Design of Counter Beam Tunnel Lights for CIE 88 : 2004 Regulation in Threshold Zone

Ming-Jui Chen; Hien-Thanh Le; Lanh-Thanh Le; Wei-Hsiung Tseng; Wei-Yang Lee; Si-Yuan Chen; Sheng-Yen Chen; Hsing-Yuan Liao; Yung-Cheng Li; Hsiao-Yi Lee

doi:10.1155/2020/6145638

International Journal of Optics (Jan 2020)

Design of Counter Beam Tunnel Lights for CIE 88 : 2004 Regulation in Threshold Zone

Ming-Jui Chen,
Hien-Thanh Le,
Lanh-Thanh Le,
Wei-Hsiung Tseng,
Wei-Yang Lee,
Si-Yuan Chen,
Sheng-Yen Chen,
Hsing-Yuan Liao,
Yung-Cheng Li,
Hsiao-Yi Lee

Affiliations

Ming-Jui Chen: Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan
Hien-Thanh Le: Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan
Lanh-Thanh Le: Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan
Wei-Hsiung Tseng: Department of Aviation & Communication Electronics, Air Force Institute of Technology, Kaohsiung City 820, Taiwan
Wei-Yang Lee: Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan
Si-Yuan Chen: Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan
Sheng-Yen Chen: Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan
Hsing-Yuan Liao: Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan
Yung-Cheng Li: Department of Materials Science and Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
Hsiao-Yi Lee: Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan

DOI: https://doi.org/10.1155/2020/6145638
Journal volume & issue: Vol. 2020

Abstract

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To enhance driving safety, a counter beam light is proposed to meet CIE (International Commission on Illumination) specifications for tunnel lighting. The proposed new counter beam light (CBL) acts as a qualified counter beam light to help tunnel road lighting meet the CIE 88 : 2004 regulation standard in the threshold zone in both simulation and in practice. Through appropriate arrangements of the counter beam light and conventional fluorescent lights on the tunnel ceiling, we demonstrate that road tunnel lighting meeting CIE 88 : 2004 standards can be accomplished. Based on LiteStar four-dimensional simulation, the source file created through the measurement of the proposed CBL prototype achieved an average road surface brightness of 121 cd/m2, which is greater than the minimum regulation level of 105 cd/m2, a brightness uniformity of 0.88 (minimum regulation level of 0.4), longitudinal brightness uniformity of 0.98 (minimum regulation level of 0.6), a glare factor of 4.41% (maximum level of 15%), and a contrast revealing coefficient of 1.08, which is above the 0.6 minimum level in the threshold zone.

Published in International Journal of Optics

ISSN: 1687-9384 (Print); 1687-9392 (Online)
Publisher: Hindawi Limited
Country of publisher: United Kingdom
LCC subjects: Science: Physics: Optics. Light
Website: https://onlinelibrary.wiley.com/journal/3839

About the journal