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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。 YXGxE&! !\q'{x5C 成像示意图 v0%FG9Gk 首先我们建立十字元件命名为Target 4uv*F:eo biHZyUJ 创建方法: 7t6TB*H Ys@\~?ym+ 面1 : Pm|S>r 面型:plane qK&h$;~*y 材料:Air vVbS
4_ 孔径:X=1.5, Y=6,Z=0.075,形状选择Box ,.uI> *47%|bf` c+UZ UgP 辅助数据: %lGg}9k' 首先在第一行输入temperature :300K, U{3Pk0rZ emissivity:0.1; f5#VU7=1F2 4?aNJyV%& snny!
0E\m 面2 : EB5^eNdL 面型:plane 12 bztlv 材料:Air ],f%:
?%50 孔径:X=1.5, Y=6,Z=0.075,形状选择Box L^jhr>-"; -$(2Z[ p@+D$ 位置坐标:绕Z轴旋转90度, y~rtYI
V}q=!zz ^FK-e;J 辅助数据: W_|7hwr >]?!9@#IH 首先在第一行输入temperature :300K,emissivity: 0.1; OJ)XJL x)e(g}n WNiM&iU Target 元件距离坐标原点-161mm; X@@7Qk t~
z;G%a |`@7G`x 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 NMhI0Ix$w "'U]4Z%q! HJOoCf 探测器参数设定: S~.%G)R ~@'DYZb-
H 在菜单栏中选择Create/Element Primitive /plane E
<h9o>h #80r?,q !F#^Peb #(r1b'jfP [J43] pt9fOih[ 元件半径为20mm*20,mm,距离坐标原点200mm。 ROr| < 0|`iop%(n 光源创建: 3>G"&T{ `5t
CmU 光源类型选择为任意平面,光源半角设定为15度。 {3\{aZ8) _S6SCSFc Zs}EGC~& 我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 p/Lk'h~ X5o{d4R L 我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线。 WD?COUEox !R1OSVFp ZNY),3? 功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 cmbl"Pqy1 8\e8$y3 创建分析面: p(S {k]ZL@ B7nm7[V G'6f6i|<I@ 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。 ug9]^p/)^ t3;QF ,\0>d}eh! 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。 f5hf<R),A d8/KTl FRED在探测器上穿过多个像素点迭代来创建热图 _qq>-{-Ym ')~[J$qz FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 2)jf~!o)Z 将如下的代码放置在树形文件夹 Embedded Scripts, {@T<eb$d 'Rw*WK =1% < 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。 M0"}>`1lJ T+)#Du 绿色字体为说明文字, j'nrdr6n LkUi^1((e '#Language "WWB-COM" 4F?O5&329i 'script for calculating thermal image map _:?b-44 'edited rnp 4 november 2005 A<[X@o}92 8Z(\iZ5Rgj 'declarations bn0Rv Dim op As T_OPERATION VyxX5Lrj Dim trm As T_TRIMVOLUME E#mpj~{- Dim irrad(32,32) As Double 'make consistent with sampling 1F94e)M)" Dim temp As Double ;&]oV`Ib Dim emiss As Double F}=O Mo:. Dim fname As String, fullfilepath As String $1;@@LSw ' |
bHu 'Option Explicit 6gJc?+ mA0|W#NB Sub Main
tf?"AY4 'USER INPUTS y_N h5 nx = 31 lyQNE3 ny = 31 Z6_E/S numRays = 1000 V?o%0V minWave = 7 'microns 7?"-NrW~ maxWave = 11 'microns yVb yw(gS sigma = 5.67e-14 'watts/mm^2/deg k^4 LFPYnK fname = "teapotimage.dat" ^ lM.lS>) (pkq{: Fs Print "" .+dego: Print "THERMAL IMAGE CALCULATION" 2N}h<Yd9 uy
oEMT#u detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 q;H5S<]/ Ai.^~#%X Print "found detector array at node " & detnode '=]|" R)BH:wg" srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 ^<QF*! .[>UkM0 Print "found differential detector area at node " & srcnode uE:`Fo=y x$/:%"E GetTrimVolume detnode, trm <%EjrjdvL+ detx = trm.xSemiApe #i}:CI>2 dety = trm.ySemiApe a
qIpO area = 4 * detx * dety !:9s>0';N Print "detector array semiaperture dimensions are " & detx & " by " & dety `ls^fnJTpf Print "sampling is " & nx & " by " & ny P'D'+qS f
l*O)r 'reset differential detector area dimensions to be consistent with sampling ~U`|+
5 pixelx = 2 * detx / nx -%6Y&_5VK pixely = 2 * dety / ny MFO1v%m SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False x] j&Knli Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 Qvhz$W[P> N2e]S8- 'reset the source power $SPA'63AC SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) _/)HAw?k Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" G=qT{c8Q p28=l5y+ 'zero out irradiance array dEG1[QG For i = 0 To ny - 1 $qy ST For j = 0 To nx - 1 |^$?9Dn9.L irrad(i,j) = 0.0 K1[(%<Gp Next j kCZxv"Ts Next i *-.,QpgTX `} :~,E 'main loop O t1:z:Pl EnableTextPrinting( False ) {BS`v5* 1h#UM6 ypos = dety + pixely / 2 {'1e? For i = 0 To ny - 1 =%oQIx xpos = -detx - pixelx / 2 p| o?nI ypos = ypos - pixely a7wc>@9Q, i!dQ
Sdf EnableTextPrinting( True ) +o^sm '$ Print i YB3?Ftgw EnableTextPrinting( False ) Nvj0MD{ X _&|<(m&." N(=\S: For j = 0 To nx - 1 w^wh|'u^_@ Q_M:v xpos = xpos + pixelx 9 7Mi{Zz Tg\wBhJr| 'shift source z<,rE LockOperationUpdates srcnode, True
D/] GetOperation srcnode, 1, op 4+'d">+| op.val1 = xpos w-?|6I}T op.val2 = ypos |]'0z0> SetOperation srcnode, 1, op ' LockOperationUpdates srcnode, False o%.0@W z`KP
}- 'raytrace 6P U]I+ DeleteRays FCA]zR1 CreateSource srcnode 35PIfqm TraceExisting 'draw t'im\_$F Z@ZSn0 'radiometry 3KN>t)A# For k = 0 To GetEntityCount()-1 XL!^tMk If IsSurface( k ) Then v"J7VF2 temp = AuxDataGetData( k, "temperature" ) /j:fc?yv emiss = AuxDataGetData( k, "emissivity" ) Ch,%xs.)G If ( temp <> 0 And emiss <> 0 ) Then /XZ\Yy= ProjSolidAngleByPi = GetSurfIncidentPower( k ) 2(iv+<t frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) bFtzwa5Gc irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi ] R-<v&O End If k$v8cE \YrvH End If To@77.' )R@M~d-o Next k I!;vy/r D;QV`Z%I Next j _ !H8j/b nHTb~t5Ke Next i URb EnableTextPrinting( True ) :1,xs e Xl\yOMfp 'write out file G0&'B6I> fullfilepath = CurDir() & "\" & fname I4%25=0? Open fullfilepath For Output As #1 oES4X{, Print #1, "GRID " & nx & " " & ny 2X!!RS>qg Print #1, "1e+308" y~/i{a;1y Print #1, pixelx & " " & pixely "?SR+;Y:q Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 jhkNi`E7 PuoN<9 # maxRow = nx - 1 6 Z7J<0 maxCol = ny - 1 %;qDhAu0 For rowNum = 0 To maxRow ' begin loop over rows (constant X) 9Ls=T=96 row = "" TATH,Sz:x For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) <Z^qBM row = row & irrad(colNum,rowNum) & " " ' append column data to row string /{HK0fd Next colNum ' end loop over columns V^ 5Z9! Aa`'g0wmc Print #1, row &RbT& F-I\x Next rowNum ' end loop over rows k}$k6Sr" Close #1 '1te(+;e@ 7UA|G2Zr Print "File written: " & fullfilepath ZK8I f?SD Print "All done!!" h(Ccm44 End Sub |{JJ2c\W \jGvom. 在输出报告中,我们会看到脚本对光源的孔径和功率做了修改,并最终经过31次迭代,将所有的热成像数据以dat的格式放置于: bk{.9nz 2 k>mqKzT0$+ 2i_X{!0} 找到Tools工具,点击Open plot files in 3D chart并找到该文件 ?2$0aq IQA<xqX k}r)I.Lp 打开后,选择二维平面图: U)y~{E~c34 #RWH k
QQ:2987619807 DA-W =Cc
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