切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1510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
    6421
    光币
    26250
    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。 {Ee[rAVGp  
    N5m+r.<;  
    成像示意图
    oY;=$8y<q  
    首先我们建立十字元件命名为Target 67,@*cK3?J  
    ZP*(ZU@j=Z  
    创建方法: ^R;Qa#=2  
    +2&+Gh.h  
    面1 : Dx:2/"v  
    面型:plane Wbra*LNU  
    材料:Air ~m0l_:SF  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box `)Z+]5:  
    b&iJui"7k  
    7R4xJ H  
    辅助数据: .|d2s  
    首先在第一行输入temperature :300K, $)(K7> P  
    emissivity:0.1; XHX$Ur9  
    T1Gy_ G/  
    j)A$%xUo  
    面2 : F@C^nX9  
    面型:plane 4|yZA*Q^  
    材料:Air (j*1sk  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box ccCe@1RI  
    k2 axGq  
    335\0~;3  
    位置坐标:绕Z轴旋转90度, Xj;\ROBH-  
    a d,0*(</  
    }iu(-{Z  
    辅助数据: !}[cY76_  
    B%~D`[~?  
    首先在第一行输入temperature :300K,emissivity: 0.1; aC9PlKI  
    !X 8<;e}2  
    d|~A>YZ  
    Target 元件距离坐标原点-161mm; +|SvJ  
    Hf^Tok^6@]  
    LEM^8G]O  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 utJz e  
    fD>0  
    h3z=tu['  
    探测器参数设定: >mWu+Nn:  
    ,vN0Jpf}\8  
    在菜单栏中选择Create/Element Primitive /plane jT6zpi~]E  
    slV7,4S&!  
    {1jywb }  
    q^.\8zFf  
    ZJ|@^^GcL  
    -4}I02  
    元件半径为20mm*20,mm,距离坐标原点200mm。 Z T5p  
    xUG:x4Gz+  
    光源创建: TAXl73j_CY  
    #_zd`s3k  
    光源类型选择为任意平面,光源半角设定为15度。 JW`Kh*,~<  
    I,0]> kx  
    Aj22t   
    我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 IdvBQ [Gj  
    >Za66<:  
    我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线 Rlq6I?S+  
    E\%'/3o  
    f%1Dn}6  
    功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 c= -2c&=&  
    H=7z d|W  
    创建分析面: _`Abz2s  
    0 CJ4]mYl  
    iN}BMd.U  
    到这里元件参数设定完成,现在我们设定元件的光学属性,在前面我们分别对第一和第二面设定的温度和发射系数,散射属性我们设定为黑朗伯,4%的散射。并分别赋予到面一和面二。 9hG+?   
    ]:Q7Gys  
    O>![IH(L  
    到此,所有的光学结构和属性设定完成,通过光线追迹我们可以查看光线是否可以穿过元件。 CwV1~@{-  
    qM$~5uu  
    FRED在探测器上穿过多个像素点迭代来创建热图 ;[_w&"[6a  
    kS>'6xXH  
    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。 yk5T"# '+  
    将如下的代码放置在树形文件夹 Embedded Scripts, p2=Sbb  
    ,8F?v~C  
     xYMNyj~  
    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。 mndUQN_Gb  
    kt";Jx  
    绿色字体为说明文字, l7]$Wc[  
    AR}M*sSh  
    '#Language "WWB-COM" h=3156M  
    'script for calculating thermal image map x+O}RD*G  
    'edited rnp 4 november 2005 lRn6Zh  
    'z#{'`$a  
    'declarations -9S.G  
    Dim op As T_OPERATION n9zS'VU  
    Dim trm As T_TRIMVOLUME VesO/xG<  
    Dim irrad(32,32) As Double 'make consistent with sampling }G8RJxy  
    Dim temp As Double GXEOgf#i  
    Dim emiss As Double #"M 'Cs  
    Dim fname As String, fullfilepath As String |U_48  
    ?-FSDNQ  
    'Option Explicit T#lySev  
    ifu "e_^  
    Sub Main F:/R'0  
        'USER INPUTS g~L1e5C]z  
        nx = 31 MwxfTH"wi  
        ny = 31 ;+-$=l3[a  
        numRays = 1000 dt"[5;_P`  
        minWave = 7    'microns ];P^q`n=.  
        maxWave = 11   'microns cJ&e^$:Er  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 b8 J\Lm|J  
        fname = "teapotimage.dat" hfY Ieb#91  
    XR^VRn6O  
        Print "" /$hfd?L  
        Print "THERMAL IMAGE CALCULATION" %J `;  
    F<?e79},`  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 N(?yOB4gt  
    'JEZ;9}  
        Print "found detector array at node " & detnode ;G.m;5A  
    a9GOY+;bf  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 ,q#^ _/?  
    M* W=v  
        Print "found differential detector area at node " & srcnode x8T5aS  
    SaEe7eHd  
        GetTrimVolume detnode, trm |}*k|  
        detx = trm.xSemiApe do{#y*B/g!  
        dety = trm.ySemiApe k@5,6s:  
        area = 4 * detx * dety DYH-5yX7  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety pBt/vSad  
        Print "sampling is " & nx & " by " & ny wLD/#Hfi7  
    $ 8w eh3p  
        'reset differential detector area dimensions to be consistent with sampling oKTIoTb  
        pixelx = 2 * detx / nx w\Q3h`.  
        pixely = 2 * dety / ny DR9M8E  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False 3V`K^X3  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 9AJ!7J#v"  
    \%NhggS*  
        'reset the source power w\;=3C`  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) /U1GxX:P,  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" (0W%Y Z!&  
    ^h^2='p  
        'zero out irradiance array  ew4IAF  
        For i = 0 To ny - 1 _]tR1T5e  
            For j = 0 To nx - 1 ,ewg3mYHC&  
                irrad(i,j) = 0.0 *|Re,cY  
            Next j kTex>1W;  
        Next i <uL?7P  
    v?<x"XKR  
        'main loop m7kDxs(KO  
        EnableTextPrinting( False ) 5v~Y>  
    rK~362|mo  
        ypos =  dety + pixely / 2 AnPm5i.  
        For i = 0 To ny - 1 5vY h~|  
            xpos = -detx - pixelx / 2 KLq u[{y.'  
            ypos = ypos - pixely a-Cp"pKlVY  
    e=Kv[R'(M  
            EnableTextPrinting( True ) D +)6#i Y  
            Print i SBjtg@:G0n  
            EnableTextPrinting( False ) ?9!tMRb  
    5G){7]P+r"  
    9;Wz;p  
            For j = 0 To nx - 1 Ph]e\  
    Njq#@*>[p  
                xpos = xpos + pixelx Xk]5*C]6<  
    wXZ.D}d  
                'shift source GQ|kcY=  
                LockOperationUpdates srcnode, True ;y6Jo  
                GetOperation srcnode, 1, op A i9*w?C  
                op.val1 = xpos I2j;9Qcz  
                op.val2 = ypos 2t[c^J  
                SetOperation srcnode, 1, op =]xNpX)  
                LockOperationUpdates srcnode, False 7L;yN..0  
    I6y&6g  
    raytrace 9z'</tJ`  
                DeleteRays NFLmM  
                CreateSource srcnode < q; ]  
                TraceExisting 'draw _gC<%6#V`r  
    {yt]7^  
                'radiometry r.i.w0B(  
                For k = 0 To GetEntityCount()-1 w,3`Xq@  
                    If IsSurface( k ) Then (P`{0^O"}  
                        temp = AuxDataGetData( k, "temperature" ) e,~c~Db* Q  
                        emiss = AuxDataGetData( k, "emissivity" ) y13=y}dyDH  
                        If ( temp <> 0 And emiss <> 0 ) Then m3_e]v3{o  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) ;S`Nq%,  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) A$XjzTR  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi ~g|e?$j  
                        End If U"m!f*a  
    jcq(=7j  
                    End If `t!iknOQ$  
    Mh+'f 93  
                Next k #Z$6> Xt  
    @z/]!n\~  
            Next j qZ\zsOnp  
    /=e[(5X|O  
        Next i F|P2\SPL  
        EnableTextPrinting( True ) y\0^c5}  
    {f^30Fw  
        'write out file [PX'Jer  
        fullfilepath = CurDir() & "\" & fname g+k6pi*  
        Open fullfilepath For Output As #1 XIjSwR kYJ  
        Print #1, "GRID " & nx & " " & ny p Hg8(ru|  
        Print #1, "1e+308" sM5 w~R>Y  
        Print #1, pixelx & " " & pixely ?sS'T7r v  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 M\v4{\2l0  
    Z:/S@ry  
        maxRow = nx - 1 '|XP}V0I  
        maxCol = ny - 1 ,s)~Y p?<  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) \o % ES  
                row = "" ^ _+ks/  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) ~:t2@z4p  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string LWQ BGiJj  
            Next colNum                     ' end loop over columns 0a'@J~v!  
    :X4\4B*~  
                Print #1, row }SN'*w@E  
    'h= >ej*  
        Next rowNum                         ' end loop over rows 8V|-BP5^  
        Close #1 ZcWl{e4  
    "5y^s!/  
        Print "File written: " & fullfilepath OT *W]f  
        Print "All done!!" w5*18L=O\  
    End Sub 6op\g].P  
    $`=?Nb@@#  
    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: &9ZIf#R  
     +;!w;t  
    .86..1  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 d.} rn"(z  
      
    D$mrnm4d  
    wlpbfO e/  
    打开后,选择二维平面图: C,<TAm  
    >u/yp[Ky  
     
    分享到