切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1843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
    6569
    光币
    26994
    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。 hb`(d_=7F  
    W*gu*H^s~  
    成像示意图
    x2;92I{5C,  
    首先我们建立十字元件命名为Target `XQM)A  
    C%l~qf1n  
    创建方法: Z?X ^7<  
    pS9CtQqvgy  
    面1 : K" Y,K  
    面型:plane xj(&EGY:  
    材料:Air A-uEZj_RD=  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box +\SbrB P  
    Z{ &PKS  
    wC;N*0Th  
    辅助数据: R|Y)ow51  
    首先在第一行输入temperature :300K, qd"*Td  
    emissivity:0.1; tPc'# .  
    Bm1yBKjO  
    KD=T04v  
    面2 : "@DCQ  
    面型:plane o1 QK@@}  
    材料:Air 19h8p>Sx0  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box zAS&L%^tV  
    jO3Z2/#  
    DtR-NzjB  
    位置坐标:绕Z轴旋转90度, 's+ Fd~ '  
    :U^a0s%B  
    a'rN&*P  
    辅助数据: i e%ZX  
    d2Bn`VI  
    首先在第一行输入temperature :300K,emissivity: 0.1; 0~Z2$`(  
    =2# C{u.  
    b2 duC  
    Target 元件距离坐标原点-161mm; 9-I;'  
    VWaI!bK  
    ?E=&LAI#  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 tNoo3&  
    w*OZ1|  
    8tY],  
    探测器参数设定:  jI[:`  
    C 3b  
    在菜单栏中选择Create/Element Primitive /plane S2w|\"  
    x=gZ7$?A  
     0'%R@|  
    :TxfkicN\  
    Ay22-/C|@  
    W1iKn  
    元件半径为20mm*20,mm,距离坐标原点200mm。 $*{PUj  
    |U>BXX P  
    光源创建: 1Hp0,R}  
    @I_A\ U{  
    光源类型选择为任意平面,光源半角设定为15度。 2(Vm0E  
    ; P&K a  
    ?x%HQ2`  
    我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 Jr==AfxyT  
    g < M\zD  
    我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线 4hr;k0sD  
    (G*--+Gn  
    YR=<xn;m.  
    功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 {;=I69 X  
    +MIDq{B  
    创建分析面: &NL=Bd  
     +,gI|  
    VX2 KE@  
    到这里元件参数设定完成,现在我们设定元件的光学属性,在前面我们分别对第一和第二面设定的温度和发射系数,散射属性我们设定为黑朗伯,4%的散射。并分别赋予到面一和面二。 T4F}MVK  
    5M;fh)fT  
    ck){N?y  
    到此,所有的光学结构和属性设定完成,通过光线追迹我们可以查看光线是否可以穿过元件。 4t|ril``]  
    i-vhX4:bd  
    FRED在探测器上穿过多个像素点迭代来创建热图 MLG%+@\  
    XTUxMdN  
    FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 z;xp1t @  
    将如下的代码放置在树形文件夹 Embedded Scripts, DyD#4J)E  
    c5+oP j  
    tz4MT_f  
    打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 ;oH17  
    HpC|dtro  
    绿色字体为说明文字, U"v(9m@  
    T2AyQ~5~  
    '#Language "WWB-COM" _>9|"seR  
    'script for calculating thermal image map a]>gDDF  
    'edited rnp 4 november 2005 3?|Fn8dQR.  
    (_^g:>)Cs  
    'declarations ka0T|$ u(s  
    Dim op As T_OPERATION >JkQ U e  
    Dim trm As T_TRIMVOLUME rUvqAfE&+  
    Dim irrad(32,32) As Double 'make consistent with sampling u-=S_e  
    Dim temp As Double G|Yw a=  
    Dim emiss As Double d+[yW7%J  
    Dim fname As String, fullfilepath As String $]<CC`  
    VLQDktj&  
    'Option Explicit '>^+_|2  
    sU^2I v\%  
    Sub Main mL?9AxO  
        'USER INPUTS KJo [!|.  
        nx = 31 9x0B9&  
        ny = 31 EDcR:Dw3  
        numRays = 1000 &^Zo}F2V  
        minWave = 7    'microns WO?EzQ ?  
        maxWave = 11   'microns BNw^ _j1  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 #I|Vyufw  
        fname = "teapotimage.dat" iNUisl  
    7L|w~l7R~  
        Print "" !@{_Qt1  
        Print "THERMAL IMAGE CALCULATION" 2f9~:.NgF  
    #O6SEK|Z  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 kj~)#KDN  
    (cAv :EKpo  
        Print "found detector array at node " & detnode rk*Igqf  
    p%EU,:I6  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 4(o: #9I  
    }@J&yrqg  
        Print "found differential detector area at node " & srcnode b#(SDNo6  
    RIJ+]uir4  
        GetTrimVolume detnode, trm f50qA;7k  
        detx = trm.xSemiApe ~Z!xS  
        dety = trm.ySemiApe <mjH#aSy  
        area = 4 * detx * dety []/=!?5B  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety R/R[r> 1)6  
        Print "sampling is " & nx & " by " & ny S}gUz9ks  
    %Qgo0  
        'reset differential detector area dimensions to be consistent with sampling 4- ^|e  
        pixelx = 2 * detx / nx k!H;(B"s-  
        pixely = 2 * dety / ny _6Wz1.]n  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False jhjGDF  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 QDYS}{A:V  
    QMea2q|3$  
        'reset the source power g6o-/A!Q3  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) O6LZ<}oUR  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" [X0Wfb}{  
    ]`0(^)U &  
        'zero out irradiance array rVowHP  
        For i = 0 To ny - 1 9a9<I  
            For j = 0 To nx - 1 BoYWx^VHx^  
                irrad(i,j) = 0.0 V|zzj[c  
            Next j +Gqh  
        Next i H$au02dpU  
    wUHuykF  
        'main loop ,LKY?=T$z  
        EnableTextPrinting( False ) 1,=U^W.G  
    aF2 eGh  
        ypos =  dety + pixely / 2 sJg-FVe2  
        For i = 0 To ny - 1 y?GRxoCD"e  
            xpos = -detx - pixelx / 2 ^Crl~~Gk`  
            ypos = ypos - pixely  /s.sW l  
    EQ1wyKZS2g  
            EnableTextPrinting( True ) S9d+#6rn  
            Print i ,u^i0uOg  
            EnableTextPrinting( False ) A]`63@-.  
    6pDb5@QjTy  
    hu%rp{m^,  
            For j = 0 To nx - 1 \2 &)b  
    _?#}@?  
                xpos = xpos + pixelx |UZPn>F~  
    ,+<NP}Yg#G  
                'shift source ]S9~2;2^,  
                LockOperationUpdates srcnode, True o7S,W?;=5  
                GetOperation srcnode, 1, op TzmoyY  
                op.val1 = xpos 0M(\xO  
                op.val2 = ypos ,u7: l  
                SetOperation srcnode, 1, op Lo _5r T"  
                LockOperationUpdates srcnode, False Bi/=cI  
    u'M \m7  
    raytrace w^e<p~i!^E  
                DeleteRays F?&n5R.  
                CreateSource srcnode qFp }+s  
                TraceExisting 'draw gfG Mu0FjB  
    cdVh_"[  
                'radiometry [R*UPa  
                For k = 0 To GetEntityCount()-1 _Z z" `  
                    If IsSurface( k ) Then hE0 p> R8  
                        temp = AuxDataGetData( k, "temperature" ) /{ Lo0  
                        emiss = AuxDataGetData( k, "emissivity" ) ^+tAgK2   
                        If ( temp <> 0 And emiss <> 0 ) Then pt<!b0G  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) ^M6xRkI  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) J[2c[|[-  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi v?BX 4FO  
                        End If 3Xyu`zS&   
    )w_0lm'v{r  
                    End If Gh}sk-Xk=  
    .)~IoIW=  
                Next k 37Ux2t  
    pYIm43r H  
            Next j y<jW7GNt  
    :5IbOpVM  
        Next i H+y(W5|2/X  
        EnableTextPrinting( True ) &QFg=  
    aal5d_Y  
        'write out file oV"#1lp*  
        fullfilepath = CurDir() & "\" & fname d6,SZ*AE  
        Open fullfilepath For Output As #1 9gR@Q%b)  
        Print #1, "GRID " & nx & " " & ny ZZk6 @C  
        Print #1, "1e+308" 0)n#$d>  
        Print #1, pixelx & " " & pixely 2<53y~Yi%  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 E uxD,(  
    > 5-z"f  
        maxRow = nx - 1 '*H&s  
        maxCol = ny - 1 D]n9+!Ec1f  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) |2w,Np-  
                row = "" ;zVtJG`  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) 'oSs5lW  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string uLXMEx<^  
            Next colNum                     ' end loop over columns hAq7v']m  
    &6 .r=,BO  
                Print #1, row s<,[xkMB  
    h^o>9s/|/H  
        Next rowNum                         ' end loop over rows 7(c7-  
        Close #1 W(U:D?e  
    t@(S=i7}-  
        Print "File written: " & fullfilepath |35"V3bs  
        Print "All done!!" t;X  !+  
    End Sub sbn|D\p  
    Ca}T)]//  
    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: /NRdBN  
     ;LEO+,6  
    Y&M}3H>E  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 1KwUp0% &  
      
    9XtR8MH  
    k\(LBZ"vR  
    打开后,选择二维平面图: Dn/{  s$\  
    k$]-fQM  
     
    分享到