-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2026-01-09
- 在线时间1913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。 z|*6fFE "v!HKnDT 成像示意图 IGT_
5te 首先我们建立十字元件命名为Target p,\bez
vw]
D{OBv* 创建方法: FM"BTA:C lO> 7`2x=F 面1 : /kU@S 面型:plane Y&f[2+?2NK 材料:Air &6=ZT:.6Te 孔径:X=1.5, Y=6,Z=0.075,形状选择Box YwWTv L"7`
\4 %@93^q[\2 辅助数据: j :Jdwf 首先在第一行输入temperature :300K, ?{,)XFck emissivity:0.1; h_G|.7! dG>Wu o C$G88hesn 面2 : -!G#")< 面型:plane `OReSg
2 材料:Air 6XL9
qb~X 孔径:X=1.5, Y=6,Z=0.075,形状选择Box _8pkejg TL{pc=eBo lkWeQ)V 位置坐标:绕Z轴旋转90度, 7TPLVa=hO yn":!4U1
"rDzrz 辅助数据: ;:\,x 9Q7cUoxY 首先在第一行输入temperature :300K,emissivity: 0.1; /\uH[[s 40d9/$uzh n[:AV Target 元件距离坐标原点-161mm; \BcJDdL RyQ\5^z o p5^9`" 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 IcA\3j \]#;!6ge j X!ftm2 探测器参数设定: %3#I:>si +fCyR 在菜单栏中选择Create/Element Primitive /plane X`v79`g_ u:H 3.5)% VmH_0IM^6 CE7pg&dJ)i lyH X#] }Oh'YX#[ 元件半径为20mm*20,mm,距离坐标原点200mm。 9 c5G6n0 =']}; 光源创建: ><
_Z 19w,'}CGk 光源类型选择为任意平面,光源半角设定为15度。 9k+&fyy 7- 3N ny_ kr`$42 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}p&\w H -f;j1bQ 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。 [FV=@NI )>X|o$2 0m YZ7S5g 功率数值设定为:P=sin2(theta) theta为光源半角15度。我们为什么要这么设定,在第二部分会给出详细的公式推导。 ywQ!9 \ Jn@Mbl 创建分析面: W/ZahPPq W
"\tkh2 pGbFg& 到这里元件参数设定完成,现在我们设定元件的光学属性,在前面我们分别对第一和第二面设定的温度和发射系数,散射属性我们设定为黑朗伯,4%的散射。并分别赋予到面一和面二。 ]T3BDgu%& )3` u388Wj
到此,所有的光学结构和属性设定完成,通过光线追迹我们可以查看光线是否可以穿过元件。 L3=YlX`UL LY88;*:S FRED在探测器上穿过多个像素点迭代来创建热图 z1SMQLk )<x;ra^ FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 Aiks>Cyi23 将如下的代码放置在树形文件夹 Embedded Scripts, 400Tw`AiJ o )nT K.iH 打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 .1z$ A 9>[.= 绿色字体为说明文字, 9p\wTzA ekl?K~ '#Language "WWB-COM" 1l|A[G 'script for calculating thermal image map AR+\uD=\I- 'edited rnp 4 november 2005 U3|&Jee C>`.J_N 'declarations N9JgV,` Dim op As T_OPERATION */5<L99v Dim trm As T_TRIMVOLUME ofPF} Dim irrad(32,32) As Double 'make consistent with sampling X\3,NR, Dim temp As Double kTiPZZI Dim emiss As Double =4M.QA@lI! Dim fname As String, fullfilepath As String rMXOwkE ej"o?1l@ 'Option Explicit }KaCf,O ReB(T7Vk= Sub Main rz[uuY7 'USER INPUTS f?>-yMR| nx = 31 s7UhC.>'@ ny = 31 _sf#J|kQ numRays = 1000 8%2rgA minWave = 7 'microns A}#]g>L maxWave = 11 'microns )S wG+k, sigma = 5.67e-14 'watts/mm^2/deg k^4 J^g,jBk fname = "teapotimage.dat" =_?pOq
ENYF0wW Print "" %g]$Vfpy Print "THERMAL IMAGE CALCULATION" 6L:trLuQ :uIi
? detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 7$1fy0f[l bU:}ZO^S Print "found detector array at node " & detnode 94p:| 5@ I", &%0ycm srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 ni"$[8U e0~sUVYf Print "found differential detector area at node " & srcnode 6m-:F.k1( /+x#V!zM GetTrimVolume detnode, trm \&\_>X., detx = trm.xSemiApe 0U~;%N+lv dety = trm.ySemiApe d Y:|Ef|v( area = 4 * detx * dety 56bud3CVs Print "detector array semiaperture dimensions are " & detx & " by " & dety ]e@0T{! Print "sampling is " & nx & " by " & ny {w |dM# hr_9;,EPh 'reset differential detector area dimensions to be consistent with sampling E,<\T6/%q pixelx = 2 * detx / nx *gM,x4 Y pixely = 2 * dety / ny jIx8k8 SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False ;LQ# *NjL\ Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 B0b[p*gIl w'oo-.k 'reset the source power \uU=O
) SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) XSm"I[.g Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" tT@w%Sz57N E'e8&3!bx 'zero out irradiance array fr}1_0DDz For i = 0 To ny - 1 T}L^CU0 For j = 0 To nx - 1 E-yT irrad(i,j) = 0.0 i}/e}s<-6 Next j C%}]"0Q1 Next i :mXGIRi _KB{J7bs<a 'main loop 93W EnableTextPrinting( False ) T~i%j@Q.6 W>5vRwx00 ypos = dety + pixely / 2 AW,v For i = 0 To ny - 1 [%j?.N xpos = -detx - pixelx / 2 ^CZCZ,v ypos = ypos - pixely mF[o*N* ^[{`q9A#d EnableTextPrinting( True ) a|DsHZ^6^ Print i g$*/XSr( EnableTextPrinting( False ) jOUK]>ox: ./'~];&
0dgP For j = 0 To nx - 1 Awu$g. ,O:EX0 xpos = xpos + pixelx s?QVX~S" '|vD/Qf=& 'shift source ;{<aA 5 LockOperationUpdates srcnode, True r4O|() GetOperation srcnode, 1, op "z
rA`` op.val1 = xpos $> "J"IX op.val2 = ypos 6g5PM4\ SetOperation srcnode, 1, op &49u5&TiP LockOperationUpdates srcnode, False yXJ]U
\ % si_W:mLF{a raytrace 96(R'^kNX DeleteRays %'Zc2h&z CreateSource srcnode r55qmPhg TraceExisting 'draw ]dvPx^`d{ OFc\fW# 'radiometry *IC^IC: For k = 0 To GetEntityCount()-1 KAd_zkUA If IsSurface( k ) Then ]UDd :2yt temp = AuxDataGetData( k, "temperature" ) 10p8|9rE}B emiss = AuxDataGetData( k, "emissivity" ) 6X/wdk If ( temp <> 0 And emiss <> 0 ) Then +' %@! ProjSolidAngleByPi = GetSurfIncidentPower( k ) `E@kFJ(<On frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) KQ&Y2l1*>> irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi "`pNH' End If D^Te%qnW 'T\dkSJv;V End If i+g~ Uj}h ]eE 1n2 Next k '"y}#h__T ?w-1:NWjt Next j s f(iE(o AXs=1 e Next i >R!"P[* EnableTextPrinting( True ) tQWWgLM ipobr7G.SD 'write out file [F+(^- ( fullfilepath = CurDir() & "\" & fname LheFQ A Open fullfilepath For Output As #1 \)OEBN`9# Print #1, "GRID " & nx & " " & ny cFK @3a Print #1, "1e+308" SxJ$b Print #1, pixelx & " " & pixely Z7fg
25 Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 (89Ji'dc ;f:gX`"\ maxRow = nx - 1 \R(R9cry maxCol = ny - 1 *m9{V8Yi2 For rowNum = 0 To maxRow ' begin loop over rows (constant X) En(7(qP6} row = "" i31<].|kA* For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) e+. \pe\ row = row & irrad(colNum,rowNum) & " " ' append column data to row string DECB*9O^ Next colNum ' end loop over columns Oe51PEqn VPt9QL( Print #1, row %Tv^GP{}
.[?BlIlm Next rowNum ' end loop over rows 8TE>IPjm Close #1 WK0C p~&BChBl!= Print "File written: " & fullfilepath =7%oE[ Print "All done!!" WF2NG;f= End Sub ]ab#q= 3uV4/%U 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: 2?W7I/F |Y},V_@d ySe$4deJ 找到Tools工具,点击Open plot files in 3D chart并找到该文件 o:"anHs :]PM_V| D'b#,a;V 打开后,选择二维平面图: $d/&k` ye%iDdf
|