切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 508阅读
    • 1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
    5786
    光币
    23082
    光券
    0
    只看楼主 正序阅读 楼主  发表于: 2023-04-06
    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。 LQ\ ELJj  
    \1mM5r~  
    成像示意图
    I49l2>  
    首先我们建立十字元件命名为Target 9LO.8Jy  
    &1E~ \8U  
    创建方法: zLw h6^?Y  
    ;q,)NAr&  
    面1 : %Mng8r  
    面型:plane S*4f%!  
    材料:Air -Bj.hx*  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box LFCTr/,  
    gzor%)C  
    ft{W/ * +_  
    辅助数据: &kb\,mQ  
    首先在第一行输入temperature :300K, llNXQlP\B  
    emissivity:0.1; TW>?h=.z  
    (G#}*  
    ICk(z~D~  
    面2 : }qG#N  
    面型:plane e{5,'(1]  
    材料:Air KL "Y!PN:  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box ])C>\@c6Gm  
    Lj4&_b9  
    j5zFDh1(  
    位置坐标:绕Z轴旋转90度, PJCnud F  
    |Td_S|:d  
    |H:<:*=6c  
    辅助数据: ai4PM b$p  
    [KMS<4t'  
    首先在第一行输入temperature :300K,emissivity: 0.1; 9X3yp:>V  
    t')h{2&&!2  
    jA,|JgN|n  
    Target 元件距离坐标原点-161mm; sv' Gt1&"Z  
    z4g+2f7h-X  
    Fqo&3+J4  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 d4J<,  
    zHV|-R  
    H"O$&  
    探测器参数设定: sW?B7o?  
    0vDg8i\  
    在菜单栏中选择Create/Element Primitive /plane @m?{80;uQ  
    $Buf#8)F*  
    QTYYghz  
    d Qai4e>[  
    %lV@:"G  
    rhIGOk1k  
    元件半径为20mm*20,mm,距离坐标原点200mm。 qL3@PSN?|  
    {EL'd!v7e  
    光源创建: FOSbe]  
    p'80d:  
    光源类型选择为任意平面,光源半角设定为15度。 b_vVB`>  
    ge$LIsE8  
    { UOhVJy  
    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。 9\>sDSCx  
    ) \ 4 |  
    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 6Hwxx5>r  
    9Eg&CZ,9$D  
    9^!wUwB  
    功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 .uKx>YB}  
     g#qNHR  
    创建分析面: )tD6=Iz^5  
    0 I @$ 0Gg  
    e />:K' {  
    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。 /W`$yM3  
    zP&q7 t;>  
    i b]vX-  
    到此,所有的光学结构和属性设定完成,通过光线追迹我们可以查看光线是否可以穿过元件。 (z2Z)_6L*L  
    {i>Jfl]G}  
    FRED在探测器上穿过多个像素点迭代来创建热图 thptm  
    5oJ Dux }  
    FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 8R}K?+]  
    将如下的代码放置在树形文件夹 Embedded Scripts, :+:6_x  
    <s}|ZnGE   
    x'qWM/  
    打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 Sdx Y>;  
    hiwIWd:H  
    绿色字体为说明文字, 30_ckMG"g  
    ~{M@?8wi  
    '#Language "WWB-COM" jo_ sAb  
    'script for calculating thermal image map KDD@%E  
    'edited rnp 4 november 2005 Sl>>SP  
    jV^C19  
    'declarations Hbk&6kS  
    Dim op As T_OPERATION ?'sXgo.}  
    Dim trm As T_TRIMVOLUME !5UfWk\G  
    Dim irrad(32,32) As Double 'make consistent with sampling x2k*| =$  
    Dim temp As Double ^i'y6J  
    Dim emiss As Double 8QF2^*RZ7z  
    Dim fname As String, fullfilepath As String .oR3Q/|k]  
    HE;V zR  
    'Option Explicit '9J*6uXf.  
    yU7I;]YP  
    Sub Main nm@']  
        'USER INPUTS >'`Sf ?+|  
        nx = 31 :<GfETIs  
        ny = 31 L2fVLK H  
        numRays = 1000 JMlV@t7y<  
        minWave = 7    'microns *vnXlV4L  
        maxWave = 11   'microns yN\e{;z`  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 }1U*A#aN7K  
        fname = "teapotimage.dat" #3 bv3m  
    =nU/ [T.  
        Print "" ZJ(rG((!  
        Print "THERMAL IMAGE CALCULATION" tg85:  
    ^u)rB<#BR  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 '7tBvVO_  
    m<:IFx#  
        Print "found detector array at node " & detnode -@M3Dwsi3  
    RUGv8"j  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 ~Ltr.ci  
    JE!("]&  
        Print "found differential detector area at node " & srcnode u 9]1X1wV  
    )X5(#E  
        GetTrimVolume detnode, trm 0@pu@DP~  
        detx = trm.xSemiApe } ` T8A  
        dety = trm.ySemiApe v <Hb-~  
        area = 4 * detx * dety KDey(DN:  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety Sj-[%D*  
        Print "sampling is " & nx & " by " & ny E>pVn2|  
    V1utUGJV  
        'reset differential detector area dimensions to be consistent with sampling Qhy#r  
        pixelx = 2 * detx / nx y3IWfiz>/d  
        pixely = 2 * dety / ny B~TN/sd  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False n &}s-`D  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 gyu6YD8L  
    HZZDv+  
        'reset the source power }1QF+C f  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) u7=T(4a  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" G7-!`-Nk  
    Gt~JA0+C)7  
        'zero out irradiance array (V?@?25  
        For i = 0 To ny - 1 : ejJV 6.  
            For j = 0 To nx - 1 uLVBM]Qj  
                irrad(i,j) = 0.0 };S0 G!  
            Next j x(~<tX~  
        Next i HI!4  
    C6QbBo  
        'main loop wss?|XCI  
        EnableTextPrinting( False ) M"wue*&  
    p2d\ZgWD=)  
        ypos =  dety + pixely / 2 #H5=a6E+q  
        For i = 0 To ny - 1 ^M[P-#X_  
            xpos = -detx - pixelx / 2 ^}>/n. %  
            ypos = ypos - pixely sN/+   
    N.hzKq][  
            EnableTextPrinting( True ) DWf$X1M  
            Print i 5DFZ^~  
            EnableTextPrinting( False ) {p/YCch,  
    g}Q x`65:  
    \ =nrt?  
            For j = 0 To nx - 1 ,rO[mNk9@  
    %l$W*.j|;  
                xpos = xpos + pixelx u \g ,.C0  
    va,~w(G  
                'shift source "s_Z&  
                LockOperationUpdates srcnode, True vVVPw?Ww-  
                GetOperation srcnode, 1, op $f-hUOuyo  
                op.val1 = xpos O#_x)13  
                op.val2 = ypos yV]xRaRr2  
                SetOperation srcnode, 1, op u$\a3yi  
                LockOperationUpdates srcnode, False MCYl{uH!  
    3-x%wD.  
    'raytrace `9 [i79U  
                DeleteRays geGeZ5+B  
                CreateSource srcnode 7z'h a?  
                TraceExisting 'draw $H*/;`,\[  
    xPC"c*  
                'radiometry }5n  
                For k = 0 To GetEntityCount()-1 p^X^1X7  
                    If IsSurface( k ) Then O@&+} D>  
                        temp = AuxDataGetData( k, "temperature" ) WS,7dz  
                        emiss = AuxDataGetData( k, "emissivity" ) Mv|!2 [:  
                        If ( temp <> 0 And emiss <> 0 ) Then '`l K'5;  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) Y25uU%6t_  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) )[&zCq Dc  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi #`ejU&!6  
                        End If ;j'Daupt;=  
    |wp ,f%WK  
                    End If _\zQ"y|G  
    3S"] u}  
                Next k d3^7ag%  
    IeTdN_8  
            Next j sb.J bE8  
    >"d?(@PJ  
        Next i E*CcV;  
        EnableTextPrinting( True ) 2@Lb foA  
    r88"#C6E'  
        'write out file <z0WLw0'z  
        fullfilepath = CurDir() & "\" & fname k<Sl1v K  
        Open fullfilepath For Output As #1 p/olCmHD)  
        Print #1, "GRID " & nx & " " & ny {j SmoA  
        Print #1, "1e+308" R7_VXvm>z  
        Print #1, pixelx & " " & pixely S# we3  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 ' Q7Y-V  
    jRQ+2@n{E  
        maxRow = nx - 1 |b.z*G  
        maxCol = ny - 1 T>d.#  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) \N6\v5vh  
                row = "" +%#8k9Y  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) Qvqqvk_tv  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string 2 y8~#*O  
            Next colNum                     ' end loop over columns I.V:q!4*  
    h @/;`E[  
                Print #1, row V3sL;  
    i[nF.I5*f  
        Next rowNum                         ' end loop over rows WES#ZYtT  
        Close #1 6mPm=I[oh  
    B3 zk(RNZ  
        Print "File written: " & fullfilepath sqO< J$tz  
        Print "All done!!" |:[9O`U)s  
    End Sub MC!ZX)mF  
    [EZYsOr.  
    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: ALT^8c&K  
    ]z ==   
    *l+Cl%e  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 [r-}bp'Gp  
      
    \caH pof  
    ^DAu5|--R  
    打开后,选择二维平面图: eSy(~Y  
    )&W**!(C  
     
    分享到
    在线谭健
    发帖
    6787
    光币
    23312
    光券
    0
    只看该作者 1楼 发表于: 2023-04-07
    感谢分享 lxb zHlX