切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1393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。 R36BvW0X  
    L*xu<(>K  
    成像示意图
    Y40`~  
    首先我们建立十字元件命名为Target ,m| :U  
    ~c&ygL3  
    创建方法: si:p98[w  
    "HCJ!  
    面1 : >wz& {9ni  
    面型:plane >h^CC*&'pw  
    材料:Air ]Ek6EuaK  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box !_Z\K$Ns  
    D# ZzhHHP  
    C&\MDOjx  
    辅助数据: ,(H`E?m1w4  
    首先在第一行输入temperature :300K, !^{0vFWE  
    emissivity:0.1; :6k8\{^9"D  
    EwvW: t1  
    \qx$h!<  
    面2 : ;D}8acQ  
    面型:plane ]JQ7x[  
    材料:Air r5U[jwP  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box snPM&  
    kD&% 7Vz  
    ]ow$VF{y  
    位置坐标:绕Z轴旋转90度, 42*y27Dtm  
    BHoy:Tp  
    Gk<M@d^hQ  
    辅助数据: Y?ADM(j  
    Af~>}-`a  
    首先在第一行输入temperature :300K,emissivity: 0.1; %49P<vo`?  
    [1+ o  
    V}?*kx~T2C  
    Target 元件距离坐标原点-161mm; ;WydXQ}Q^  
    L5(7;  
    Z>0a?=1[  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 v:2*<;  
    Un [olp  
    >3{#S:  
    探测器参数设定: B|\pzWD%  
    /y8=r"'G  
    在菜单栏中选择Create/Element Primitive /plane N4]Sp v  
    DGR[2C)@N  
    YJBlF2uD  
    <OX_6d*@  
    Ll" Kxg  
    YkOl@l$D  
    元件半径为20mm*20,mm,距离坐标原点200mm。 OZDd  
    9'1XZpM1  
    光源创建: vBFMne1h  
    gLm ]*  
    光源类型选择为任意平面,光源半角设定为15度。 T0:%,o  
    }> q%##<n  
    U*P&O+(1'  
    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。 4Ss4jUj  
    g0Rny  
    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 2O|jVGap5x  
    {RG4m{#9  
    `S`,H  
    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。 HPGIz!o  
    kn$2_I9  
    创建分析面: p(B^](?  
    xqZZ(jZ  
    }u3Q*oAGl  
    到这里元件参数设定完成,现在我们设定元件的光学属性,在前面我们分别对第一和第二面设定的温度和发射系数,散射属性我们设定为黑朗伯,4%的散射。并分别赋予到面一和面二。 35q4](o9"  
    6]%SSq&  
    S*aVcyDEP  
    到此,所有的光学结构和属性设定完成,通过光线追迹我们可以查看光线是否可以穿过元件。 x9DG87P~+  
    bD2):U*Fzo  
    FRED在探测器上穿过多个像素点迭代来创建热图 *5e"suS2  
    o\TXW qt  
    FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 0|Rt[qwKb@  
    将如下的代码放置在树形文件夹 Embedded Scripts, 2F}D?] A  
    Rcn6puZt  
    [6ycs[{!  
    打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 1 N{unS  
    G+_Q7-o&d6  
    绿色字体为说明文字, V4["+Y  
    [:hTwBRF  
    '#Language "WWB-COM" f9%M:cl  
    'script for calculating thermal image map pr=f6~Z-y  
    'edited rnp 4 november 2005 buj *L&  
    zl]Ic' _i  
    'declarations c"wk_ #  
    Dim op As T_OPERATION a)o-6  
    Dim trm As T_TRIMVOLUME !#NGGIp;  
    Dim irrad(32,32) As Double 'make consistent with sampling EDDld6O,  
    Dim temp As Double zfsGf 'U  
    Dim emiss As Double ydZS^BqG  
    Dim fname As String, fullfilepath As String  ~ERA  
    IPVD^a ?  
    'Option Explicit ln1QY"g  
    8wf[*6VwV  
    Sub Main -X]?ql*%`  
        'USER INPUTS Ii.?| u  
        nx = 31 su}n3NsJ  
        ny = 31 c,yjsxETW  
        numRays = 1000 M#u~]?hS  
        minWave = 7    'microns >h Rq  
        maxWave = 11   'microns FjU -t/  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 "<N2TDF5  
        fname = "teapotimage.dat"  Qi;62M  
    yq=rv$.s  
        Print "" BJDSk#!J!{  
        Print "THERMAL IMAGE CALCULATION" V* I2  
    %a=^T?8  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 DtFzT>$^F  
    W2w A66MB  
        Print "found detector array at node " & detnode K ; e R)  
    [uLpm*7  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 UhX)?'J  
    W<c95QD.  
        Print "found differential detector area at node " & srcnode 8XG|K`'u  
    PAy/"R9DT-  
        GetTrimVolume detnode, trm }2]m]D@%7  
        detx = trm.xSemiApe FoW|BGA~  
        dety = trm.ySemiApe KsDovy<  
        area = 4 * detx * dety s?yl4\]Muf  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety +H  SKFp  
        Print "sampling is " & nx & " by " & ny bH Nf>  
    ]r(&hqdR  
        'reset differential detector area dimensions to be consistent with sampling \c\z 6;j  
        pixelx = 2 * detx / nx (7 O?NS  
        pixely = 2 * dety / ny 0F-%C>&g  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False \%czNF  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 8dUP_t~d#q  
    W @]t  
        'reset the source power \sEH)$R'  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) %jh gKq  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" 2{9%E6%#  
    o:c:hSV  
        'zero out irradiance array C~X"ZW:d[  
        For i = 0 To ny - 1 ^|lw~F  
            For j = 0 To nx - 1 0..]c-V(G  
                irrad(i,j) = 0.0 x>Gx yVE  
            Next j v/GZByco>  
        Next i 18WJ*q7:  
    DEQ7u`6  
        'main loop  V$fn$=  
        EnableTextPrinting( False ) 9#:B_?e=  
    r!&}4lHYi  
        ypos =  dety + pixely / 2 oC~+K@S  
        For i = 0 To ny - 1 43s8a  
            xpos = -detx - pixelx / 2 K# kMz#B+i  
            ypos = ypos - pixely mO0}Go8  
     _W  
            EnableTextPrinting( True ) zrL+:/t  
            Print i eE5j6`5i  
            EnableTextPrinting( False ) 560`R>  
    'j$n;3  
    Ya29t 98Pk  
            For j = 0 To nx - 1 Lk]W?  
    x0||'0I0  
                xpos = xpos + pixelx I\<)9`O  
    71c(Nw~iQ  
                'shift source lQqP4-E?  
                LockOperationUpdates srcnode, True <"@5. f1"Y  
                GetOperation srcnode, 1, op +QA|]Y~!  
                op.val1 = xpos Ov@vNj&  
                op.val2 = ypos yqKSaPRA  
                SetOperation srcnode, 1, op "V <WC"  
                LockOperationUpdates srcnode, False "]}?{2i;  
    i}/Het+(  
    raytrace T-y5U},  
                DeleteRays `4-m$ab  
                CreateSource srcnode |e91KmiqJ  
                TraceExisting 'draw ]VoJ7LoCZ'  
    cuh Z_l  
                'radiometry l9naqb:iP  
                For k = 0 To GetEntityCount()-1 zsr;37  
                    If IsSurface( k ) Then 'xu! t'l&  
                        temp = AuxDataGetData( k, "temperature" ) "%ZAL\x  
                        emiss = AuxDataGetData( k, "emissivity" ) |w.h97fj  
                        If ( temp <> 0 And emiss <> 0 ) Then |4!G@-2V:I  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) b!T-{Ns6  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) L}VQc9"gc  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi #F#M<d3-2  
                        End If 4k)0OQeW6  
    =}%Q}aPp  
                    End If P=m l;xp  
    T\ [CQO  
                Next k Tbj}04;I  
    !X\aZ{}Q  
            Next j yL_ \&v  
    h* V~.H  
        Next i sMcN[r  
        EnableTextPrinting( True ) rw#?NI:  
    5P[urOvV  
        'write out file {yM@3v~  
        fullfilepath = CurDir() & "\" & fname -/R?D1kOq  
        Open fullfilepath For Output As #1 N~%~Q  
        Print #1, "GRID " & nx & " " & ny >/'/^h  
        Print #1, "1e+308" bd&Nf2  
        Print #1, pixelx & " " & pixely ok{ F=z  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 W)Mc$`nX  
    hR,5U=+M7  
        maxRow = nx - 1 I\f\k>;  
        maxCol = ny - 1 gT2k}5d}p  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) a"8H(HAlNn  
                row = "" aPin6L$;)  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) {j%7/T{  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string $AHdjQ[;6-  
            Next colNum                     ' end loop over columns V U~r~  
    [0H]L{yV  
                Print #1, row >g,i"Kg  
    .q'{ 3  
        Next rowNum                         ' end loop over rows SHQgI<D7  
        Close #1 :Fi$-g  
    w sbzGW~=  
        Print "File written: " & fullfilepath c3N,P<#  
        Print "All done!!" f\~A72-  
    End Sub <[V1z=Eo/]  
    Nuaq{cl  
    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: f`-UC_(;  
    AQ)J|i  
    }^azj>p5  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 ddEV@2F  
      
    ~N8$abQJV  
    4S*dNYc  
    打开后,选择二维平面图: i'z (`"  
    l8+;)2p!  
     
    分享到