切换到宽版
  • 广告投放
  • 稿件投递
  • 繁體中文
    • 1373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
    6401
    光币
    26150
    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。 HQ^:5 XH  
    zX&wfE8T  
    成像示意图
    \0z<@)r+AJ  
    首先我们建立十字元件命名为Target w>&g'  
    )<_:%oB  
    创建方法: >C/O >g  
    !Z%pdqo`.  
    面1 : 4?l:.\fB:  
    面型:plane KHoDD=O  
    材料:Air 3| 0OW Jk  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box JvM:xy9  
    k Hh0&~ (  
    [\.@,Y0j  
    辅助数据: idNg&'   
    首先在第一行输入temperature :300K, n hGh5,  
    emissivity:0.1; pt~b=+bBm  
    U Kf0cU  
    cB}6{c$_sW  
    面2 : ;a`I8Fj  
    面型:plane Mgg m~|9)  
    材料:Air \(ju0qFqH  
    孔径:X=1.5, Y=6,Z=0.075,形状选择Box ^zR*s |1Q  
    I=&Kn@^  
    nH|7XY9"  
    位置坐标:绕Z轴旋转90度, g UA_&_  
    +P;&/z8i*g  
    ^ 4{"h  
    辅助数据: P yN{  
    ^(1S`z$  
    首先在第一行输入temperature :300K,emissivity: 0.1; jU=n\o=?  
    r*t\F& D  
    Y$ '6p."=  
    Target 元件距离坐标原点-161mm; wQN/MYF[  
    $WG<  
    ^MUvd  
    单透镜参数设定:F=100, bend=0, 位置位于坐标原点 ;g_<i_ *x#  
    *hkNJ  
    5VGr<i&A  
    探测器参数设定: <CGJ:% AY  
    zC_@wMWB  
    在菜单栏中选择Create/Element Primitive /plane n^%",*8gD*  
    N6%M+R/Q  
    td(4Fw||1y  
    ~3qt<"  
    #>O>=#Q  
    i3o;G"IcD  
    元件半径为20mm*20,mm,距离坐标原点200mm。 vXeI)vFK  
    +cC$4t0$^A  
    光源创建: 9M1UkS$`@  
    ,2lH*=m;  
    光源类型选择为任意平面,光源半角设定为15度。 obSLy Ed  
    nx@ h  
    )cYbE1=u8>  
    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。 /%i:(Ny  
    yPVK>em5  
    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 qp55U*  
     4,?ZNyl  
    CL<m+dW%*  
    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。 HHg[6aw  
    Hjc *W Tu  
    创建分析面: `6 ?.ihV  
    jQ9i<-zc  
    */A ~lR|  
    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。 )(l=_[1Z5  
    qt4^e7o  
    C}(9SASs%  
    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。  g\=e86  
    QLOcgU^  
    FRED在探测器上穿过多个像素点迭代来创建热图 D 4\ * ,w  
    pEX|zee  
    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。 D~7L~Q]xI  
    将如下的代码放置在树形文件夹 Embedded Scripts, ::8c pUc`f  
    \wxLt}T-Q  
    l$3YJ.n|s~  
    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。 9O\N K:2  
    ]%Z7wF</  
    绿色字体为说明文字, %S]g8O[}nl  
    GKa_6X_  
    '#Language "WWB-COM" 6'qu[ ~ }Q  
    'script for calculating thermal image map 2*}qQ0J  
    'edited rnp 4 november 2005 >PoVK{&y  
    1$1P9x@H  
    'declarations ^ 9FRI9?  
    Dim op As T_OPERATION tW} At  
    Dim trm As T_TRIMVOLUME 6;#Rd|  
    Dim irrad(32,32) As Double 'make consistent with sampling B dKD%CJ[  
    Dim temp As Double pDM95.6   
    Dim emiss As Double rxQ&N[r2  
    Dim fname As String, fullfilepath As String >!%F$$  
    <^fvTb&*  
    'Option Explicit f'%Pkk  
    ^>m"j6`h,  
    Sub Main K5EU?J&  
        'USER INPUTS ":V,&o9n  
        nx = 31 HAc1w]{(  
        ny = 31 ,BE4z2a  
        numRays = 1000 52#Ac;Y  
        minWave = 7    'microns gPw{'7'U  
        maxWave = 11   'microns SRek:S,  
        sigma = 5.67e-14 'watts/mm^2/deg k^4 ]Ofs, U^  
        fname = "teapotimage.dat" Qs7*_=+h  
    B8.uzX'p  
        Print "" #7|73&u(  
        Print "THERMAL IMAGE CALCULATION" feG#*m2g  
    )k6kK}  
        detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 pT'jX^BU  
    C5x*t Q|  
        Print "found detector array at node " & detnode ;T*o RS  
    `$i/f(t6`  
        srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 C9L_`[9DO  
    "ot# g"  
        Print "found differential detector area at node " & srcnode >m# bj^F\  
    *5d6Q   
        GetTrimVolume detnode, trm ky=h7#wdv-  
        detx = trm.xSemiApe eH^~r{{R  
        dety = trm.ySemiApe M}x]\#MMY  
        area = 4 * detx * dety {W$K@vuV;?  
        Print "detector array semiaperture dimensions are " & detx & " by " & dety h@%a+6b?  
        Print "sampling is " & nx & " by " & ny rWNywxnT  
    SmVL?wf  
        'reset differential detector area dimensions to be consistent with sampling = ow=3Ku  
        pixelx = 2 * detx / nx HMqR%A  
        pixely = 2 * dety / ny V2LvE.Kj  
        SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False 4rrR;V"}  
        Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 ]3]=RuQK2  
    *I9O+/,  
        'reset the source power s"B+),Jod  
        SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) )>I-j$%=2  
        Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" r>cN,C  
    'T(@5%Db  
        'zero out irradiance array 5[Uv%A?H#_  
        For i = 0 To ny - 1 yoG*c%3V?  
            For j = 0 To nx - 1 BV=~ !tsl  
                irrad(i,j) = 0.0 'b:e8m  
            Next j S pk8u4  
        Next i 6|Xe ],u  
    ]-cSTtO  
        'main loop D hD^w;f]  
        EnableTextPrinting( False ) hO; XJyv  
    -mw`f)?Ev  
        ypos =  dety + pixely / 2 R'Uf#.  
        For i = 0 To ny - 1 aKz:hG  
            xpos = -detx - pixelx / 2 I`;SA~5  
            ypos = ypos - pixely y~^-I5!_ u  
    odWK\e  
            EnableTextPrinting( True ) Fs&r ^ [/b  
            Print i 3<HZ)w^B  
            EnableTextPrinting( False ) :*Y2na)qQ  
    V6Y0#sTU  
    nM|F MK^  
            For j = 0 To nx - 1 e%C_>  
    u(i=-PN_<  
                xpos = xpos + pixelx (D0\uld9  
    1$H<Kjsm  
                'shift source -tfUkGdx;l  
                LockOperationUpdates srcnode, True yt<h!k$ _P  
                GetOperation srcnode, 1, op GglGFXOL-  
                op.val1 = xpos E8BIb 'b;  
                op.val2 = ypos qHn X)  
                SetOperation srcnode, 1, op quRTA"!E  
                LockOperationUpdates srcnode, False 1>Q4&1Vn  
    )+|Y;zC9  
    raytrace ty'/i!/\  
                DeleteRays Kr;;aT0P  
                CreateSource srcnode Xy r'rm5+b  
                TraceExisting 'draw 0o!mlaU#  
    @qEUp7W.?  
                'radiometry 9BAvE\o0  
                For k = 0 To GetEntityCount()-1  QJ!2Vw4K  
                    If IsSurface( k ) Then p<3<Zk 7~0  
                        temp = AuxDataGetData( k, "temperature" ) ~LQzt@G4  
                        emiss = AuxDataGetData( k, "emissivity" ) 1) 5$,+~lL  
                        If ( temp <> 0 And emiss <> 0 ) Then DTG-R>y^  
                            ProjSolidAngleByPi = GetSurfIncidentPower( k ) k-^le|n9  
                            frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) 51Vqbtj^  
                            irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi V-eRGSx  
                        End If y%?'<j  
    .><-XJ  
                    End If t&Q(8Hz  
    #nw+U+qL  
                Next k fUr%@&~l^  
    5?Pf#kq  
            Next j qw1W }+~g  
    "By$!R-&  
        Next i '$),i>6gJ  
        EnableTextPrinting( True ) uehu\umt=  
    )ZI#F]  
        'write out file `jSegG'  
        fullfilepath = CurDir() & "\" & fname Vl;zd=  
        Open fullfilepath For Output As #1 d::9,~  
        Print #1, "GRID " & nx & " " & ny Wf^ sl  
        Print #1, "1e+308" t+_\^Oa)  
        Print #1, pixelx & " " & pixely `!$6F:d_l  
        Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 i I`vu  
    U!NuiKaQ26  
        maxRow = nx - 1 e9HL)=YP  
        maxCol = ny - 1 No)0|C8:  
        For rowNum = 0 To maxRow                    ' begin loop over rows (constant X) XRO(p`OE-  
                row = "" *@p"  
            For colNum = maxCol To 0 Step -1            ' begin loop over columns (constant Y) %}e['d h  
                row = row & irrad(colNum,rowNum) & " "     ' append column data to row string >lKu[nq;  
            Next colNum                     ' end loop over columns `S0`3q}L3%  
    *CPpU|  
                Print #1, row n_Qua|R  
    {Wi*B(  
        Next rowNum                         ' end loop over rows Np%Q-T\  
        Close #1 ~_Fx2T:X  
    JsNj!aeU%  
        Print "File written: " & fullfilepath } C:i0Q  
        Print "All done!!" Il Qk W<  
    End Sub OTE,OCB[  
    6 &0r/r  
    在输出报告中,我们会看到脚本对光源的孔径和功率做了修改,并最终经过31次迭代,将所有的热成像数据以dat的格式放置于: j#~~_VA~  
    ^b$_I31D  
    Wy}^5]R0E  
    找到Tools工具,点击Open plot files in 3D chart并找到该文件 2x9.>nwhb  
      
    ;mT}Q;F#  
    -gm5E qi  
    打开后,选择二维平面图: ZE-vroh  
    qxDMDMN  
     
    分享到