切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1779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
    6531
    光币
    26804
    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。 ySXQn#}-,  
    MPxe|Wws  
    成像示意图
    k#Bq8d  
    首先我们建立十字元件命名为Target 2TxHY|4  
    pndAXO:v  
    创建方法: 41'|~3\X  
    O*%@(w6  
    面1 : }vGW lNd#g  
    面型:plane G&?,L:^t  
    材料:Air fSL'+l3  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box Vr1yj  
    ='"hB~[  
    JXa5snh{h  
    辅助数据: N)tqjq  
    首先在第一行输入temperature :300K, (tLAJ_v!.K  
    emissivity:0.1; U<"@@``+N  
    ( ;(DI^Un8  
    *53@%9 {u  
    面2 : oTjsiXS  
    面型:plane +uD4$Wt_F  
    材料:Air y))) {X  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box X":T>)J-  
    q0a8=o"|  
    }kK6"]Tj  
    位置坐标:绕Z轴旋转90度, o8A1cb4<T  
    :Q@qR((&o  
    d2!A32m  
    辅助数据: Dno'-{-  
    bWe_<'N  
    首先在第一行输入temperature :300K,emissivity: 0.1; Q Jnji  
    f'>270pH  
    &LD=Zp%  
    Target 元件距离坐标原点-161mm; *sPG,6>  
     \W',g[Y:  
    gq+|Hr  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 0:SR29(p1  
    i4XE26B;e  
    ;*Z.|?3 MM  
    探测器参数设定: mTsl"A>  
    VYj*LiR  
    在菜单栏中选择Create/Element Primitive /plane d77->FX2  
    jwe^(U  
    n=+K$R  
    k ='c*`IE  
    (r]3tGp  
    !B#Lea  
    元件半径为20mm*20,mm,距离坐标原点200mm。 l^$8;$Rq  
    |~Op|gs  
    光源创建: \`!M5FJ  
    :{YOJDtR  
    光源类型选择为任意平面,光源半角设定为15度。 ox2?d<dC6  
    >Wbt_%dKy  
     >>nt3q  
    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。 sr*3uI-)L  
    '0juZ~>}  
    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:wx@9m)  
    -q}c;0vL-a  
    v p>,}nx4  
    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。 n.a55uy  
    ^-24S#KE  
    创建分析面: X9YYUnR2  
    x<S?"  
    ?<l,a!V'6  
    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。 !}TZmwf'  
    O'OVj  
    ^Iz(V2  
    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。 Eed5sm$H  
    g20,et  
    FRED在探测器上穿过多个像素点迭代来创建热图 9AxeA2/X  
    /;[Zw8K7  
    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。 [ ; $(;  
    将如下的代码放置在树形文件夹 Embedded Scripts, k!^Au8Up?  
    _Kw<4 $0<p  
    6;:s N8M+1  
    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。 $GR 3tLzK:  
    C XZO  
    绿色字体为说明文字, vwlPFr Ll  
    G/w&yd4  
    '#Language "WWB-COM" vuOixAkw  
    'script for calculating thermal image map |Zn |?#F  
    'edited rnp 4 november 2005 xux j  
    CfSpwkg  
    'declarations %s^2m"ca}=  
    Dim op As T_OPERATION .sO.Y<- fl  
    Dim trm As T_TRIMVOLUME \R6D'Yt  
    Dim irrad(32,32) As Double 'make consistent with sampling _aR_ [  
    Dim temp As Double ex- 0@  
    Dim emiss As Double ncGg@$E  
    Dim fname As String, fullfilepath As String ?_!} lg  
    " wB~*,Ny  
    'Option Explicit CPw=?<db  
    aMxg6\8  
    Sub Main '\&t3?;  
        'USER INPUTS 123 6W+  
        nx = 31 sn4wd:b7%  
        ny = 31 2itJD1;  
        numRays = 1000 {GTOHJ2  
        minWave = 7    'microns 4490l"  
        maxWave = 11   'microns (sXR@Ce$  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 (4hCT*  
        fname = "teapotimage.dat" Y6>@zznk  
     2]$ 7  
        Print "" Jj_ t0"  
        Print "THERMAL IMAGE CALCULATION" Ic%c%U=i  
    x8#bd{  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 ?8g*"& cn  
    C6$F.v  
        Print "found detector array at node " & detnode 9L$bJO-3  
    ^F>C|FJ2  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 i #uc  
    E3):8>R;1  
        Print "found differential detector area at node " & srcnode 8BL ]]gT-I  
     8>}k5Qu  
        GetTrimVolume detnode, trm +/bT4TkML  
        detx = trm.xSemiApe ({GN.pC(  
        dety = trm.ySemiApe G,VTFM6  
        area = 4 * detx * dety XIgGE)n  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety ;^Q - 1  
        Print "sampling is " & nx & " by " & ny j~|pSu.<  
    P6n9yJ$,cb  
        'reset differential detector area dimensions to be consistent with sampling 6`ZHFem  
        pixelx = 2 * detx / nx w?r   
        pixely = 2 * dety / ny 'zEmg}  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False KA=cIm  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 deRnP$u0  
    dB{VY+!  
        'reset the source power W? `%it5  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) lK}W%hzU  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" TqvgCk-  
    0|RFsJ"  
        'zero out irradiance array ,)S(SnCF  
        For i = 0 To ny - 1 +"u6+[E  
            For j = 0 To nx - 1 ?89K [D|  
                irrad(i,j) = 0.0 @v#]+9F  
            Next j NrHh(:  
        Next i t_VF=B^LuR  
    N"tEXb/,  
        'main loop lg9`Z>?  
        EnableTextPrinting( False ) =i`#0i2(  
    \:'|4D]'I  
        ypos =  dety + pixely / 2 {^Y0kvnd  
        For i = 0 To ny - 1 -f{NVX\<0  
            xpos = -detx - pixelx / 2 yF~iVt  
            ypos = ypos - pixely sX8?U,u  
    >=T\=y  
            EnableTextPrinting( True ) q ,C)AZ  
            Print i P?.j wI  
            EnableTextPrinting( False ) *0*1.>Vg  
    )L,.K O  
    [m}58?0~x  
            For j = 0 To nx - 1 c{qoASc?  
    Xy0KZ !  
                xpos = xpos + pixelx Y &G]M  
    Hn- k*Y/P  
                'shift source +d$l1j  
                LockOperationUpdates srcnode, True 9XH}/FcP_O  
                GetOperation srcnode, 1, op rJ@yOed["b  
                op.val1 = xpos w b@Zna  
                op.val2 = ypos }"sZ)FE  
                SetOperation srcnode, 1, op #fuc`X3:HL  
                LockOperationUpdates srcnode, False >h[ {_+  
    wG, "ZN  
    raytrace Nydhal00  
                DeleteRays [pc6!qhDG&  
                CreateSource srcnode 8|*=p4_fn  
                TraceExisting 'draw DKvNQ:fI>9  
    B uv4&.Z}  
                'radiometry GWQ_X9+q  
                For k = 0 To GetEntityCount()-1 #VLO6  
                    If IsSurface( k ) Then ITq$8  
                        temp = AuxDataGetData( k, "temperature" ) hv6w=?7  
                        emiss = AuxDataGetData( k, "emissivity" ) p5`d@y\hj  
                        If ( temp <> 0 And emiss <> 0 ) Then ff1Em.  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) U,Duq^l~s  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) f<Co&^A  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi +RuPfw{z  
                        End If G T3wJQ5N  
    RH"&B`  
                    End If HZG<aY="  
    I1TzPe  
                Next k |.qK69  
    ,o_Ur.UJ  
            Next j ]h`<E~  
    9uRs@]i  
        Next i ToNRY<!  
        EnableTextPrinting( True ) clcj5=:  
    IIrXI8'}  
        'write out file }+" N '  
        fullfilepath = CurDir() & "\" & fname %)|_&Rh  
        Open fullfilepath For Output As #1 gk*Md+  
        Print #1, "GRID " & nx & " " & ny xIrRFK9[Q  
        Print #1, "1e+308" _BA2^C':c{  
        Print #1, pixelx & " " & pixely Ep@NT+VnI  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 jW?siQO^  
    4ZRE3^y\"  
        maxRow = nx - 1 :Hn*|+'  
        maxCol = ny - 1 }EW@/; kC  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) mp\`9j+{  
                row = "" d- wbZ)BR  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) N@z+h  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string l5 FM>q  
            Next colNum                     ' end loop over columns ] VN4;R  
     <0,szw  
                Print #1, row 6*cY[R|q!  
    c T[.T#I  
        Next rowNum                         ' end loop over rows g#=~A&4q  
        Close #1 f a9n6uT  
    a9OJC4\  
        Print "File written: " & fullfilepath X+: >&&9  
        Print "All done!!" q*h1=H52  
    End Sub Gm]]Z_  
    vbZGs7%  
    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: ~(|~Ze>  
    #ilU(39e  
    T.=du$  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 .hD 2g"  
      
    ~HR/FGe?N  
    <IX)D `mf  
    打开后,选择二维平面图: %?4 G^f  
    `wyX)6A|bt  
     
    分享到