切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1678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
    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。 F5Q. Vh  
    .p0n\ $r  
    成像示意图
    ,Y5 4(>>%  
    首先我们建立十字元件命名为Target ZXDMbMD  
    9a Ps_|C  
    创建方法: RkV3_c  
    ?&nz  
    面1 : m1; <T@  
    面型:plane ^yZSCrPGI  
    材料:Air ^Jpd9KK  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box .MPOUo/e  
    G}xBYc0b  
    xENA:j?kF  
    辅助数据: k+G4<qw  
    首先在第一行输入temperature :300K, k#+^=F^)I  
    emissivity:0.1; & ~G  
    ;B7|tajd  
    &>4$ [m>n  
    面2 : uOUw8  
    面型:plane A"ph!* i{  
    材料:Air J; Xz'0  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box I%*Z j,>  
    A_ z:^9  
    ct/THq  
    位置坐标:绕Z轴旋转90度, Ip\g ^ia  
    4IE#dwZW  
    Cu<ojN- $  
    辅助数据: o@~gg *  
    [c%}L 3B  
    首先在第一行输入temperature :300K,emissivity: 0.1; UiN ^x  
    {"(|oIo{  
    xW )8mv?4n  
    Target 元件距离坐标原点-161mm; #^w 1!xXD  
    }(O kl1  
     ]= D  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 ATewdq[C  
    E0Xu9IW/A  
    yf>,oNIAg  
    探测器参数设定: o%Q'<0d  
    ~2 ;y4%K  
    在菜单栏中选择Create/Element Primitive /plane 1:V/['|*g)  
    C>-"*Lt  
    Ek\Zi#f<  
    L7="!I  
    RS=7W._W  
    KA[Su0  
    元件半径为20mm*20,mm,距离坐标原点200mm。 F&Z>B};  
    lsxii-#O  
    光源创建: [qo* ,CRz  
    cW>`Z:6{K  
    光源类型选择为任意平面,光源半角设定为15度。 XwGJ 8&N  
     %tjEVQa  
    7P(:!ce4-  
    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。 PkO(Y!  
     KX@Fgs  
    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 32J  
    ?q7Gs)B=^'  
    u(qpdG||7  
    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。 }0*7bb  
    5PySCGv  
    创建分析面: KJ |1zCM  
    {GY$J<5=  
    P|4a}SWU  
    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。 ^ `9OA`2  
    hTqJDP"&F  
    HKf3eC  
    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。 AS398L  
    .- o,_eg1f  
    FRED在探测器上穿过多个像素点迭代来创建热图 q\G@Nn^  
    F U%b"gP^  
    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。 =Ih_[$1dw  
    将如下的代码放置在树形文件夹 Embedded Scripts, T~d';P  
    !h;VdCCi#  
    w-m2N-"= '  
    打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 QX/`s3N  
    U^S0H(>  
    绿色字体为说明文字, VzNH%  
    \^D`Hvg  
    '#Language "WWB-COM" A#{*A  
    'script for calculating thermal image map -A~<IyPt  
    'edited rnp 4 november 2005 dzap]RpB  
    9)`wd&!  
    'declarations ekXHfA!i%  
    Dim op As T_OPERATION EJsb{$u  
    Dim trm As T_TRIMVOLUME p<NgT1"{  
    Dim irrad(32,32) As Double 'make consistent with sampling g.qp _O  
    Dim temp As Double A1@a:P=  
    Dim emiss As Double 4O'ho0w7  
    Dim fname As String, fullfilepath As String TW$^]u~v  
    q Sah_N  
    'Option Explicit ^YV[1~O  
    _,QUH"  
    Sub Main ^  +G> N  
        'USER INPUTS ME"/%59r  
        nx = 31 GWsFW[T?~  
        ny = 31 9lwg`UWl,  
        numRays = 1000 :nn'>  
        minWave = 7    'microns 2TO1i0  
        maxWave = 11   'microns Y-9F*8<  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 Ex{]<6UAu  
        fname = "teapotimage.dat" #';r 0?|  
    *%.*vPJ  
        Print "" _;9)^})$  
        Print "THERMAL IMAGE CALCULATION" +Y+kx"8  
    {WChD&v  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 Ki2_Nh>tM  
    a7ty&[\  
        Print "found detector array at node " & detnode ] N8V?.|:  
    8dNJZoV  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 qp8;=Nfa  
    #=2~MXa@z7  
        Print "found differential detector area at node " & srcnode d4U_Wu&  
    yWy9IWI["  
        GetTrimVolume detnode, trm L!5HE])<)  
        detx = trm.xSemiApe 2epL!j)Wh  
        dety = trm.ySemiApe &^"m6  
        area = 4 * detx * dety rx<fjA%  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety 9 (Z)c  
        Print "sampling is " & nx & " by " & ny lnhZ!_  
    d*(1t\  
        'reset differential detector area dimensions to be consistent with sampling B7 T+a  
        pixelx = 2 * detx / nx E;SF f  
        pixely = 2 * dety / ny eL*Edl|#  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False V_:/#G]jeG  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 pAYuOk9n  
    6N ^FJCs  
        'reset the source power 4^ A\w  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) 6mZFsB  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" y}8j_r  
    mOBS[M5*  
        'zero out irradiance array S; >_9  
        For i = 0 To ny - 1 e |!i1e!  
            For j = 0 To nx - 1 Yd9y8Tq J  
                irrad(i,j) = 0.0 [>fE{ ~Y  
            Next j 5u8 YHv  
        Next i rTcH~s D`  
    SExd-=G  
        'main loop }\B6d\k  
        EnableTextPrinting( False ) q;U[f6JjE  
    }Q*8QV  
        ypos =  dety + pixely / 2 @uHNz-c  
        For i = 0 To ny - 1 DLVf7/=3~  
            xpos = -detx - pixelx / 2 3>Yec6Hs  
            ypos = ypos - pixely Q'Q^K  
    k&^fIz  
            EnableTextPrinting( True ) -LF^u;s8&S  
            Print i 0 I,-1o|s  
            EnableTextPrinting( False ) {ES3nCL(8  
    m$3&r2vgi  
    "&An9H'  
            For j = 0 To nx - 1 *v6'I-#  
    L(iWFy1& T  
                xpos = xpos + pixelx o(}vR<tD\  
    Gk<h_1WWK  
                'shift source VE!h!`<k  
                LockOperationUpdates srcnode, True h[Hw9$31  
                GetOperation srcnode, 1, op 0h* AtZv_  
                op.val1 = xpos 0@z78h=h  
                op.val2 = ypos qT(j%F  
                SetOperation srcnode, 1, op r>5,U:6Q/  
                LockOperationUpdates srcnode, False i=Y#kL~f  
    Y?Xs Z  
    raytrace WVKzh  
                DeleteRays cu |{cy-  
                CreateSource srcnode /P320[B}m&  
                TraceExisting 'draw {'JoVJKv  
    4Vh#Ye:`  
                'radiometry e4t'3So  
                For k = 0 To GetEntityCount()-1 [H!V  
                    If IsSurface( k ) Then ~G"5!,J  
                        temp = AuxDataGetData( k, "temperature" ) z@dHXj )  
                        emiss = AuxDataGetData( k, "emissivity" ) uSH.c>  
                        If ( temp <> 0 And emiss <> 0 ) Then ">|fB&~A  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) Xfe,ZC)  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) mI-$4st]  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi (c_E*>c)  
                        End If C"K(-/  
    XK>B mq/]  
                    End If .:E%cL +h  
    &W*9'vSm.  
                Next k //xxSk  
    so1% MV  
            Next j .z+ [3Oj_E  
    bNi\+=v<Ys  
        Next i D >$9(  
        EnableTextPrinting( True ) ~'n3],o?  
    &G:#7HX@-  
        'write out file n1X7T0'  
        fullfilepath = CurDir() & "\" & fname 4vF1  
        Open fullfilepath For Output As #1 i.Yz)Bw   
        Print #1, "GRID " & nx & " " & ny NLRgL'+F  
        Print #1, "1e+308" 7xqTTN6h  
        Print #1, pixelx & " " & pixely Z)?B5FF  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 ,5.ve)/dE  
    Ny\p$v "p  
        maxRow = nx - 1 <7-3j{065  
        maxCol = ny - 1 4@- 'p  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X)  Q#i[Y?$L  
                row = "" WZ> }  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) Xf(H_&K  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string [jU.58*  
            Next colNum                     ' end loop over columns yP. ,Dh s  
    ,ir(~g+{g  
                Print #1, row F$X"?fj  
    1%g%I8W%  
        Next rowNum                         ' end loop over rows K 0R<a~  
        Close #1 rE)lt0mkv  
    6B'd]Fe  
        Print "File written: " & fullfilepath 9l<f?OzAO  
        Print "All done!!" Z jLuqo  
    End Sub bLuAe EA  
    zT4SI'r?f  
    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: 3@7IY4>o  
     UDl[  
    ,NB?_\$c  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 iEjUo, Y[  
      
    AUBZ7*VO  
    EbXWCD  
    打开后,选择二维平面图: H}vq2|MN  
    7XrXx:*a5  
     
    分享到