切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1883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
    6613
    光币
    27214
    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。 E^CiOTN  
    @PSLs *  
    成像示意图
    cUk*C  
    首先我们建立十字元件命名为Target ^3~e/PKM  
    @S3f:s0~D  
    创建方法: |FNCXlgZ  
    WNy3@+@GZ  
    面1 : Es4qPB`g.  
    面型:plane JAjku6  
    材料:Air iiC!|`k"  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box yVJ%+d:6  
    Q[u6|jRt  
    p]T"|!d  
    辅助数据: 1hmc,c  
    首先在第一行输入temperature :300K, P'$ `'J]j  
    emissivity:0.1; I 3$dVls}  
    `/IKdO*!S  
    n/Dp"4H%q  
    面2 : I4c!m_sr  
    面型:plane WO*9+\[v  
    材料:Air \}"m'(\c  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box 5iX! lAFJ  
    =o7}]k7  
    lB;FUck9  
    位置坐标:绕Z轴旋转90度, .*/Fucr  
    EqB)sK/3  
    L 3XB"A#  
    辅助数据: S: :>N.y  
    S4o$t -9l  
    首先在第一行输入temperature :300K,emissivity: 0.1; 1KE:[YQ1  
    m`A% p  
    n.}T1q|l  
    Target 元件距离坐标原点-161mm; p Pro }@@  
    aUopNmN  
    C NrII sJ  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 )A8v];.]3  
    DXR:1w[^  
    nv/[I,nw  
    探测器参数设定: ku&k'V  
    j?i#L}.I  
    在菜单栏中选择Create/Element Primitive /plane 83Ou9E!W  
    _e<o7Y@_  
    gFN 9jM  
    &#{dWObh  
    8p^B hd  
    n# 7Pr/*0  
    元件半径为20mm*20,mm,距离坐标原点200mm。 &, a3@i  
    7<\C ?`q"  
    光源创建: 0\QR!*'$  
    |V,<+BEi  
    光源类型选择为任意平面,光源半角设定为15度。 Ri7((x]H"  
    GZ#aj|  
    E,[xUz"  
    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。 ]+ Ixi o  
    2f:^S/.A  
    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 ~mz%E  
    5TKJWO.  
    Dt}rR[yJ  
    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。 E /<lGm:.  
    A<MtKb  
    创建分析面: Hf gz02Z$  
    tln37vq  
    Am4lEvb  
    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。 aoW6U{\  
    Fj p.T;  
    L@Nu/(pB=  
    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。 \3YO<E!t  
    T]9\VW4  
    FRED在探测器上穿过多个像素点迭代来创建热图 i b6^x:HGU  
    [1G^/K"  
    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。 u{H?4|'(  
    将如下的代码放置在树形文件夹 Embedded Scripts, |AZW9  
    d9^E.8p$  
    Q4]4@96Aj  
    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。 u'~;Y.@i'  
    2\D8.nQr  
    绿色字体为说明文字, E+95WF|4k"  
    uzr\oj+>  
    '#Language "WWB-COM" ?9+@+q  
    'script for calculating thermal image map I27,mS+]  
    'edited rnp 4 november 2005 ' I}: !Z  
    IZ,oM!Y  
    'declarations coE&24,0  
    Dim op As T_OPERATION v6(E3)J7  
    Dim trm As T_TRIMVOLUME S56]?M|[  
    Dim irrad(32,32) As Double 'make consistent with sampling 7*+]wEs  
    Dim temp As Double QP@<)`1t9  
    Dim emiss As Double jdA ]2]  
    Dim fname As String, fullfilepath As String =qVP]  9  
    Kb ;dKQ  
    'Option Explicit Dh| w^Q  
    22hSove.  
    Sub Main xb2?lL]  
        'USER INPUTS )$GIN/i  
        nx = 31 l: |D,q  
        ny = 31 N3BL3:@O  
        numRays = 1000 "8)z=n  
        minWave = 7    'microns I&yVx8aH}  
        maxWave = 11   'microns )=pD%$iq  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 E$s/]wnr[  
        fname = "teapotimage.dat" KxGX\   
    . RVVWqW  
        Print "" SuBeNA[&  
        Print "THERMAL IMAGE CALCULATION" + xv!$gJEj  
    w&h 2y4  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 ;Y9=!.Ak0y  
    Pn.bVV:  
        Print "found detector array at node " & detnode 6c4&VW  
    6aO2:|:yP  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 jR ~DToQ  
    uLeRZSC  
        Print "found differential detector area at node " & srcnode X?r48l??  
    gbBy/_b  
        GetTrimVolume detnode, trm j-@kW'K  
        detx = trm.xSemiApe kK>Xrj6  
        dety = trm.ySemiApe ]:]H:U]p  
        area = 4 * detx * dety )>\}~s  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety 4p`XG1Pt  
        Print "sampling is " & nx & " by " & ny .\Fss(Zn  
    9;t]Hp_+K  
        'reset differential detector area dimensions to be consistent with sampling 'vV$]/wBF  
        pixelx = 2 * detx / nx QWnndI_4p  
        pixely = 2 * dety / ny 83~ i:+;  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False }3 m0AQ;K  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 FjfN3#qlg  
    \BV 0zKd  
        'reset the source power @`"AHt  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) kTIYD o  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" |f( ~@Q:  
    NLd``=&  
        'zero out irradiance array bKVj[r8D~  
        For i = 0 To ny - 1 ^>&k]T`  
            For j = 0 To nx - 1 k8nLo.O  
                irrad(i,j) = 0.0 8ovM\9qT  
            Next j !cW[G/W8  
        Next i E|EgB33S  
    8OhDjWVJ  
        'main loop zoDZZ%{  
        EnableTextPrinting( False ) p0p4Xh1 e  
    z2c5m  
        ypos =  dety + pixely / 2 -4#2/GXNO  
        For i = 0 To ny - 1 b;mSQ4+  
            xpos = -detx - pixelx / 2 '(+<UpG_Q}  
            ypos = ypos - pixely ^4Am %yyT  
    m`? MV\^  
            EnableTextPrinting( True ) qOV[TP,  
            Print i .aOnGp  
            EnableTextPrinting( False ) Rf %HIAVE  
    HjNxqaljt  
    vEe NW  
            For j = 0 To nx - 1 E4.SF|=x  
    al9.}  
                xpos = xpos + pixelx xG&SX#[2  
    q6P wZ_  
                'shift source VObrlOkp  
                LockOperationUpdates srcnode, True XEM'}+d  
                GetOperation srcnode, 1, op ,3DXFV'uxb  
                op.val1 = xpos 9Mm!%Hu  
                op.val2 = ypos &F$:Q:* *  
                SetOperation srcnode, 1, op oS,I~}\kQ  
                LockOperationUpdates srcnode, False :VmHfOO  
    X26   
    raytrace " K*  
                DeleteRays 0o&MB Dp  
                CreateSource srcnode 7sNw  
                TraceExisting 'draw lG<hlYckv  
    N)8HR9[!  
                'radiometry %WFu<^jm  
                For k = 0 To GetEntityCount()-1 ,38Eq`5&W  
                    If IsSurface( k ) Then 'rP]Nw  
                        temp = AuxDataGetData( k, "temperature" ) |dE -^"_  
                        emiss = AuxDataGetData( k, "emissivity" ) VzS&`d.h  
                        If ( temp <> 0 And emiss <> 0 ) Then #1-xw~_  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) 5 x2Ay=s  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) ?wpB`  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi &:*q_$]Oz  
                        End If 3*S{;p  
    _1Z=q.sC  
                    End If i=FQGWAUu  
    L?&'xzt B  
                Next k XkKC!  
    g\oSG)  
            Next j +0z 7KO%^^  
    u8zbYd3  
        Next i =;~I_)Pg1  
        EnableTextPrinting( True ) J<n+\F-s  
    :q##fG 'm/  
        'write out file JMBK{JK>  
        fullfilepath = CurDir() & "\" & fname pj|pcv^  
        Open fullfilepath For Output As #1 s0UFym 8  
        Print #1, "GRID " & nx & " " & ny rPzQ8<  
        Print #1, "1e+308" :bU(S<%M  
        Print #1, pixelx & " " & pixely 6`01EIk  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 }peBR80tQ  
    F r?z"  
        maxRow = nx - 1 iGXI6`F"  
        maxCol = ny - 1 dpZ;l 9  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) TTNk r`  
                row = "" &(rWwOo6  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) r4_eTrC,  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string )n7l'}o?+  
            Next colNum                     ' end loop over columns u9-nt}hGYM  
    z;u> Yz+3  
                Print #1, row DLE8+NV8   
    [^H"FA[  
        Next rowNum                         ' end loop over rows F-Z%6O,2  
        Close #1 JYqSL)Ta*t  
    }WFf''Z-  
        Print "File written: " & fullfilepath sE(HZR1  
        Print "All done!!" 01a-{&   
    End Sub 3-s}6<0v1  
    m"tOe?  
    在输出报告中,我们会看到脚本对光源的孔径和功率做了修改,并最终经过31次迭代,将所有的热成像数据以dat的格式放置于: qf'm=efRyu  
    :y]Omp  
    JM$.O;y -  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 46jh-4) <  
      
    Weoj|0|t  
    -XoPia2  
    打开后,选择二维平面图: }SyxPXs  
    Die-@z|Y  
     
    分享到