Objective measurements of light trespass and surfaces Marc Gillet Prof. Rombouts (Univ. Brussels)...
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Transcript of Objective measurements of light trespass and surfaces Marc Gillet Prof. Rombouts (Univ. Brussels)...
![Page 1: Objective measurements of light trespass and surfaces Marc Gillet Prof. Rombouts (Univ. Brussels) with collabor. Univ. Berlin (prof. Kaase)](https://reader030.fdocuments.net/reader030/viewer/2022032517/56649c9d5503460f9495c762/html5/thumbnails/1.jpg)
Objective measurementsof light trespass and surfaces
Marc GilletProf. Rombouts (Univ. Brussels)
with collabor. Univ. Berlin (prof. Kaase)
![Page 2: Objective measurements of light trespass and surfaces Marc Gillet Prof. Rombouts (Univ. Brussels) with collabor. Univ. Berlin (prof. Kaase)](https://reader030.fdocuments.net/reader030/viewer/2022032517/56649c9d5503460f9495c762/html5/thumbnails/2.jpg)
Main ConclusionsMain Conclusions
1. Precise Algorithm and measurement system to calculate upward flux
2. Reduction of SKY GLOW is FIRST
A QUESTION OF PERFORMANCEA QUESTION OF PERFORMANCE
i.e REDUCE the installed lumen package for the same “lighting levels”
![Page 3: Objective measurements of light trespass and surfaces Marc Gillet Prof. Rombouts (Univ. Brussels) with collabor. Univ. Berlin (prof. Kaase)](https://reader030.fdocuments.net/reader030/viewer/2022032517/56649c9d5503460f9495c762/html5/thumbnails/3.jpg)
Main Conclusions (II)Main Conclusions (II)
Therefore :
---> interest for dimminginterest for dimming to reach “J.N” flux
---> interest for an “in situ” interest for an “in situ” roadpavement measurement roadpavement measurement systemsystem (to minimize installed flux)
![Page 4: Objective measurements of light trespass and surfaces Marc Gillet Prof. Rombouts (Univ. Brussels) with collabor. Univ. Berlin (prof. Kaase)](https://reader030.fdocuments.net/reader030/viewer/2022032517/56649c9d5503460f9495c762/html5/thumbnails/4.jpg)
SummarySummary
1. Introduction2. Algorithm3. Measurements4. Calculations
![Page 5: Objective measurements of light trespass and surfaces Marc Gillet Prof. Rombouts (Univ. Brussels) with collabor. Univ. Berlin (prof. Kaase)](https://reader030.fdocuments.net/reader030/viewer/2022032517/56649c9d5503460f9495c762/html5/thumbnails/5.jpg)
1. Introduction1. Introduction
• Many authors work with reflection• Assumptions for ”” • Wide variation
= 0.07 = 0.10 = 0.18
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2. Algorithm (I)2. Algorithm (I)
= r / i
• L p = q (, ) . E p
r =(, nature of road).E.dS
= (i.dS).E i
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Algorithm (II) / case of a roadAlgorithm (II) / case of a road
ROAD
Surround
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3. Measurements (I)3. Measurements (I)
X
P
750
P´’
BaffleDetector
Sample
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Measurements (II)Measurements (II)
Porous Asphalt
0
1
2
3
4
5
6
7
8
0 20 40 60 80Gamma Angles
Ref
lect
ance
Asphalt 1
0
2
4
6
8
10
12
0 20 40 60 80
Gamma Angles
Ref
lect
ance
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Measurements (III)Measurements (III)
Concrete
0
5
10
15
20
25
0 20 40 60 80Gamma Angles
Ref
lect
ance
Concrete
0
5
10
15
20
25
0 20 40 60 80Gamma Angles
Ref
lect
ance
![Page 11: Objective measurements of light trespass and surfaces Marc Gillet Prof. Rombouts (Univ. Brussels) with collabor. Univ. Berlin (prof. Kaase)](https://reader030.fdocuments.net/reader030/viewer/2022032517/56649c9d5503460f9495c762/html5/thumbnails/11.jpg)
Measurements (IV)Measurements (IV)
Reflectance
0
5
10
15
0 20 40 60 80
Gamma
refl
(%) Asphalt
Porous asph.
Concrete
![Page 12: Objective measurements of light trespass and surfaces Marc Gillet Prof. Rombouts (Univ. Brussels) with collabor. Univ. Berlin (prof. Kaase)](https://reader030.fdocuments.net/reader030/viewer/2022032517/56649c9d5503460f9495c762/html5/thumbnails/12.jpg)
Measurements (V)Measurements (V) Highly VARIABLE
• Increases with
• Lower for Asphalt than Concrete
• Flatter in the case of Concrete
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4. Conditions of Calculations4. Conditions of Calculations
• Road Width = 7m• Overhang = -1m• Single sided arrangement• H=10m• Spacing optimized to obtain
->L=0.75cd/m²->U0 >40%->Ul > 60% ->TI < 15%
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4. Conditions of Calculations (II)4. Conditions of Calculations (II)
• Dimming to obtain the “J.N”• various Light Distributions• Optimization on
• Asphalt• Porous Asphalt• Concrete
Calculation of t = d + r
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4. Calculations (IV)4. Calculations (IV)103368
16469 8195 7555 9193 9152
0
20000
40000
60000
80000
100000
120000
bo
wl
po
or
refl
ecto
r
flat
gla
ss
curv
edg
lass
d.b
ow
l
refr
acto
r
bowl
poor reflector
flat glass
curved glass
d.bowl
refractor
TOTAL UPWARD FLUX
(Asphalt)
789
276192 171 205 136
0
100200
300400
500600
700800
bo
wl
po
or
refl
ecto
r
flat
gla
ss
cu
rved
gla
ss
d.b
ow
l
refr
acto
r
bowl
poor reflector
flat glass
curved glass
d.bowl
refractor
INSTALLED
LAMP KLM/KM
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4. Calculations (V)4. Calculations (V)
16469
81957555
9193 9152
02000400060008000
10000120001400016000
po
or
refl
ecto
r
flat
gla
ss
curv
edg
lass
d.b
ow
l
refr
acto
r
poor reflector
flat glass
curved glass
d.bowl
refractor
TOTAL UPWARD FLUX
(Asphalt)
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4. Calculations (VI)4. Calculations (VI)
02000400060008000
1000012000140001600018000
poor
refle
ctor
flat
glas
s
curv
edgl
ass
d.bo
wl
refr
acto
r
reflect. Flux
direct flux
REPARTITION OF FLUXES
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4. Calculations (VII)4. Calculations (VII)
ave = reflect./(E.S)
with reflect from calculation tooland E from “lighting design soft.”
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4. Calculations (VIII)4. Calculations (VIII)Asphalt 1
0
2
4
6
8
10
12
0 20 40 60 80
Gamma Angles
Ref
lect
ance
Ref. and C.g
= 7.4%
= 50°
Flat glass
= 7.2%
= 46°
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4. Calculations (IX)4. Calculations (IX)
9729 957510654
13742
0
2000
4000
6000
8000
10000
12000
14000
flat glas curved glass plexi refractor
TOTAL UPWARD FLUX (Porous Asphalt)
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4. Calculations (X)4. Calculations (X)TOTAL UPWARD FLUX (Concrete)
12604 1257613621
15888
0
2000
4000
6000
8000
10000
12000
14000
16000
flat glas curved glass plexi refractor
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6. Near Future 6. Near Future
• Refine analysis for surroundings
• CELMA guidance notes soon