切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1474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。 7 *HBb-  
    Q?W}]RW  
    成像示意图
    )9>E} SU/  
    首先我们建立十字元件命名为Target '>r"+X^W  
    yy|F6Pq3`  
    创建方法: ]}dAm S/  
    -j"2rIl4#  
    面1 : pJ]i)$M  
    面型:plane ;923^*\:F{  
    材料:Air =%oKYQ  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box 9$P*fx&m  
    X.!|#FWb+  
    XxE>KeP  
    辅助数据: O PVc T  
    首先在第一行输入temperature :300K, }K\m.+%=d  
    emissivity:0.1; i fbO<  
    ?TVR{e:  
    -pm^k-%v  
    面2 : 4f> s2I&pQ  
    面型:plane d/`Q,Vl  
    材料:Air S`GM#(t@_  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box I%31MU9  
    ~gvw6e*[  
    Qz/1^xy  
    位置坐标:绕Z轴旋转90度, %1VfTr5  
    -dsE9)&8DX  
    ZtqN8$[6n  
    辅助数据: >pn5nn1a  
    6)~J5Fb  
    首先在第一行输入temperature :300K,emissivity: 0.1; 9q !./)  
    4E DwZR>./  
    . 'rC'FT  
    Target 元件距离坐标原点-161mm; Gfn?1Kt{  
    4I^8f||b_  
    A&6qt  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 Vtr5<:eEx  
    }H<87zH  
    \@HsMV2+zN  
    探测器参数设定: wsLfp82  
    YX:[],FP  
    在菜单栏中选择Create/Element Primitive /plane LdM9k(  
    X6Hd%}*mN  
    Z6xM(*vg  
    /DBldL7yi  
    )w++cC4/5  
    BTu_$5F  
    元件半径为20mm*20,mm,距离坐标原点200mm。 3fWL}]{<a  
    jh&WL  
    光源创建: Zl+Ba   
    h^$ c  
    光源类型选择为任意平面,光源半角设定为15度。 Xm! ;  
    J#^oUq  
    jVtRn.qh  
    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。 B> LL *  
    }\Mmp+<  
    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 v}AVIdR  
    J< U,~ra\  
    / !*+9+h  
    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。 .[KXO0Ui6u  
    ZeyA bo  
    创建分析面: ;K9rE3  
    7xmif YC  
    5E!G  
    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。 =whYo?cE(  
    ;<=B I!  
    c _v;"QZ  
    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。 b];p/V# <  
    b:w {7  
    FRED在探测器上穿过多个像素点迭代来创建热图 otgU6S7F  
    CUR70[pB)  
    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。 PHh&@:  
    将如下的代码放置在树形文件夹 Embedded Scripts, "2'pS<|  
    !w9w{dtW=  
    ^ |^Q(  
    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。 a5AD$bP  
    BcvCm+.S:  
    绿色字体为说明文字, Z `)}1|~B  
    h NCoX*icd  
    '#Language "WWB-COM" _a 40lcP  
    'script for calculating thermal image map CF:s@Z+  
    'edited rnp 4 november 2005 tM$w0Cj  
    FX#fh 2  
    'declarations 9 ZD4Gv   
    Dim op As T_OPERATION /=bg(?nX  
    Dim trm As T_TRIMVOLUME /.u0rxoRP}  
    Dim irrad(32,32) As Double 'make consistent with sampling Do&/+Ssnu  
    Dim temp As Double <+oTYPgD9  
    Dim emiss As Double #&cNR_"w  
    Dim fname As String, fullfilepath As String fv",4L  
    %fyah}=  
    'Option Explicit R}-<ZJe  
    XOe8(cXa9  
    Sub Main 8sG0HI$f+  
        'USER INPUTS };:+0k/  
        nx = 31 AGe\PCn-  
        ny = 31 VHlN;6Qlff  
        numRays = 1000 RnX:T)+o  
        minWave = 7    'microns l?N|Gj;ZFZ  
        maxWave = 11   'microns w<ol$2&B  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 nKzS2 u=:Y  
        fname = "teapotimage.dat" f;nO$h[Qb  
    yR Zb_Mq9U  
        Print "" w)hH8jx{  
        Print "THERMAL IMAGE CALCULATION" GuV.7&!x  
    x@ZxV*T^  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 i@C1}o-/  
    : ;nvqbd  
        Print "found detector array at node " & detnode g(i_di  
    =wEqI)Td  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 %`cP|k  
    csPziH$wl  
        Print "found differential detector area at node " & srcnode s 9Y'MQo*  
    O{^ET:K@  
        GetTrimVolume detnode, trm mP@< UjxI  
        detx = trm.xSemiApe \C )S3!h  
        dety = trm.ySemiApe cF[L6{Oe  
        area = 4 * detx * dety i7D)'4gkW  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety MrW#~S|ED  
        Print "sampling is " & nx & " by " & ny B J0P1vh6M  
    KZ"&c~[  
        'reset differential detector area dimensions to be consistent with sampling 0.9%m7.m  
        pixelx = 2 * detx / nx b=5"*=T{+  
        pixely = 2 * dety / ny @MS}tZ5  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False _%xe:X+ M  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 xIN&>D'|N  
    TJHab;7F  
        'reset the source power DcO$&)Eb  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) {W[OjPC~F  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" m M> L0  
    XA&Vtgu  
        'zero out irradiance array %[<@$qP  
        For i = 0 To ny - 1 yBJf'-K  
            For j = 0 To nx - 1 vqC!Ajm  
                irrad(i,j) = 0.0 (9#$za>  
            Next j 4@b~)av)  
        Next i JH4hy9i  
    )O xsasn)M  
        'main loop =i4%KF9 x  
        EnableTextPrinting( False ) ,eI2#6w|C  
    $Z{ap  
        ypos =  dety + pixely / 2 3tO=   
        For i = 0 To ny - 1 >9Yo:b:f  
            xpos = -detx - pixelx / 2 ^ZxT0oaL  
            ypos = ypos - pixely qT<OiIMj^  
    $ ]ew<j  
            EnableTextPrinting( True ) -W/Lg5eK  
            Print i <sALA~p|0  
            EnableTextPrinting( False ) \iBEyr]  
    I`$"6 Xy  
    PQu_]cXI  
            For j = 0 To nx - 1 lUL6L 4m  
    W E-cq1)  
                xpos = xpos + pixelx N(6Q`zs  
    q X"Pg  
                'shift source 3 #8bG(  
                LockOperationUpdates srcnode, True | ODi[~y  
                GetOperation srcnode, 1, op /IO<TF(X  
                op.val1 = xpos HX;JO[0  
                op.val2 = ypos #~_ZG% u  
                SetOperation srcnode, 1, op GOKca%DT=  
                LockOperationUpdates srcnode, False $s2Y,0>I6  
    I"=a:q  
    raytrace XF6ed  
                DeleteRays wM-I*<L>  
                CreateSource srcnode ?M}W ;Z  
                TraceExisting 'draw '`)r<lYN,  
    qZV.~F+  
                'radiometry g< F7UA  
                For k = 0 To GetEntityCount()-1 ^$N}[1   
                    If IsSurface( k ) Then (bX77 Xr  
                        temp = AuxDataGetData( k, "temperature" ) K P1;u#v  
                        emiss = AuxDataGetData( k, "emissivity" ) L@|xpq  
                        If ( temp <> 0 And emiss <> 0 ) Then /8Sr(  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) 7f$ hg8  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) Z[, A>tJ  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi hxB` hu-  
                        End If [P3].#"]M=  
    SHAC(3o /e  
                    End If {o."T/?d'  
     )S8fFV  
                Next k `y^tCJ2u*  
    N!{waPbPi  
            Next j 6T qs6*  
    DjMhI_Yu  
        Next i Fk-}2_=v i  
        EnableTextPrinting( True )  CJ~gE"  
    Xi:y35q  
        'write out file G-DvM6T  
        fullfilepath = CurDir() & "\" & fname J"$Y`;  
        Open fullfilepath For Output As #1 6^+T_{gl  
        Print #1, "GRID " & nx & " " & ny ,ix>e  
        Print #1, "1e+308" 3d>3f3D8;  
        Print #1, pixelx & " " & pixely ]\.3<^  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 Ih;I&D+e;  
    #cAX9LV  
        maxRow = nx - 1 ~ Pm[Ud  
        maxCol = ny - 1 C-TATH%f^  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) \7d T]VV  
                row = "" W]-c`32~S  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) ssx #\  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string uto E}U7]  
            Next colNum                     ' end loop over columns ?r%kif)  
    79bt%P  
                Print #1, row {S Oy-  
    k ^:+Pp  
        Next rowNum                         ' end loop over rows p(8[n^~,i  
        Close #1 (nUSgZz5  
    k0e {c  
        Print "File written: " & fullfilepath \G~<O071  
        Print "All done!!" u]uUm1Er  
    End Sub BMJsR0  
    KB\A<(o,  
    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: o6@`aU  
    }R\;htmc;  
    jg3 X6/'  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 T:G8xI1 P  
      
    h%[1V  
    {I9<W'k{  
    打开后,选择二维平面图: Es^=&2 ''  
    =*\(Y (0  
     
    分享到