切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1574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
    6425
    光币
    26270
    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。 .*B@1q  
    NG8 F'=<  
    成像示意图
    Rn*@)5  
    首先我们建立十字元件命名为Target !u;gGgQF  
    DQ@M?~1hp  
    创建方法: mu2|%$C;$  
    M(1cf(<+  
    面1 : &2nICAN[  
    面型:plane >8|V[-H  
    材料:Air cB)tf S4)  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box M8R/a[ -A  
    \]0#jI/:  
    y&V%xE/  
    辅助数据: ^CK D[s  
    首先在第一行输入temperature :300K, @KRia{  
    emissivity:0.1; _*cKu>,O  
    rZ&li/Z  
    WfHa  
    面2 : LYr9a(  
    面型:plane yeam-8  
    材料:Air RivhEc1h%  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box L2c\i  
    F:sUGM,  
    m@']%X*(,  
    位置坐标:绕Z轴旋转90度, y;%\ w-.\  
    H<tU[U=G  
    H43d[@h  
    辅助数据: {e1sq^>|  
    7m%[$X`  
    首先在第一行输入temperature :300K,emissivity: 0.1; J!}\v=Rn  
    :`>tCYy;  
    FNs$k=* 8  
    Target 元件距离坐标原点-161mm; ktkS$  
    3 }3C*w+  
    uPC(|U%  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 5j v*C]z  
    Q!r&vQ/g  
    2St<m-&  
    探测器参数设定: KAi_+/]K_  
    @yj~5Gf(j  
    在菜单栏中选择Create/Element Primitive /plane gtIEpYN+  
    5LZs_%#  
    E.*gKfL  
    $3g M P+  
    "YAnGGx)LZ  
    %{Obh j;c  
    元件半径为20mm*20,mm,距离坐标原点200mm。 }=B~n0  
    ~~O4!|t  
    光源创建: h/2@4XKj  
    =:t<!dp  
    光源类型选择为任意平面,光源半角设定为15度。 fQ1Dp  
    W*?qOq {  
    <9\Lv]ng  
    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。 i(ZzE  
    z "z  
    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 omznSL  
    _pzYmQ  
    +_25E.>ml  
    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。 JDW/Mc1bh  
    ^/cqE[V~,  
    创建分析面: s IBP$9  
    a^\ F9^j  
    t 1~k+  
    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。 | O9b  
    \y6Y}Cv  
    aHb&+/HZ  
    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。 fqBz"l>5A  
    cm!|A?-<  
    FRED在探测器上穿过多个像素点迭代来创建热图 p&#ju*i6z  
    0:-z+`RHE  
    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。 Ov4=!o=  
    将如下的代码放置在树形文件夹 Embedded Scripts, Udf\;G@  
    !Pt4\  
    ~*J <lln  
    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。 K:% MhH-  
    9I`0`o"A  
    绿色字体为说明文字, mY[*Cj3WJ  
    &ld<fa(w+2  
    '#Language "WWB-COM" %_!0V*X*  
    'script for calculating thermal image map HR?bnkv|id  
    'edited rnp 4 november 2005 gI9nxy  
    ? * r  
    'declarations xFJT&=Af W  
    Dim op As T_OPERATION  !VXy67  
    Dim trm As T_TRIMVOLUME JG&E"j#q  
    Dim irrad(32,32) As Double 'make consistent with sampling kM@e_YtpY  
    Dim temp As Double .JTRFk{W  
    Dim emiss As Double bKsEXS  
    Dim fname As String, fullfilepath As String gPA8A>U)[  
    t=My=pG  
    'Option Explicit x>,wmk5)  
    +>AVxV=A#  
    Sub Main  Lsai8 B  
        'USER INPUTS VKfpk^rU  
        nx = 31 hN*v|LFf1  
        ny = 31 PW iuM=E  
        numRays = 1000 u~ VXe  
        minWave = 7    'microns *3OlWnZ?  
        maxWave = 11   'microns q2OF-.rE  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 eD3\>Y.z  
        fname = "teapotimage.dat" eu8a<  
    ^UhqV"[7k  
        Print "" ^CM@VmPp  
        Print "THERMAL IMAGE CALCULATION" B*E"yB\NV  
    uhnnjI  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 c6=XJvz  
    2yD ?f8P4  
        Print "found detector array at node " & detnode Z-pZyDz  
    1|s` z  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 +?*.Emzl@  
    TKbfZw  
        Print "found differential detector area at node " & srcnode __1Hx?f  
    T+t7/PwC;  
        GetTrimVolume detnode, trm L?P[{Ohh/  
        detx = trm.xSemiApe MtgY `p  
        dety = trm.ySemiApe :Ig9n :  
        area = 4 * detx * dety :cIPX%S  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety &~x|w6M]J  
        Print "sampling is " & nx & " by " & ny 7/fJQM  
    bD3d T>(+  
        'reset differential detector area dimensions to be consistent with sampling 44w "U%+  
        pixelx = 2 * detx / nx @3 +   
        pixely = 2 * dety / ny 9eE FX7  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False WX`wz>KK^  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 d_f*'M2Gv  
    <Wj /A/  
        'reset the source power T-lP=KF=  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) x_/l,4_  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" bE=[P}E  
    s&CK  
        'zero out irradiance array X+ybgB4(  
        For i = 0 To ny - 1 %F$ ]v  
            For j = 0 To nx - 1 Sj*W|n\gj  
                irrad(i,j) = 0.0 "4T36b  
            Next j F9(jx#J~t  
        Next i `K[r5;QFKf  
    |mdf u=  
        'main loop Oml /;p  
        EnableTextPrinting( False ) iAPGP -<6  
    mi5bk>o  
        ypos =  dety + pixely / 2 Jy[rA<x$  
        For i = 0 To ny - 1 &|Rww\oJ  
            xpos = -detx - pixelx / 2 .m%5Esx  
            ypos = ypos - pixely J-G)mvkv  
    G=CP17&h6  
            EnableTextPrinting( True ) bP|-GCKM8  
            Print i o/vD]Fs  
            EnableTextPrinting( False ) gdh|X[d  
    _j{)%%?r  
    _`laP5~  
            For j = 0 To nx - 1 /?|;f2tbV2  
    7s{['t  
                xpos = xpos + pixelx V' i@N  
    BvHI}=  
                'shift source y]!mN  
                LockOperationUpdates srcnode, True p]toDy-}  
                GetOperation srcnode, 1, op 2$2@?]|?  
                op.val1 = xpos zP@\rZ@4  
                op.val2 = ypos %x}Unk  
                SetOperation srcnode, 1, op *$JS}Pax  
                LockOperationUpdates srcnode, False 9I#a{%A:  
    Y[m*  
    raytrace ]C|xo.=?]  
                DeleteRays y.gNjc  
                CreateSource srcnode @kba^z  
                TraceExisting 'draw 0&Iu+hv  
    eSW}H_3  
                'radiometry })q8{Qj!  
                For k = 0 To GetEntityCount()-1 9`@}KnvB?  
                    If IsSurface( k ) Then &4M,)Q (  
                        temp = AuxDataGetData( k, "temperature" ) Iu;VFa  
                        emiss = AuxDataGetData( k, "emissivity" ) *Ct ^jU7  
                        If ( temp <> 0 And emiss <> 0 ) Then EU Oa8Z  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) MQy,[y7I  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) wLg@BSC.  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi SpEu>9g&  
                        End If Z^KWYe'w  
    [?]p I  
                    End If +<f+kh2L  
    9om}j  
                Next k ws,VO*4  
    Gq?>Bi;`  
            Next j ;H]]H!  
    [LbCG  
        Next i wc}4:~  
        EnableTextPrinting( True ) 1=~##/at  
    )Q|sW+AF  
        'write out file SuBUhzR  
        fullfilepath = CurDir() & "\" & fname nQfSQMg  
        Open fullfilepath For Output As #1 t-]~^s  
        Print #1, "GRID " & nx & " " & ny |4` ;G(ta  
        Print #1, "1e+308" A2`Xh#o  
        Print #1, pixelx & " " & pixely 3Z%jx#  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 f4|ir3oy  
    1ZWr@,\L  
        maxRow = nx - 1 }\W^$e-  
        maxCol = ny - 1 o'YK\L!p  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) Dd)L~`k{)  
                row = "" id1gK(F8H  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) =Zaw>p*H  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string T@r%~z  
            Next colNum                     ' end loop over columns 'W~6-c9y  
    @4]dv> Z  
                Print #1, row XIp>PcU^  
    E/>kvs%  
        Next rowNum                         ' end loop over rows uC 2{ Mmy  
        Close #1 [>:9 #n  
    TO] cZZ<  
        Print "File written: " & fullfilepath A_5M\iN\  
        Print "All done!!" "Y=4Y;5q  
    End Sub f!cYLU1e@  
    {9nH#yv  
    在输出报告中,我们会看到脚本对光源的孔径和功率做了修改,并最终经过31次迭代,将所有的热成像数据以dat的格式放置于: A$::|2~  
    (Lkcx06e  
    MQo/R,F }  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 m=^ihQ  
      
    14h0$7  
    *p^*>~i9)  
    打开后,选择二维平面图: 1@^*tffL:  
    T2 XLP  
     
    分享到