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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。 ,1YnWy* L_rKVoKjt 成像示意图 jbqhNsTNK 首先我们建立十字元件命名为Target X=p~`Ar M{ :>[;XT< 创建方法: ?_F,HhQ TvWhy`RQ 面1 : <Zc: 面型:plane ?)cNe:KY 材料:Air Ir*,fyl 孔径:X=1.5, Y=6,Z=0.075,形状选择Box G1"=}Wt` xe:
D7 3a4 ]{ 辅助数据: w%1B_PyDg 首先在第一行输入temperature :300K, Cse@>27s emissivity:0.1; N+?kFob iD|"} }01 'H`_Z e< 面2 : 9k^;]jE 面型:plane rY>{L6d 材料:Air %&"_=Lc 孔径:X=1.5, Y=6,Z=0.075,形状选择Box 1px:(8]{ VB 8t"5 BcT|TX+ct 位置坐标:绕Z轴旋转90度, v5t`?+e qx"?')+ NDRk%_Eu( 辅助数据: *Df|D/,WE [j5^Zb&0 首先在第一行输入temperature :300K,emissivity: 0.1; MWCP/~>a2 IjDG `\&qk)ZP Target 元件距离坐标原点-161mm;
,h1r6&MEY +MQf2|-- zu}h3n5 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 '8>#`Yba t9PS5O ; 2D
MH@U2 探测器参数设定: Lvc*L6 1C=}4^Pu 在菜单栏中选择Create/Element Primitive /plane f$k#\=2% XTyn[n QH4nb h4 "_C^Bc y-"*[5{W 5RTAM 元件半径为20mm*20,mm,距离坐标原点200mm。 >U9!KB FI~)ZhE)] 光源创建: b9OT~i=S| ~]A';xH& 光源类型选择为任意平面,光源半角设定为15度。 7BF't!-2F ;'pEzz?k" C
did*hxJ 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。 P7E}^y`e RN3w{^Ll 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。 ,_Fq*6 qB7.LR*' S]1+tj 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。 [ WZ<d^L f b_tda",} 创建分析面: "^<:7 _Y FWdSpaas Q J
C1T033 r 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。 &.o}(e:] n\*>mp) G+'MTC_ 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。 GwwxSB&y !hFb< FRED在探测器上穿过多个像素点迭代来创建热图 XT= #+ t22BO@gt74 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。 KE16BjX@ 将如下的代码放置在树形文件夹 Embedded Scripts, _ZD)#? rem&F'x0V X\
\\RCp 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。 ui7 0| \9i.dF 绿色字体为说明文字, $1\<>sJH
ozkN&0 '#Language "WWB-COM" +tkd($// 'script for calculating thermal image map JeUFCWm 'edited rnp 4 november 2005 Nf0b?jn- $|6Le;
K 'declarations HC4ad0Gs+{ Dim op As T_OPERATION cGsxfwD Dim trm As T_TRIMVOLUME xHykU;p@ Dim irrad(32,32) As Double 'make consistent with sampling O`t ]# Dim temp As Double k'%c| kx8U Dim emiss As Double xJ>hN@5}i Dim fname As String, fullfilepath As String Fdu0?H2TL G5=(3 V% 'Option Explicit Zi@?g IiX 9qQ_#$Vv Sub Main -1S+fUkiK/ 'USER INPUTS ID'@}69.S nx = 31 #B`"B ny = 31 jDgiH} numRays = 1000 $./JA)` minWave = 7 'microns :XBeGNI*# maxWave = 11 'microns y
@Y@"y sigma = 5.67e-14 'watts/mm^2/deg k^4 4p>@UB&U fname = "teapotimage.dat" 1.yw\ZC\ og.dYs7W4 Print "" z
O$SL8U Print "THERMAL IMAGE CALCULATION" *[W! ng Ao`9 fI#q detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 ^;W,:y& # dW$"u Print "found detector array at node " & detnode 6$)Yqg`X }Ss#0Gee srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 O%(:8nIgZ fgn*3 pg Print "found differential detector area at node " & srcnode e#kPf 'gL ./5|i*ow GetTrimVolume detnode, trm #1u4Hi(x5 detx = trm.xSemiApe @%ChPjN dety = trm.ySemiApe ?h
K+h .{ area = 4 * detx * dety R\0]\JEc Print "detector array semiaperture dimensions are " & detx & " by " & dety wvT!NN
K2 Print "sampling is " & nx & " by " & ny ~O@V;y UTin0k 'reset differential detector area dimensions to be consistent with sampling 0~Yg={IKhK pixelx = 2 * detx / nx RF g$N@g, pixely = 2 * dety / ny 4y
582u6^ SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False GsqrKrbJ Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 HX+'{zm] `j4ukOnG 'reset the source power z6'zNM7M SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) )]>=Uo Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" h5Qxa$Oq ZwO&G\A^ 'zero out irradiance array @] )a For i = 0 To ny - 1 G-M!I`P For j = 0 To nx - 1 ':o.vQdJ irrad(i,j) = 0.0 x3wyIio* Next j K Qub%`n Next i ZW+{<XTof4 QnaMjDh$6 'main loop 4"l(rg EnableTextPrinting( False ) `'Z ;+h] )_xM)mH ypos = dety + pixely / 2 nV:.-JR For i = 0 To ny - 1 lmr{Ib2a xpos = -detx - pixelx / 2 H[]j6D ypos = ypos - pixely jn)~@~c eSa ]6 EnableTextPrinting( True ) xOTm-Cm9L Print i ?>RJ8\Sj EnableTextPrinting( False ) 8.Y6r [.Kia
> 2{+\\.4Evk For j = 0 To nx - 1 .~W7{SY[ wQM(Lm#Q xpos = xpos + pixelx VEb}KFyP %@H;6
'shift source %I6iXq# LockOperationUpdates srcnode, True Q
CfA3* GetOperation srcnode, 1, op %0:
('' op.val1 = xpos &h4(lM op.val2 = ypos oh& PQ{ SetOperation srcnode, 1, op *e_ /D$SC LockOperationUpdates srcnode, False |!57Z4X !R)v2Mk| 'raytrace )JuD ! DeleteRays ^BNg^V. CreateSource srcnode ? 76jz>;b TraceExisting 'draw ~(I\O?k>H LAMTf"a 'radiometry 6wnfAli. For k = 0 To GetEntityCount()-1 RMLs(?e If IsSurface( k ) Then p_P'2mf temp = AuxDataGetData( k, "temperature" ) Rfa1v*( emiss = AuxDataGetData( k, "emissivity" ) d['BtVJ If ( temp <> 0 And emiss <> 0 ) Then 17<\Q(YQ= ProjSolidAngleByPi = GetSurfIncidentPower( k ) J
tYnBg?[E frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) / x$O6gi irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi <k< End If 'Ur$jW 5<ery~q End If s\>$ K%!H? D}\%
Q # Next k s)ZL`S?</ 4\Q ?4ZX Next j O]^E%;(]}i kCN9`9XI{ Next i bS*
"C,b~s EnableTextPrinting( True ) SC86+
;znIY&Z 'write out file ->K*r\T fullfilepath = CurDir() & "\" & fname &*MwKr<y Open fullfilepath For Output As #1 Ej6vGC., Print #1, "GRID " & nx & " " & ny FeSe^ ^dW Print #1, "1e+308" EkjO4=~UC Print #1, pixelx & " " & pixely @uT\.W:Q2 Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 [gH
vI a7OD%yQ maxRow = nx - 1 0QEVL6gw maxCol = ny - 1 OU0\xx1/ For rowNum = 0 To maxRow ' begin loop over rows (constant X) WBTX~%*U row = "" hua{g_ For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) XY0Gjo0 row = row & irrad(colNum,rowNum) & " " ' append column data to row string )ZNH/9e/ Next colNum ' end loop over columns I.q nA QXgh[9wG Print #1, row 3{]i| 1&j mv<z%y?Oj Next rowNum ' end loop over rows 8BLtTpu Close #1 9:YiLoz? m:Z=: -x Print "File written: " & fullfilepath Ngh9+b6[ Print "All done!!" <P}{0Y~@*W End Sub oACuI|b l_+s$c 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: GaM#a[p (j}"1 )Q6R6xW 找到Tools工具,点击Open plot files in 3D chart并找到该文件 >8>`- F/&Z1G. >JrQS"[u 打开后,选择二维平面图: OYy %aA}h BE}lzn=sF
QQ:2987619807 ']A+wGR&r
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