切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1318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
    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。 Mc?_2<u-  
    Ic3a\FTr\  
    成像示意图
    JrBPx/?(,;  
    首先我们建立十字元件命名为Target 2m$C;j!D  
    p W[TufTa  
    创建方法: Wps^wY  
    W%rUa&00  
    面1 : E?]$Y[KJKs  
    面型:plane e/4C` J-  
    材料:Air ^C K!=oO  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box gPn0-)<  
    ftn10TO*  
    r;@0 F  
    辅助数据: 3uw3 [ SR1  
    首先在第一行输入temperature :300K, Csu9u'.V  
    emissivity:0.1; EuHQp7  
    xZ'C(~t  
    1!zd#TX  
    面2 : U>n[R/~]  
    面型:plane z&9ljQ iF  
    材料:Air h7eb/xEto  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box ;Q t%>Uo8  
    \6AM?}v  
    I?1 BGaAA  
    位置坐标:绕Z轴旋转90度, /\e_B6pF<  
    0<V/[$}\D  
    %S%UMA.  
    辅助数据: HMD\)vMK6  
    U^}7DJ  
    首先在第一行输入temperature :300K,emissivity: 0.1; q"269W:  
    zSA"f_e  
    #y&5pP:@  
    Target 元件距离坐标原点-161mm; fbM>jK  
    <XrXs  
    -V2f.QE%  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 #)L}{mHLM-  
    _*z ^PkH  
    fNda&  
    探测器参数设定: pa^_D~  
    B W)@.!C  
    在菜单栏中选择Create/Element Primitive /plane 1Y"9<ry  
    uNEl]Q]<e]  
    aY4v'[  
    ;0| :.q  
    GsO(\hR6^  
    ~zZOogM<  
    元件半径为20mm*20,mm,距离坐标原点200mm。 qQf NT.  
    N*[b 26  
    光源创建: x ;SY80D  
    ml2/}}  
    光源类型选择为任意平面,光源半角设定为15度。 %INkuNa8\  
    s3sD7 @  
    @[v,q_^8  
    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。  +mft  
    k{{ Y2B?C  
    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 e1b?TF@lz  
    0i5S=L`j  
    u)zv`m  
    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。 B&7:=t,m(  
    E>/~:  
    创建分析面: -G7)Y:  
    6pb~+=3n  
    +tt!xfy  
    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。 -cJ,rrN_9  
    h=6D=6c  
    # bjK]+  
    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。 |aU8WRq  
    )n<p_vz  
    FRED在探测器上穿过多个像素点迭代来创建热图 b+gu<##  
    } tBw<7fe  
    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。 }%c>Hh  
    将如下的代码放置在树形文件夹 Embedded Scripts, MGK?FJn_?  
    ue?3;BF 5  
    ' -9=>  
    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。 T12Zak4.=  
    SXe1Q8;  
    绿色字体为说明文字, i`<L#6RBT  
    L%3Bp/`S  
    '#Language "WWB-COM" ,cS_687o  
    'script for calculating thermal image map ZI4dD.B  
    'edited rnp 4 november 2005 Jqgm>\y  
    1R yE8DdP  
    'declarations AEx VKy  
    Dim op As T_OPERATION m6^#pqSL  
    Dim trm As T_TRIMVOLUME d@$bPQQ$,  
    Dim irrad(32,32) As Double 'make consistent with sampling +Q"~2_q5/;  
    Dim temp As Double \M|:EG%  
    Dim emiss As Double *ZLisq-f  
    Dim fname As String, fullfilepath As String 1M_Vhs^  
    (~bx%  
    'Option Explicit _NwHT`O[  
    Zv@ Fr9m  
    Sub Main j+dQI_']x  
        'USER INPUTS WI*CuJU<zJ  
        nx = 31 4M]l~9;A  
        ny = 31 Sp?e!`|8  
        numRays = 1000 5}_=q;sZ  
        minWave = 7    'microns j+3rS  
        maxWave = 11   'microns G,B4=[Y  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 XHdhSFpm  
        fname = "teapotimage.dat" IC8%E3  
    ~:0w%  
        Print "" zkqn>  
        Print "THERMAL IMAGE CALCULATION" ]xoG{%vgb  
    z$d<ep{6  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 k?L2LIB<  
    Nmt~1.J  
        Print "found detector array at node " & detnode D:IG;Rsc  
    $%'3w~h`  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 Wb cm1I)  
    QS\wtTXj  
        Print "found differential detector area at node " & srcnode d+5~^\lV  
    /NiD#s0t  
        GetTrimVolume detnode, trm RP+)sCh  
        detx = trm.xSemiApe H[OgnnM  
        dety = trm.ySemiApe Y6)o7t  
        area = 4 * detx * dety rev*G:  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety HOCj* O4  
        Print "sampling is " & nx & " by " & ny @^.W|Zh[&  
    ITn PF{N  
        'reset differential detector area dimensions to be consistent with sampling `F&~SU,  
        pixelx = 2 * detx / nx 1kvs2  
        pixely = 2 * dety / ny R?9x!@BV  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False 79d(UG'O  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 ,p(&G_  
    :-Py0{s  
        'reset the source power <Q- m &  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) 1 JIU5u)  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" d}ycC.h4k  
    '6>*J  
        'zero out irradiance array _'L16@q  
        For i = 0 To ny - 1 hLk6Hqr7  
            For j = 0 To nx - 1 z,^~H  
                irrad(i,j) = 0.0 hh%?E\qM  
            Next j *W^ZXhrZ  
        Next i uZ JfIC<>  
    6'@{ * u  
        'main loop T{f$S  
        EnableTextPrinting( False ) ez*QP|F*9  
    02*qf:kTnA  
        ypos =  dety + pixely / 2 0{8L^ jB/  
        For i = 0 To ny - 1 !d!u{1Y&  
            xpos = -detx - pixelx / 2 vW vu&3tx  
            ypos = ypos - pixely S7PWP< 9  
    66" 6>  
            EnableTextPrinting( True ) $8HiX6r  
            Print i %Pt){9b  
            EnableTextPrinting( False ) nQ_{IO8/6W  
    PcU~1m1  
    650qG$  
            For j = 0 To nx - 1 T :m" eD;  
    kC 6*An_f  
                xpos = xpos + pixelx 324XoMO  
    "opMS/a"7  
                'shift source +FqE fY4j  
                LockOperationUpdates srcnode, True p e+h8  
                GetOperation srcnode, 1, op fbOqxF"?we  
                op.val1 = xpos  fPPP|  
                op.val2 = ypos 0*rD'?)K+  
                SetOperation srcnode, 1, op +s"6[\H1d  
                LockOperationUpdates srcnode, False `V\?YS}  
    <EN9s  
    raytrace :Ez, GAk  
                DeleteRays p`c_5!H  
                CreateSource srcnode )S2yU<6oOt  
                TraceExisting 'draw h3k>WNT7  
    KAFR.h:p9  
                'radiometry 1nskf*Z  
                For k = 0 To GetEntityCount()-1 *pS 7,Hm  
                    If IsSurface( k ) Then \'*M }G  
                        temp = AuxDataGetData( k, "temperature" ) (A6~mi r!  
                        emiss = AuxDataGetData( k, "emissivity" ) /kkUEo+  
                        If ( temp <> 0 And emiss <> 0 ) Then _"yA1D0d_  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) fTvm2+.nX  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) c AEvv[  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi Im/tU6ybV  
                        End If A&~fw^HM  
    ~S\L(B(  
                    End If =huV(THU  
    +W*~=*h|  
                Next k `;;l {8  
    Hn(1_I%zF  
            Next j KBN% TqH|  
    &EQhk9j  
        Next i Rxd4{L )n  
        EnableTextPrinting( True ) PKSfu++Z  
    $P0q!  
        'write out file Q[7i  
        fullfilepath = CurDir() & "\" & fname PLc5m5  
        Open fullfilepath For Output As #1 GN(<$,~g  
        Print #1, "GRID " & nx & " " & ny `9J9[!+!`  
        Print #1, "1e+308" r%ES#\L6+|  
        Print #1, pixelx & " " & pixely iT4*~(p 3  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 Ytlzn%  
    YoKyiO!   
        maxRow = nx - 1 H,X|-B  
        maxCol = ny - 1 K ?!qNK  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) fj5 g\m  
                row = "" qMNW w\k  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) +hmFFQQ}  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string /^BC Qaj  
            Next colNum                     ' end loop over columns vv @m{,7#Y  
    -o6rY9\_!  
                Print #1, row 8I#ir4z#<  
    n_e'n|T  
        Next rowNum                         ' end loop over rows UUJQc ~=  
        Close #1 L9 D`hefz  
    kk3^m1  
        Print "File written: " & fullfilepath EbQLMLD%  
        Print "All done!!" PX 8UVA  
    End Sub [s {!  
    7mi!yTr}  
    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: }p7iv:P=3  
    ~hLan&T  
    GlAI~\A  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 KT(Z #$  
      
    )S)L9('IxT  
    ((k"*f2%  
    打开后,选择二维平面图: 5G* cAlU  
    F3qK6Ah.  
     
    分享到