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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。 fQ1Dp 3dJiu 成像示意图 / U!xh3 首先我们建立十字元件命名为Target 49HP2E C^c<s 创建方法: _pzYmQ +_25E.>ml 面1 : JDW/Mc1bh 面型:plane mwMu1# 材料:Air H?FiZy*[Y 孔径:X=1.5, Y=6,Z=0.075,形状选择Box #K*p1}rf @
'c(q=K; C+>mehDC_G 辅助数据: A'Z!l20_ 首先在第一行输入temperature :300K, 9g#
62oIg emissivity:0.1; Vk*XiEfKm> &kn?=NW ?NvE9+n 面2 : !1K.HdK 面型:plane m2/S(f 材料:Air C(UWir3mW? 孔径:X=1.5, Y=6,Z=0.075,形状选择Box ROvY,-? ]1eZ<le`6 _yF@k~
h 位置坐标:绕Z轴旋转90度, m%UF{I, I8 [
* KS1udH^Zc 辅助数据: yE.st9m [P0c,97_
H 首先在第一行输入temperature :300K,emissivity: 0.1; i[MBO`FF C~?p85 t,'J%)j Target 元件距离坐标原点-161mm; 9P,[MZ >rSCf= :fnJp9c 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 =[[I<[BZq T!Tp:&O- 9Y2.ob!$} 探测器参数设定: J`C 2}$
~ \){_\{& 在菜单栏中选择Create/Element Primitive /plane 9G"4w` P &x=_n' XH0o8\. TaaCl#g$? .:4*HB |'u BkL0q 元件半径为20mm*20,mm,距离坐标原点200mm。 mKyF<1,m J_j4Zb% K 光源创建: SUIu.4Mz ]Nw]po+ 光源类型选择为任意平面,光源半角设定为15度。 #%8)'=1+4? 9YB?wh'S[ WvoIh4] 我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 s<Nw)Ynw N H:Bdl3 我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线。 {.0I!oWv +fKV/tSWi ;CoD5F! 功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 QFN 9j {X<_Y< 创建分析面: XbeT x "pcr-?L fZS'e{V 到这里元件参数设定完成,现在我们设定元件的光学属性,在前面我们分别对第一和第二面设定的温度和发射系数,散射属性我们设定为黑朗伯,4%的散射。并分别赋予到面一和面二。 .wTb/x xRO9o3 F&^&"(H} 到此,所有的光学结构和属性设定完成,通过光线追迹我们可以查看光线是否可以穿过元件。 :oYSvK7> @3 + FRED在探测器上穿过多个像素点迭代来创建热图 9eE
FX7 ?B)e8i<[f FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 ,1-idpnX 将如下的代码放置在树形文件夹 Embedded Scripts, DHyQ:0q \d:Uq5d)0 \}<J>R@ 打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 tNOOaj9mw V\Y,4&bI 绿色字体为说明文字, [9}<N2,9z :/Z1$xS '#Language "WWB-COM" Fo5UG2E& 'script for calculating thermal image map #,FXc~ V 'edited rnp 4 november 2005 33a}M;vx a*_&[ 'declarations >HzTaXCR[ Dim op As T_OPERATION n$h+_xN Dim trm As T_TRIMVOLUME paYS<8In Dim irrad(32,32) As Double 'make consistent with sampling u*oP:!s Dim temp As Double M?<iQxtyb} Dim emiss As Double mq(K_ Dim fname As String, fullfilepath As String hYA1N&yz@ cg_tJ^vrY 'Option Explicit v}z^M_eFm X'%BS Sub Main >}C:EnECy 'USER INPUTS u@+^lRGFh nx = 31 7|[Dr@.S ny = 31 U+(qfa5( numRays = 1000 74(bo\ minWave = 7 'microns '%rn-|) maxWave = 11 'microns Gg:W% sigma = 5.67e-14 'watts/mm^2/deg k^4 Ra^c5hP:.E fname = "teapotimage.dat" F4~O-g.< V1,~GpNx Print "" 31%3&B:Ts Print "THERMAL IMAGE CALCULATION" onS4ZE3B jH;L7 detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 ]/%CTD(O OU^I/TU Print "found detector array at node " & detnode An,TunX '^O}` srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 8Bxb~* 0&Iu+hv Print "found differential detector area at node " & srcnode ;L$l0(OO /nt%VLms% GetTrimVolume detnode, trm DIhV;[\ detx = trm.xSemiApe /R(
.7 N dety = trm.ySemiApe OKj\>3 area = 4 * detx * dety _?bF;R Print "detector array semiaperture dimensions are " & detx & " by " & dety l~@ -oE Print "sampling is " & nx & " by " & ny \!0~$?_)P n2["Ln mO 'reset differential detector area dimensions to be consistent with sampling uhwCC pixelx = 2 * detx / nx ZKB27D_vg> pixely = 2 * dety / ny %T;VS-f SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False 3XUsw1,[ Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 ws,VO*4 sd*NY 'reset the source power i^4i]+ SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) '(3|hh)Tl Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" 4]%MrSjS k4"O}jQO 'zero out irradiance array OPv~1h<[ For i = 0 To ny - 1 E-?JHJloU For j = 0 To nx - 1
H^$7= irrad(i,j) = 0.0 >k~3W> D Next j Vr T0S Next i A{DE7gp! =}F$r5] 'main loop ;`a~9uG EnableTextPrinting( False ) 7|)K! E1qf N>0Z ypos = dety + pixely / 2 8` WaUB% For i = 0 To ny - 1 NnY+=#j7L xpos = -detx - pixelx / 2 \YsLVOv%:d ypos = ypos - pixely 0!1cHB/c 5j5}c`: EnableTextPrinting( True ) $n::w c
Print i #/hXcF EnableTextPrinting( False ) h]o{>
|d9 b X/%Q^Y V?jot<|$ For j = 0 To nx - 1 8Tp!b
%2. ;\Pq xpos = xpos + pixelx :HH3=.qAp` e:|Bn>* 'shift source >WY\P4)k LockOperationUpdates srcnode, True (;++a9GK GetOperation srcnode, 1, op fZxEE~Q1 op.val1 = xpos v)v`896S` op.val2 = ypos l9{.~]V SetOperation srcnode, 1, op $# J LockOperationUpdates srcnode, False }#` -mRaU 6>Is-/hsy 'raytrace .:SY:v r DeleteRays p8E6_%Rw CreateSource srcnode tE:6 TraceExisting 'draw H+VjY MvK tI+P&L" 'radiometry R!RgQwEak For k = 0 To GetEntityCount()-1 wf,w%n If IsSurface( k ) Then #pWeMt' temp = AuxDataGetData( k, "temperature" ) JP6+h>ft emiss = AuxDataGetData( k, "emissivity" ) KU87WpjX If ( temp <> 0 And emiss <> 0 ) Then 1u_< 1X3 ProjSolidAngleByPi = GetSurfIncidentPower( k ) aq.Lnbi/X frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) oP`Qyk irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi x I(X+d`` End If Y:]m~-T $`|\aXd[C* End If V7,;N@FL Xm~N Bt Next k 91}kBj B3@\Ua) Next j Y
i`wj^ /jd.<r=_I Next i
_'U(q\ri EnableTextPrinting( True ) d0G d5% KqzQLu 'write out file @[hD;xO fullfilepath = CurDir() & "\" & fname ge$ p/ Open fullfilepath For Output As #1 2NZC,znQ Print #1, "GRID " & nx & " " & ny }x?2 txuu Print #1, "1e+308" A=\:b^\ Print #1, pixelx & " " & pixely ZKoISuM Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 -X,[NI3 *ZV=4[#bT maxRow = nx - 1 nT/Azg maxCol = ny - 1 oNIt<T For rowNum = 0 To maxRow ' begin loop over rows (constant X) o@DlK` row = "" y"Jma`Vjq For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) g I@I.=y row = row & irrad(colNum,rowNum) & " " ' append column data to row string qnTW?c9Z5 Next colNum ' end loop over columns ]"VxEpqhM ZRj&k9D^U Print #1, row :o}LJc)| 5HW'nhE Next rowNum ' end loop over rows j@Y'>3 Close #1 h7o?z! \CZD.2p#& Print "File written: " & fullfilepath 50NLguE Print "All done!!" d\j[O9W> End Sub ZoT8 2#xz,RM. 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: iJ!p9E*( H{VJS Jc{ >\ x!a:} 找到Tools工具,点击Open plot files in 3D chart并找到该文件 _?c7{ dNT<![X\ m53~Ysq< 打开后,选择二维平面图: zF#:Uc`C5U e&ci\x%
QQ:2987619807 Q;0g
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