-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-11-26
- 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\1:1ucV o
m{n"cg 成像示意图 &?`d8\z 首先我们建立十字元件命名为Target _umO)]Si 1xFhhncf 创建方法: iTKG,$G yK @X^jf 面1 : PBPJ/puW 面型:plane } (GQDJp 材料:Air Oy?iAQ+ 孔径:X=1.5, Y=6,Z=0.075,形状选择Box :5q*46n Z3u""oM/ *;\
K5 辅助数据: \nWzn4f 首先在第一行输入temperature :300K, nvUkbmZG# emissivity:0.1; Is,*qrl : +Qb2LR Qh1Kl_a?Lv 面2 : RmCn&-i 面型:plane 7W>}7 材料:Air ' /@!"IXz 孔径:X=1.5, Y=6,Z=0.075,形状选择Box ?tal/uC iz,q8}/( .J7-4 位置坐标:绕Z轴旋转90度, $F
/p8AraK +kdU%Sm .+yJh 辅助数据: FdK R{dX} ggYIq*4 首先在第一行输入temperature :300K,emissivity: 0.1; c,u$tnE) 5qODS_Eq Zj /H3,7 Target 元件距离坐标原点-161mm; =f{Z~`3 \-`oFe" A.'`FtV 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 =tvm= ^PCL^]W
5G]#'tu 探测器参数设定: , K"2tb enfu%"(K) 在菜单栏中选择Create/Element Primitive /plane A_4\$NZ^ *rMN,B@ ^_#gIT\ "~,(Xa3x \2LA%ZU ?;r7j V/`j 元件半径为20mm*20,mm,距离坐标原点200mm。 w|U@jr*H] D3Ea2}8 光源创建: f@V{}&ZWp *dn-,Q%` 光源类型选择为任意平面,光源半角设定为15度。 )F9%^a( V1+o3g{} f~(^|~ZT 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。 I$P7%} eC1c`@C: 我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线。 o@V/37! 0a;FX0S& GmWQJY X\ 功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 ~'YSVx& ) W9V=hQ2 创建分析面: !*QA;*e 0O9
Lg} hE3jb.s(> 到这里元件参数设定完成,现在我们设定元件的光学属性,在前面我们分别对第一和第二面设定的温度和发射系数,散射属性我们设定为黑朗伯,4%的散射。并分别赋予到面一和面二。 1oVD Oo ',-X#u
N`mC_) 到此,所有的光学结构和属性设定完成,通过光线追迹我们可以查看光线是否可以穿过元件。 9$w)_RX9W &cv/q$W4 FRED在探测器上穿过多个像素点迭代来创建热图 =GS_ G;Dz Y~\xWYR FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 kTe<1^,m 将如下的代码放置在树形文件夹 Embedded Scripts, hQRc,d6x5 3 mMdq*X5 Mh@ylp+q 打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 }jy7,+ }lbx 绿色字体为说明文字, !"qEB2r j1C0LP8 '#Language "WWB-COM" bsS|!KT 'script for calculating thermal image map 5;%xqdD 'edited rnp 4 november 2005 O9 r44ww J'&?=| 'declarations 'aSORVq^e[ Dim op As T_OPERATION J +Y|# U Dim trm As T_TRIMVOLUME iO#xIl< Dim irrad(32,32) As Double 'make consistent with sampling lu(Omds+ Dim temp As Double )9P Dim emiss As Double 9#ay(g Dim fname As String, fullfilepath As String
(Y?yGq/ x-P_}}K 79 'Option Explicit uqH! eN5 8XXTN@&, Sub Main C]@B~X1H^ 'USER INPUTS hYQ%|CBXBR nx = 31 A=>6$L];' ny = 31 ]?5@ObG numRays = 1000 %JU23c* minWave = 7 'microns %x)U8 maxWave = 11 'microns [&59n,R` sigma = 5.67e-14 'watts/mm^2/deg k^4 Z\yLzy#8 fname = "teapotimage.dat" +Gs;3jC^ J~ rC Print "" #k]0[;1os Print "THERMAL IMAGE CALCULATION" YmF(o {+59YO detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 ;5S7_p2]j +2enz!z#k Print "found detector array at node " & detnode G&B}jj R3=E?us! srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 @MVZy
Rf$6}F
Print "found differential detector area at node " & srcnode $e,!fB;B [?(W7 GetTrimVolume detnode, trm uy28=BE detx = trm.xSemiApe 3om7LqcRo dety = trm.ySemiApe zTzG&B- area = 4 * detx * dety k3eN;3#& Print "detector array semiaperture dimensions are " & detx & " by " & dety 2]KPW*V Print "sampling is " & nx & " by " & ny 3W00,f^9 JVYYwA^. 'reset differential detector area dimensions to be consistent with sampling ))zaL2UP. pixelx = 2 * detx / nx 745PCC'FK pixely = 2 * dety / ny 6:X\vw SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False T7X2$ ' Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 U9%nku4 %zVv3p: 'reset the source power yr DYw T SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) \M^4Dd Ay Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" BAed [ }tq9 /\ 'zero out irradiance array OF}_RGKg3 For i = 0 To ny - 1 :jCaDhK For j = 0 To nx - 1 ;0{*V5A irrad(i,j) = 0.0 oMf h|B Next j 2(x KE_| Next i IKj1{nZvDc k !r z8S" 'main loop f2XD^:Gc EnableTextPrinting( False ) 5Uz(Bi AE~}^(G` ypos = dety + pixely / 2 7guxkN# For i = 0 To ny - 1 }e|]G,NZO xpos = -detx - pixelx / 2 |bUmkw ypos = ypos - pixely ou4?`JF)- %gB0D8,vo EnableTextPrinting( True ) x=+H@YO\ Print i |]^! 4[!U EnableTextPrinting( False ) =v;@w$# $9$NX/P S}yb~uc, For j = 0 To nx - 1 W{2y*yqY ZmF32Ir xpos = xpos + pixelx 6f1Y:qK'@ cV,URUD 'shift source VNfx>&` LockOperationUpdates srcnode, True ax }Xsk_ GetOperation srcnode, 1, op g_=ZcGC op.val1 = xpos 6FAP *V; op.val2 = ypos 1EB`6_>y SetOperation srcnode, 1, op $x0F(|wxt LockOperationUpdates srcnode, False L@uKE jR s)=7tHoqB) raytrace P40eK0e6 DeleteRays <ZEll[0L CreateSource srcnode 1NJ|%+I TraceExisting 'draw %&NK|M+n 6UTdy1Qq> 'radiometry vN+!l3O For k = 0 To GetEntityCount()-1 %UhF=C If IsSurface( k ) Then H|?`n
uiD temp = AuxDataGetData( k, "temperature" ) (d\bSo$] emiss = AuxDataGetData( k, "emissivity" ) l"Q8` If ( temp <> 0 And emiss <> 0 ) Then 6= D;K.! ProjSolidAngleByPi = GetSurfIncidentPower( k ) A5\S0l$Q frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) ?U[AE -* irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi 9wzYDKN} End If pDT6>2t nz+KA\iW End If 75ob1h" `MS=/x E Next k (Nf.a4O d)HK9T|B Next j I
Cs1= -W,b*U Next i fq'Of
wT EnableTextPrinting( True ) !h~\YE) jrR~V* :k 'write out file R
_%pR_\ fullfilepath = CurDir() & "\" & fname b6ddXM\Z Open fullfilepath For Output As #1 0v?,:]A0E Print #1, "GRID " & nx & " " & ny ?aui q Print #1, "1e+308" 8jk*N Print #1, pixelx & " " & pixely bC|~N0b Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 |SmN.*&(9 82<!b]^1 maxRow = nx - 1 IYFA>*Es maxCol = ny - 1
AHb
For rowNum = 0 To maxRow ' begin loop over rows (constant X) Y|L57F row = "" n1|%xQBU@ For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) Et(prmH row = row & irrad(colNum,rowNum) & " " ' append column data to row string P!/8 Next colNum ' end loop over columns qA42f83 SF7Kb `>Y Print #1, row ?.H*!u+9> ,&$Y2+ Next rowNum ' end loop over rows 9UZX+@[F Close #1 J.*=7zmw %F7k| Na Print "File written: " & fullfilepath %9K@`v- Print "All done!!" ScD9Ct*):C End Sub +q;^8d> BeRn9[ 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: )Z#7%,o Ic*Q(X e)M1$ 找到Tools工具,点击Open plot files in 3D chart并找到该文件 F&Gb[Q&a8 [,c>-jA5 =J,:j[D( 打开后,选择二维平面图: Z=xrjE Ni`qU(I'|
|