-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2026-03-11
- 在线时间1941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。 I0)`tQ+ {3tzr ;c? 成像示意图 ^/2I)y]W0 首先我们建立十字元件命名为Target 1sQIfX#2f 9t"Rw ns 创建方法: V8?}I)#(7 @w[i%F,&` 面1 : 9 E!le=> 面型:plane OU[<\d 材料:Air _!\d?]Ya 孔径:X=1.5, Y=6,Z=0.075,形状选择Box :gh[BeqQ) e3?=1ZB 6[> lzEZ 辅助数据: uepyH 首先在第一行输入temperature :300K, ff"wg\O4 emissivity:0.1; A =Wg0eYy\ }SN( ^3N XIeLu"TSL 面2 : n|SV)92o1 面型:plane #%0V`BS7n 材料:Air <uH8Fivb 孔径:X=1.5, Y=6,Z=0.075,形状选择Box z ^gJy,T E9HMhUe NO"PO
@&Wk 位置坐标:绕Z轴旋转90度, *eVq(R9?T EdJL&* a&y^Ps6= 辅助数据:
l] nt@0+ k*.]*]
首先在第一行输入temperature :300K,emissivity: 0.1; RU )35oEV| \oQ]=dDCd% H"C'<(4*\ Target 元件距离坐标原点-161mm; +]db- mP(3[a_Q w2)Ro:G 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 g*|j+<:7 5Wt){rG0Z f-=\qSo 探测器参数设定: {|+Y;V` IUcL* 在菜单栏中选择Create/Element Primitive /plane 5jdZC(q5a ^4y]7p US6_5>/ n\#YGL<n fCl}eXg6w )*|/5wW1 元件半径为20mm*20,mm,距离坐标原点200mm。 yqK4 "F& c}x1-d8 光源创建: G7-BeA8 *dzZOe>, 光源类型选择为任意平面,光源半角设定为15度。 {Z.6\G&q |m19fg3u =lXj%V^8N 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。 Gn]36~)*H e_vsiT 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。 s:`i~hjq cH]tZ$E` &v\F ah U 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。 ]6&NIz`:, xS18t=" 创建分析面: SGd]o"VF d1/emwH 6 Z/`p~e 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。
gwZ<$6 NzRvb j] }fpya2Xt 到此,所有的光学结构和属性设定完成,通过光线追迹我们可以查看光线是否可以穿过元件。 LzygupxY! lG*Rw-?a FRED在探测器上穿过多个像素点迭代来创建热图 L\yVE
J9x xVvUx,t FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 'Pz%c}hJ 将如下的代码放置在树形文件夹 Embedded Scripts, -@uFRQt ><%585 B(
[x8A] 打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 V la,avON E' 5*w6 绿色字体为说明文字, vNv?trw NGra/s,9| '#Language "WWB-COM" A 'qe2] 'script for calculating thermal image map yr]ja-Y 'edited rnp 4 november 2005 }ze+ tf U%{GLO 'declarations \?bV\/GBR Dim op As T_OPERATION (Guzj*1 2 Dim trm As T_TRIMVOLUME l,wlxh$}( Dim irrad(32,32) As Double 'make consistent with sampling p<R:[rz Dim temp As Double Hg+<GML Dim emiss As Double Q&m85'r5X Dim fname As String, fullfilepath As String Re%[t9F& vr!J3H f 'Option Explicit ^df wWP PN}+LOD<t Sub Main 8(3(kZx S 'USER INPUTS ;yH>A ;,K% nx = 31 B6XO&I1c ny = 31 @xG&K{j numRays = 1000 w+o5iPLX minWave = 7 'microns =;Id["+ maxWave = 11 'microns PSrx! sigma = 5.67e-14 'watts/mm^2/deg k^4 M8^ID # fname = "teapotimage.dat" 3qYGEhxv `CK~x= Print "" ~W'DEpq_ Print "THERMAL IMAGE CALCULATION" %zavSm" [%IOB/{N detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 !3Dq)ebBz 4^_6~ YP7 Print "found detector array at node " & detnode Rq4;{a/j MB}nn&u# srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 Q
G)s uLms0r\@! Print "found differential detector area at node " & srcnode j*=!M# D dQX-s=XJ GetTrimVolume detnode, trm J%|?[{rO{' detx = trm.xSemiApe ktu?-?#0, dety = trm.ySemiApe dg D-"-O area = 4 * detx * dety Sn:>|y~ Print "detector array semiaperture dimensions are " & detx & " by " & dety cJKnB!iL5 Print "sampling is " & nx & " by " & ny ! FcGa w0QtGQ| 'reset differential detector area dimensions to be consistent with sampling ,f03TBD} pixelx = 2 * detx / nx o'Bd. B pixely = 2 * dety / ny /"m s SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False ZlV Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 vrn4yHoZ SA,~q& 'reset the source power '2,~'Zk SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) ]aN9mT
N Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" eAHY/Y! g 2Fg 'zero out irradiance array So5/n7 For i = 0 To ny - 1 %$BRQ-O For j = 0 To nx - 1 [d`Jw/4n irrad(i,j) = 0.0 I=`? 4% Next j 'CBwE&AL Next i LpHGt]|D IRW0.'Dn 'main loop |N,^*xP(6 EnableTextPrinting( False ) UrniJB] bGh&@&dHr ypos = dety + pixely / 2 \F
_1C= For i = 0 To ny - 1 v[CR$@Y xpos = -detx - pixelx / 2 * :"*' ypos = ypos - pixely e9acI>^w zK0M WyXO EnableTextPrinting( True ) 3G// _f Print i _JH.&8 EnableTextPrinting( False ) &{)<Q(g I0-1Hr ,#a4P`q'iC For j = 0 To nx - 1 C&O8fNB_ %Tp9GGt xpos = xpos + pixelx v]JET9hY >WHajYO" 'shift source 0+&WIs LockOperationUpdates srcnode, True ,Wtw0)4 GetOperation srcnode, 1, op 6Ga'_P: op.val1 = xpos 97c0bgI!+ op.val2 = ypos qw+7.h#V SetOperation srcnode, 1, op lyL6w1 LockOperationUpdates srcnode, False @Y~gdK )St0}?I~ raytrace AFt- V DeleteRays .M6. ]H CreateSource srcnode Z@Rqm:e TraceExisting 'draw G>~/ U<6)CW1; 'radiometry LM<*VhX For k = 0 To GetEntityCount()-1 '{`KYKLP+ If IsSurface( k ) Then 9WHE4'Sa temp = AuxDataGetData( k, "temperature" ) %/eG{oh- emiss = AuxDataGetData( k, "emissivity" ) {[uhIJD3g6 If ( temp <> 0 And emiss <> 0 ) Then +kI}O*s ProjSolidAngleByPi = GetSurfIncidentPower( k ) Q-) ( s frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) 1^IMoC7$# irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi P, x"![6 End If x]VycS #kQ! GMZH End If n3e,vP? R lG6&uMvo Next k
dX\OP> 5?3 v;B6 Next j mmQC9nZ uVYn,DB` Next i &4E|c[HN EnableTextPrinting( True ) %<~Ewno T sta/i?n 'write out file H_g]q fullfilepath = CurDir() & "\" & fname pyf'_ Open fullfilepath For Output As #1 Rd(8j+Q?ps Print #1, "GRID " & nx & " " & ny |A4B4/! Print #1, "1e+308" 5ncW
s) Print #1, pixelx & " " & pixely <\*)YKjn/@ Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 %g*nd#wG JKKp5~_~ maxRow = nx - 1 $%U}k=- maxCol = ny - 1 /A5=L<T6F For rowNum = 0 To maxRow ' begin loop over rows (constant X) 8y<mHJ[B row = "" %n]jsdE^| For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) D~inR3(} row = row & irrad(colNum,rowNum) & " " ' append column data to row string Gb2|e.z Next colNum ' end loop over columns aT/2rMKPF K*^'tltJ Print #1, row Qc33CA W'Gh:73'} Next rowNum ' end loop over rows @3eMvbI Close #1 W}F~vx. Cpzd k~+H Print "File written: " & fullfilepath T7YJC,^m Print "All done!!" 6oKlr,. End Sub |
{zka.sJ
*3^7'^j< 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: e_Zs4\^ef EAY+#>L* oe6Ex5h 找到Tools工具,点击Open plot files in 3D chart并找到该文件 ;E}&{w/My 4PC'7V=S @"cnPLh& 打开后,选择二维平面图: 1`II%mf[ 8<Nz34Y
|