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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。 ^7Lk-a7gp 8b7;\C~$p 成像示意图 2 5Q+1 首先我们建立十字元件命名为Target Lyr2(^#: Ir27ZP 创建方法: `E W!-v) frc{>u~t 面1 : D"cKlp-I6| 面型:plane %K?iNe 材料:Air jn$j^51`C 孔径:X=1.5, Y=6,Z=0.075,形状选择Box &hI>L f*<ps
o K6hfauWd[ 辅助数据: ,]7XMU3 首先在第一行输入temperature :300K, #W|!fILL emissivity:0.1; |{f~Ks% {2:d`fqD skR,-:"8 面2 : YBvd
q1 面型:plane /UHp [yod 材料:Air X2^_~<I{, 孔径:X=1.5, Y=6,Z=0.075,形状选择Box o,FUfO}F Vv4H:BK$ _CE9B e\ 位置坐标:绕Z轴旋转90度, .S!-e$EJ Pq?*C;D A"4@L*QV 辅助数据: k 4B_W ~<,Sh~Ana. 首先在第一行输入temperature :300K,emissivity: 0.1; -~O/NX W-XpJ\_ oLS7`+b$ Target 元件距离坐标原点-161mm; !M(:U,?B XWtiwf'K 7Z0/(V.- 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 hnzNP\$U] $XGtS$ kA^A mfba 探测器参数设定: )GJP_*Ab #
X/Q 在菜单栏中选择Create/Element Primitive /plane ?3jdg ]& s$GF 95^ J8;Okzb!L [Oy >R
i03gX<=* %v4ZGtKC@ 元件半径为20mm*20,mm,距离坐标原点200mm。 z+/LS5$ Q2c*.Y 光源创建: 9j#@p ETp'oh}? 光源类型选择为任意平面,光源半角设定为15度。 /9_#U#vhY pjN:Y] C[YnrI! 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。 &fSTR-8ev# 2xTT)9Tq* 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。 u+2Lm*M <xlm
K( r1Z<:}ZwK 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。 %
{Q-8w! <&U!N'CE 创建分析面: J^ ={} frqJN @^?XaU 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。 <AUWby," C3S`}o. ~lw<799F6 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。 uvB1VV4 `o
si"o9 FRED在探测器上穿过多个像素点迭代来创建热图 HmV />9 z+3 9ee 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。 m:{tgcE 将如下的代码放置在树形文件夹 Embedded Scripts, %MJ;Q?KB R0<< f] FT/amCRyT 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。 84M3c -3hCiKq 绿色字体为说明文字, jTSOnF}C~+ Uix{" '#Language "WWB-COM" "l,UOv c 'script for calculating thermal image map 9;KJr[FQV 'edited rnp 4 november 2005 &U&%ka<* f=I:DkR 'declarations 2c:f<>r0y Dim op As T_OPERATION ]}LGbv"`A Dim trm As T_TRIMVOLUME Ze
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g Dim irrad(32,32) As Double 'make consistent with sampling ($WE=biZ& Dim temp As Double {4rQ7J4Ux Dim emiss As Double CV^c",b_ Dim fname As String, fullfilepath As String ~7SH4Cr ^?"^Pmw
'Option Explicit z{?4*Bq U:lv^QPG Sub Main nq;#_Rkr 'USER INPUTS z\.1>/Z= nx = 31 D,rZ0?R ny = 31 ,{{SI numRays = 1000 XDLEVSly7 minWave = 7 'microns JSW&rn maxWave = 11 'microns slvq9, sigma = 5.67e-14 'watts/mm^2/deg k^4 gyus8#s T fname = "teapotimage.dat" c8DZJSO (5`T+pAsV Print "" 'sU)|W(3U Print "THERMAL IMAGE CALCULATION" _CdROo6I #`/QOTnm2c detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 9
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Ey, Print "found detector array at node " & detnode |9,UaA Y}.Ystem srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 F?4Sz# *fhX*e8y Print "found differential detector area at node " & srcnode GGE[{Gb9 }uQ${]&D GetTrimVolume detnode, trm aWaw&u detx = trm.xSemiApe lrys3 dety = trm.ySemiApe |:2c$zq area = 4 * detx * dety jA`a/vWu Print "detector array semiaperture dimensions are " & detx & " by " & dety Hj~O49%j& Print "sampling is " & nx & " by " & ny Lq04T0 y/R+$h(% 'reset differential detector area dimensions to be consistent with sampling /V^sJ($V$~ pixelx = 2 * detx / nx w0Ij'=: pixely = 2 * dety / ny <abKiXA" SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False E`)Qs[?Gk Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 t[2i$%NVM \4s;!R! 'reset the source power >saI+u'o SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) sh6(z?KP Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" 7/>a:02 %h+uD^^$ 'zero out irradiance array :s*>W$Wp4 For i = 0 To ny - 1 -P#nT 2 For j = 0 To nx - 1 og-]tEWA1 irrad(i,j) = 0.0 J
Jy{@[m Next j !Zs,-=^D Next i V^En8 ;BI)n]L 'main loop xNgt[fLpS EnableTextPrinting( False ) }1>atgq]w e&3#2_ ypos = dety + pixely / 2 :]c=pH For i = 0 To ny - 1 x/ I;nMY xpos = -detx - pixelx / 2 Yu3_=:
<C ypos = ypos - pixely ]{Ek[Av YMu) EnableTextPrinting( True ) }m_t$aaUc1 Print i kF-TG3 EnableTextPrinting( False ) ,qy&|4Jz uaxB -PZ hW%p#g; For j = 0 To nx - 1 7bT
/KLU ^<;w+%[MT xpos = xpos + pixelx _,Q[2gQ5N 3bts7<K= 'shift source %6 ]\^ LockOperationUpdates srcnode, True MPvWCPB GetOperation srcnode, 1, op RpN <= op.val1 = xpos 0yTQ{'Cc op.val2 = ypos HRHrSf7 SetOperation srcnode, 1, op ;*QN9T=0 LockOperationUpdates srcnode, False N84qcc `M rBav 'raytrace XRa#21pQ DeleteRays J wFned#T CreateSource srcnode ':sTd^V TraceExisting 'draw owMmCR hbnS~sva 'radiometry 'w6hW7"L For k = 0 To GetEntityCount()-1 CB]l[hM$ If IsSurface( k ) Then V}:'Xgp*N temp = AuxDataGetData( k, "temperature" ) w_H2gaQ emiss = AuxDataGetData( k, "emissivity" ) hVZo"XUb If ( temp <> 0 And emiss <> 0 ) Then %uuH^ A ProjSolidAngleByPi = GetSurfIncidentPower( k ) ^0Q'./A{& frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) czS7-Hh@ irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi :gaETr End If GZ"/k<~0 @g\;` #l End If 8^T2^gs gvo?([j-m Next k -fPT}v ai^t=
s Next j >)y$mc6 $WClpvVj Next i Y?t2,cm EnableTextPrinting( True ) 4cB&Hk %`oHemSy 'write out file `WlH*p)z9 fullfilepath = CurDir() & "\" & fname j"6:A Open fullfilepath For Output As #1 X~zRZ0 Print #1, "GRID " & nx & " " & ny mQ=sNZ-d] Print #1, "1e+308" m9Il\PoTq Print #1, pixelx & " " & pixely o}W;Co Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 4y>(RrVG P4[]qbfd, maxRow = nx - 1 BPiiexTV9 maxCol = ny - 1 GoL|iNW` For rowNum = 0 To maxRow ' begin loop over rows (constant X) @E(P9zQ/zy row = "" 19&)Yd1 For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) R9r)C{63S& row = row & irrad(colNum,rowNum) & " " ' append column data to row string F-tFet
Next colNum ' end loop over columns uAT/6@ 1=>2uYKR Print #1, row ()B7(Y o"4E+1qwM Next rowNum ' end loop over rows 6Wb!J>93 Close #1 Tplg2p%k {s9<ej~<R Print "File written: " & fullfilepath ]7l{g9?ZtV Print "All done!!" N5ci};? End Sub FSe5k5 ( mt*y]p? 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: EO"6Dq( 4`6< { d^y86pq. 找到Tools工具,点击Open plot files in 3D chart并找到该文件 _1\poAy =tHD 4I |
F8]Xnds 打开后,选择二维平面图: 1Df,a#,y" Cg7)S[zl
QQ:2987619807 _^-D _y
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