-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-12-04
- 在线时间1893小时
-
-
访问TA的空间加好友用道具
|
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在探测器上,并显示其热成像图。 =W"9a\m p5#UH 成像示意图 .x_F4 #Ka 首先我们建立十字元件命名为Target $|K-wN[ 0>yuB gh 创建方法: V-lp';bD ms#|Yl1/| 面1 : n8o(>?Kw 面型:plane ,p6o "- 材料:Air "T.Qb/97@ 孔径:X=1.5, Y=6,Z=0.075,形状选择Box ' [%?j?2r -|GX]jx(Y >uwd3XW5 辅助数据: w5q'M 首先在第一行输入temperature :300K, 5)i+x- emissivity:0.1; IhXP~C6 ^@;P -0Sy Z(BZGO< 面2 : ?;DzWCL~9 面型:plane ZQ[ s/ 材料:Air -fD W>]_ 孔径:X=1.5, Y=6,Z=0.075,形状选择Box _aw49ag; R
RnT.MU d>Ky(wS 位置坐标:绕Z轴旋转90度, GhW{6.^
4x_#
1 - j!K{1s[.y 辅助数据: V(F1i%9l g >uJU25)| 首先在第一行输入temperature :300K,emissivity: 0.1; [ip}f4K b#Vm;6BHD1 OGPrjL+ Target 元件距离坐标原点-161mm; 9O-*iK }kMKA.O" ZC9S0Z 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 }XfRKGQw **F-#", ]_2<uK}fg 探测器参数设定: :CG;:( | 9C| -|mo 在菜单栏中选择Create/Element Primitive /plane _q`f5*Z[ #<yKG \X? $#FA/+<&$ @"0n8y 7QHrb'c Y{2L[5_1 元件半径为20mm*20,mm,距离坐标原点200mm。 :@J.!dokF HQ^:5XH 光源创建: wZ/b;%I! La\|Bwx 光源类型选择为任意平面,光源半角设定为15度。 i 8:^1rHp) \0z<@)r+AJ w>&g' 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。 O:+?:aI@ _tfi6UQ&lY 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%pdqo`. 4?l:.\fB: nh>lDfJV< 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。 ykNPKzW: 77;|PKE / 创建分析面: ;b^"b{ 6<9gVh<=w C^ Oy.s 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。 =7-@&S=?s YT)@&HaF lNB<_SO 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。 |%fM*F^7/ DTCOhUIV FRED在探测器上穿过多个像素点迭代来创建热图 ^qV6khg 9^^:Y3j 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。 hmJa1fw= 将如下的代码放置在树形文件夹 Embedded Scripts, 9l}G{u9a %Q|Hvjk=E !k8j8v& 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。 &U
yQ<O> $J]o\~Z J 绿色字体为说明文字, Cm#[$T@C >:f&@vwm '#Language "WWB-COM"
|:5[` 'script for calculating thermal image map HI{IC!6 'edited rnp 4 november 2005 @fI2ZWN| {S5j; 'declarations qp2&Z8S\D Dim op As T_OPERATION zN,2
(v" Dim trm As T_TRIMVOLUME 8o!LgT5 Dim irrad(32,32) As Double 'make consistent with sampling =X=m_\=~@ Dim temp As Double \Wf1b8FW Dim emiss As Double a<v!5\dq! Dim fname As String, fullfilepath As String >+2gAO! iU?xw@WR 'Option Explicit zC_@wMWB n^%",*8gD* Sub Main 1ika' 'USER INPUTS M]A!jWtE nx = 31 i"
>kF@]c8 ny = 31 ZGQz@H5 numRays = 1000 YY
8vhnw minWave = 7 'microns d`4F maxWave = 11 'microns E>k!d'+tb sigma = 5.67e-14 'watts/mm^2/deg k^4 Un\
T}
c fname = "teapotimage.dat" lAo S 9w 9u] "($ Print "" /@+[D{_Fw Print "THERMAL IMAGE CALCULATION" qBqh>Wo 3}2a3) detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 ')1p ]%I|C++0 Print "found detector array at node " & detnode Ys@G0}\3G x4;ndck%U srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 UGK,+FN E{}Vi>@V? Print "found differential detector area at node " & srcnode {Zrf>ST .?*TU~S GetTrimVolume detnode, trm #lO~n.+P detx = trm.xSemiApe lW3wmSWn% dety = trm.ySemiApe 6:qh%ZR area = 4 * detx * dety 0'~Iv\s Print "detector array semiaperture dimensions are " & detx & " by " & dety g0A,VX:2 Print "sampling is " & nx & " by " & ny _4~q&?}V PR~9*#"v.. 'reset differential detector area dimensions to be consistent with sampling Q'Vejz/ pixelx = 2 * detx / nx +<w\K* pixely = 2 * dety / ny {qL}:ha? SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False +/DT#}JE Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 QW_W5|_ -9^A,vX 'reset the source power Ygfv? SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) )9z3T>QW Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" pX]"^f1?O wvlM( 'zero out irradiance array Eg 8rgiU For i = 0 To ny - 1 (bON[6OGm For j = 0 To nx - 1 >^zbDU1wT irrad(i,j) = 0.0 .yb=I6D;<3 Next j ?$Ii_. Next i IhPX/P )m.U"giG++ 'main loop ioJr2wq6 EnableTextPrinting( False ) *1CZRfWI 0=V
-{ ypos = dety + pixely / 2 d{:0R9 For i = 0 To ny - 1 |7%#z~rT xpos = -detx - pixelx / 2 i'`[dwfS ypos = ypos - pixely dI)
9@UL ,'>O#kD
EnableTextPrinting( True ) p@jwHlX Print i _ 68{
{. EnableTextPrinting( False ) p5JRG2zt E% d3}@ GLr7sack For j = 0 To nx - 1 T7~Vk2o%( D);w)` xpos = xpos + pixelx m+9~f_} C7xmk;c
w 'shift source #D|n6[Y'.t LockOperationUpdates srcnode, True i4H,Ggb GetOperation srcnode, 1, op :C9vs op.val1 = xpos D%!GY1wdn op.val2 = ypos %#iu SetOperation srcnode, 1, op h#(J6ht LockOperationUpdates srcnode, False :FX|9h p~f=0K 'raytrace aYws{Vii DeleteRays C9L_`[9DO CreateSource srcnode "ot#g" TraceExisting 'draw >m#bj^F\ *5d6Q 'radiometry ky=h7#wdv- For k = 0 To GetEntityCount()-1 eH^~r{{R If IsSurface( k ) Then M}x]\#MMY temp = AuxDataGetData( k, "temperature" ) {W$K@vuV;? emiss = AuxDataGetData( k, "emissivity" ) h@%a+ 6b? If ( temp <> 0 And emiss <> 0 ) Then 2+cpNk$ ProjSolidAngleByPi = GetSurfIncidentPower( k ) SmVL?wf frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) = ow=3Ku irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi HMqR%A End If V2LvE.Kj 4rrR;V"} End If ]3]=RuQK2 *I9O+/, Next k s"B+),Jod )>I-j$%=2 Next j r>cN,C njckPpyb@ Next i @^Yr=d ba EnableTextPrinting( True ) VCQo3k5
{ {B[ }}wX$ 'write out file ubUVxYD? fullfilepath = CurDir() & "\" & fname 6QAhVg: A Open fullfilepath For Output As #1 f[wxt n'r Print #1, "GRID " & nx & " " & ny qB5.of[N! Print #1, "1e+308" ,)ZI&BL5 Print #1, pixelx & " " & pixely /_</m?&.U& Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 -rlCE-S y-N]{! maxRow = nx - 1 h]pz12Yf maxCol = ny - 1 bk:mk[ For rowNum = 0 To maxRow ' begin loop over rows (constant X) vX|5*T`( row = "" #*X\pjZ For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) UX%J?;g row = row & irrad(colNum,rowNum) & " " ' append column data to row string Fs&r^ [/b Next colNum ' end loop over columns ;Q,,i <.hutU*1 Print #1, row nYE%@Up '8=/v*j>? Next rowNum ' end loop over rows vn4z C Close #1 DB3qf>@? %"^8$A?>,k Print "File written: " & fullfilepath "{[\VsX|c Print "All done!!" ym_p49 End Sub H{hzw&dZ<P }CL7h;5N 3 在输出报告中,我们会看到脚本对光源的孔径和功率做了修改,并最终经过31次迭代,将所有的热成像数据以dat的格式放置于: mM.YZUX %rJ'DPs n
j2=}6 找到Tools工具,点击Open plot files in 3D chart并找到该文件 ?!y<%&U !cW!zP-B*p ($-m}UF\/ 打开后,选择二维平面图: dozC[4mF
fj'7\[nZ
QQ:2987619807 &%m%b5
|