切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1527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。 ]Btkoad  
    =5+*TL`  
    成像示意图
    Ha@; Sz<R  
    首先我们建立十字元件命名为Target "313eeIt%i  
    FO2e7p^Q  
    创建方法: o <q*3L5  
    WUYI1Ij;  
    面1 : $O%{l.-O  
    面型:plane j!u)V1,  
    材料:Air kTvM,<  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box ~Bzzu % S  
    IP62|~Ap  
    ShB]U5b:k  
    辅助数据: 'X?xn@?  
    首先在第一行输入temperature :300K, =01X  
    emissivity:0.1; r`O Yq  
    ~K;QdV=YX  
    n<ZPWlJ  
    面2 : BN_h3|)  
    面型:plane sl]< A[jR  
    材料:Air cSb;a\el$  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box )% 7P?^>  
    x|6]+?l@6  
    R?xb1yc7_  
    位置坐标:绕Z轴旋转90度, "D(Lp*3hj&  
    Z?axrGmg0  
    kWzN {]v  
    辅助数据: Aedf (L7\  
    $coO~qvU  
    首先在第一行输入temperature :300K,emissivity: 0.1; & LE5' .s  
    -JMn?]  
    NQ9v[gv  
    Target 元件距离坐标原点-161mm; 2c9?,Le/;  
    .Bm%  
    WgtLKRZ\  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 <)VgGjZ-H  
    '0+*  
    y0* rY  
    探测器参数设定: P49\A^5S!  
    3A7774n=P  
    在菜单栏中选择Create/Element Primitive /plane :L[>!~YG_n  
    {K,In)4  
    aB]0?C y9(  
    P6:C/B  
    oUv26t~  
    xnP!P2  
    元件半径为20mm*20,mm,距离坐标原点200mm。 ]{>AU^=U  
    @A/k"Ax{r  
    光源创建: Jz@~$L  
    (f#(B2j  
    光源类型选择为任意平面,光源半角设定为15度。 ym%UuC3^w  
    oo5=5s6 3}  
    22\!Z2@T/  
    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。 AU{"G  
    drq3=2  
    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 Z~5) )5Ye;  
    tdy2ZPVtTV  
    M+/xw8}a  
    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。 Cm}2>eH  
    r* *zjv>  
    创建分析面: wKV4-uyr  
    NTg@UT <  
    wVf~FssN  
    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。 UtZ,q!sg  
    zZ5:)YiW-  
    :GHv3hn5  
    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。 KpLmpK1  
    C* 7/iRe  
    FRED在探测器上穿过多个像素点迭代来创建热图 {zdMmpQF  
    WjV15\,  
    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。 r"h;JC/&<T  
    将如下的代码放置在树形文件夹 Embedded Scripts, ~wc :/UM|  
    (i1JRn-f  
    !vnQ;g5  
    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。 -yYdj1y;  
    gYpMwC{*d  
    绿色字体为说明文字, wj|Zn+{"nF  
    pSZ2>^";  
    '#Language "WWB-COM" % RSZ.  
    'script for calculating thermal image map IK~&`n](>  
    'edited rnp 4 november 2005 +6m.f,14q  
    I[ \~ pi,  
    'declarations E-e(K8R  
    Dim op As T_OPERATION /7Q|D sa  
    Dim trm As T_TRIMVOLUME =OVDJ0ozZ  
    Dim irrad(32,32) As Double 'make consistent with sampling 6 SSDc/  
    Dim temp As Double FR&`R  
    Dim emiss As Double !3ggQG!e  
    Dim fname As String, fullfilepath As String NkE0S`Xf  
    ,Kit@`P%  
    'Option Explicit =bVPHrKNQ  
    .6B\fr.za  
    Sub Main .R9Z$Kbq  
        'USER INPUTS 4E'9;tA3l  
        nx = 31 p{FI_6db  
        ny = 31 aQk&#OQy  
        numRays = 1000 3r\8v`^>  
        minWave = 7    'microns s0kp(t!fiu  
        maxWave = 11   'microns 8xpplo8  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 wBPo{  
        fname = "teapotimage.dat" $Y$9]G":  
    &hCbXs=  
        Print "" 5~Y`ikwxL  
        Print "THERMAL IMAGE CALCULATION" uOxHa>h  
    !_S>ER  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 D$>_W,*V  
    3Ob.OwA  
        Print "found detector array at node " & detnode sdu?#O+c1  
    Fsx?(?tCMo  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 u8e_Lqx?  
    BFLef3~.0  
        Print "found differential detector area at node " & srcnode 'J|2c;M\x  
    !>UlvT-  
        GetTrimVolume detnode, trm &W `xZyb3  
        detx = trm.xSemiApe >}5?`.K~Q*  
        dety = trm.ySemiApe gk]QR.  
        area = 4 * detx * dety g7oY1;  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety Onmmcem  
        Print "sampling is " & nx & " by " & ny 4s\spvJ  
    h}bfZL  
        'reset differential detector area dimensions to be consistent with sampling q76POytV|  
        pixelx = 2 * detx / nx MvVpp;bd  
        pixely = 2 * dety / ny R>' %}|v/  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False h}b:-a  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 VYyija:  
    O*yxOb*  
        'reset the source power Iv`IJQH>  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) w~'xZ?  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" T U%@_vYR  
    MNT~[Z9L5G  
        'zero out irradiance array UD I{4+z  
        For i = 0 To ny - 1 bbm\y] !t  
            For j = 0 To nx - 1 5/H,UL  
                irrad(i,j) = 0.0 f^c+M~\JKj  
            Next j )U^=`* 7  
        Next i  Et>#&Nw8  
    3? {AGJ1  
        'main loop "TRS(d|3  
        EnableTextPrinting( False ) .Po"qoGy  
     0^;2  
        ypos =  dety + pixely / 2 : =QX^*  
        For i = 0 To ny - 1 L"_X W no  
            xpos = -detx - pixelx / 2 .RQra+up  
            ypos = ypos - pixely  7WJ \nK  
    bMH~vR  
            EnableTextPrinting( True ) ZsGvv]P  
            Print i @SQsEq+A?\  
            EnableTextPrinting( False ) gLiJ&H  
    Dc9uq5l  
    \0$+*ejz  
            For j = 0 To nx - 1 'H1~Zhv  
    "CJVtO  
                xpos = xpos + pixelx 0zt]DCdY  
    ,GbmL8P7Y  
                'shift source OV>& `puL  
                LockOperationUpdates srcnode, True &(F c .3m  
                GetOperation srcnode, 1, op 8f@}-  
                op.val1 = xpos h$S#fY8   
                op.val2 = ypos OvfluFu7  
                SetOperation srcnode, 1, op >7U/TVd&  
                LockOperationUpdates srcnode, False }$6L]   
    }\4yU=JP K  
    raytrace 3i^X9[.  
                DeleteRays XqH@3Ehk  
                CreateSource srcnode "k zKQ~  
                TraceExisting 'draw }~FX!F#oU  
    M!&Hn,22  
                'radiometry ]4:QqdV  
                For k = 0 To GetEntityCount()-1 tr<~:&H4T  
                    If IsSurface( k ) Then fI.|QD*$b  
                        temp = AuxDataGetData( k, "temperature" )  *7m lH  
                        emiss = AuxDataGetData( k, "emissivity" ) x6ghO-s  
                        If ( temp <> 0 And emiss <> 0 ) Then (qn=BP I  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) CTMC78=9}  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) G|i0n   
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi yi7.9/;a  
                        End If h*w9{[L  
    7Sdo*z  
                    End If Z)!8a$M~  
    :X>Wd+lY:_  
                Next k n,I3\l9  
    lyn%r  
            Next j @@d_F<Ym[  
    Kda'N$|`  
        Next i 6<&~ R 3dQ  
        EnableTextPrinting( True ) mV0,T*}e  
    F:j@JMpQ  
        'write out file IZVP-  
        fullfilepath = CurDir() & "\" & fname !Tzo &G  
        Open fullfilepath For Output As #1 Mj0 ,Y#=76  
        Print #1, "GRID " & nx & " " & ny B,b8\\^k|  
        Print #1, "1e+308" >$Y/B=e  
        Print #1, pixelx & " " & pixely ZL|aB886  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 Bdo{zv&A  
    eORXyh\K  
        maxRow = nx - 1 Pnytox  
        maxCol = ny - 1 IjI'Hx  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) 0U42QEG2  
                row = "" q,v<:sS9T  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) m8n)sw,,  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string :Cq73:1\B  
            Next colNum                     ' end loop over columns N0 {e7M  
    cILS  
                Print #1, row +n^M+ea;  
    Gxr\a2Z&r%  
        Next rowNum                         ' end loop over rows |q`NJ  
        Close #1 ~aC ?M&  
    <kB:`&X<\  
        Print "File written: " & fullfilepath vQWmHv\P  
        Print "All done!!" ]545:)Q1  
    End Sub 0X)vr~`  
    PV68d; $:8  
    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: 5c- P lm%  
    s5~k]"{j  
    v9(5H Y  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 !73y(Y%TE  
      
    y2W+YV*  
    t]K20(FSN  
    打开后,选择二维平面图:  "'4  
    !Asncc G  
     
    分享到