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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。 :q7Wy&ow yw[g!W 成像示意图 !t%j?\f 首先我们建立十字元件命名为Target _AYK435>N &)Tdc 创建方法: Ic:(Gi- % 2c,9e` 面1 : /y#f3r+*2 面型:plane e7r-R3_ 材料:Air }[};IqVaK 孔径:X=1.5, Y=6,Z=0.075,形状选择Box }6}l7x [0[i5'K: u+e{Mim 辅助数据: v
~?qz5:K~ 首先在第一行输入temperature :300K, ]^n7
emissivity:0.1; C12Fl |&nS|2.' &yTqZ*Yuk 面2 : }J`w4P 面型:plane '8.r-`l( 材料:Air Yty/3T3)e 孔径:X=1.5, Y=6,Z=0.075,形状选择Box n;Q7X>-f8` /cdC'g R)(T^V`{ 位置坐标:绕Z轴旋转90度, V)-+Fd,= V`d,qn)i L>&t|T2 辅助数据: \0I_< f:,DWw`B 首先在第一行输入temperature :300K,emissivity: 0.1; [{,T.;'<j 4Zddw0|2 {
Fb*&|-n Target 元件距离坐标原点-161mm; "]x'PI 4J d-ZJL6- SC!RbW@3 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 c(E{6g? $q{!5-e 3`|@H-c9 探测器参数设定: &|ex`nwc0 Jbg/0|1 在菜单栏中选择Create/Element Primitive /plane t?&|8SId 0[#
3;a 7\[@m3s *3FKt&v 0 vjCu4+w($Z G]tn i 元件半径为20mm*20,mm,距离坐标原点200mm。 8)3*6+D "5!oi]@>( 光源创建: |\t-g"~sN NiK4d{E& 光源类型选择为任意平面,光源半角设定为15度。 [`[|l
uEP*iPLD@ J#(LlCs?@c 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。 mh#a#< mb3"U"ohs 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。 IGQFtO/x 7#a-u<HF" rJTa 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。 o4,6.1} D|p9qe5% 创建分析面: o5GcpbZ3k 1{.|+S Z! EjR9JUu 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。 n\D&!y[]F e}7lBLK]* <w9JRpFY 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。 9YyLf ; (gU!=F?#m FRED在探测器上穿过多个像素点迭代来创建热图 iByf{ I>+ ,V m
< rK 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。 50wulGJud 将如下的代码放置在树形文件夹 Embedded Scripts, rfg'G&A( !hy-L_wL] MrFQ5:= 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。 pa3{8x{9m H@>` F 绿色字体为说明文字, P>D)7V9Hh _8J.fT$${ '#Language "WWB-COM" 8MtGlW%Eh 'script for calculating thermal image map -f^tE,- 'edited rnp 4 november 2005 q~o<*W $( kF# 'declarations q3N
jky1w Dim op As T_OPERATION P|E| $)m Dim trm As T_TRIMVOLUME "Gzz4D Dim irrad(32,32) As Double 'make consistent with sampling + GN(Ug'R Dim temp As Double ECuH%b^, Dim emiss As Double Y\P8v Dim fname As String, fullfilepath As String AeM^73t |aS.a&vwR 'Option Explicit 9;u@q%;!k xm~`7~nFR Sub Main 3jU&zw9 'USER INPUTS bsli0FJSh' nx = 31 s!zx}
5 ny = 31 '<)n8{3Q5w numRays = 1000 ;ef}}K minWave = 7 'microns my1@41
H maxWave = 11 'microns ML
9' | sigma = 5.67e-14 'watts/mm^2/deg k^4 I$G['`XX/ fname = "teapotimage.dat" V2EUW!gn
2 b_taC^-l Print "" iWkWR"ysy Print "THERMAL IMAGE CALCULATION" \*?~Yj# _;y9$"A detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 {S)6;|ua' Q3~H{)[Kq Print "found detector array at node " & detnode >Cp0.A:UC# +Kc srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 0Mm)`!TLSW K5h Print "found differential detector area at node " & srcnode BDDlQci38 2F.;;Ab GetTrimVolume detnode, trm <'oQ \eB detx = trm.xSemiApe H*R"ntI?w dety = trm.ySemiApe >tr}|> area = 4 * detx * dety q3!bky\ Print "detector array semiaperture dimensions are " & detx & " by " & dety 90rol~M& Print "sampling is " & nx & " by " & ny (?c"$|^J kDioD 'reset differential detector area dimensions to be consistent with sampling CAhXQ7w'Z pixelx = 2 * detx / nx j,eo2HaL pixely = 2 * dety / ny 2/^3WY1U SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False ~<bZ1TD Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 wn%A4-%{ U8?mc 'reset the source power g3y~bf SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) TD0
B% Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" =dKtV.L C1)!f j= 'zero out irradiance array Bwxd&;E For i = 0 To ny - 1 6bC3O4Rw For j = 0 To nx - 1 S=5o
< 1 irrad(i,j) = 0.0 ;A*]l'[- Next j a1lh-2xX Next i d$!RZHo10V NXrlk 'main loop *GPiOA
a EnableTextPrinting( False ) }Sv:`9= $U~]=.n ypos = dety + pixely / 2 TvbE2Q;/UL For i = 0 To ny - 1 /U9"wvg xpos = -detx - pixelx / 2 ON(kt3.h ypos = ypos - pixely wmLs/:~ %h!B^{0 EnableTextPrinting( True ) (!WD1w Print i X \/#@T EnableTextPrinting( False )
8d'0N + ePS14G )SGq[B6@I For j = 0 To nx - 1 t{{QE:/ \4fQMG xpos = xpos + pixelx 5.GR1kl6 j\M?~=*w 'shift source $!t4r LockOperationUpdates srcnode, True G 3ptx!
D GetOperation srcnode, 1, op gcT%c|. op.val1 = xpos s$j,9uRr op.val2 = ypos zO6oT1I SetOperation srcnode, 1, op P&Vv/D LockOperationUpdates srcnode, False d2$IH#~9B #H~64/ raytrace [4)F f DeleteRays WpvhTX CreateSource srcnode M_DwUS1? TraceExisting 'draw +ZP7{% "w<#^d_6 'radiometry K[YyBEid For k = 0 To GetEntityCount()-1 sW\!hW1*x If IsSurface( k ) Then >m\(6x8RE temp = AuxDataGetData( k, "temperature" ) p!%pP}I emiss = AuxDataGetData( k, "emissivity" ) FS.L\MjV]U If ( temp <> 0 And emiss <> 0 ) Then xAm6BB
c ProjSolidAngleByPi = GetSurfIncidentPower( k ) YoFxW5by frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) Nh+ H 9 irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi #RLt^$!H End If 4*;MJ[| F#E3q|Q"BS End If _+MJ%'>S vl)l' Next k 8&dF hDGF7 Next j )4 ;`^]F Fsg*FH7J Next i wMN]~|z> EnableTextPrinting( True ) 1$ {SRU7l COlaD"Y 'write out file l'E6CL}@[ fullfilepath = CurDir() & "\" & fname veECfR; Open fullfilepath For Output As #1 5"H=zJ=r Print #1, "GRID " & nx & " " & ny K*d Cc}:` Print #1, "1e+308" BY*8ri^u Print #1, pixelx & " " & pixely klhtKp_p Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 \_f v7Fdp{ `Q,H|hp;k; maxRow = nx - 1 j] [,J49L maxCol = ny - 1 dAj$1Ke For rowNum = 0 To maxRow ' begin loop over rows (constant X) yB6?`3A: row = "" ?aMOZn? For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) lu/
(4ED row = row & irrad(colNum,rowNum) & " " ' append column data to row string OZ;*JR: Next colNum ' end loop over columns 93hxSRw PPsE${! Print #1, row poFg1 Ek}A]zC Next rowNum ' end loop over rows e96k{C`j0 Close #1 5@W j>:w +"VP-s0 Print "File written: " & fullfilepath hpk7 Anp Print "All done!!" v &+R^iLE End Sub $ME)#( a'IdYW0 在输出报告中,我们会看到脚本对光源的孔径和功率做了修改,并最终经过31次迭代,将所有的热成像数据以dat的格式放置于: U/BR*Zn]* syK^<xa 4KrL{Z+} 找到Tools工具,点击Open plot files in 3D chart并找到该文件 k VQ\1! WX0tgXl ig &Y 打开后,选择二维平面图: #LOwGJ$yVz Y
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