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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。 ,k=1'7d RD1N@sHDKc 成像示意图 R qnT* 首先我们建立十字元件命名为Target uOU?-WtPz <.6bni
) 创建方法: gs?=yNL eq<giHJM 面1 : 72;4 面型:plane ud}B#{6 材料:Air XC NM 孔径:X=1.5, Y=6,Z=0.075,形状选择Box :p6.v>s8 N=hhuKt] f:)%+)U<Xm 辅助数据: I<v:xTor 首先在第一行输入temperature :300K, 9"%ot=) emissivity:0.1; SA1|7 Q
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>\ 面2 : =%UX"K` 面型:plane #4Z]/D2G 材料:Air d
6$,N| 孔径:X=1.5, Y=6,Z=0.075,形状选择Box (sHvoE^q- UCv9G/$ M1sR+e$" 位置坐标:绕Z轴旋转90度, 6n}5>GSF &-s/F` nWd]P\a'V 辅助数据: 2:>|zmh_ [p7cgHSMt 首先在第一行输入temperature :300K,emissivity: 0.1; K/OE;;<IA K.{:H4_
eC71;" Target 元件距离坐标原点-161mm; _r6aLm2n hj8S# pjI<
cQ& 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 HU='Hk! 4jyDM68i O_n) 2t(c? 探测器参数设定: T9,T'y>BD Sjogv 在菜单栏中选择Create/Element Primitive /plane |D
?}6z |KM<\v(A{ R>05MhA+ .^Z^L F q!5 *)nw" /J-:?./ 元件半径为20mm*20,mm,距离坐标原点200mm。 LZ"yMnhOf $d[ xSwang 光源创建: T<\!7RnLc B<`'h 光源类型选择为任意平面,光源半角设定为15度。 iHp@R-g Xw|t.0 z
g '1T2t 我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 tk"+PTGJT 5,pKv 我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线。 99<0xN(25 XehpW}2\ vXio /m 功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 )kq3q5*_ b)5z'zQu 创建分析面: ns{BU->f %Q0J$eC ?4]#gCks 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。 oZY2K3J) R-8/BTls7 N0D)d 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。 j\ dY k>N >_{\ FRED在探测器上穿过多个像素点迭代来创建热图 h7EKb-@ c]y"5;V8 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。 YRkp(}*!\ 将如下的代码放置在树形文件夹 Embedded Scripts, #\Q{?F!4 GCf3'u J5J$qCJq 打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 |Bv?!
sjf X CjYm 绿色字体为说明文字, :OF:(,J
_>G=v! '#Language "WWB-COM" 3Mnm2*\ 'script for calculating thermal image map /<HEcB 'edited rnp 4 november 2005
O N(H7 .Q,IO CHk 'declarations HlkG^:) Dim op As T_OPERATION rt7Ma2tK Dim trm As T_TRIMVOLUME `o9vE0^T< Dim irrad(32,32) As Double 'make consistent with sampling 4)o_gm~6c4 Dim temp As Double z)Y<@2V*C Dim emiss As Double =ZsM[wd Dim fname As String, fullfilepath As String \~(ww3e sGf\!w 'Option Explicit 'wo[iNy[ Wp0e?bK_ Sub Main x4PH-f-7 'USER INPUTS uc%
&g nx = 31 `Z3Qx~fx ny = 31 /\%K7\ numRays = 1000 b6IYo!3 minWave = 7 'microns ZWC-<QO"< maxWave = 11 'microns +TzF*Np sigma = 5.67e-14 'watts/mm^2/deg k^4 )\:cL GM
fname = "teapotimage.dat" Pez 7HKW: C-;y#a) Print "" TJ:B_F*bSk Print "THERMAL IMAGE CALCULATION" >H@
zP8 #?xhfSgr detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 &CvNNDgrJ 00') Ol& Print "found detector array at node " & detnode Lp; {&=PIo _Ee`Uk srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 &^ sgR$m vG(Gs=.U Print "found differential detector area at node " & srcnode Y$%/H"1bk SR9Cl GetTrimVolume detnode, trm r( _9_%[ detx = trm.xSemiApe $XFiH~GI dety = trm.ySemiApe 5!ll
#/ {` area = 4 * detx * dety |kvom 4 T Print "detector array semiaperture dimensions are " & detx & " by " & dety EDR;" G(N Print "sampling is " & nx & " by " & ny 7$(>Z^ Em $73j*@EQA 'reset differential detector area dimensions to be consistent with sampling 8>Xyz`$kH pixelx = 2 * detx / nx Do7&OBI~ pixely = 2 * dety / ny Z!TLWX" SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False K2T&U$, Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 `.f<RVk- B2~KkMF 'reset the source power K/Q^8%Z SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) G9s: Wp Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" .Od.lxz"mp PaF`dnJ 'zero out irradiance array N|c;Qzl For i = 0 To ny - 1 4h>Dpml For j = 0 To nx - 1 ;z;O}<8s irrad(i,j) = 0.0 4K82%P9a Next j G#ov2 Next i d`LBFH, SxLu< 'main loop *%L:soM'Ll EnableTextPrinting( False ) .OM m"RtK f&glY`s# ypos = dety + pixely / 2 dxkq* For i = 0 To ny - 1 ANEW^\ xpos = -detx - pixelx / 2 A-\OB
Nh ypos = ypos - pixely B&&:A4 Hu|;cbK EnableTextPrinting( True ) n7`R+4/s Print i K!6k< EnableTextPrinting( False ) /
%}Xiqlrd S[rz=[7{ l5ww-#6Z For j = 0 To nx - 1 12;"=9e! Tj}H3/2 xpos = xpos + pixelx =$6z1] ;3 RiC1lCE 'shift source :R+}[|FV LockOperationUpdates srcnode, True e&zZr]vs]l GetOperation srcnode, 1, op V|3}~(5= op.val1 = xpos _,:gSDW| op.val2 = ypos iJE
$3 SetOperation srcnode, 1, op W'x/Kg,w- LockOperationUpdates srcnode, False A{mv[x-XN ohqi4Y!j/~ 'raytrace -@{5
u d DeleteRays \EF^Ag CreateSource srcnode s86Ij>VLf TraceExisting 'draw t<5$85Y~ Jylav: 'radiometry Pu dIb|V2 For k = 0 To GetEntityCount()-1 n}(/>?/ If IsSurface( k ) Then m[6?v;w temp = AuxDataGetData( k, "temperature" ) VWqmqR% emiss = AuxDataGetData( k, "emissivity" ) <eP`Lu" If ( temp <> 0 And emiss <> 0 ) Then c8!q_H~ ProjSolidAngleByPi = GetSurfIncidentPower( k ) zil^^wT0J frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) oUrNz#U irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi &@CcH_d* End If R&Y+x;({ rnW(<t" End If \^O&){q(9 %fB]N Next k {%W'Zx rEEoR'c6 Next j <7-:flQz~ (Tt\6- Next i W8{g<.
/ EnableTextPrinting( True ) : p# 5nYi #!="b8F 'write out file , TL8` fullfilepath = CurDir() & "\" & fname -?L~\WJAL Open fullfilepath For Output As #1 gXZl3 Print #1, "GRID " & nx & " " & ny m{T:<:q~ Print #1, "1e+308" J?VMQTa/+ Print #1, pixelx & " " & pixely ?`ETlFtD4 Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 h=tzG KI Yxik.S+G maxRow = nx - 1 Aw#@}TGT maxCol = ny - 1 @I_!q* For rowNum = 0 To maxRow ' begin loop over rows (constant X) 6
axe row = "" Zi'}qs$v For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) A=8%2UwI row = row & irrad(colNum,rowNum) & " " ' append column data to row string o~<ith$A* Next colNum ' end loop over columns 9 Z,K F/33#
U Print #1, row E6+c{4 1B 6! `^}4 Next rowNum ' end loop over rows >1luLp/,$ Close #1 *Ae>
,LyE )b AO A Print "File written: " & fullfilepath {vCB$@/o Print "All done!!" Lg6;FbY? End Sub KV&4Ep# `^_c&y K 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: C8dC_9 g~ubivl2 ;5S'?fj 找到Tools工具,点击Open plot files in 3D chart并找到该文件 :Y4m3| i`k{}!F #Y|t,x; 打开后,选择二维平面图: oUSv)G.zb _=Y?' gHH
QQ:2987619807 2Kg-ZDK8
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