切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1404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。 zRwb"  
    J=I:T2bV&s  
    成像示意图
    ^)&Ly_xrU  
    首先我们建立十字元件命名为Target 3B@y &a#&  
    wYZT D*A2h  
    创建方法: $.H:8^W  
    3/X-Cr+d  
    面1 : *)limqe3"$  
    面型:plane G 1]"s@8(  
    材料:Air 2Y400  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box yiiyqL*E  
    sK+ (v  
    pv$mZi4i  
    辅助数据: b,nn&B5@{  
    首先在第一行输入temperature :300K, NF6X- ,c d  
    emissivity:0.1; Z+g1~\  
    8RVS)D''  
    =EQJqj1T  
    面2 : fJaubDxa  
    面型:plane /-h6`@[  
    材料:Air gfi AK%  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box *yJ[zXXjJ  
    y8G&Wg aCi  
    <lUOJV{&\  
    位置坐标:绕Z轴旋转90度, =WC-Sj{I  
    /QQ8.8=5  
    [+;qWfs B  
    辅助数据: ,Du@2w3Cq  
    {J (R  
    首先在第一行输入temperature :300K,emissivity: 0.1; / /'Tck  
    {9L5Q  
    yQ9ZhdQS  
    Target 元件距离坐标原点-161mm; rah,dVE]  
    !lAD q|$  
    sONBQ9  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 OA[&Za#w  
    Z1M>-[j)  
    $f#agq_  
    探测器参数设定: MU'@2c  
    Z,K7Ot0  
    在菜单栏中选择Create/Element Primitive /plane %?bcT[|3  
    bp#:UUO%S  
    `-_N@E1'>  
    baee?6  
    vv6?V#{  
    EeB ]X24  
    元件半径为20mm*20,mm,距离坐标原点200mm。 Ur^j$B}  
    2#3^skj  
    光源创建: 2jl)mL  
    <\" .L  
    光源类型选择为任意平面,光源半角设定为15度。 FXV`9uq}Z  
    6k"P&AD  
    ' _dzcN,z  
    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。 w1r$='*I  
    Rs*v m  
    我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线 UNDi_6Dy   
    LvJGvj  
    l?/Y  
    功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 lv]quloT  
    SHD^}?-|  
    创建分析面: *XbI#L%>  
    vfcb:x  
    1DE@N1l  
    到这里元件参数设定完成,现在我们设定元件的光学属性,在前面我们分别对第一和第二面设定的温度和发射系数,散射属性我们设定为黑朗伯,4%的散射。并分别赋予到面一和面二。 N L'R\R  
    `Gd$:qV  
    '7*=`q{  
    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。 Q$ri=uB;+  
    jTb-;4 N'  
    FRED在探测器上穿过多个像素点迭代来创建热图 &3Z?UhH  
    a{SBCy  
    FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 [BM*oEFPB*  
    将如下的代码放置在树形文件夹 Embedded Scripts, iWE)<h  
    ow6*Xr8eQ  
    y#v"GblM  
    打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 x0Yse:RE^  
    %+-C3\'  
    绿色字体为说明文字, Lq (ZcEKo  
    }CDk9Xk  
    '#Language "WWB-COM" hXn3,3f3oZ  
    'script for calculating thermal image map -"Q-H/qh  
    'edited rnp 4 november 2005 8i}< k$S  
    TZRcd~5$  
    'declarations iWLa>z|,  
    Dim op As T_OPERATION ^V3v{>D>  
    Dim trm As T_TRIMVOLUME }P9Ap3?  
    Dim irrad(32,32) As Double 'make consistent with sampling `zpbnxOL$T  
    Dim temp As Double ]"~51HQZ  
    Dim emiss As Double 8FkFM^\1L  
    Dim fname As String, fullfilepath As String @kFu*"  
    hWo=;#B*  
    'Option Explicit Z5(enTy-  
    >TjJA #  
    Sub Main B[5r|d'  
        'USER INPUTS ;AJTytE>%  
        nx = 31 %ZP+zh n}  
        ny = 31 /mM2M-  
        numRays = 1000 4~z?"  
        minWave = 7    'microns &<pKx!  
        maxWave = 11   'microns 3WY$WRv  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 aqU' T  
        fname = "teapotimage.dat" zsXoBD\h  
    v"^~&q0x  
        Print "" J;$N{"M  
        Print "THERMAL IMAGE CALCULATION" Q@@v1G\  
    1w(JEqY3h:  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 P u0uKE  
    }!>=|1 fY  
        Print "found detector array at node " & detnode l8h&|RY[  
    TBrGA E  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 8>WVodv  
    . lgPFr6X  
        Print "found differential detector area at node " & srcnode %wptZ"2M  
    VOTv?Vf  
        GetTrimVolume detnode, trm A"5z6A4WB  
        detx = trm.xSemiApe z*$q8Z&7rg  
        dety = trm.ySemiApe Q7X3X,  
        area = 4 * detx * dety SLfFqc+n0  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety E\nv~Y?SG  
        Print "sampling is " & nx & " by " & ny {nT^t Aha  
    \dQx+f&t  
        'reset differential detector area dimensions to be consistent with sampling &k7;DO  
        pixelx = 2 * detx / nx CSPKP#,B0[  
        pixely = 2 * dety / ny 6 15s5ZA  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False G rmzkNlN  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 xVL5'y1g B  
    '})0!g<Y  
        'reset the source power Nc Pgq?3p  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) [+m?G4[  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" G` fC/Le  
    l1U=f]  
        'zero out irradiance array D]a<4a 18  
        For i = 0 To ny - 1 z7M_1%DEx  
            For j = 0 To nx - 1 wkqX^i7ls  
                irrad(i,j) = 0.0 38DT2<qC  
            Next j f h#C' sn  
        Next i obrl#(\P  
    +ISz?~8  
        'main loop Io4(f  
        EnableTextPrinting( False ) m'\2:mDu0  
    $D v\ e  
        ypos =  dety + pixely / 2 r;L>.wl*I  
        For i = 0 To ny - 1 h_1T,f (  
            xpos = -detx - pixelx / 2 gBh;=vOD  
            ypos = ypos - pixely /&F,V+x  
    '0y9MXRT  
            EnableTextPrinting( True ) VvFC -r,=G  
            Print i 0;4t&v7  
            EnableTextPrinting( False ) #_Z$2L"U  
    r:&` $8$  
    o&AM2U/?  
            For j = 0 To nx - 1 8t@p @Td|  
    P0H6 mn*  
                xpos = xpos + pixelx <<=WY_m}  
    ydw)mT44K  
                'shift source ?pgG,=?  
                LockOperationUpdates srcnode, True ;S0Kh"A  
                GetOperation srcnode, 1, op [.RO'>2z  
                op.val1 = xpos 7\*FEjRM]  
                op.val2 = ypos P=3RLL<l  
                SetOperation srcnode, 1, op F:y[@Yn  
                LockOperationUpdates srcnode, False lrf v+  
    qd8n2f  
    raytrace &E xYXI  
                DeleteRays \#o2\!@`  
                CreateSource srcnode 9j W2  
                TraceExisting 'draw FnJ?C&xK  
    V $z} K  
                'radiometry {hln?'  
                For k = 0 To GetEntityCount()-1 p!k7C&]E  
                    If IsSurface( k ) Then lds- T  
                        temp = AuxDataGetData( k, "temperature" ) 54 >-  
                        emiss = AuxDataGetData( k, "emissivity" ) vad12WrG<  
                        If ( temp <> 0 And emiss <> 0 ) Then >.dWjb6t  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) \J+*  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) "4vy lHIo  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi s w39\urf  
                        End If J|'7_0OAx  
    "\0v,!@  
                    End If Ag F,aZU  
    atXS-bg*  
                Next k Y&/]O$<  
    CR6R?R3b  
            Next j )M__ t5L  
    ~ek$C  
        Next i ,+~rd4a  
        EnableTextPrinting( True ) +cD!1IT:  
    F(t=!k,4\  
        'write out file <dW]\h?)  
        fullfilepath = CurDir() & "\" & fname rvr-XGK36\  
        Open fullfilepath For Output As #1 (@iMLuewK  
        Print #1, "GRID " & nx & " " & ny Oft4- 4$E  
        Print #1, "1e+308" n_3O-X(  
        Print #1, pixelx & " " & pixely ]p_@@QTC  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 lFTF ,G  
    o.q/O)'V u  
        maxRow = nx - 1 :1Q!$  m  
        maxCol = ny - 1 YZ%Hu)  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) pv&y91  
                row = "" SM`w;?L:?  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) Ok n(pJ0  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string pZtu&R%GU  
            Next colNum                     ' end loop over columns LBF 1;zjK  
    rXA*NeA3v  
                Print #1, row /4xki_}  
    SR DXfkoI  
        Next rowNum                         ' end loop over rows r#xg#uoj  
        Close #1 6;|n]m\Vd  
    >@"Oe  
        Print "File written: " & fullfilepath irN6g#B?  
        Print "All done!!" Yv:55+e!|  
    End Sub bf9a 1<\  
    $V1;la!  
    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: QR1{ w'c  
    Ot]Ru,y->+  
    To?W?s  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 3>Y 6)  
      
    otk}y8  
    EY \H=@A  
    打开后,选择二维平面图: b, :QT~g=  
    <n(*Xak{a  
     
    分享到