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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。 ;EP:o%r ~kEI4}O 成像示意图 {#@W)4)cA 首先我们建立十字元件命名为Target oYm[V<nIl \D*KGd]M0 创建方法: V<T9&8l+: D=-SO
+ 面1 : v0H@Eg_ 面型:plane RwpdRBb 材料:Air L?mrbay 孔径:X=1.5, Y=6,Z=0.075,形状选择Box %z,mB$LY `xqr{lhL l*d(;AR 辅助数据: ~d|A!S` 首先在第一行输入temperature :300K, Nh_Mz;ITuu emissivity:0.1; "hH.#5j /rnu<Q#iH vunHNHltW0 面2 : !Fd~~v 面型:plane Z8K? 材料:Air #W4dkCd(pF 孔径:X=1.5, Y=6,Z=0.075,形状选择Box 61k"p2?+ Ku5\] \Je0CD=e` 位置坐标:绕Z轴旋转90度, |B.Y6L6l ) l:[^$=, =5~jx 辅助数据: nrub*BuA z[L8$7L 首先在第一行输入temperature :300K,emissivity: 0.1; <lx+/o eD?tLj 1WxK#c-) Target 元件距离坐标原点-161mm; < $lCkSx<Q
_=F=`xu W$hx,VEy` 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 ib#KpEk n|Q@UPb/= ]hk 探测器参数设定: g?goZPZB 8lvV4yb 在菜单栏中选择Create/Element Primitive /plane u8&Z!p\ gY/"cq S&Zm0Ku . qO@Q = C~,a!qY 5F)C jQ 元件半径为20mm*20,mm,距离坐标原点200mm。 +"
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)avF {FeDvhv 光源创建: KX ,S *2pt%eav 光源类型选择为任意平面,光源半角设定为15度。 =_JjmTy;a ?+@n3]`0 h7G"G" 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。 *+Ek0M 9-&Ttbb4)0 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。 /M1ob: m 4tRYw0f47 JVvs-bK5 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。 q9KHmhUD X5zDpi|Dq 创建分析面: 6Zm# bFQ AifWf2$S yj 3cyLXw 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。 Yb|c\[ % -`*a'p-= a!6{:8Zi0 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。 W <9T0sZ 6M @[B|Q( FRED在探测器上穿过多个像素点迭代来创建热图 rK' L6o {f/~1G[M 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。 XRM_x:+] 将如下的代码放置在树形文件夹 Embedded Scripts, :;t:H]
f "jeb%k :3v}kLO7| 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。 Yg]-wQrH @'#,D!U 绿色字体为说明文字, M'7f O3&| }|0^EWL '#Language "WWB-COM" pnl{&<$C%C 'script for calculating thermal image map !`Fxa4i> 'edited rnp 4 november 2005 ]l_\71 D=q:*x 'declarations n,vct<&z@ Dim op As T_OPERATION s 1A.+ Dim trm As T_TRIMVOLUME T,,WoPU8t Dim irrad(32,32) As Double 'make consistent with sampling ^cOUQ33 Dim temp As Double t6bV?nc Dim emiss As Double dU&a{$ku[ Dim fname As String, fullfilepath As String : %lTU gh/EU/~d 'Option Explicit F+YZE[h% ~qiJR`Jj Sub Main Sj%u)#Ub 'USER INPUTS kvL=>
A nx = 31 @E&J_un ny = 31 G,&<<2{(f; numRays = 1000 5Yg'BkEr minWave = 7 'microns @6Y?\Wx$w maxWave = 11 'microns j8v8uZ;x sigma = 5.67e-14 'watts/mm^2/deg k^4 F|SXn\ fname = "teapotimage.dat" +SP{hHa^ xT3BHnQ( Print "" ? ^0:3$La Print "THERMAL IMAGE CALCULATION" \\iQEy<i FvaUsOy" detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 ^h(ew1: ]AINKUI0 Print "found detector array at node " & detnode {3|t;ZHk =:xW>@bh| srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 aB_F9;IR _F6OM5F"N Print "found differential detector area at node " & srcnode S5gyr&dm >~''&vdsk\ GetTrimVolume detnode, trm &Qf/>@ l} detx = trm.xSemiApe "M<8UE \n dety = trm.ySemiApe A!od9W6 area = 4 * detx * dety ui<N[ Print "detector array semiaperture dimensions are " & detx & " by " & dety H`*LBqDk Print "sampling is " & nx & " by " & ny =2`[& 1h^:[[!c 'reset differential detector area dimensions to be consistent with sampling G!Op~p@Jm pixelx = 2 * detx / nx Gj1&tjK pixely = 2 * dety / ny {j{u6i SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False )1]ZtU Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 3U<cWl@ d2*fLEsF 'reset the source power P}Gj%4/G SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) _zR+i]9 Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" ~uj#4>3T LD+{o 4i
'zero out irradiance array /
kF) For i = 0 To ny - 1 6LvW?z(J For j = 0 To nx - 1 k9<;woOBO irrad(i,j) = 0.0 q_MPju&* Next j @KXV%a' Next i
oI?3<M^ EuEZ D+ 'main loop `
)/vq-9 EnableTextPrinting( False ) ~k"=4j9 B al`y ypos = dety + pixely / 2 Me r/G2#& For i = 0 To ny - 1 qz"}g/;? xpos = -detx - pixelx / 2 ;0Q4<F ypos = ypos - pixely E~DQ-z e2AX0( EnableTextPrinting( True ) *^\Ef4Lh Print i `68@+|# EnableTextPrinting( False ) oK9( /v :,3C 0T3r 3$jT*OyG# For j = 0 To nx - 1 Q0)#8Rcm ~IY% xpos = xpos + pixelx B~'vCuE |h KDvH 'shift source ?U%qPv: LockOperationUpdates srcnode, True |'e^QpU5 GetOperation srcnode, 1, op K='z G*$l op.val1 = xpos #oS<E1 op.val2 = ypos 8f_l}k$Eg SetOperation srcnode, 1, op /,BD#| LockOperationUpdates srcnode, False ^a/gBC82x sG(~^hJ_ raytrace IDad9 Bx DeleteRays WEw6He; CreateSource srcnode %2}-2}[> TraceExisting 'draw 5us:adm[pD %@<8<6&q 'radiometry yjO1 Ol For k = 0 To GetEntityCount()-1 HSw;^E)1 If IsSurface( k ) Then 0 3L] temp = AuxDataGetData( k, "temperature" ) A9[ F emiss = AuxDataGetData( k, "emissivity" ) tl[Uw[ If ( temp <> 0 And emiss <> 0 ) Then ZFA`s
qT ProjSolidAngleByPi = GetSurfIncidentPower( k ) <]6SN frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) %Si6]3-^@ irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi 1Rt33\1J0 End If ,[N%Q# k6;?)~. End If TeMHm?1^ eJrQ\>z]V& Next k 55G+; JL`-0P<M Next j v|Pv 03%?7 ;/bewivNJ Next i #{6{TFx\ EnableTextPrinting( True ) /RG:W0=K G?9"Y% 'write out file &r[`>B{tP fullfilepath = CurDir() & "\" & fname DKH-Q(M56 Open fullfilepath For Output As #1 kAKK bmE Print #1, "GRID " & nx & " " & ny R1s`z|? Print #1, "1e+308" V~UN Print #1, pixelx & " " & pixely UI0(=>L Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 xn?a. 3b'
&U{#Kt5q maxRow = nx - 1 Z
EQ@IS:Y maxCol = ny - 1 XP`Nf)3{Yd For rowNum = 0 To maxRow ' begin loop over rows (constant X) FX;QG94! row = "" :)8VdWg For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) 7( #:GD row = row & irrad(colNum,rowNum) & " " ' append column data to row string '%>=ZhO Next colNum ' end loop over columns ^Xz@`_I -Sqz5lo Print #1, row ?)/#+[xa ;Y)w@bNt@ Next rowNum ' end loop over rows &PL8 |