切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1259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
    6374
    光币
    26015
    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。 PVkN3J  
    3!oQmG_T  
    成像示意图
    :rs\ydDUF  
    首先我们建立十字元件命名为Target .dKRIFo  
    )D@n?qbG  
    创建方法: 4(0t GF  
    Va |9)m  
    面1 : xjhAAM  
    面型:plane %}ApO{  
    材料:Air ]20 "la5  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box =u3@ Dhw  
    hp z*jyh8  
    ox=7N{+`J  
    辅助数据: /jn3'q_,  
    首先在第一行输入temperature :300K, lKhh=Pc2  
    emissivity:0.1; ~j&:)a'^  
    \Af|$9boHz  
    %Rsf6rJ  
    面2 : $-9@/%Y  
    面型:plane -z 5k4Y  
    材料:Air z vylL M  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box Mm7n?kb6  
    c'#J{3d  
    X@AkA9'fq  
    位置坐标:绕Z轴旋转90度, eW*ae;-  
    ;{q) |GRF  
    )(!Z90@  
    辅助数据: .f<VmUca  
    .yfqS|(  
    首先在第一行输入temperature :300K,emissivity: 0.1; V =aoB Z  
    9H%xZ(`vN  
    6BN(^y#-X  
    Target 元件距离坐标原点-161mm; #M^Yh?~%w  
    |Sv#f2`  
    9PGR#!!F$  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 B{UoNm@  
    lvJ{=~u  
    ftU5 A@(T  
    探测器参数设定: %PdYv _5  
    r\ Yur  
    在菜单栏中选择Create/Element Primitive /plane f uN XY-;  
    $z,DcO.vz  
    Ru')X{]25  
     <IDzv'  
    v_h*:c  
    HeifFJn  
    元件半径为20mm*20,mm,距离坐标原点200mm。 k\<Ln w  
    ;,-Vapz  
    光源创建: J'c9577$  
    k Q(y^tW  
    光源类型选择为任意平面,光源半角设定为15度。 5_C#_=E  
    sfPN\^k2  
    Y <k,E  
    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。 :QL p`s  
    M*6@1.n  
    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 N_Ld,J%g  
    [=F |^KL  
    "s<l Lgi  
    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。 ,wo"(E!4e  
    +* {5ORq=  
    创建分析面: fO(S+}  
    T>%ny\?tHW  
    GiwA$^Hg\  
    到这里元件参数设定完成,现在我们设定元件的光学属性,在前面我们分别对第一和第二面设定的温度和发射系数,散射属性我们设定为黑朗伯,4%的散射。并分别赋予到面一和面二。 >D4Ez  
    SfL`JNi)  
    . \0=1P:  
    到此,所有的光学结构和属性设定完成,通过光线追迹我们可以查看光线是否可以穿过元件。 P}QbxkS 8  
    X3O$Sd(D  
    FRED在探测器上穿过多个像素点迭代来创建热图 SY)$2RC+}  
    pDq_nx9  
    FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 y+afUJT  
    将如下的代码放置在树形文件夹 Embedded Scripts, i O|,,;_  
    K.1yncS^  
    +M&S  
    打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 oz-I/g3go  
    O~'yP @&`  
    绿色字体为说明文字, ;O|63  
    Q b{5*>  
    '#Language "WWB-COM" )_K@?rWS  
    'script for calculating thermal image map K61os&K  
    'edited rnp 4 november 2005 %{abRBny  
    4H)" d  
    'declarations |bnjC$b*  
    Dim op As T_OPERATION -Ep6 .v  
    Dim trm As T_TRIMVOLUME \%Q rN+WQ  
    Dim irrad(32,32) As Double 'make consistent with sampling #zs\Z]3#  
    Dim temp As Double 4PM`hc  
    Dim emiss As Double G@!9)v]9  
    Dim fname As String, fullfilepath As String g^UWf<xp  
    #'h CohL  
    'Option Explicit r!,V_a4n  
    3*2pacHpE  
    Sub Main U/o}{,$A  
        'USER INPUTS s2=X>,kz?  
        nx = 31 nn%xN\~<  
        ny = 31 Qo *]l_UO;  
        numRays = 1000 !PIdw~YC  
        minWave = 7    'microns 53 05N!  
        maxWave = 11   'microns -V/i%_+Ze  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 toJ&$HrE  
        fname = "teapotimage.dat" KZfRiCZ  
    5K~6`  
        Print "" BmX Gk  
        Print "THERMAL IMAGE CALCULATION" L(8dK  
    \hN2w]e  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 t&]Mt 7  
    :q1r2&ne  
        Print "found detector array at node " & detnode CHI(\DXNs  
    0%+k>(@ R  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 ,m]q+7E  
    !;Nh7vG  
        Print "found differential detector area at node " & srcnode K*FAngIB  
    Ntiz-qW  
        GetTrimVolume detnode, trm G3?z.5 ,Q  
        detx = trm.xSemiApe c$fM6M }  
        dety = trm.ySemiApe -;"l 5oX  
        area = 4 * detx * dety =>*N W9c  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety L9oZ7o  
        Print "sampling is " & nx & " by " & ny $8r:&Iw  
    3k^jR1  
        'reset differential detector area dimensions to be consistent with sampling ?9TogW>W  
        pixelx = 2 * detx / nx  64fG,b  
        pixely = 2 * dety / ny -m/4\D  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False K^ \9R  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 sc60:IxgI  
    Dm#k-y  
        'reset the source power "QS7?=>*F  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) tO3 ;; %  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units"  U2$T}/@  
    '%N)(S`O7P  
        'zero out irradiance array d*L'`BBsp  
        For i = 0 To ny - 1 CI{x/ e^(  
            For j = 0 To nx - 1 yk2j&}M  
                irrad(i,j) = 0.0 :TI1tJS~*  
            Next j 8F1!9W7  
        Next i mM.&c5U  
    =w-H )  
        'main loop >qA&;M  
        EnableTextPrinting( False ) 'zK*?= ^jk  
    mGvP9E"&  
        ypos =  dety + pixely / 2 `l#g`~L  
        For i = 0 To ny - 1 (.o'1 '  
            xpos = -detx - pixelx / 2 7ow1=%Q  
            ypos = ypos - pixely +$5^+C\6A  
    {wI0 =U  
            EnableTextPrinting( True ) n} {cs  
            Print i l1WVt}  
            EnableTextPrinting( False ) {'!~j!1'j  
    v<1;1m  
    p~IvkW>ln)  
            For j = 0 To nx - 1 ^ a:F*<D  
    qv\yQ&pj  
                xpos = xpos + pixelx p<4':s;*  
    #SueT"F  
                'shift source ~_%[j8o&l  
                LockOperationUpdates srcnode, True u:ISwAp  
                GetOperation srcnode, 1, op ^iNR(cwgX  
                op.val1 = xpos 0P(}e[~Z  
                op.val2 = ypos rNc>1}DDS  
                SetOperation srcnode, 1, op 7[L C*nrr  
                LockOperationUpdates srcnode, False . {I7sUQ  
    n :P}K?lg  
    raytrace 2dfA}i>k  
                DeleteRays r DuG["  
                CreateSource srcnode STe;Sr&p  
                TraceExisting 'draw <FE O6YP  
    \X!!(Z;6A  
                'radiometry $`%.Y&A  
                For k = 0 To GetEntityCount()-1 'mF}+v^   
                    If IsSurface( k ) Then xpz Jt2S  
                        temp = AuxDataGetData( k, "temperature" ) ^^#A9AM  
                        emiss = AuxDataGetData( k, "emissivity" ) JFfx9%Fq  
                        If ( temp <> 0 And emiss <> 0 ) Then {`VQL6(i  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) !?{5ET,gtN  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) _EP}el  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi \XC1/LZQ  
                        End If lgl/| ^ Uw  
    I,D=ixK  
                    End If 8Ex0[ e  
    "TPMSx&Ei  
                Next k Z_%>yqDC  
    /-T%yuU  
            Next j P+[R0QS  
    U/>5C:  
        Next i 7DD ot_qb  
        EnableTextPrinting( True ) 945psG@|  
    JmkJ^-A 6  
        'write out file [{YV<kN  
        fullfilepath = CurDir() & "\" & fname 9E5B.qlw$l  
        Open fullfilepath For Output As #1 2bqwnRT}  
        Print #1, "GRID " & nx & " " & ny Ae1},2py  
        Print #1, "1e+308" (U)=t$=o  
        Print #1, pixelx & " " & pixely NJ.kT uk  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 3hkA`YSYt  
    V;$lgTs|'  
        maxRow = nx - 1 !T}`h'  
        maxCol = ny - 1 m9/a!|fBE  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) q_!3<.sf  
                row = "" 4_$f "6  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) 1*Z}M%  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string QeGU]WU{  
            Next colNum                     ' end loop over columns '?\Hm'8  
    b+kb7  
                Print #1, row Y#\e~>K  
    @uc%]V<:k  
        Next rowNum                         ' end loop over rows kns[b [!H  
        Close #1 Ab2VF;z :  
    *fE5Z;!}  
        Print "File written: " & fullfilepath N3,EF1%  
        Print "All done!!" /SyiJCx0  
    End Sub Xr@0RFdr[  
    kHJjdgV  
    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: Q,scjt[  
    kY|<1Ht  
    #N*~Q  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 'SC`->F4D  
      
    cB|](gWS~  
    W_?S^>?l/  
    打开后,选择二维平面图: \eN}V  
    /Z^+K  
     
    分享到