Design of Self-Rotating Tunnel Sunlight Reflection Lighting System

A self-rotating solar reflection lighting system for tunnel lighting is proposed. Based on the principle of integrating the optical center of the lighting system and the outgoing system, the optical characteristics of the system are analyzed and a high- lighting reflection lighting system is designed that is conducive to the overall package. The analysis shows that when the system is tracking sunlight in all directions, the optical center remains unchanged. By setting the direction of sunlight projection, the installation positions in the system can be adjusted to realize full coverage of the tunnel entrance for sunlight lighting, which demonstrates the feasibility of the system for strengthening lighting at the tunnel entrance. Experimental tests show that the maximum utilization rate of sunlight by the system is 60%, and the lighting distance is 120 m long, which indicates a technology with the highest light energy utilization at the same transmission distance as that in direct sunlight lighting. The research and application of this technology can promote low- carbon, energy conservation, and environmental protection technology for highway tunnel lighting that demand high light energy, as well as promote the " carbon peak, carbon neutral" and sustainable development of road traffic.