切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1041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
    6107
    光币
    24688
    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。 pF=g||gS  
    nw'-`*'rj  
    成像示意图
    N1--~e  
    首先我们建立十字元件命名为Target iy5R5L 2  
    QBE@(2G}C  
    创建方法: Xwu.AVsr  
    6a}r( yP  
    面1 : nX%AeDBAT  
    面型:plane }3/~x  
    材料:Air MXAEX2xmme  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box Il~01|3+m  
    U_z2J(e~  
    EH9Hpo  
    辅助数据: )xl6,bq3  
    首先在第一行输入temperature :300K, nZvU 'k:  
    emissivity:0.1; 1-;?0en&0  
    zDBD.5R;  
    ]= x 1`j  
    面2 : Aa(<L$e!`  
    面型:plane |DG@ht  
    材料:Air 0~E 6QhV:  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box '?/&n8J\  
    Q2'eQ0W{ o  
    : 1)}Epo,  
    位置坐标:绕Z轴旋转90度, M[Y4_$k<-  
    M?:\9DDd  
    =d20Xa  
    辅助数据: 6n w&$I  
    Etnb3<^[t  
    首先在第一行输入temperature :300K,emissivity: 0.1; M23& <}Q8  
    N7.  @FK  
    eO4)|tW  
    Target 元件距离坐标原点-161mm; WVL#s?=g  
    Q)6va}2ai  
    P\B3 y+)  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 6mG3fMih.  
    I"Q<n[g0'  
    N=ifIVc  
    探测器参数设定: m4**>!I  
    LcUlc)YH5  
    在菜单栏中选择Create/Element Primitive /plane {OxWcK\2@h  
    23E 0~O  
    hLA;Bl  
    5Hle-FDn9  
    T^)plWw  
    =P_fv  
    元件半径为20mm*20,mm,距离坐标原点200mm。 9/;{>RL=  
    T Oy7?;|=  
    光源创建: rF8 hr  
    BjD&> gO)  
    光源类型选择为任意平面,光源半角设定为15度。 /?3:X *  
    (|0b7 |'T  
    Ow3a0cF[9  
    我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 .Vh*Z<9S4  
    KM5 JZZP  
    我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线 b>=7B6 Aw  
    u5E/m  
    M.k|bh8  
    功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 6lU|mJ`M  
    a!u3 HS-i  
    创建分析面: A+2oh3  
    Qp69Sk@H{  
    Q&wYc{TUbm  
    到这里元件参数设定完成,现在我们设定元件的光学属性,在前面我们分别对第一和第二面设定的温度和发射系数,散射属性我们设定为黑朗伯,4%的散射。并分别赋予到面一和面二。 #<}kISV0  
    N9*UMVU  
    %c0z)R~  
    到此,所有的光学结构和属性设定完成,通过光线追迹我们可以查看光线是否可以穿过元件。 4<yK7x  
    @W)/\AZ3  
    FRED在探测器上穿过多个像素点迭代来创建热图  ~^7  
    *R!]47Y d  
    FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 9Z9l:}bO  
    将如下的代码放置在树形文件夹 Embedded Scripts, Ld~4nc$H8  
    yM17H\=  
    Qdm(q:w  
    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。 S-P{/;c@  
    YAMfP8S  
    绿色字体为说明文字, l'2H 4W_+  
    R\ q):,  
    '#Language "WWB-COM" !&0a<~ Wi  
    'script for calculating thermal image map ^6&_| f  
    'edited rnp 4 november 2005 W^|J/Y48  
    ReqE?CeV  
    'declarations %(NN *o9"q  
    Dim op As T_OPERATION m9b(3  
    Dim trm As T_TRIMVOLUME i0i`k^bA  
    Dim irrad(32,32) As Double 'make consistent with sampling O 'Am RJ  
    Dim temp As Double %xh?!s|G(  
    Dim emiss As Double #-dK0<:  
    Dim fname As String, fullfilepath As String QB9A-U <J  
    kraVL%72  
    'Option Explicit |Ib.)  
    ,N;v~D$Y  
    Sub Main U_}hfLILi  
        'USER INPUTS -PXoMZx%  
        nx = 31 5])8qb/F  
        ny = 31 ze$Y=<S  
        numRays = 1000  mc~`  
        minWave = 7    'microns "$Y(NFb  
        maxWave = 11   'microns q@w"yz>  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 J2=*-O:  
        fname = "teapotimage.dat" ( w5f(4  
    -Fa98nV.WB  
        Print "" ,-!2 5G  
        Print "THERMAL IMAGE CALCULATION" 1zR/HT  
    YkVRl [  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 ofl'G]/$+  
    @%%bRY  
        Print "found detector array at node " & detnode K~$35c3M  
    LAos0bc)w\  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 cPm~` Zd  
    0ovZ&l  
        Print "found differential detector area at node " & srcnode $oc9 |Q 7  
    M!-q}5';  
        GetTrimVolume detnode, trm .2/,XwIr  
        detx = trm.xSemiApe WySNL#>a  
        dety = trm.ySemiApe 6g8M7<og9R  
        area = 4 * detx * dety `{%-*f^  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety 3 ^pYC K%  
        Print "sampling is " & nx & " by " & ny (A2U~j?Ry}  
    6G$/NW=L  
        'reset differential detector area dimensions to be consistent with sampling d~3GV(M  
        pixelx = 2 * detx / nx wJ/ ~q)  
        pixely = 2 * dety / ny <TL])@da  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False d`UF0T  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 8KZ$ F>T]>  
    y>%W;r)  
        'reset the source power ]u~Os<   
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) 0}6QO  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" .:T9pplq  
    R2SBhs,+R  
        'zero out irradiance array Rnz8 f}  
        For i = 0 To ny - 1 hl*MUD,  
            For j = 0 To nx - 1 (2cGHYU3N<  
                irrad(i,j) = 0.0 f>p; siR)  
            Next j {a[&#Uv  
        Next i icU"Vyu  
    Q Xsfp  
        'main loop ys/`{:w8p  
        EnableTextPrinting( False )  )Kxs@F  
    RFhU#  
        ypos =  dety + pixely / 2 ;B*L1'FF%t  
        For i = 0 To ny - 1 \f6lT3"VN  
            xpos = -detx - pixelx / 2 <\+Po<)3j  
            ypos = ypos - pixely 3e#x)H/dr  
    zI1(F67d`  
            EnableTextPrinting( True ) /7.wQeL9  
            Print i sYl&Q.\q  
            EnableTextPrinting( False )  3&O% &  
    eB)UXOu1  
    q$ bHO  
            For j = 0 To nx - 1 :O5Tr03z  
    [5x+aW%ql  
                xpos = xpos + pixelx rve7YS'  
    o]dK^[/*  
                'shift source WW)_Wh  
                LockOperationUpdates srcnode, True -Mr{+pf  
                GetOperation srcnode, 1, op b(g_.1[  
                op.val1 = xpos yjeqv-7  
                op.val2 = ypos B 9%yd*SJ  
                SetOperation srcnode, 1, op ]kyle3#-~  
                LockOperationUpdates srcnode, False 9NJ=~Ub-  
    GjG{qR  
    raytrace 0 =3FO}[u  
                DeleteRays UDhwnGTq(l  
                CreateSource srcnode $0S.@wUG  
                TraceExisting 'draw S~]8K8"sT  
    /%2:+w  
                'radiometry 9OE_?R0c!  
                For k = 0 To GetEntityCount()-1 E!:.G+SEl  
                    If IsSurface( k ) Then BnY\FQ)K  
                        temp = AuxDataGetData( k, "temperature" ) dY/|/eOt<K  
                        emiss = AuxDataGetData( k, "emissivity" ) .%-6&%1  
                        If ( temp <> 0 And emiss <> 0 ) Then <|mE9u  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) de3yP,  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) 8Sd?b5|G~  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi AT2NC6{M  
                        End If s^{{@O.  
    gt].rwo"  
                    End If ]L5Z=.z&  
    ^(E"3 c  
                Next k p{\qSPK  
    Sn{aHH  
            Next j l4R<`b\Jt  
    GQEI f$  
        Next i o3kt0NuF,  
        EnableTextPrinting( True ) C*Y :w  
    %[+a[/  
        'write out file [| c@Yw  
        fullfilepath = CurDir() & "\" & fname -oaG|  
        Open fullfilepath For Output As #1 d()zW7}W  
        Print #1, "GRID " & nx & " " & ny 8`R +y  
        Print #1, "1e+308" '<*CD_2t-  
        Print #1, pixelx & " " & pixely -Z[R S{#+T  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 iA1;k*) q  
    //`cwnjp  
        maxRow = nx - 1 +=,4@I%  
        maxCol = ny - 1 %_%f# S  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) J?|K#<%  
                row = "" wfU&{7yt  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) 2l\D~ y  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string YU ]G5\UU  
            Next colNum                     ' end loop over columns ,6%hu|Y*  
    gKm@B{rC  
                Print #1, row  YiY&; )w  
    mTI\,x%<OC  
        Next rowNum                         ' end loop over rows YokZar2a0  
        Close #1 ]ft~OqLg!  
    <MWXew7b  
        Print "File written: " & fullfilepath O=!)})YG  
        Print "All done!!" =0!\F~  
    End Sub 3& fIO  
    {m*V/tX  
    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:  01UR  
    Npf7p  
    tehI!->l  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 D~i@. k  
      
    $jUS[.S_|I  
    ~T p8>bmSR  
    打开后,选择二维平面图: qD=m{O8%_  
    6|"!sW`%N  
     
    分享到