切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1285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
    6385
    光币
    26070
    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。 uaPx"  
    Me3dpF  
    成像示意图
    |NFZ(6vNh  
    首先我们建立十字元件命名为Target Fke//- R  
    t0E51Ic@  
    创建方法: x!< yT?A  
    zw@'vncc  
    面1 : EG<s_d?  
    面型:plane @x&P9M0g  
    材料:Air E8[T   
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box L"+$Wc[|  
    I:j3sy  
    (R}ii}&  
    辅助数据: ef"?|sn  
    首先在第一行输入temperature :300K, S~OhtHwK  
    emissivity:0.1; 3`.P'Fh(k  
    ~l E _L1-c  
    1R%1h9I4'  
    面2 : Wd,a?31|  
    面型:plane 7Ke&0eAw  
    材料:Air Z}6^ve  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box 5jcte< 5I_  
    v $({C  
    9WG{p[  
    位置坐标:绕Z轴旋转90度, 4_?7&G0(  
    8MwK.H[U  
    1 jb/o5n;  
    辅助数据: G=9d&N  
    gXFWxT8S  
    首先在第一行输入temperature :300K,emissivity: 0.1; } ?@5W,  
    ^eq</5q D  
    \_6OCVil  
    Target 元件距离坐标原点-161mm; +>f<EPGn  
    HfNDD| Zz  
    vG41Ck1  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 (=x"Y{%  
    o2H1N~e#c  
    3(E $I5  
    探测器参数设定: ` |Z}2vo;j  
    tfO#vw,@  
    在菜单栏中选择Create/Element Primitive /plane uRV<?y%  
    B^ 7eoW  
    ~l[r a  
    [I*! lbt  
    )(M7lq.e7  
    /u<nLj1  
    元件半径为20mm*20,mm,距离坐标原点200mm。 \K2*Q&>  
    gk0.zz([  
    光源创建: $rB3m~c|  
    3Hi+Z}8  
    光源类型选择为任意平面,光源半角设定为15度。 -T@`hk`  
    T.e.{yO  
    yBpk$  
    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。 \;5\9B"i  
    s54nF\3V  
    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 +|cI:|H>  
    $m$;v<PSe  
    XKOUQc4!R  
    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。 Z3KO90O!8  
    ,U,By~s  
    创建分析面: :fcM:w&  
    .1 )RW5|c  
    %V!iQzL1  
    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。 x+5k <Xi}  
    gO?44^hMe  
    NR%Y+8^M  
    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。 }Rvm &?~O  
    H;ZHqcUX  
    FRED在探测器上穿过多个像素点迭代来创建热图 /hWd/H]  
    < E|s\u  
    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。 |iYg >  
    将如下的代码放置在树形文件夹 Embedded Scripts, +]xFoH  
    0Wvq>R.(]7  
    Ue:z1p;g  
    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。 >B -q@D  
    JNI>VP[c  
    绿色字体为说明文字, rM}0%J'  
    +YY8h>hj  
    '#Language "WWB-COM"  cc=gCE  
    'script for calculating thermal image map UM%o\BiO  
    'edited rnp 4 november 2005 FwAKP>6*  
    \kIMDg3}  
    'declarations Et2JxbD  
    Dim op As T_OPERATION CBT>"sYE1  
    Dim trm As T_TRIMVOLUME ^ZeJ[t&!#  
    Dim irrad(32,32) As Double 'make consistent with sampling 9v )%dO.  
    Dim temp As Double 0BPMmk  
    Dim emiss As Double 7v}x?I  
    Dim fname As String, fullfilepath As String Wl"0m1G  
    D87|q4  
    'Option Explicit yTM3^R(  
    F!!N9VIC  
    Sub Main  NW9n  
        'USER INPUTS 7k%T<;V  
        nx = 31 sd re#@n}  
        ny = 31 'XOX@UH d  
        numRays = 1000 M(q'%XL^  
        minWave = 7    'microns ^n.WZUk  
        maxWave = 11   'microns b4 #R!  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 8y';\(;  
        fname = "teapotimage.dat" `b5 @}',  
    A1Y7;-D  
        Print "" 34|a\b}  
        Print "THERMAL IMAGE CALCULATION" ,8G{]X)  
    hjx)D  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 Btt]R  
    V}w;Y?] J  
        Print "found detector array at node " & detnode !/{+WHxIr|  
    x<i}_@Sn_+  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 t%1^Li  
    WP **a Bp  
        Print "found differential detector area at node " & srcnode zzGYiF ?  
    4pU>x$3$  
        GetTrimVolume detnode, trm R\Z: n*  
        detx = trm.xSemiApe )u ?' ;  
        dety = trm.ySemiApe Z(0@1l`Z-`  
        area = 4 * detx * dety nxm$}!Df  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety '(&%O8Yi  
        Print "sampling is " & nx & " by " & ny 6 &U+6gb  
    [&S}dQ"  
        'reset differential detector area dimensions to be consistent with sampling U!w1AY|  
        pixelx = 2 * detx / nx "O>n@Q|  
        pixely = 2 * dety / ny H&}ipaDO  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False p4u5mM  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 ,38Eq`5&W  
    n_D8JF  
        'reset the source power N6oq90G  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) G28O%jD?  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" DrW#v-d  
    Q-TV*FD.  
        'zero out irradiance array h( QYxI,|  
        For i = 0 To ny - 1 }1 vT)  
            For j = 0 To nx - 1 ewsKH\#  
                irrad(i,j) = 0.0 bEuaOBc  
            Next j >"3>s%  
        Next i *DI)?  
    \g)Xt?w0Wo  
        'main loop !7B\Xl'S  
        EnableTextPrinting( False ) ?|;yVew  
    "v*8_El  
        ypos =  dety + pixely / 2 _+f+`]iM  
        For i = 0 To ny - 1 =;~I_)Pg1  
            xpos = -detx - pixelx / 2 J<n+\F-s  
            ypos = ypos - pixely "R #k~R  
    JMBK{JK>  
            EnableTextPrinting( True ) pj|pcv^  
            Print i s0UFym 8  
            EnableTextPrinting( False ) rPzQ8<  
    ~89P[$6  
    .] 4W!])9  
            For j = 0 To nx - 1 {2'm^0Kl  
    XdEPbD-  
                xpos = xpos + pixelx 3M*Bwt;F_  
    Si}HX!s  
                'shift source <g8K})P  
                LockOperationUpdates srcnode, True !v#xb3"/  
                GetOperation srcnode, 1, op [(LV  
                op.val1 = xpos .~lKBkS`!  
                op.val2 = ypos I XA>`D  
                SetOperation srcnode, 1, op `RQ#.   
                LockOperationUpdates srcnode, False Nw J:!  
    DdV'c@rq+  
    raytrace ,0$)yZ3*3,  
                DeleteRays l":c  
                CreateSource srcnode 8Q`WB0E<|  
                TraceExisting 'draw ]J1S#Q5'  
    2R-A@UE2  
                'radiometry \~rlgxd  
                For k = 0 To GetEntityCount()-1 dm rps+L  
                    If IsSurface( k ) Then r WtZj}A  
                        temp = AuxDataGetData( k, "temperature" ) $*[{J+t_  
                        emiss = AuxDataGetData( k, "emissivity" ) CCijf]+  
                        If ( temp <> 0 And emiss <> 0 ) Then Sywu=b  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) K2_Qu't0$  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) .o{0+fC#  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi hi =XYC,  
                        End If 4tA_YIv  
    ^[:9fs  
                    End If EER`?Sa(  
    ?q2j3e[>  
                Next k p(SRjQt  
    c2l_$p  
            Next j H2gj=krK  
    +y+"Fyl  
        Next i I 1d0iU  
        EnableTextPrinting( True ) Upl6:xYrG  
    k?nQ?B W  
        'write out file JF9yVE-  
        fullfilepath = CurDir() & "\" & fname j '%4{n  
        Open fullfilepath For Output As #1 C=Fzu&N}  
        Print #1, "GRID " & nx & " " & ny >>dm }X  
        Print #1, "1e+308" #PvB/3  
        Print #1, pixelx & " " & pixely Huw\&E  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 2U kK0ls  
    :S@1  
        maxRow = nx - 1 vQVK$n`  
        maxCol = ny - 1 `i~ Y Fr  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) l|`9:H  
                row = "" XK(`mEi  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) f67NWFX  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string 1B>Vt*=  
            Next colNum                     ' end loop over columns <<A`aU^fX  
    ^(}585b  
                Print #1, row <3PL@orO  
    EUYCcL'G  
        Next rowNum                         ' end loop over rows %b.UPS@I  
        Close #1 Gnm4gF!BI  
    WnFG{S{s  
        Print "File written: " & fullfilepath ChryJRuwv5  
        Print "All done!!" 31+;]W=  
    End Sub }G46g#_6d>  
    v <\A%  
    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: ?eV(1 Fr@  
    ^62|d  
    +Z2MIC|Ud  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 < |O^>s;  
      
    DH DZ_t:  
    ;32#t[i b  
    打开后,选择二维平面图: #BK9 k>i  
    4Q=ftY<  
     
    分享到