切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1127阅读
    • 0回复

    [分享]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
    5611
    光币
    22207
    光券
    0
    只看楼主 倒序阅读 楼主  发表于: 2020-11-18
    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。 rj ]F87"  
    Jo(`zuLJ  
    成像示意图
    Bm$"WbOq*R  
    首先我们建立十字元件命名为Target n>3U_yt6b  
    &K_)#v`|  
    创建方法: $\o {_?}1  
    c:S] R"  
    面1 : p?[Tm*r  
    面型:plane YG:3Fhx0~  
    材料:Air !1T\cS#1%  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box bUV >^d  
    <tpmUA[]  
    'oNO-)p\#!  
    辅助数据: #?MY&hdU9  
    首先在第一行输入temperature :300K, _iKq~\v2  
    emissivity:0.1; .Ig+Dj{)  
    wHZW `  
    cUqn<Z<n  
    面2 : 3<=,1 cU  
    面型:plane j.~!dh$mg  
    材料:Air 2Y}?P+:%>  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box ~AY N  
    U<"WK"SM  
    U~{du;\  
    位置坐标:绕Z轴旋转90度, )m6M9eC  
    MUOa@O,  
    ')a(.f  
    辅助数据: i| \6JpNA:  
    kP#e((f,  
    首先在第一行输入temperature :300K,emissivity: 0.1; kdz=ltw  
    NC&DFJo  
    u&G.4QQF  
    Target 元件距离坐标原点-161mm; 4?N8R$  
    `&0Wv0D0  
    !$2Z-!  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 pZ`|iLNl-  
    bNT9 H`P  
    ob+euCuJ  
    探测器参数设定: %1pYE Hn  
    ]# t6Jwk  
    在菜单栏中选择Create/Element Primitive /plane 3mPjpm  
    \ w3]5gJZ  
    HW&%T7 a  
     zYXV;  
    [dtbkQt,c  
    (SSRY9  
    元件半径为20mm*20,mm,距离坐标原点200mm。 R.7:3h  
    j4=(H:c~E  
    光源创建: hF2IW{=!  
    V"cKJ;s  
    光源类型选择为任意平面,光源半角设定为15度。 |t$Ma'P  
    O1')nYF7  
    -}K<ni6  
    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。 }b1cLchl  
    `1:{0p2q  
    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 fs/*V~@  
    a>\vUv*  
    )M2F4[vcb  
    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。 fnx-s{c?  
    SkU9ON   
    创建分析面: Y^<bl2"y8  
    x@8a''  
    hY`\&@  
    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。 `y+tf?QN  
    OR[{PU=X  
     Q1@A2+ c  
    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。 k4 F"'N   
    F5S@I;   
    FRED在探测器上穿过多个像素点迭代来创建热图 FLEo*9u>b  
    +S Jd@y@fR  
    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。 4@xE8`+b G  
    将如下的代码放置在树形文件夹 Embedded Scripts, #m={yck *  
    (5\N B0  
    (h:Rh  
    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。 >LDhU%bH  
    V')0 Mr  
    绿色字体为说明文字, R :B^  
    \l~*PG2  
    '#Language "WWB-COM" 1^gl}^|B  
    'script for calculating thermal image map Bj7gQ%>H4  
    'edited rnp 4 november 2005  T Q,?>6n  
    @IXsy  
    'declarations v$^Z6>vVI  
    Dim op As T_OPERATION y!xE<S&Y  
    Dim trm As T_TRIMVOLUME 6Cp]NbNrq  
    Dim irrad(32,32) As Double 'make consistent with sampling >t7x>_~   
    Dim temp As Double K(aJi,e>  
    Dim emiss As Double r(9~$_(vK  
    Dim fname As String, fullfilepath As String u{L!n$D7  
    3do)Vg4  
    'Option Explicit Ha)ANAD  
    Jec'`,Y  
    Sub Main bV"G~3COy  
        'USER INPUTS 4bgqg0z>  
        nx = 31 QE7V. >J_p  
        ny = 31 ^Ox3XC  
        numRays = 1000 qgrg CJ  
        minWave = 7    'microns W 5R\Q,x6  
        maxWave = 11   'microns iTaWup  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 D+>1]ij  
        fname = "teapotimage.dat" mx=BD'  
    jVq(?Gc  
        Print "" 2PG [7u^  
        Print "THERMAL IMAGE CALCULATION" 4f<$4d^md  
    jRatm.N  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 TiH) 5  
    B/n[m@O  
        Print "found detector array at node " & detnode 9YBv|A  
    "!EcbR  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 x,'!eCKN  
    :<|<|qJWo  
        Print "found differential detector area at node " & srcnode ]~Z6;  
    aCL!]4K84$  
        GetTrimVolume detnode, trm (P`3 @H  
        detx = trm.xSemiApe N 8-oY$*  
        dety = trm.ySemiApe SV(]9^nW  
        area = 4 * detx * dety 7hcNf,  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety  E6WA}_  
        Print "sampling is " & nx & " by " & ny ?^N3&ukkyo  
    nqf,4MR  
        'reset differential detector area dimensions to be consistent with sampling \7*`}&  
        pixelx = 2 * detx / nx T' ~!9Q  
        pixely = 2 * dety / ny n..g~ $k  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False 1</kTm/Qa  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 .(WQYOMl0  
    %!1Q P[}K  
        'reset the source power }C|dyyr  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) 9`9R!=NM  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" fYW6b[lI  
    -ne Kuj  
        'zero out irradiance array vEn4L0D  
        For i = 0 To ny - 1 &>Vfa  
            For j = 0 To nx - 1 p l&Muv  
                irrad(i,j) = 0.0 tzh1s i  
            Next j >i6yl5s  
        Next i & :7ZQ1  
    42qYg(tZ  
        'main loop q?ix$nKOv  
        EnableTextPrinting( False ) vz!s~cAt  
    ',S'.U  
        ypos =  dety + pixely / 2 cSm%s  
        For i = 0 To ny - 1 dYgXtl=#j  
            xpos = -detx - pixelx / 2 LA)[ip4  
            ypos = ypos - pixely jfqopiSi  
    W='> :H  
            EnableTextPrinting( True ) 6!(@@^7{*  
            Print i "T- `$'9  
            EnableTextPrinting( False ) s S7c!  
    VZl6t;cn  
    QMpoa5ZQG  
            For j = 0 To nx - 1 ;I!MLI  
    cx0*X*  
                xpos = xpos + pixelx s91JBP|B7  
    N~xLu8,  
                'shift source qZA).12qS  
                LockOperationUpdates srcnode, True '3 ^+{=q  
                GetOperation srcnode, 1, op j+ LawW-  
                op.val1 = xpos +PuPO9jKO@  
                op.val2 = ypos Kp,M"Y  
                SetOperation srcnode, 1, op `9b7>Nn<  
                LockOperationUpdates srcnode, False lgtC|k M=  
    s]JF0584  
                'raytrace qC?:*CXH  
                DeleteRays ~7Tc$ "I  
                CreateSource srcnode ,c)uX#1  
                TraceExisting 'draw .uk>QM s1  
     ({=gw9f  
                'radiometry }7.PH'.8  
                For k = 0 To GetEntityCount()-1 |a!fhl+  
                    If IsSurface( k ) Then }x wu*Zx  
                        temp = AuxDataGetData( k, "temperature" ) #gcF"L||  
                        emiss = AuxDataGetData( k, "emissivity" ) x HhN  
                        If ( temp <> 0 And emiss <> 0 ) Then E3iW-B8u8  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) L~NbdaO  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) $"H{4 x`-  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi 4zo5}L `Y  
                        End If 6<ZkJ:=  
    Aj4T"^fv  
                    End If Sh8"F@P8  
    !f+H,]D"  
                Next k jYhB +|  
    LmnymcH  
            Next j >M/V oV  
    f|tjsZxQ  
        Next i mA=i)Ga  
        EnableTextPrinting( True ) /x1![$oC0  
    Ub * wuI  
        'write out file 9c6gkt9eB  
        fullfilepath = CurDir() & "\" & fname 2mGaD\?K  
        Open fullfilepath For Output As #1 AQiwugs  
        Print #1, "GRID " & nx & " " & ny SrK)t.oK  
        Print #1, "1e+308" iB& 4>+N+  
        Print #1, pixelx & " " & pixely vsl]92xI  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 9^G/8<^^>  
    u!W0P6   
        maxRow = nx - 1 { >)#HD  
        maxCol = ny - 1 @("a.;1#o  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) ktpaU,%  
                row = "" DS[#|  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) Cy=Hy@C  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string Xn%pNxUL  
            Next colNum                     ' end loop over columns Gvr@|{k  
    Nu?-0>  
                Print #1, row n4#;k=mA  
    d! LE{  
        Next rowNum                         ' end loop over rows +y3%3EKs1~  
        Close #1 d5gR"ja  
    !74S  
        Print "File written: " & fullfilepath 5X:*/FuS@  
        Print "All done!!" G%W8S \  
    End Sub j?x>_#tIY  
    @dPTk"P  
    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: sv&;Y\2c  
    )j0TeE1R  
    >^*+iEe  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 #T=LR@y  
      
    &RnTzqv  
    vbC\?\_  
    打开后,选择二维平面图: WL?\5?G 9l  
    .G#8a1#  
    QQ:2987619807
    < F.hZGss7  
     
    分享到