-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-12-10
- 在线时间1894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。 FyD^\6/x &%J+d"n( 成像示意图 @;>i3? 首先我们建立十字元件命名为Target ]j.=zQP?' 81?7u!=ic+ 创建方法: vwy10PlqL w1Ar[
P 面1 : HqM>K*XKU 面型:plane P$l-p'U- 材料:Air 0LI:R'P+P[ 孔径:X=1.5, Y=6,Z=0.075,形状选择Box 0u0<)gdX 9J>b6 Ve/"9?Y_ 辅助数据: F.;G6 首先在第一行输入temperature :300K, lIR0jgP@z emissivity:0.1; Jt-s6-2 YA(_*h
n0nf;E 面2 : F\pw0^K;N 面型:plane dFdll3bC 材料:Air ?Q$LIoR 孔径:X=1.5, Y=6,Z=0.075,形状选择Box JiFy.Pf r]! <iw 2kv%k3Q{ 位置坐标:绕Z轴旋转90度, 00DWXGt20o 1-z*'Ghys *7`N^e 辅助数据: _W@SCV)yH Y-8qAF?SJ] 首先在第一行输入temperature :300K,emissivity: 0.1; !AR$JUnX iQ[0d.(A R<r"jOd] Target 元件距离坐标原点-161mm; m>po+7"b 79.J`}# @(:ah 单透镜参数设定:F=100, bend=0, 位置位于坐标原点 re.%$D@ TmN}TMhZ WZ.d"EE" 探测器参数设定: 6k#H>zY, $}[Tj0+: 在菜单栏中选择Create/Element Primitive /plane ~cE; k@ +n1jP<[<N E\M{/.4 4 rWN#QL()* Bx(+uNQ KR 元件半径为20mm*20,mm,距离坐标原点200mm。 FV[6">;g ++KY+j.^ 光源创建: =hV-E
D f;/t7=>d 光源类型选择为任意平面,光源半角设定为15度。 Z=: oIAe niO(> !'14mN#A 我们将光源设定在探测器位置上,具体的原理解释请见本章第二部分。 #unE>#DW b0a'Y"oef4 我们在位置选项又设定一行的目的是通过脚本自动控制光源在探测器平面不同划分区域内不同位置处追迹光线。 Z$R2Z$f k&nhF9Y4 !$q1m@K1 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。 (vIrXF5Dnj 'e6W$?z 创建分析面: `Tzqvnn "?j|;p@!> "X']_:F1a 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。 UQ|zSalv, ;WIL?[;w ~qNpPIrGr 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。 $Z;HE/3 ?`F")y FRED在探测器上穿过多个像素点迭代来创建热图 (4V1%0 FV/xp}nz FRED具有一个内置的可编译的Basic脚本语言。从Visual Basic脚本语言里,几乎所有用户图形界面(GUI)命令是可用这里的。FRED同样具有自动的客户端和服务器能力,它可以被调用和并调用其他可启动程序,如Excel。因此可以在探测器像素点上定义多个离轴光源,及在FRED Basic脚本语言里的For Next loops语句沿着探测器像素点向上和向下扫描来反向追迹光线,这样可以使用三维图表查看器(Tools/Open plot files in 3D chart)调用和查看数据。 {nQ}t
}B 将如下的代码放置在树形文件夹 Embedded Scripts, _ED1".f H+zn:j@~L f{e*R#+& 打开后清空里面的内容,此脚本为通用脚本适用于一切可热成像的应用。 @ ADY? V,qZF=} S 绿色字体为说明文字, aMTY{ [BhpfZNKRA '#Language "WWB-COM" f5a%/1? 'script for calculating thermal image map gB3&AQ 'edited rnp 4 november 2005 e,E;\x
& K/[v>(< 'declarations U]sU
b3 Dim op As T_OPERATION /2u;w!oi. Dim trm As T_TRIMVOLUME f/)3b`$Wu Dim irrad(32,32) As Double 'make consistent with sampling AW'tZF" Dim temp As Double Coq0Kzhsab Dim emiss As Double ZP)=2'RY Dim fname As String, fullfilepath As String BN4dr9T :0T]p"y4 'Option Explicit n#3y2,Ml {CH\TmSz Sub Main ^J>28Q\S 'USER INPUTS nVG\*#*]| nx = 31 |~H'V4)zXu ny = 31 $#4z>~0 numRays = 1000 _0F6mg n minWave = 7 'microns (p} N9n$ maxWave = 11 'microns sSG]I%oB3 sigma = 5.67e-14 'watts/mm^2/deg k^4 62EJ# q[ fname = "teapotimage.dat" M
_U$I7 S=aXmz< Print "" j~DoMP5Ls Print "THERMAL IMAGE CALCULATION" 3|:uIoR{
lO,
2 detnode = FindFullName( "Geometry.Detector.Surface" ) '找到探测器平面节点 v,>F0ofJ qw87B!D Print "found detector array at node " & detnode *ep!gT*4 $
O!f*lG srcnode = FindFullName( "Optical Sources.Source 1" ) '找到光源节点 k9 *0xukJ KvilGh10 Print "found differential detector area at node " & srcnode qUtVqS C,PCU <q GetTrimVolume detnode, trm 2L<TqC{,- detx = trm.xSemiApe oU~V0{7g dety = trm.ySemiApe 1rPeh{SZ area = 4 * detx * dety LO"HwN43h Print "detector array semiaperture dimensions are " & detx & " by " & dety iI&SI#;
_ Print "sampling is " & nx & " by " & ny >4EcV1y nBiSc* 'reset differential detector area dimensions to be consistent with sampling M~662]Ekk pixelx = 2 * detx / nx ?7&VT1 pixely = 2 * dety / ny 9: ~,TH SetSourcePosGridRandom srcnode, pixelx / 2, pixely / 2, numRays, False ZQBo|8* Print "resetting source dimensions to " & pixelx / 2 & " by " & pixely / 2 0jq&i#yNB 95]%j\ 'reset the source power ^\+6*YE 4 SetSourcePower( srcnode, Sin(DegToRad(15))^2 ) %\b5)p Print "resetting the source power to " & GetSourcePower( srcnode ) & " units" %oor7 -l DBmcvC 'zero out irradiance array }Xc|Z.6 For i = 0 To ny - 1 b1*6) For j = 0 To nx - 1 W)4xO>ck*3 irrad(i,j) = 0.0 |e< U %v Next j q',a7Tf: Next i >a4Bfnf"eI wG{obsL.! 'main loop 1~`gfHI4 EnableTextPrinting( False ) ]hf4= gm a|s= d ypos = dety + pixely / 2 ,}2j
Fb9z4 For i = 0 To ny - 1 H>7!+&M xpos = -detx - pixelx / 2 t3s}U@(C ypos = ypos - pixely zIAMM ~r>UjC_
B: EnableTextPrinting( True ) _SFD}w3b$ Print i (u'/tNGS EnableTextPrinting( False ) #ASu
SQ >y8Z{ALQ5 6nq.~f2` For j = 0 To nx - 1 ZR QPOy ;q^YDZ' xpos = xpos + pixelx J2cNwhZ 11-uJVO~* 'shift source vCmh3TQ LockOperationUpdates srcnode, True eD(a
+El} GetOperation srcnode, 1, op +_}2zc4 op.val1 = xpos ~Igo
8ykl op.val2 = ypos /nmfp&@ SetOperation srcnode, 1, op ,pG63&?j LockOperationUpdates srcnode, False z`2d(KE? =lmh^**4 'raytrace >S3 >b DeleteRays |$w-}$jq5 CreateSource srcnode e.kt]l TraceExisting 'draw jXDo!a|4y K*}j1A 'radiometry vVf!XZF For k = 0 To GetEntityCount()-1 V9bLm,DtT If IsSurface( k ) Then r 1a{Y8? temp = AuxDataGetData( k, "temperature" ) enrmjA&3 emiss = AuxDataGetData( k, "emissivity" ) Oxvw`a# If ( temp <> 0 And emiss <> 0 ) Then #3$|PM7,_ ProjSolidAngleByPi = GetSurfIncidentPower( k ) 3gh^a;uC frac = BlackBodyFractionalEnergy ( minWave, maxWave, temp ) ^KF'/9S irrad(i,j) = irrad(i,j) + frac * emiss * sigma * temp^4 * ProjSolidAngleByPi {p\KB!Y- End If t8+93,*B +]zP $5_e End If 6qDD_:F %jf gncW Next k
'ng/A4 od fu7P_ Next j _L72Ae(_ igL^k`&5^" Next i CUG<v3\ EnableTextPrinting( True ) 1GdgF?4 s#fmGe"8 'write out file f$'D2o, O fullfilepath = CurDir() & "\" & fname K7Vr$,p Open fullfilepath For Output As #1 aKy|$
{RC Print #1, "GRID " & nx & " " & ny T{M:)}V Print #1, "1e+308" /km3L7L%R Print #1, pixelx & " " & pixely
f#nmr5F Print #1, -detx+pixelx/2 & " " & -dety+pixely/2 y_&XF>k91 gD\}CxtG maxRow = nx - 1 /{va< |