-
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。 \(7# N<-
(DaP~*c3cC 成像示意图 vh{1u 首先我们建立十字元件命名为Target
Tee3U%Y n7YWc5:CaL 创建方法: :usBeho f(ec/0W 面1 : T%vbD*nt. 面型:plane tf}Q%)`f 材料:Air Tqh Rs 孔径:X=1.5, Y=6,Z=0.075,形状选择Box $">NW&
i( lkJ#$Ik& vM;dPE7 辅助数据: kFs kn55 首先在第一行输入temperature :300K, dM;WG;8e emissivity:0.1; 42[:s: @<{#v.T &ZFAUE,[ 面2 : @V
CQ4X7T 面型:plane /
{bK*A! 材料:Air X#C7r@H 孔径:X=1.5, Y=6,Z=0.075,形状选择Box z:,!yU c 0r&9AnnWu+ YU"\Wd[ 位置坐标:绕Z轴旋转90度, |(8h:g "TNUw&ih `r bqYU0 辅助数据: >~8Df61o` y:Ab5/bHy 首先在第一行输入temperature :300K,emissivity: 0.1; vF\zZ<R/ j`pR;XL1[ Nm.>C4 Target 元件距离坐标原点-161mm; $7
Uk;xV -L<Pm(v& $?Mz[X 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 L2A#OZZu O
lIH0 $
T_EsnN 探测器参数设定: UR=s{nFd Qz$Dv@*y\ 在菜单栏中选择Create/Element Primitive /plane < tq9 ;;H:$lx &Rt]K 0PbIWy' }iloX# %dR./{txT 元件半径为20mm*20,mm,距离坐标原点200mm。 #a l^Uqd -+Dvyr 光源创建: ^( VB5p
AWNd(B2o 光源类型选择为任意平面,光源半角设定为15度。 U.0/r!po nU *fne? X'4
Yofs 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。 1"6k5wrIA LK5H~FK 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。 8{<cqYCR &3?yg61Ag =^M t#h." 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。 JOq<lb= aH"c0A 创建分析面: .AW*7Pp`f :_zKUv] C(Y6t1 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。 :.Sc[UI0 g3 rFJc DNe^_v)]| 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。 @>j \~<% *xC ' FRED在探测器上穿过多个像素点迭代来创建热图 #OTsD+2Za= h)`vc#"65k 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。 \LXC269 将如下的代码放置在树形文件夹 Embedded Scripts, rI789q yBiwYk6 +60;z4y}w 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。 NR@Tj]`k [40 YoVlfM 绿色字体为说明文字, TI b1o(CG(}* '#Language "WWB-COM" k 'b|#c9c 'script for calculating thermal image map h`j gF 'edited rnp 4 november 2005 PEl]HI_H 7mNskb| 'declarations /B7
GH5 Dim op As T_OPERATION WG{/I/bJ_ Dim trm As T_TRIMVOLUME 9@B+$~:}7 Dim irrad(32,32) As Double 'make consistent with sampling A-$BB=Ot Dim temp As Double eX@q'Zi Dim emiss As Double m`"s$\fah Dim fname As String, fullfilepath As String )O
Cr6UR 0k 8SDRWU 'Option Explicit uBgHtjmae )Cl&"bX Sub Main 0]~n8mB> 'USER INPUTS `-\"p;Hp0 nx = 31 s#[Ej&2[= ny = 31 zL'n
J numRays = 1000
"kC>EtaX minWave = 7 'microns |93%, maxWave = 11 'microns iz(+(M sigma = 5.67e-14 'watts/mm^2/deg k^4 =qvU9p2o fname = "teapotimage.dat" Vp$ckr (" %yV_R Print "" cD6o8v4]] Print "THERMAL IMAGE CALCULATION" 0a'y\f:6* %9.KH detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 FzIA>njt vrGNiGIi[ Print "found detector array at node " & detnode HApP*1J^c V2.K*CpZ7 srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 ngjbE+ elN3B91\6r Print "found differential detector area at node " & srcnode e1-=|!U7# .YkKIei GetTrimVolume detnode, trm ;xc detx = trm.xSemiApe J:(l& dety = trm.ySemiApe #a&Vx&7L area = 4 * detx * dety HChewrUAn Print "detector array semiaperture dimensions are " & detx & " by " & dety "e"`Or Print "sampling is " & nx & " by " & ny ^ytd~iK8 ES> 3Cf 'reset differential detector area dimensions to be consistent with sampling j;
C(:6#J pixelx = 2 * detx / nx wF(FV4#gs pixely = 2 * dety / ny n_<]9 SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False ~gc)Ww0(Q Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 Fk43sqU6~ [~3p+ 'reset the source power {IVqV6: SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) DiX4wmQ Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" i/L1KiCLx [xC
(t]S- 'zero out irradiance array oKac~}_KL For i = 0 To ny - 1 `3-j%H2R For j = 0 To nx - 1 UgP5^3F2 irrad(i,j) = 0.0 a
srkuAS Next j |&JL6hN Next i tv2dyC&a OW>U5 \q 'main loop Tla*V#:Ve EnableTextPrinting( False ) jd{J3s '% m8?(.BJ% ypos = dety + pixely / 2 b}
*cw2 For i = 0 To ny - 1 'K1w.hC< xpos = -detx - pixelx / 2
Du/s ypos = ypos - pixely 7\xa_nrI ziOmmL(r EnableTextPrinting( True ) wmIq{CXx, Print i Y5
dt?a EnableTextPrinting( False ) -4]6tt'G tL~|/C)d R r\]WDX!` For j = 0 To nx - 1 4u&doSXR P7o6B,9 xpos = xpos + pixelx ~(8A&!#,! c(jA"K[|b 'shift source cZYX[.oIB LockOperationUpdates srcnode, True Rq7ks To GetOperation srcnode, 1, op ubLLhf op.val1 = xpos ,rd+ dN op.val2 = ypos DXUI/C f SetOperation srcnode, 1, op !qR(Rn LockOperationUpdates srcnode, False )Mok$ Q,$x6YwE raytrace sxqXR6p{ DeleteRays Rz)#VVYC= CreateSource srcnode /~yqZD<O TraceExisting 'draw Cw_<t
Oe27 3Y^e 'radiometry ,[~EThcq For k = 0 To GetEntityCount()-1 Ort\J~O If IsSurface( k ) Then V)]&UbEL| temp = AuxDataGetData( k, "temperature" ) !cpBX>{w emiss = AuxDataGetData( k, "emissivity" ) WC4Il
C If ( temp <> 0 And emiss <> 0 ) Then k@2gw]y" ProjSolidAngleByPi = GetSurfIncidentPower( k ) 82<L07fB frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) FD*y[A
? irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi ':,LZ A8A End If wFvilF
V mVkn~LD:0 End If k\lj<v<vD 6k[u0b` Next k +)|2$$m N_>s2 Next j _Sg29qFK $5A XE;~{ Next i |Mh;k6 EnableTextPrinting( True ) 1pn167IQL uODsXi{z 'write out file t@ Jo ?0s fullfilepath = CurDir() & "\" & fname uPqPoI>N! Open fullfilepath For Output As #1 d+^;kse Print #1, "GRID " & nx & " " & ny %:y-"m1\u$ Print #1, "1e+308" eAqQ~)8^ Print #1, pixelx & " " & pixely i{8=; Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 o _-t/
? <Z&gAqj 2 maxRow = nx - 1 N*x gVj* maxCol = ny - 1 56)B/0= For rowNum = 0 To maxRow ' begin loop over rows (constant X) ij TtyTC row = "" !nu['6I% For colNum = maxCol To 0 Step -1 ' begin loop over columns (constant Y) l>G#+#{ row = row & irrad(colNum,rowNum) & " " ' append column data to row string jfWIPN Next colNum ' end loop over columns o{
(v @|^Ch+%@ Print #1, row %ry>p(-pC( 8RK\B%UW Next rowNum ' end loop over rows `i{ :mio Close #1 6?74l; b,'./{c0 Print "File written: " & fullfilepath 6R<%.-qr Print "All done!!" :G-1VtE n End Sub QZ`<+"a0 *be+x RY 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: 4qMHVPJv\ Oe#k| Vs"Z9p$U 找到Tools工具,点击Open plot files in 3D chart并找到该文件 qM`SN4C C
}[u[) $?A]!Y; 打开后,选择二维平面图: L{=z}QO A(uN=r@O
|