切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 663阅读
    • 1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
    6401
    光币
    26150
    光券
    0
    只看楼主 倒序阅读 楼主  发表于: 2023-04-06
    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。 T)CzK<LbR  
    UH`hOJ?  
    成像示意图
    V,7%1TZ:  
    首先我们建立十字元件命名为Target ctmQWrk|B  
    *<V^2z$y_  
    创建方法: e&I t  
    kUHE\L.Y]  
    面1 : Lm)\Z P+W  
    面型:plane yl]FP@N(  
    材料:Air ?[)S7\rP  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box {==pZpyyh  
    "E!mva*NU  
    Tp%(I"H'_;  
    辅助数据: vFmJ;J  
    首先在第一行输入temperature :300K, l0]d  
    emissivity:0.1; }k$4/7ri  
    0(>rG{u  
    LX+5|u  
    面2 : Bn wzcl  
    面型:plane h+7>#*DH  
    材料:Air eOl KbJU  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box 5t:8.%<UK  
    <|6%9@  
    /)|X.D  
    位置坐标:绕Z轴旋转90度, 7()?C}Ni-  
    YrI|gz)  
    +RZ~LA \+  
    辅助数据: y f1CXldi  
    V-O(U*]  
    首先在第一行输入temperature :300K,emissivity: 0.1; VkmRh,T  
    Do-^S:.  
    |lQ;ALH!  
    Target 元件距离坐标原点-161mm; ~fN%WZ;_  
    [ .yJV`  
    M7}Q=q\9  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 =J'P.  
    Y Z}cB  
    ~Vh=5J~  
    探测器参数设定: 0OZMlt%z  
    1hQN8!:<  
    在菜单栏中选择Create/Element Primitive /plane ^J=hrYGA  
    !AN^ ,v]D  
    U\<-mXv  
    +",S2Qmo  
    _ *(bmJM  
    SOh-,c\C  
    元件半径为20mm*20,mm,距离坐标原点200mm。 [uuj?Rbd  
    {+T/GBF-K=  
    光源创建: {a q9i  
    'VnwG  
    光源类型选择为任意平面,光源半角设定为15度。 Se^^E.Z,W  
    s&PM,BFf  
    3fS}:!sQ  
    我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 9 t:]  
    L&2u[ml  
    我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线 *7gT}O;p 5  
    )$M,Ul  
    l[h'6+o  
    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。 )najO *n  
    7!V @/S}7  
    创建分析面: #*$p-I=  
    sRRI3y@  
    1 i|.h  
    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。 $^%N U  
    y.a]r7  
    5 9 2;W-y  
    到此,所有的光学结构和属性设定完成,通过光线追迹我们可以查看光线是否可以穿过元件。 4cgIEw[6  
    n]? WCG}cd  
    FRED在探测器上穿过多个像素点迭代来创建热图 Utl t<  
    >%%=0!,yX  
    FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 gSi5u# }J  
    将如下的代码放置在树形文件夹 Embedded Scripts, 19u =W(  
    J1F{v)T '?  
    UsW5d]i}Y  
    打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 649 !=  
    I44s(G1j l  
    绿色字体为说明文字, %_)zWlN  
    i.a _C'<$  
    '#Language "WWB-COM" /p`&;/V|  
    'script for calculating thermal image map Epjff@ 7A  
    'edited rnp 4 november 2005 e<+<lj "  
    :[7lTp   
    'declarations MgJ5B(c  
    Dim op As T_OPERATION c.K =(y*  
    Dim trm As T_TRIMVOLUME 5G*II_j  
    Dim irrad(32,32) As Double 'make consistent with sampling /'&;Q7!)  
    Dim temp As Double fj']?a!m  
    Dim emiss As Double a|qsQ'1,;  
    Dim fname As String, fullfilepath As String !vqC+o>@  
    LsTffIP  
    'Option Explicit s@@1 *VQ  
    $Xf(^K  
    Sub Main !k&)EWP?  
        'USER INPUTS F'W> 8  
        nx = 31 4('JwZw\!  
        ny = 31 TUTe9;)  
        numRays = 1000 [#b2%G1  
        minWave = 7    'microns  &"S/Lt  
        maxWave = 11   'microns S7sb7c'4 k  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 <0j{ $.  
        fname = "teapotimage.dat" :=!Mh}i  
    @)0 Y~A )  
        Print "" YMB~[]$V<  
        Print "THERMAL IMAGE CALCULATION" BQrL7y  
    xy^1US ,L1  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 ,;iA2  
    3'#%c>_  
        Print "found detector array at node " & detnode /tKGwX]y  
    ~<O,Vs_C/  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 h7W}OF_=y  
    tY_5Pz(@  
        Print "found differential detector area at node " & srcnode l)Mh2lA,=  
     rz  
        GetTrimVolume detnode, trm FmT `Oa>  
        detx = trm.xSemiApe SGf9U^ds  
        dety = trm.ySemiApe fPQ|e"?  
        area = 4 * detx * dety uLW/f=7 L  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety Jt=>-Spj  
        Print "sampling is " & nx & " by " & ny UxqWnHH.`  
    $WaZ_kt  
        'reset differential detector area dimensions to be consistent with sampling i?>Hr|  
        pixelx = 2 * detx / nx %C *^:\y  
        pixely = 2 * dety / ny mK\aI  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False h}6_ybmZ  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 $ KQ,}I  
    uBeNXOre  
        'reset the source power YmDn+VIg  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) K` (#K#n  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" >]/dOH,A  
     P\(30  
        'zero out irradiance array L8P 36]>  
        For i = 0 To ny - 1 m5gI~1(9  
            For j = 0 To nx - 1 mw+j|{[  
                irrad(i,j) = 0.0 .TN2s\:]jw  
            Next j Je~p%m#e;K  
        Next i OmNn,PCl8  
    qZsnd7o{l.  
        'main loop EAyukM2  
        EnableTextPrinting( False ) #s^s_8#&e  
    (j N]OE^  
        ypos =  dety + pixely / 2 <%?uYCD  
        For i = 0 To ny - 1 Lz6*H1~   
            xpos = -detx - pixelx / 2 /0\QL+^!  
            ypos = ypos - pixely BE4\U_]a3  
    rw*M&qg!z  
            EnableTextPrinting( True ) Czh8zB+r  
            Print i G"Pj6QUva  
            EnableTextPrinting( False ) e6m1NH4,  
    lC{L6&T  
    ~XQ$aRl&  
            For j = 0 To nx - 1 IUawdB5CB  
    qw0~ *0}  
                xpos = xpos + pixelx y:9?P~  
    )52#:27F  
                'shift source |Gc&1*$  
                LockOperationUpdates srcnode, True 1.dX)^\  
                GetOperation srcnode, 1, op &#,v_B)a_E  
                op.val1 = xpos m)k-uWc$C  
                op.val2 = ypos [x$; XqA  
                SetOperation srcnode, 1, op k+txb?  
                LockOperationUpdates srcnode, False 3N3*`?5c<  
    AS q`)Rz  
    'raytrace ?o>6S EGW  
                DeleteRays '\'7yN'  
                CreateSource srcnode Cz[5Ug'V  
                TraceExisting 'draw )<Ob  
    J ~'~[,K  
                'radiometry s kY0\V  
                For k = 0 To GetEntityCount()-1 4w9F+*-  
                    If IsSurface( k ) Then E6Q91Wz9f  
                        temp = AuxDataGetData( k, "temperature" ) ' tSnH&c  
                        emiss = AuxDataGetData( k, "emissivity" ) v?{vg?vI  
                        If ( temp <> 0 And emiss <> 0 ) Then 4K'|DO|dH  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) C=s((q*  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) 2D_6  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi :SdIU36  
                        End If .W-=x,`hY4  
    4V>vg2 d  
                    End If ^T+<!k  
    0@w&J9yG  
                Next k vhX-Qkt}  
    !8Y3V/)NU  
            Next j w&9F>`VET  
    qs "s/$  
        Next i 3U>S]#5}  
        EnableTextPrinting( True ) `43vxcMg  
    @21u I{  
        'write out file 4a1BGNI%SW  
        fullfilepath = CurDir() & "\" & fname |&(H^<+Xp  
        Open fullfilepath For Output As #1 k=FcPF"  
        Print #1, "GRID " & nx & " " & ny QdirE4W  
        Print #1, "1e+308" E4hq}  
        Print #1, pixelx & " " & pixely '%:5axg?]  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 WEps.]s  
    j}"]s/= 6  
        maxRow = nx - 1 [(!Q-8  
        maxCol = ny - 1 "wF*O"WQo  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) PQQgDtiH  
                row = "" Y'?Izn b  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) VDPxue  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string ?3n=m%W,J*  
            Next colNum                     ' end loop over columns Fz{o-4  
    s^obJl3  
                Print #1, row }@3$)L%n_u  
    [;Vi~$p|Eo  
        Next rowNum                         ' end loop over rows +<H !3sW  
        Close #1 z=u~]:.1O  
    gca|?tt  
        Print "File written: " & fullfilepath +Z )`inw  
        Print "All done!!"  I8:"h  
    End Sub 3SmqXPOw  
    IM$ 'J  
    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: z/pDOP Ku  
    B>1M$3`E  
    ozT._ C  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 XL=2wh  
      
    < JGYr 4V  
    K~P76jAe$  
    打开后,选择二维平面图: 4 3}qaf[  
    u|(aS^H=q  
     
    分享到
    离线谭健
    发帖
    6887
    光币
    24360
    光券
    0
    只看该作者 1楼 发表于: 2023-04-07
    感谢分享 cKaL K#~