = xpos t*!Q9GC_  
                op.val2 = ypos Gh{vExH@5(  
                SetOperation srcnode, 1, op cU=EXyP%  
                LockOperationUpdates srcnode, False [UaM}-eR  
    XE*#5u8t  
    raytrace .n| M5X  
                DeleteRays ,W;2A0A?X  
                CreateSource srcnode *s"{JrG`O  
                TraceExisting 'draw <F5x}i~(C  
    e%&/K7I"?  
                'radiometry 5A"OL6ty  
                For k = 0 To GetEntityCount()-1 +t;j5\HS  
                    If IsSurface( k ) Then H52] Zm  
                        temp = AuxDataGetData( k, "temperature" ) +Tp>3Jh2  
                        emiss = AuxDataGetData( k, "emissivity" ) ob>2SU[Y  
                        If ( temp <> 0 And emiss <> 0 ) Then ,7|2K&C5  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) c5tCw3$t  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) nrI-F,1  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi (K->5rSU  
                        End If yi3Cd@t({{  
    '${xZrzmt  
                    End If IqmoWn3  
    &]HY:  
                Next k d+Jj4OnP  
    <al/>7z' O  
            Next j . [\S=K|/  
    H!dg(d^  
        Next i skn];%[v\  
        EnableTextPrinting( True ) 5J8U] :Y)  
    @phb5  
        'write out file cYp]zn+6  
        fullfilepath = CurDir() & "\" & fname SdBo sB3v>  
        Open fullfilepath For Output As #1 ;3WVrYe  
        Print #1, "GRID " & nx & " " & ny L+y90 T6?  
        Print #1, "1e+308" '\.fG\xD  
        Print #1, pixelx & " " & pixely {kgV3 [%>  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 F2RU7o'f.  
    3]}wZY0  
        maxRow = nx - 1 }*I:0"WH  
        maxCol = ny - 1 .#y.:Pb|e  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) %B'*eBj~fw  
                row = "" I= 'S).  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) ohe0}~)V  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string 9.qjEe  
            Next colNum                     ' end loop over columns YYUWBnf30G  
    U(cV#@Y  
                Print #1, row w qLY \  
    ?4,e?S6,[  
        Next rowNum                         ' end loop over rows _+hf.[""  
        Close #1 y0D="2)  
    0W I3m2i  
        Print "File written: " & fullfilepath (},TZ+u  
        Print "All done!!" +WYXj  
    End Sub I+]q;dF;  
    ^ LT KX`p  
    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: NiQ_0Y}  
    Una7O]  
    hWujio/h  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 @] ` _+\y  
      
     0"_FQv  
    xi2!__  
    打开后,选择二维平面图: OZ6g u$ n*  
    6Tn.56X  
     
    分享到