切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1421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。 o&1ewE(O]  
    9@ 6y(#s  
    成像示意图
    n4+l, ~  
    首先我们建立十字元件命名为Target jEsP: H(0^  
    Y@N}XH<4R  
    创建方法: ^#2w::Ds}!  
    ahA21W` k  
    面1 : 4mJ4)  
    面型:plane &a%|L=FY  
    材料:Air $*^Ms>Pa_  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box YYHtd,0\+  
    4df)?/  
    3'6%P_S  
    辅助数据: 2J =K\ L  
    首先在第一行输入temperature :300K, u?Jw)`  
    emissivity:0.1; AzVON#rj  
    g4(B=G\j  
    |GtTz&  
    面2 : ~isrE;N1|  
    面型:plane twU^ewO&  
    材料:Air r k;k:<c  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box D ::),,  
    Juj"cjob  
    `;4P?!WG  
    位置坐标:绕Z轴旋转90度, abkl)X>k  
    e.jrX;;$!&  
    *Hy-D</w%  
    辅助数据: u HqPb8  
    cq+|fg~Yy  
    首先在第一行输入temperature :300K,emissivity: 0.1; %Kx:'m%U  
    | ?3\xw  
    xtYX}u  
    Target 元件距离坐标原点-161mm; S\K;h/;V  
    m8;; O  
    -hw^3Af  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 MW8GM}Ho[  
    9 o6ig>C  
    7{=/rbZT?  
    探测器参数设定: T1jAY^^I  
    g-"@%ps  
    在菜单栏中选择Create/Element Primitive /plane L\}o(P(  
    Z`<S_PPz  
    Y%y=  
    Ac}+U q  
    1@sy:{ d`  
    Y3+DTR0|'  
    元件半径为20mm*20,mm,距离坐标原点200mm。 =mxG[zDtQ  
    u8L%R[#o  
    光源创建: TZ{';oU  
    e/JbRbZX  
    光源类型选择为任意平面,光源半角设定为15度。 B-PN +P2  
    G vMhgG=D  
    =B@+[b0Z  
    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。 V/"UDof  
    68JYA?  
    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 rpH ,c[D  
    2%UzCK  
    "vI:B}  
    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。 O_}R~p  
     |`[0U  
    创建分析面: #'[4k:  
    5'wWj}0!%  
    chk1tFV  
    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。 &SuWmtq  
    F,+nj?i!  
    (~ro_WC/I  
    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。 wb~B Y  
    ? cU9~=  
    FRED在探测器上穿过多个像素点迭代来创建热图  @v &hr  
    K}7E;O5m"  
    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。 l#u$w&  
    将如下的代码放置在树形文件夹 Embedded Scripts, F!.Z@y P  
    Pj(Dl C7G,  
    vYb.Ub+  
    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。 a!rU+hiC  
    `&y Qtj# '  
    绿色字体为说明文字, K",YAfJa  
    "IQ' (^-P  
    '#Language "WWB-COM" UW%zR5q  
    'script for calculating thermal image map hZ@frbuowk  
    'edited rnp 4 november 2005 Aiyx!Q6vT  
    r ,I';vm<`  
    'declarations E;m]RtvH  
    Dim op As T_OPERATION &[71~.Od  
    Dim trm As T_TRIMVOLUME Ok63 w7  
    Dim irrad(32,32) As Double 'make consistent with sampling -yyim;Nj  
    Dim temp As Double ,F}\njL  
    Dim emiss As Double ZYRZ$87jZ  
    Dim fname As String, fullfilepath As String ZcJa:  
     ;;>hWAS  
    'Option Explicit 4z6i{n-k  
    n!Hj4~T0  
    Sub Main )B"k;dLm  
        'USER INPUTS Z[9) hGh  
        nx = 31 2S%[YR>>  
        ny = 31 s'$5]9$S  
        numRays = 1000 :c75*h`  
        minWave = 7    'microns mQL8ec_c  
        maxWave = 11   'microns S7oPdzcU-  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 _{Z!$q6,  
        fname = "teapotimage.dat" Y=G9|7*lO  
    \e)>]C}h  
        Print "" 1f}YKT  
        Print "THERMAL IMAGE CALCULATION" @6["A'h  
    >qE f991SZ  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 .,({&L  
    H){}28dX  
        Print "found detector array at node " & detnode RBOb/.$  
    t)qu@m?FZ)  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 vbA<=V*P  
    ws/e~ T<c  
        Print "found differential detector area at node " & srcnode xE>jlr?  
    "Yp:{e  
        GetTrimVolume detnode, trm TA4>12C6  
        detx = trm.xSemiApe :zA/~/Wo  
        dety = trm.ySemiApe 2uSXC*Phz  
        area = 4 * detx * dety qb$&BZj]|  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety "aL.`^.  
        Print "sampling is " & nx & " by " & ny [|qV*3 |?  
    1`sLbPW  
        'reset differential detector area dimensions to be consistent with sampling 90"&KDh  
        pixelx = 2 * detx / nx }>93X0%r  
        pixely = 2 * dety / ny bm>N~DC  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False K UD.hK.  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 7!qO*r  
    ^uiQZ%;  
        'reset the source power c/6  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) isBtJ7\Sc  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" 1  b&<De  
    |lDxk[  
        'zero out irradiance array \=1$$EDS9  
        For i = 0 To ny - 1 F>F2Yql&W  
            For j = 0 To nx - 1 &u`]Zn   
                irrad(i,j) = 0.0 ?2(5 2?cJ  
            Next j PEr &|H2  
        Next i ~:krJ[=  
    u+7S/9q8  
        'main loop 8(zE^W,[8"  
        EnableTextPrinting( False ) 8l.bT|#O  
    G+~f  
        ypos =  dety + pixely / 2 mAM:Q*a'  
        For i = 0 To ny - 1 L*6R5i>  
            xpos = -detx - pixelx / 2 b)+;=o%  
            ypos = ypos - pixely )5[OG7/g  
    ?W 6 :$  
            EnableTextPrinting( True ) \:BixBU7  
            Print i F$sDmk#  
            EnableTextPrinting( False ) )Fsc0_  
    ^j!2I&h1  
    MvKr~  
            For j = 0 To nx - 1 Zxw cqN  
    i7XM7 +}  
                xpos = xpos + pixelx U-*`I?~=4  
    $2E&~W %  
                'shift source 1j*E/L  
                LockOperationUpdates srcnode, True C+L_f_6]  
                GetOperation srcnode, 1, op '" 4;;(  
                op.val1 = xpos eH_< <Xh!v  
                op.val2 = ypos 29HyeLB@  
                SetOperation srcnode, 1, op OZR{+YrB^  
                LockOperationUpdates srcnode, False ,W|cyQ  
    |yinVfZ0C  
    raytrace `N}aV Ns  
                DeleteRays m9=93W?   
                CreateSource srcnode Xaw ~Hh)  
                TraceExisting 'draw &J\<"3  
    p:;`X!  
                'radiometry [gDl<6a#4  
                For k = 0 To GetEntityCount()-1 %M*2j%6  
                    If IsSurface( k ) Then b%QcB[k[WB  
                        temp = AuxDataGetData( k, "temperature" ) Ya &\b 6  
                        emiss = AuxDataGetData( k, "emissivity" ) @~QI3)=s  
                        If ( temp <> 0 And emiss <> 0 ) Then bo-L|R&O  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) +-!2nk`"a  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) `F$lO2#k  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi ]]NTvr  
                        End If l4> c  
    m%cwhH_B  
                    End If S}P rgw/  
    hb<cynY  
                Next k FN/siw(?3  
    \ZtKaEXnx  
            Next j Jr=XVQ(F  
    c2u*<x  
        Next i $-p9cyk  
        EnableTextPrinting( True ) \4KV9wm  
    VfFbZds8f  
        'write out file 1+#E|YWJ  
        fullfilepath = CurDir() & "\" & fname B|"-Ed  
        Open fullfilepath For Output As #1 UP7?9\  
        Print #1, "GRID " & nx & " " & ny f~R+Q/Gtz`  
        Print #1, "1e+308"  20]p<  
        Print #1, pixelx & " " & pixely f@ILC=c<  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 YrsE 88QqI  
    qfX26<q  
        maxRow = nx - 1 *\Lr]6k  
        maxCol = ny - 1 &I:ZJuQ4  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) j[A:So  
                row = "" &~c`p[  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) iwy;9x  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string 81H9d6hqcD  
            Next colNum                     ' end loop over columns 2;K2|G7  
    @*roW{?!  
                Print #1, row L_tjclk0J  
    DKF` xuJP  
        Next rowNum                         ' end loop over rows Q-7L,2TL  
        Close #1 fDRG+/q(+  
    6rWb2b  
        Print "File written: " & fullfilepath 7&dK_x,a  
        Print "All done!!" vY7 @1_"  
    End Sub WXY-]ir.  
    uvAJJIae'  
    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: P;eXUF+jn  
    ?./%7v  
    sDY+J(Z  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 g4y& 6!g  
      
    l.P;85/+  
    S!n?b|_  
    打开后,选择二维平面图: {.?pl]Zl6  
    v o4U%  
     
    分享到