切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1282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
    在线infotek
     
    发帖
    6385
    光币
    26070
    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#2)"V(  
    IrwQ~z3I  
    成像示意图
    , c.^"5  
    首先我们建立十字元件命名为Target {9IRW\kn  
    YMGy-]!o  
    创建方法: o$_0Qs$  
    B5\l&4X  
    面1 : +)jUA]hJ/  
    面型:plane o<g?*"TRh  
    材料:Air D#jwI,n}x  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box iUKjCq02  
    T2{e 1 =Z7  
    DR"Y(-xl  
    辅助数据: M-WSdG[AJ  
    首先在第一行输入temperature :300K, o Rfb4+H&  
    emissivity:0.1; ^Z (cV g  
    Zy0M\-Mn  
    2:LUB)&i  
    面2 : BD6!,  
    面型:plane |$.?(FZYu  
    材料:Air 8lQ/cGAc  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box LpHGt]|D  
    IRW0.'Dn  
    }gSoBu  
    位置坐标:绕Z轴旋转90度, ;W0J  
    L3]J8oEmU  
    N'1I6e"  
    辅助数据: g|)>65v  
    deVd87;@7[  
    首先在第一行输入temperature :300K,emissivity: 0.1; * :"*'  
    e9acI>^w  
    zK0M WyXO  
    Target 元件距离坐标原点-161mm; vc#o(?g  
    b+s'B4@rb  
    Aez2n(yac  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 [*%lm9 x  
    T! }G51  
    <Qq {&,Le  
    探测器参数设定: )Rr6@o  
    #rHMf%0  
    在菜单栏中选择Create/Element Primitive /plane <5Vf3KoC&  
    v}>g* @  
    QW..=}pL  
    (nqhX<T>  
     ff9m_P  
    @Y~gdK  
    元件半径为20mm*20,mm,距离坐标原点200mm。 <XL%*  
    Z@Rqm:e  
    光源创建: 5{ap  
    }#zL)+XI  
    光源类型选择为任意平面,光源半角设定为15度。 m?-)SA  
    .]9`eGVWj  
    9WHE4'Sa  
    我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 %/eG{ oh-  
    dcKpsX  
    我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线 +kI}O*s  
    Q-)(s  
    .)*&NY!nsl  
    功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 nS#F*)  
    CW`^fI9H  
    创建分析面: `=Mk6$%Cs  
    #jbC@A9Pe  
    IO7z}![V;  
    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。 e {6wFN  
    D(z#)oDr  
    :7@[=n  
    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。 WjBml'^RY  
    erI&XI  
    FRED在探测器上穿过多个像素点迭代来创建热图 TJ)Nr*U3_  
    Cq@7oi]W0  
    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。 fD%/]`y  
    将如下的代码放置在树形文件夹 Embedded Scripts, .p{lzI9  
    ErN[maix#  
    5REH`-  
    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。 Eq@sU?j  
    ~ESw* 6s9  
    绿色字体为说明文字, U["<f`z4\  
    iBWzxPv:z  
    '#Language "WWB-COM" s=$xnc}mf  
    'script for calculating thermal image map E[hSL#0  
    'edited rnp 4 november 2005 fe\'N4  
    I N@ ~~  
    'declarations \,v^v]|  
    Dim op As T_OPERATION QeY+imM  
    Dim trm As T_TRIMVOLUME 52^3N>X4X  
    Dim irrad(32,32) As Double 'make consistent with sampling ^uX"04>;  
    Dim temp As Double K*^'t ltJ  
    Dim emiss As Double Qc33C A  
    Dim fname As String, fullfilepath As String W'Gh:73'}  
    6rS ? FG=  
    'Option Explicit VI3fvGHat{  
    j gV^{8qG  
    Sub Main TaF*ZT2  
        'USER INPUTS (9bU\4F\  
        nx = 31 !:d\A  
        ny = 31 Eoz/]b  
        numRays = 1000 2w8YtM3+"z  
        minWave = 7    'microns VK9E{~0=  
        maxWave = 11   'microns va~:Ivl-)  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 e?\Od}Hbw  
        fname = "teapotimage.dat" D _\HX9  
    8<Nz34Y  
        Print "" C&q}&=3r  
        Print "THERMAL IMAGE CALCULATION" M|y!,/'  
    =5:vKL j  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 2!f'l'}  
    6 y"r '  
        Print "found detector array at node " & detnode E.'6p \  
    yyPj!<.MGP  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 =M{&g  
    1>_$O|dE  
        Print "found differential detector area at node " & srcnode r?`nc6$0|  
    E=v4|/['N  
        GetTrimVolume detnode, trm 823y;  
        detx = trm.xSemiApe a"+/fC`  
        dety = trm.ySemiApe w6 Y+Y;,'f  
        area = 4 * detx * dety fk#Ggp<  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety VQ~eg wJL  
        Print "sampling is " & nx & " by " & ny x ZAg  
    a$"Z\F:x  
        'reset differential detector area dimensions to be consistent with sampling PVKq&Q?  
        pixelx = 2 * detx / nx ?#5)TAW  
        pixely = 2 * dety / ny $ z+ =lF  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False G4F~V't  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 }WQ:Rmi  
    qztL M?iV  
        'reset the source power Cn9MboXX  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) .<P@6Jq  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" ieyqp~+|4$  
    OOsd*nX/  
        'zero out irradiance array ?s0")R&  
        For i = 0 To ny - 1 "Q23s"  
            For j = 0 To nx - 1 d[(%5pw~zL  
                irrad(i,j) = 0.0 .bMU$O1  
            Next j Mf:x9#  
        Next i ^w RD|  
    _i"[m(ABj1  
        'main loop {.,y v>%  
        EnableTextPrinting( False ) =66,$~g{  
    )o_$AbPt  
        ypos =  dety + pixely / 2 =2wy;@f  
        For i = 0 To ny - 1 Zfr?(y+3  
            xpos = -detx - pixelx / 2 z:$TW{%M  
            ypos = ypos - pixely J0Y-e39 `  
    nYY'hjZ  
            EnableTextPrinting( True ) 7"_g X  
            Print i 6 dCqS  
            EnableTextPrinting( False ) %8L5uMx  
    LZ9IE>sj  
    cW $~86u"C  
            For j = 0 To nx - 1 PI" )^`  
    {' |yb  
                xpos = xpos + pixelx \=g%W^i  
    M7lMOG (\  
                'shift source [C~{g#  
                LockOperationUpdates srcnode, True 2TC7${^9}J  
                GetOperation srcnode, 1, op -Kf'02  
                op.val1 = xpos Neb%D8/Kn  
                op.val2 = ypos 4VL]v9  
                SetOperation srcnode, 1, op lO|H:7  
                LockOperationUpdates srcnode, False 5h(] S[Zf3  
    Ib4 8`  
    raytrace ;c>Rjg&[  
                DeleteRays P(r}<SM  
                CreateSource srcnode W,n0'";')  
                TraceExisting 'draw k}Vu!+cz  
    >7V&pH'  
                'radiometry fx4X!(w!B  
                For k = 0 To GetEntityCount()-1 aKCXV[PO   
                    If IsSurface( k ) Then h:+>=~\  
                        temp = AuxDataGetData( k, "temperature" ) C>7k|;BvF  
                        emiss = AuxDataGetData( k, "emissivity" ) KH&xu,I  
                        If ( temp <> 0 And emiss <> 0 ) Then , v6[#NU_Z  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) PFIL)D |G  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) L``K. DF  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi WaWx5Fx+  
                        End If 5B( r[Ni b  
    !$5U\"M  
                    End If BT+ws@|[  
    4d3PF`,H`  
                Next k \*w*Q(&3  
    :FdV$E]]<  
            Next j $NWI_F4  
    NC2PW+(  
        Next i |v{ a5|<E  
        EnableTextPrinting( True ) C`x>)wm:  
    [H)p#x  
        'write out file 18!0H l>  
        fullfilepath = CurDir() & "\" & fname %P9Zx!i>  
        Open fullfilepath For Output As #1 B)"WG7W E  
        Print #1, "GRID " & nx & " " & ny |^@TA=_  
        Print #1, "1e+308" VG\ER}s&P  
        Print #1, pixelx & " " & pixely G\IH b |  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 fr\UX}o  
    >[Q(!Ai  
        maxRow = nx - 1 .|{*.YE  
        maxCol = ny - 1 4S.%y7d\  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) ) f'cy@b   
                row = "" 58MBG&a%  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) *Qg/W? "m  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string I\DT(9 'E  
            Next colNum                     ' end loop over columns VxfFk4  
    ?(U> )SvF  
                Print #1, row @v2kAOw[  
    eGLLh_V"  
        Next rowNum                         ' end loop over rows J(-#(kMyf  
        Close #1 G(4:yK0  
    Qo{^jDe,c*  
        Print "File written: " & fullfilepath B69NL  
        Print "All done!!" .)u,sYZA|  
    End Sub 4- 6'  
    "$:nz}  
    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: mrd(\&EhA  
    R{6.O+j`  
    -acW[$t  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 hgKs[ySo,3  
      
    <v[,A8Q  
    ;Fuxj!gF  
    打开后,选择二维平面图: !Nl"y'B|  
    FAU^(]-5m  
     
    分享到