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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。 Cg\)BHv~ Rw=E_q{ 成像示意图 Joo)GIB 首先我们建立十字元件命名为Target W6/p-e5y "u]Fl+c 创建方法: Uus)2R7 awW\$Q 面1 : +4p;4/= 面型:plane +bd{W]={ 材料:Air 5F+ f '~ 孔径:X=1.5, Y=6,Z=0.075,形状选择Box ?#c@Ag% ~t3?er& R l3|>*szX 辅助数据: +~k,4 首先在第一行输入temperature :300K, 9C~GL,uKs emissivity:0.1; <:7e4# \*"0wR;[K K~%5iVO~\ 面2 : ,F9wc<V8 面型:plane W2(=m!:U 材料:Air ~HI0<;r=eL 孔径:X=1.5, Y=6,Z=0.075,形状选择Box ZU@jtqq cCKda3v!O `/Jr8J_ 位置坐标:绕Z轴旋转90度, %LlKi5u] g#3x)97Z ?iO^b.'I# 辅助数据: 4GejT(U I}0- 首先在第一行输入temperature :300K,emissivity: 0.1; p
8Hv7* AG%es0D[H ;ypO' Target 元件距离坐标原点-161mm; W&[9x%Ba c+XR }4`YdN 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 (X'K)*G# (8F?yBu uHh2>Px 探测器参数设定: (P]^5D >Nqkz?67 在菜单栏中选择Create/Element Primitive /plane =n?@My?; #!j&L6 [beuDZA ~;a* Oxt \aRB k)_#u;qmG 元件半径为20mm*20,mm,距离坐标原点200mm。 Y{{,62D &G,v*5N8$K 光源创建: t?&ajh ;yoq/ 光源类型选择为任意平面,光源半角设定为15度。 n8C {Okr \05C'z3] aa3YtNpP 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。 7cSvAX0Z. :P'5_YSi 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。 TJa%zi BNLall TQfY%GKg( 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。 Ho9*y3] wOSNlbQ5jl 创建分析面: $(hZw 16{;24 VJPP HJ[- 到这里元件参数设定完成,现在我们设定元件的光学属性,在前面我们分别对第一和第二面设定的温度和发射系数,散射属性我们设定为黑朗伯,4%的散射。并分别赋予到面一和面二。 t*$@QO VAz+J Cu5
- w 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。 EH%j$=@X RR9s%>^ FRED在探测器上穿过多个像素点迭代来创建热图 {GY$J<5= P|4a}SWU 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。 ^`9OA`2 将如下的代码放置在树形文件夹 Embedded Scripts, hTqJDP"&F HKf3eC AS398L 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。 .-
o,_eg1f q\G@Nn^ 绿色字体为说明文字, F U%b"gP^ fe,CY5B{ '#Language "WWB-COM" T~d';P 'script for calculating thermal image map !h;VdCCi# 'edited rnp 4 november 2005 U$%w"k7^( @:8|tJu8b 'declarations e&kg[jU Dim op As T_OPERATION &'j77tqOk Dim trm As T_TRIMVOLUME <aS1bQgaU Dim irrad(32,32) As Double 'make consistent with sampling A#{*A Dim temp As Double -A~<IyPt Dim emiss As Double F.6SX (x Dim fname As String, fullfilepath As String #YV;Gp(2h P^r8JhDJ 'Option Explicit "5FeP; #Ki@=* Sub Main Si(?+bda0c 'USER INPUTS B;$5*3D+ nx = 31 7KLq-u-8 ny = 31 xFh}%mwpt[ numRays = 1000 IbC)F> Dq minWave = 7 'microns ]y/:#^M+ maxWave = 11 'microns /fEXAk sigma = 5.67e-14 'watts/mm^2/deg k^4 xae7#d0 fname = "teapotimage.dat" F ry5v?22 `,z{7 0 Print "" mD:!"h/ Print "THERMAL IMAGE CALCULATION" 4D5)<3N=d' N_U
D7P1 detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 tVwN92*J c_i;' Print "found detector array at node " & detnode G5Nub9_*X dcsd//E srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 01b0;| Ki2_Nh>tM Print "found differential detector area at node " & srcnode {1mD(+pJ{ {$JIR}4S GetTrimVolume detnode, trm H}/1/5L detx = trm.xSemiApe A.Njn(z?Lz dety = trm.ySemiApe 'DPSM?]fA area = 4 * detx * dety x
:s-\>RcA Print "detector array semiaperture dimensions are " & detx & " by " & dety )deuB5kz Print "sampling is " & nx & " by " & ny OmW|\d PU Tu"](|I> 'reset differential detector area dimensions to be consistent with sampling uQ}kq7gd pixelx = 2 * detx / nx .#SWfAb2h pixely = 2 * dety / ny fQ@["b SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False k 'o?/ Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 Gvw el!6 -3C~}~$>` 'reset the source power kK(,FB SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) @W8RAS~ Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" asb")NfIm mi+I)b= 'zero out irradiance array q0o6%c:gW For i = 0 To ny - 1 *@< jJP4 For j = 0 To nx - 1 6N^FJCs irrad(i,j) = 0.0 4^
A\w Next j 6mZFsB Next i y}8j_r L))(g][; 'main loop S;
>_9 EnableTextPrinting( False ) e |!i1e! Yd9y8TqJ ypos = dety + pixely / 2 }6\p7n For i = 0 To ny - 1 oVs&r?\Z xpos = -detx - pixelx / 2 |1EM )zh6 ypos = ypos - pixely n#iL[
&/Aw 6w'^,V EnableTextPrinting( True ) u+N[Cgh Print i s;L7
_.hH@ EnableTextPrinting( False ) SI\zW[IL ~*RNJ Ha<(~qf For j = 0 To nx - 1 #u>JCPz \;~>AL* xpos = xpos + pixelx 7@:uVowQ w%htY.- 'shift source Gg/K LockOperationUpdates srcnode, True Oo,<zS=ICk GetOperation srcnode, 1, op i;cqK&P;] op.val1 = xpos Vki3D'.7N op.val2 = ypos o(}vR<tD\ SetOperation srcnode, 1, op Gk<h_1WWK LockOperationUpdates srcnode, False VE!h!`<k w%kxY5q 'raytrace <)&;9C DeleteRays 0HE@L_$;2 CreateSource srcnode E[
,Ur`>: TraceExisting 'draw Rh%x5RFFc -*3wNGh{ 'radiometry <EJC.WWJa For k = 0 To GetEntityCount()-1 ;s{rJG{inG If IsSurface( k ) Then
Y.ic=<0H temp = AuxDataGetData( k, "temperature" ) HyB!8M| emiss = AuxDataGetData( k, "emissivity" ) P9gIKOOx#4 If ( temp <> 0 And emiss <> 0 ) Then |]V0sgpoZ ProjSolidAngleByPi = GetSurfIncidentPower( k ) + ~HL"Vv frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) 7 'N&jI irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi R{/nlS5 End If !-[e$?-
\:Q)Ef End If hl8[A-d(R AFyf7^^k Next k P@)zNik[ E`BL3+k Q Next j Go8 m PKk_9Xd Next i (Zp'|hx8o EnableTextPrinting( True ) )D Y?Y-n yy@g=<okt\ 'write out file yqZKn=1: fullfilepath = CurDir() & "\" & fname (wkeo{lx Open fullfilepath For Output As #1 Bf.@B0\ Print #1, "GRID " & nx & " " & ny t
?rUbN Print #1, "1e+308" K.B!-< Print #1, pixelx & " " & pixely THC34u] Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 U2seD5I Pi`}-GUe, maxRow = nx - 1 ry0P\wY} maxCol = ny - 1 y\]:&)?&C^ For rowNum = 0 To maxRow ' begin loop over rows (constant X) ~0eJ6i row = "" *Mk5*_
For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) !{jDZ?z{h row = row & irrad(colNum,rowNum) & " " ' append column data to row string C0J/FFBQ ^ Next colNum ' end loop over columns @uApm~} n'>`2 s Print #1, row <;G.(CK@n I'm.+(1m, Next rowNum ' end loop over rows 3U^E<H Close #1 ~"xc
3(h N$i!25F` Print "File written: " & fullfilepath [_q3 02 Print "All done!!" 3w6}%=)$8 End Sub +/E`u|%|\] 0CX2dk"UB^ 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: HJ~0_n& j&~`H:=E
(hr*.NS# 找到Tools工具,点击Open plot files in 3D chart并找到该文件 $DBJ"8n2 DvhJkdLB> nB>C3e 打开后,选择二维平面图: sF[7pE G&,F-|`
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