-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2026-09-04
- 在线时间1983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。 NJ]3qH 'uE;8., 成像示意图 'y=N_/+s 首先我们建立十字元件命名为Target SZEi+CRs0 NSBcYObX 创建方法: 6]4#8tR1_ ]Axz}: 面1 : b\"w/'XX 面型:plane [F'|KcE3 材料:Air V$sY3,J7A% 孔径:X=1.5, Y=6,Z=0.075,形状选择Box {}$Zff U2l3E*O 7YR|6{@ 辅助数据: 1`YU9? 首先在第一行输入temperature :300K, JXM]tV emissivity:0.1; yIrJaS- &w#! Fs].Fa 面2 : "VZXi_P 面型:plane \+l*ZNYM3 材料:Air ?3p7MjvZ 孔径:X=1.5, Y=6,Z=0.075,形状选择Box 993f6 "4;nnq ,zltNbu\.( 位置坐标:绕Z轴旋转90度, I# &r5Q =E5bM_P<K I O:*F0 辅助数据: u '7h(1@ ?oFd%|I 首先在第一行输入temperature :300K,emissivity: 0.1; ATl?./T u Y}1c>5{bE xEp?|Q$ Target 元件距离坐标原点-161mm; 'gvR?[!t l6y}>] qh:Bc$S 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 Aeb(b+= sVK?sBs] USEb} M` 探测器参数设定: B*,)@h w?8SQI,~X 在菜单栏中选择Create/Element Primitive /plane pYx,*kG:HW ,VHqZ'6 ^>?=L\[ =c'4rJ$+ $2Whb!7Z( 6e%@uB}$ 元件半径为20mm*20,mm,距离坐标原点200mm。 jYFJk&c RqtBz3v 光源创建: I I+y W&IG,7tr 光源类型选择为任意平面,光源半角设定为15度。 y
%Q. ( Zgo~"G y%SxQA+\ 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。 \</!kY*3@t #GE]]7:Na 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。 IWQ0I&tzdx yQiY:SH 4,e'B-. 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。 (-21h0N[V @kWL "yy, 创建分析面: YV<y-,Io Lwr's'ao. x9"Cm;H% 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。 _x!idf 6^ wI^`NI ;!MQ@Fi^ 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。 RpQeQM= GtVT^u_ FRED在探测器上穿过多个像素点迭代来创建热图 >
S>*JP zj1~[$
( 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。 1f`De`zXzr 将如下的代码放置在树形文件夹 Embedded Scripts, Y~WdN<g HIXAA?_eh= ;=Ma+d# 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。 QB*,+u4 !6KX^j- 绿色字体为说明文字, 6ZqU:^3 ABN4kM>% '#Language "WWB-COM" ;xZ+1zmL0 'script for calculating thermal image map eDJnzh83 'edited rnp 4 november 2005 /jG?PZ=m xB
*b7-a 'declarations MJ|tfQwhx Dim op As T_OPERATION m+<&NDj. Dim trm As T_TRIMVOLUME HwUaaK
Dim irrad(32,32) As Double 'make consistent with sampling 3iCe5VF Dim temp As Double D&G6^ME Dim emiss As Double Vu:ZG*^ Dim fname As String, fullfilepath As String CS7b3p!I ?veeW6E( 'Option Explicit %Mda<3P ';tlV
u Sub Main ?UtKu 'USER INPUTS nTeA=0 4 nx = 31 Z hfp>D ny = 31 b^/u9 numRays = 1000 ;m]V12 minWave = 7 'microns EYT^*1,E* maxWave = 11 'microns j&8YE7 sigma = 5.67e-14 'watts/mm^2/deg k^4 j3Od7bBS] fname = "teapotimage.dat" kE&R;T`Gb% 74Jx \(d Print "" 16iTE-J_ Print "THERMAL IMAGE CALCULATION" kL'4m X+4Uh
I detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 Kxsd@^E aTvyzr1 Print "found detector array at node " & detnode ^E70$yB^ yKML{N1D srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 {7:1F)Pj e>MtDJ5 Print "found differential detector area at node " & srcnode Hn/t'D3 j1_>>xB GetTrimVolume detnode, trm q,P.)\0A detx = trm.xSemiApe J67
thTGFq dety = trm.ySemiApe %J*1F area = 4 * detx * dety '.v;/[0 Print "detector array semiaperture dimensions are " & detx & " by " & dety YWIA(p8Qkk Print "sampling is " & nx & " by " & ny vMzL+D2) + ~V%R{h 'reset differential detector area dimensions to be consistent with sampling 6tH}K pixelx = 2 * detx / nx +6WjOcu pixely = 2 * dety / ny f#s 6 'g
SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False vPnS`& Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 7!M; ?Y -M{szH 'reset the source power h% -=8l, SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) b 8@}Jv Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" #un'?]tZF C. .| O 'zero out irradiance array K_MEd1l For i = 0 To ny - 1 lMgguu~qg For j = 0 To nx - 1 ]9QXQH irrad(i,j) = 0.0 !zK"y[V Next j
^tTM
7 Next i _{o 3 y"DZ (Aw@}! 'main loop 0*MUe1{ EnableTextPrinting( False ) 8$uq60JK o "r ypos = dety + pixely / 2 27Gff(
For i = 0 To ny - 1 zTue(Kr xpos = -detx - pixelx / 2 "smU5 s,P ypos = ypos - pixely tar/n o Y$OE[nGi%X EnableTextPrinting( True ) %g?M?D8Ud3 Print i X!hzpg(`hR EnableTextPrinting( False ) gYt=_+- `C4(C4u J{4=:feIC? For j = 0 To nx - 1 +=W(c8~P @0@WklAJA xpos = xpos + pixelx Eq_@xT0> -']Idn6 'shift source U/Cc!WXV] LockOperationUpdates srcnode, True $bhI2%_`M GetOperation srcnode, 1, op o"qxR'V op.val1 = xpos D{t_65c- op.val2 = ypos /K2[`+- SetOperation srcnode, 1, op whN<{AG LockOperationUpdates srcnode, False bM'F8Fi |g hyH 'raytrace !}}
)f/ DeleteRays X!V#:2JY CreateSource srcnode mBL?2~M TraceExisting 'draw /sYr?b!/<6 &am<_Tn*3 'radiometry }#<Rs For k = 0 To GetEntityCount()-1 ,./n@.na If IsSurface( k ) Then I`+,I`~u temp = AuxDataGetData( k, "temperature" ) BuvnY emiss = AuxDataGetData( k, "emissivity" ) *QN,wBQ If ( temp <> 0 And emiss <> 0 ) Then xsU%?"r ProjSolidAngleByPi = GetSurfIncidentPower( k ) +6: frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) a,fcKe&B irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi J<0sT=/2$ End If 8i^
./P n"?*"Ya End If |A68+(3u |J@
&lBlq Next k ) M8,Tv*~
"O#
V/( Next j Ca5LLG B3yTN6- Next i .Tl,Ek( EnableTextPrinting( True ) "kFNOyj3\ 2asRJ97qES 'write out file KO`dAB F} fullfilepath = CurDir() & "\" & fname %O!xrA{ Open fullfilepath For Output As #1 ZG +FX:v Print #1, "GRID " & nx & " " & ny W$7H "tg Print #1, "1e+308" CY':'aWfa< Print #1, pixelx & " " & pixely u-jV@Tz Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 By9CliOy: Ugo! maxRow = nx - 1 Y9-F\t=~ maxCol = ny - 1 0`V=x+*, For rowNum = 0 To maxRow ' begin loop over rows (constant X) .(8V row = "" %Cj_z For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) 8mOGEx row = row & irrad(colNum,rowNum) & " " ' append column data to row string K8&) kfyI Next colNum ' end loop over columns "3 ++S ;Y8>? Print #1, row +tt!xfy -cJ,rrN_9 Next rowNum ' end loop over rows tZx}/&m- Close #1 # bjK]+ a~R.">>$ Print "File written: " & fullfilepath 0)zJG | Print "All done!!" BK)<~I End Sub @0
x V^!^wLLi 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: d"E3ypPK 7}MnvWP XgXXBKf$ 找到Tools工具,点击Open plot files in 3D chart并找到该文件 B[h^] k @@-TW`G7 'C`Ykjf 打开后,选择二维平面图: :+w6i_\d5 #Muh|P]%\
QQ:2987619807 RO3q!+a$/
|