-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-12-01
- 在线时间1892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。 d?oupW}uu hW~,Uqy 成像示意图 gLsl/G 首先我们建立十字元件命名为Target ZK27^oG hWJ\dwF 创建方法: ^e"BY( Gk;==~ 面1 : d0Py[37V 面型:plane J*-m!0 5 材料:Air )r~$N0\D 孔径:X=1.5, Y=6,Z=0.075,形状选择Box `ihlKFX W|NzdxCY f` 2W}|(jA 辅助数据: _SY<(2s]B 首先在第一行输入temperature :300K, $LRvPan` emissivity:0.1; _'ltz!~ mEa\0oPGB @g
}r*U? 面2 : c+f~>AaI 面型:plane JX7_/P 材料:Air O"<D0xzF? 孔径:X=1.5, Y=6,Z=0.075,形状选择Box izebQVQO* |P$tLOrG Uq<c+4)5 位置坐标:绕Z轴旋转90度, 3Nd&*QSV vDV`!JU
W2O
=dG` 辅助数据: ^o,P>u!9 r,(rWptf4 首先在第一行输入temperature :300K,emissivity: 0.1; ?SK1*; i |#D3~au
M`-#6,m3 Target 元件距离坐标原点-161mm; J/>Y mi, {CG%$rh Yz us= 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 = 7d{lK cgNK67"( .}&bE1 探测器参数设定: 3V?JX5X\ 3BAls+<p o 在菜单栏中选择Create/Element Primitive /plane 3Wa^:8N 3lcd:= TppR \[4] 7;:R\d6iL a[Ah g,h'K 元件半径为20mm*20,mm,距离坐标原点200mm。 0k>bsn/j {u{n b3/jl 光源创建: bX6eNk-L $bI VD 光源类型选择为任意平面,光源半角设定为15度。 1//d68*" &m&Z^CA w6zB uW 我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 @;_xFL;{g 5Mf bO3 我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线。 VI:
!# S@*lI2 qF C0$:z& 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。 @W[`^jfQ :*u .=^ 创建分析面: M>nplHq
rJH u~/_Dq Jz(wXp
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。 BF{v0Z0/}k HR]*75}e =&jLwy 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。 3qwi)nm 7TD%vhbiwi FRED在探测器上穿过多个像素点迭代来创建热图 LfOXgn\ [vh&o-6 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。 _;/onM 将如下的代码放置在树形文件夹 Embedded Scripts, m%hI@' <Dojl
#
b)/, 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。 0`VA}c Teh
_ 绿色字体为说明文字, ,j\1UAa Kq&b1x '#Language "WWB-COM" YaU)66=u 'script for calculating thermal image map ncZ5r0 'edited rnp 4 november 2005 qp$Td<'Y NrA?^F 'declarations V|[Y9<* Dim op As T_OPERATION m%au* 0p Dim trm As T_TRIMVOLUME <*k]Aa3y Dim irrad(32,32) As Double 'make consistent with sampling zt,pV\| Dim temp As Double x.W93e[]H Dim emiss As Double 4+46z| Dim fname As String, fullfilepath As String d h5% v3>jXf 'Option Explicit <4UF/G) "g}m xPe Sub Main T6_LiB@ 'USER INPUTS r0jhIE# nx = 31 ]$7dkP ny = 31 y/{&mo1\ numRays = 1000 K 6 D3 minWave = 7 'microns fP 4 maxWave = 11 'microns X|]&K sigma = 5.67e-14 'watts/mm^2/deg k^4 4FLL*LCNX fname = "teapotimage.dat" cl3@+v1 <;) qyP Print "" 3s25Rps Print "THERMAL IMAGE CALCULATION" O$SQzLZx& V% -wZL/ detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 >Vp# wP-BaB$_ Print "found detector array at node " & detnode lO)-QE+ Qmbl_# srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 j\SvfZ0" ;<^t)8E Print "found differential detector area at node " & srcnode %#gHa En&`m GetTrimVolume detnode, trm \M(#FS detx = trm.xSemiApe *Y"j 0Yob dety = trm.ySemiApe #\DKU@|h area = 4 * detx * dety .MUoNk! Print "detector array semiaperture dimensions are " & detx & " by " & dety FH Hi/yh Print "sampling is " & nx & " by " & ny BBkYc:B=SA #21t8 'reset differential detector area dimensions to be consistent with sampling #0*OkZMt pixelx = 2 * detx / nx (>.+tq} pixely = 2 * dety / ny JY6&CL`C SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False *.g@6IkAQ Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 j=>:{`*c #}y(D{z c 'reset the source power 8y$c\Eu(mF SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) <OR f{ Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" 6xfG`7Az 9pY`_lxa> 'zero out irradiance array ;_]Z3 For i = 0 To ny - 1 U`25bb1Wj For j = 0 To nx - 1 `y%1K|Y= irrad(i,j) = 0.0 @20~R/vh Next j OsSGVk #Qh Next i estDW1i) %+Az
X 'main loop ]Sl]G6#Iwv EnableTextPrinting( False ) f*uD9l%/ iD/r8_} ypos = dety + pixely / 2 'OERW|BO For i = 0 To ny - 1 ~sk{O%OI xpos = -detx - pixelx / 2 \@%sX24 D ypos = ypos - pixely S zqY@ ;R#:? r;t EnableTextPrinting( True ) k~P{Rm;F Print i +0)zB;~7 EnableTextPrinting( False ) ? FlV<nE"J "@h 5
SF \Gzo^w For j = 0 To nx - 1 fD>0 h3z=tu[' xpos = xpos + pixelx >mWu+Nn: ,vN0Jpf}\8 'shift source jT6zpi~]E LockOperationUpdates srcnode, True slV7,4S&! GetOperation srcnode, 1, op qrq9NPf op.val1 = xpos s3.,
N| op.val2 = ypos 02_37!\ SetOperation srcnode, 1, op x>E**a?!L LockOperationUpdates srcnode, False ^mNPP:%iN @Z50S 8 raytrace 9Ytd E*,k DeleteRays pPezy: CreateSource srcnode Sn_zhQxG TraceExisting 'draw Q<e`0cu|p TLkJZ4}?Q 'radiometry *C 0gpEf9S For k = 0 To GetEntityCount()-1 $!msav If IsSurface( k ) Then HJ\CGYmyz temp = AuxDataGetData( k, "temperature" ) qtv>`:neB emiss = AuxDataGetData( k, "emissivity" ) c=-2c&=& If ( temp <> 0 And emiss <> 0 ) Then H=7z d|W ProjSolidAngleByPi = GetSurfIncidentPower( k ) 1f.xZgO/2 frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) $_.m< irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi ElEa*70~g End If gw1|
?C h0N*hx End If .)wj{(>TJ CwV1~@{- Next k SwDUg}M~ >QusXD"L> Next j ;-G!jWt6Zi yk5T"#'+ Next i p2=Sbb EnableTextPrinting( True ) ,8F?v~C xYMNyj~ 'write out file mndUQN_Gb fullfilepath = CurDir() & "\" & fname zn4Yo Open fullfilepath For Output As #1 @QAyXwp Print #1, "GRID " & nx & " " & ny J)l]<## Print #1, "1e+308" G0^O7w^5 Print #1, pixelx & " " & pixely GM/3*S$c Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 lRn6Zh 'z#{'`$a maxRow = nx - 1 -9S.G maxCol = ny - 1 n9zS'VU For rowNum = 0 To maxRow ' begin loop over rows (constant X) VesO/xG< row = "" *5i~N} For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) tk^1Ga3 row = row & irrad(colNum,rowNum) & " " ' append column data to row string zN\~v Next colNum ' end loop over columns Q7y6</4f RRD\V3C84 Print #1, row %@!Vx ^}2 ie| Next rowNum ' end loop over rows
/D[GXX Close #1 !Xwp;P= 'DQp Print "File written: " & fullfilepath ?80@+y] Print "All done!!" Ne]/ sQ0 End Sub
,i2%FW B;8YX>r 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: JH~v e .P=uR8 JlsRP 找到Tools工具,点击Open plot files in 3D chart并找到该文件 ^i{B8]2, S.+)">buH i3.8m=> 打开后,选择二维平面图: r\Wp\LfY&{ _"Q
+G@@
|