Study on Optimization of Light Distribution Curve of Tunnel Lamps and Influence of Lamp Layout Parameters

Xiaolong Yan; Yingying Feng

doi:10.3788/LOP202259.2124001

Laser & Optoelectronics Progress, Volume. 59, Issue 21, 2124001(2022)

Study on Optimization of Light Distribution Curve of Tunnel Lamps and Influence of Lamp Layout Parameters

Xiaolong Yan^* and Yingying Feng

Author Affiliations

College of Information Engineering, Fuyang Normal University, Fuyang 236041, Anhui , China

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Abstract Get PDF(in Chinese)

Figures & Tables(22)

Fig. 1. Transverse light distribution diagram of tunnel lamps

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Fig. 2. Longitudinal light distribution diagram for tunnel lamps

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Fig. 3. Tunnel modeling diagram

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Fig. 4. Calculation area by point method

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Fig. 5. Normalized light distribution curve of lamps

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Fig. 6. Pseudo color map of tunnel lighting effect

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Fig. 7. Lighting distribution mode of tunnel lighting. (a) Symmetrical lighting; (b) staggered lighting

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Fig. 8. Comparison diagram of tunnel isoilluminance curve under two lighting modes. (a) Symmetrical lighting; (b) staggered lighting

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Fig. 9. Comparison diagram of tunnel average brightness under two lighting modes. (a) Symmetrical lighting; (b) staggered lighting

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Fig. 10. Comparison of average illumination of tunnel under different installation elevation angles

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Fig. 11. Comparison of average brightness of tunnel under different installation elevation angles

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Fig. 12. Comparison of brightness uniformity of tunnel under different installation elevation angles

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Fig. 13. Comparison of longitudinal brightness uniformity of tunnel under different installation elevation angles

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Fig. 14. Comparison of tunnel brightness uniformity and longitudinal brightness uniformity under different lamp installation spacings

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Fig. 15. Comparison of average brightness of tunnel under different lamp installation spacings

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Table 1. Lighting angle parameters of lamps in all directions
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Table 1. Lighting angle parameters of lamps in all directions
θ₁ /（°） θ₂ /（°） θ /（°） θ₃ /（°）
19.76 34.40 54.16 56.31

Table 2. Evaluation standard of trunk road
View table
Table 2. Evaluation standard of trunk road
E_av /lx L_av /（cd·m^-2） U₀ U_L
≥20 ≥1.5 ≥0.4 ≥0.7

Table 3. Evaluation index of the designed lamps
View table
Table 3. Evaluation index of the designed lamps
E_av /lx L_av /（cd·m^-2） U₀ U_L
94.4 5.39 0.90 0.99

Table 4. Evaluation indexes of tunnel pavement under two lighting modes
View table
Table 4. Evaluation indexes of tunnel pavement under two lighting modes
Lighting mode E_av /lx L_av /（cd·m^-2） U₀ U_L
Symmetrical lighting 94.40 5.39 0.90 0.99
Staggered lighting 89.64 5.14 0.82 0.98

Table 5. Evaluation indexes in the calculation area under different installation elevation angles

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Table 5. Evaluation indexes in the calculation area under different installation elevation angles

α /（°）	E_av /lx	L_av /（cd·m^-2）	U₀	U_L
0	83.5	4.76	0.54	0.98
5	88.7	4.97	0.72	0.98
10	92.8	5.12	0.81	0.98
15	94.4	5.39	0.90	0.99
20	92.8	4.98	0.70	0.99
25	87.8	4.66	0.58	0.98
30	81.1	4.25	0.47	0.97
35	74.2	3.84	0.44	0.96
40	66.8	3.42	0.44	0.98
45	59.9	3.04	0.47	0.97
50	52.8	2.67	0.50	0.95
55	46.0	2.31	0.55	0.95
60	39.2	1.96	0.60	0.95

Table 6. Brightness uniformity and longitudinal brightness uniformity of tunnel under different lamp installation spacings
View table
Table 6. Brightness uniformity and longitudinal brightness uniformity of tunnel under different lamp installation spacings
Lighting installation spacing /m U₀ U_L
3 0.82 0.99
6 0.82 0.98
9 0.82 0.98
12 0.78 0.96
15 0.75 0.89
18 0.78 0.90
21 0.74 0.89
24 0.60 0.76
27 0.48 0.58
30 0.39 0.44

Table 7. Average brightness value of tunnel under different lamp installation spacings
View table
Table 7. Average brightness value of tunnel under different lamp installation spacings
Installation spacing /m Average brightness /（cd·m^-2）
3 15.41
6 7.71
9 5.14

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Xiaolong Yan, Yingying Feng. Study on Optimization of Light Distribution Curve of Tunnel Lamps and Influence of Lamp Layout Parameters[J]. Laser & Optoelectronics Progress, 2022, 59(21): 2124001

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Paper Information

Category: Optics at Surfaces

Received: Sep. 21, 2021

Accepted: Nov. 2, 2021

Published Online: Oct. 31, 2022

The Author Email: Xiaolong Yan (ahkami0111@163.com)

DOI:10.3788/LOP202259.2124001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Lighting angle parameters of lamps in all directions

Table 1. Lighting angle parameters of lamps in all directions

Table 2. Evaluation standard of trunk road

Table 2. Evaluation standard of trunk road

Table 3. Evaluation index of the designed lamps

Table 3. Evaluation index of the designed lamps

Table 4. Evaluation indexes of tunnel pavement under two lighting modes

Table 4. Evaluation indexes of tunnel pavement under two lighting modes

Table 5. Evaluation indexes in the calculation area under different installation elevation angles

Table 5. Evaluation indexes in the calculation area under different installation elevation angles

Table 6. Brightness uniformity and longitudinal brightness uniformity of tunnel under different lamp installation spacings

Table 6. Brightness uniformity and longitudinal brightness uniformity of tunnel under different lamp installation spacings

Table 7. Average brightness value of tunnel under different lamp installation spacings

Table 7. Average brightness value of tunnel under different lamp installation spacings