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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。 ,,IK} i? #U>0! 成像示意图 $Op:-aW& 首先我们建立十字元件命名为Target ,O^kZ}b -sle7 k 创建方法: ~"wnlG-: 9WQ'"wyAQ 面1 : FcOrA3tt 面型:plane h]|2b0 材料:Air 4
BNbS|?vV 孔径:X=1.5, Y=6,Z=0.075,形状选择Box eCg|@d% D eUgKwu; sv "GX<+ 辅助数据: @}+B%R 首先在第一行输入temperature :300K, 4zBcq<R7 emissivity:0.1; xBw ua; A9[D.W9> cyL|.2, 面2 : `sRys oW 面型:plane OQyZ' 材料:Air [E}pU8.t6 孔径:X=1.5, Y=6,Z=0.075,形状选择Box Pb@$RAU63 {gDoktC@M ZQ_~
L!ot 位置坐标:绕Z轴旋转90度, IY2f$YV Aj> IUh)g1u41O 辅助数据: +J}h f-}_ 首先在第一行输入temperature :300K,emissivity: 0.1; Y[ ;Z7p :?#wWF. A2fuNV_ Target 元件距离坐标原点-161mm; eN<?rVZl k.H4Mf(4 f{]W*!VV- 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 G)9`Qn gkx<<)y
l `M_w^&6+n 探测器参数设定: lJ4/bL2I/ E `%*lGu_ 在菜单栏中选择Create/Element Primitive /plane EixAmG h&bs` 6~8dMy;w !t&C,@Ox Lez]{%+.`[ `
B+Pl6l)F 元件半径为20mm*20,mm,距离坐标原点200mm。 \&Oc}] k )fLJ9R 光源创建: Jqt|'G3 ]5eZLXM 光源类型选择为任意平面,光源半角设定为15度。 T\T>\&nY+| qNbgN{4 bLz('mUY 我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 L0xh?B d1d:5b 我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线。 3W?H^1t 5|oi*b ]LSlo593 功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 /KCIb:U mDIN%/S' 创建分析面: G\S_e7$/ Dt+uf5o( fu`|@S 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。 }cI _$ 6
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YoRD9M~iG~ 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。 "NO*(<C.R Jb`yK@x FRED在探测器上穿过多个像素点迭代来创建热图 f<2<8xS Csx??T_>r 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。 n0'"/zyc 将如下的代码放置在树形文件夹 Embedded Scripts, s!K9-qZl< 1`EkN0iZ ? `# 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。 SV_b(wP9 tumYZ)nW 绿色字体为说明文字, VxGR[kq$] I-|1eR+3 '#Language "WWB-COM" e{IwFX 'script for calculating thermal image map Ezw< 'edited rnp 4 november 2005 Q!}LtR$ ^Jn=a9Q6Z 'declarations @RVj~J.A Dim op As T_OPERATION >U'gQS?\] Dim trm As T_TRIMVOLUME {FNq&)#` Dim irrad(32,32) As Double 'make consistent with sampling uze5u\ Dim temp As Double ;"DI)hdz Dim emiss As Double *6P)HU@ Dim fname As String, fullfilepath As String *Mr'/qp, }VXZM7@u 'Option Explicit 3!KEk?I] 1jQlwT(: Sub Main }h`ddo 'USER INPUTS \dc*!Es nx = 31 ^Dw18gqr=@ ny = 31 _8nT$!\\ numRays = 1000 E,:E u< minWave = 7 'microns u}IQ)Ma maxWave = 11 'microns sBm/9vu sigma = 5.67e-14 'watts/mm^2/deg k^4 V(6ovJpA0 fname = "teapotimage.dat" LDv>hzo +%RB&:K7, Print "" v?(9ZY] Print "THERMAL IMAGE CALCULATION" 8n)3'ok ,*'aH z detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 _i+7O^=d6X ?;)F_aHp Print "found detector array at node " & detnode 92S,W?( QF`o%mI srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 i$W=5B>SO rpO>l Print "found differential detector area at node " & srcnode E'4dI: y@Q?
guB GetTrimVolume detnode, trm {oc7Chv=/H detx = trm.xSemiApe @je vY81) dety = trm.ySemiApe 2w? 5vSv area = 4 * detx * dety n"c3C) Print "detector array semiaperture dimensions are " & detx & " by " & dety ~`Xu6+1o Print "sampling is " & nx & " by " & ny 2k3yf_N JPfE`NZ 'reset differential detector area dimensions to be consistent with sampling ck4g=QpD{ pixelx = 2 * detx / nx O/2Jz pixely = 2 * dety / ny sOLR *=F{ SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False PFnq:G^L Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 ^L;k v"a.%"oN8 'reset the source power gR:21*&cz SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) !2Q> Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" 3teanU` =C.WM*= ' 'zero out irradiance array a2N4Jg@ For i = 0 To ny - 1 <E.$4/T For j = 0 To nx - 1 !~~j&+hK\ irrad(i,j) = 0.0 6$^dOJ_" Next j lKF<]25 Next i 3?R QPP <"XDIvpc%L 'main loop \4e6\6 + EnableTextPrinting( False ) -P3;7_}]:h jB-)/8.qk ypos = dety + pixely / 2 X}gnO83 For i = 0 To ny - 1 y3vm+tJc{ xpos = -detx - pixelx / 2 K'zG[[P ypos = ypos - pixely v
lsS T{%'"mm; EnableTextPrinting( True ) /4Lmu+G4 Print i E[RLBO[*n EnableTextPrinting( False ) Ew kZzVuX gwepaW d4#Ra% For j = 0 To nx - 1 z.7'yJIP# `i)&nW)R xpos = xpos + pixelx .5~W3v
< JrdH6Zg 'shift source ?~5J!|r# LockOperationUpdates srcnode, True g$f; GetOperation srcnode, 1, op SLze) ?. op.val1 = xpos Ag!#epi{0 op.val2 = ypos 8/y~3~A{D SetOperation srcnode, 1, op bu2'JIDR LockOperationUpdates srcnode, False hsUP5_ .{|AHW&0< 'raytrace hoQ?8}r: DeleteRays MXxE)"G*a CreateSource srcnode Ay Obaa5 TraceExisting 'draw F^]?'`7md F& 'HZX 'radiometry mJ%r2$/* For k = 0 To GetEntityCount()-1 RO"*&o'K' If IsSurface( k ) Then 69v[*InSd temp = AuxDataGetData( k, "temperature" ) DgLSDKO! emiss = AuxDataGetData( k, "emissivity" ) [[[QBplJ If ( temp <> 0 And emiss <> 0 ) Then d[9NNm*htC ProjSolidAngleByPi = GetSurfIncidentPower( k ) PUN.nt frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) ]PnE% irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi -e{H 8ro End If -^(NIl' IrRn@15, End If ibOXh U y{eZrX| Next k W&>+~A !!c.cv' Next j JAA P5ur `f:5w^A Next i C3 %, pDh EnableTextPrinting( True ) [^gSWU pr-{/6j6 'write out file JHf}LZu fullfilepath = CurDir() & "\" & fname wBcDL/(> Open fullfilepath For Output As #1 K6,5C0 Print #1, "GRID " & nx & " " & ny b* 6c.
Print #1, "1e+308" Lh &L5p7 Print #1, pixelx & " " & pixely "gCSbMq(Vq Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 omV.Qb'NS Oz9k.[j( maxRow = nx - 1 F|V co]"S1 maxCol = ny - 1
YV 9*B For rowNum = 0 To maxRow ' begin loop over rows (constant X) K@{jY\AZNx row = "" qi7wr\XNW For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) zYOPE 6E row = row & irrad(colNum,rowNum) & " " ' append column data to row string <MN+2^ed& Next colNum ' end loop over columns utwh"E&W 0 EXAdRR Print #1, row H[x 9 7r ?<w +{ Next rowNum ' end loop over rows U
gB Close #1 {\t:{.F
A 7$GP#V1r/ Print "File written: " & fullfilepath
xuelo0h, Print "All done!!" ,ASY
&J5)7 End Sub PyHE>C% Yb =8\<; 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: ,)L.^< B0Z~L){i O!f* @ 找到Tools工具,点击Open plot files in 3D chart并找到该文件 I{cn ,,8 3iWLo Qm ;T52aX 打开后,选择二维平面图: ]Ly)%a32 o7 !@WOeZ3
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