-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-04-23
- 在线时间1766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。 J5Q.v; X_rv} 成像示意图 Hxc>? 首先我们建立十字元件命名为Target 2sEG#/Y= wsAb8U C_ 创建方法: BPOT!- Y$|KY/)H) 面1 : 3(*vZ 面型:plane m|]"e@SF2 材料:Air c2s73iz 孔径:X=1.5, Y=6,Z=0.075,形状选择Box LCH w. NNJQDkO-I ICG:4n(, 辅助数据: 8LuU2Lo 首先在第一行输入temperature :300K, ds{)p<LpT emissivity:0.1; :r:x|[3. m5P@F@
;uZeYY? 面2 : }<'ki
; 面型:plane lX50JJwk 材料:Air B~O<?@]d 孔径:X=1.5, Y=6,Z=0.075,形状选择Box 4>B=k "N}MhcdS FysIN~ 位置坐标:绕Z轴旋转90度, ,d^H Ag^j VPVg\K{ .+lx}#-# 辅助数据: {9Q**U`w j~9![s! 首先在第一行输入temperature :300K,emissivity: 0.1; HA&hu/mw_ jG#e%`' ,WoV)L'? Target 元件距离坐标原点-161mm; H>-{.E1bG E 429<LQI/ qR%as0; 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 7Fzr\& mMCd {t]8#[lo 探测器参数设定: >Wd_?NaI 5+(Cp3 在菜单栏中选择Create/Element Primitive /plane {aU|BdATI - Sn]` >I+p;V$@ [l~G7u.d QUz4 Kt _ZK*p+u% 元件半径为20mm*20,mm,距离坐标原点200mm。 8\?H`NN \34:]NM 光源创建: *A0d0M]cg [BEQ ~A_I 光源类型选择为任意平面,光源半角设定为15度。 w,<n5dMv ow'CwOj$ idjk uB(6 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。 L /N%ft]!T y (%y'xBP 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。 Q>G% *? JEeXoGKd vI"BNC*Q1 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。 [[ll4| mWMtz]M} 创建分析面: "|E'E"_1 +'[/eW dvAz}3p0] 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。 y7Hoy.( *(Z\"o! AU8sU?= 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。 c+##!_[9 wF*9%K'E FRED在探测器上穿过多个像素点迭代来创建热图 kJCeQK:W =8Z-ORW51 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。 #9HX"<5
将如下的代码放置在树形文件夹 Embedded Scripts, g6OPYUPg {m_y< 7T(&DOGZ 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。 P9jSLM zu,Yuq 绿色字体为说明文字, e?KzT5j: Ns\};j?TU* '#Language "WWB-COM" }>b@=5O 'script for calculating thermal image map p?4,YV|# 'edited rnp 4 november 2005 NLt"yD3t `~NjBtQ 'declarations Q&w"!N Dim op As T_OPERATION ,}l|_GGj Dim trm As T_TRIMVOLUME @z`eqG,'] Dim irrad(32,32) As Double 'make consistent with sampling 9&Z+K'$= Dim temp As Double z0|-OCmL Dim emiss As Double " z -tL Dim fname As String, fullfilepath As String O;0VKNn[' D&OskM60 'Option Explicit y-~_ W 6\ PlwM3lrj Sub Main i*T
-9IP 'USER INPUTS 60WlC0Y~u nx = 31 Fv:x>qZr@ ny = 31 NIp]n[=.q numRays = 1000 tY#Zl 54~{ minWave = 7 'microns yqP=6 maxWave = 11 'microns G\~?.s|^ sigma = 5.67e-14 'watts/mm^2/deg k^4 6lUC$B Y fname = "teapotimage.dat" ~m[Gp;pL jI9#OEH_g Print "" (#]9{C; Print "THERMAL IMAGE CALCULATION" lWBewnLKE h+j*vX/! detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 `$vf 9'\+ 7W>(T8K X\ Print "found detector array at node " & detnode xxld. j6 e2L>"/ srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 7JBr{3;eS gJ>#HEkMB Print "found differential detector area at node " & srcnode U(%6ny %\~U>3Q GetTrimVolume detnode, trm 8fK/0u^`d detx = trm.xSemiApe 9~y:K$NO dety = trm.ySemiApe $lAdh area = 4 * detx * dety 3#eAXIW[ Print "detector array semiaperture dimensions are " & detx & " by " & dety v@{VQVx Print "sampling is " & nx & " by " & ny ScmwHid:\ alBnN<UM 'reset differential detector area dimensions to be consistent with sampling Mo oxT7 pixelx = 2 * detx / nx R83PHM pixely = 2 * dety / ny
OLoo#HW SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False }rF4M1+B\ Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 $9u:Ox
2 -z%->OUu 'reset the source power t3=K>Y@w SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) Bm<tCN-4 Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" XD80]@\za .:e#!~Ki 'zero out irradiance array d<E2=WVB6 For i = 0 To ny - 1 5Fbb5`( For j = 0 To nx - 1 e*d lGK3l irrad(i,j) = 0.0 Xe(]4Ux Next j D}UgC\u Next i 3sDyB-\& f*T}Ov4 'main loop :)h4SD8Y EnableTextPrinting( False ) PF+Or ZP-9KA$" ypos = dety + pixely / 2 'ITZz n* For i = 0 To ny - 1
YdUcO.V xpos = -detx - pixelx / 2 I.`DBI#-f ypos = ypos - pixely 6X$nZM|g, &%eM EnableTextPrinting( True ) a>+m_]*JZ Print i Pon0(:#1 EnableTextPrinting( False ) wB+F/]]|N 'R99m?" 'z@]hm# For j = 0 To nx - 1 a)7&2J 735l&(3A\ xpos = xpos + pixelx o@C|*TXN zvfdfQ-i 'shift source ch0cFF^] LockOperationUpdates srcnode, True GoPMWbI7 GetOperation srcnode, 1, op [jEA|rd~} op.val1 = xpos >t.PU.OM op.val2 = ypos fd62m]X SetOperation srcnode, 1, op RN;#H_
q LockOperationUpdates srcnode, False `>RM:!m6=$ UWdqcOr raytrace 9Vt6);cA-] DeleteRays ;Rm';IW$
CreateSource srcnode UQWv) TraceExisting 'draw -^8OjGat ^x_.3E3Q 'radiometry -w'g0/fD For k = 0 To GetEntityCount()-1 )*7{%Ilq If IsSurface( k ) Then SCfk!GBVD temp = AuxDataGetData( k, "temperature" ) n"Jj'8k emiss = AuxDataGetData( k, "emissivity" ) `iEYq0} If ( temp <> 0 And emiss <> 0 ) Then T8x /&g'' ProjSolidAngleByPi = GetSurfIncidentPower( k ) Zjs,R{ frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) oeI[x irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi Wul8ej: End If ucbtPTFYvr zB\ 8<97C End If %:dd#';g .mOm@<Xdg Next k f<R
3ND) _ -,[U{ Next j @9k3}x K /Wdrpv-%,1 Next i h645;sb0 EnableTextPrinting( True ) ?wjk=hM2 r\y\]AmF 'write out file ]n$ v ^ fullfilepath = CurDir() & "\" & fname rERtOgi Open fullfilepath For Output As #1 Lf{pTxKr Print #1, "GRID " & nx & " " & ny =YtK@+| i Print #1, "1e+308" [T,Df& Print #1, pixelx & " " & pixely 9>_VU"T Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 `eGp.[ffT ?pA_/wwp maxRow = nx - 1 #X6=`Xe# maxCol = ny - 1 j}8^gz] For rowNum = 0 To maxRow ' begin loop over rows (constant X) /N@NT/.M< row = "" HhzP Kd For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) 3@<m/% row = row & irrad(colNum,rowNum) & " " ' append column data to row string .&K?@T4l Next colNum ' end loop over columns _sHeB7K c|4_nT
2 Print #1, row ](IOn:MuDE *6v5JH&K Next rowNum ' end loop over rows F-$NoEL Close #1 p%OVl[^jp jank<Q&w Print "File written: " & fullfilepath d 5hx%M Print "All done!!" >q&e.-qL End Sub -{yG+1 XW{cC`&
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: }E)t,T> y cWY.HD F<)f&<5E- 找到Tools工具,点击Open plot files in 3D chart并找到该文件 mrVN&. swhtlc@@ cr^R9dv 打开后,选择二维平面图: lI5>d(6p kioIyV\=
|