the sun shines into the undergrounds

background:With the improvement of China’s modernization, the subway, as a representative of new urban transportation, is developing rapidly. Underground shopping malls, underground parking lots and other underground activity spaces are also being developed according to the growth of demand. However, due to the lack of direct access to sunlight in the underground space, there are many problems, such as large lighting power consumption, large hidden dangers in power safety and so on. Therefore, the energy-saving transformation of subway lighting system needs to be solved urgently.The COVID-19 has been going on for several years, and the situation is still grim. We need to make preparations for the normalization of wearing masks, health codes and disinfection. As the underground activity space with the largest flow of people in the city, the subway station is very easy to breed bacteria, viruses and other hazards to human health due to the lack of direct sunlight. Therefore, it needs all-round and regular sterilization. The workload is heavy, and the ultraviolet sterilization and disinfection effect is excellent.Site:Tianfu SquareTianfu Square is the political and cultural center and comprehensive transportation hub of Chengdu. It is located in the first section of Renmin South Road, Qingyang District, Chengdu, Sichuan Province, and in the heart of Chengdu.design scheme:A lighting and epidemic prevention system for underground space is proposed, which combines the sunlight into the underground for lighting, power generation and energy storage, and cooperates with the ultraviolet disinfection. It is similar to an umbrella street lamp that collects sunlight to illuminate the underground space during the day and uses stored electric energy to illuminate the ground at night.At the same time, people can stop and rest in the umbrella space, which greatly increases the comfort and interest of the cityThe facility is an umbrella street lamp with a radius of 3M. Inspired by the convex lens, the umbrella top is made into a convex lens composed of acrylic balls, which can focus sunlight at one point. The sunlight is transmitted to the underground space through optical cables and directly used for the lighting of the subway station. This process greatly reduces the energy consumption of ordinary solar street lamps in converting light energy into electric energy and then into light energy, and greatly improves the energy utilization rate, At the same time, the remaining energy is stored for lighting at night and in rainy daysprocess and analysisBefore the light energy in the optical fiber reaches the underground lampshade, it will pass through the ultraviolet detector, separate the ultraviolet from the sunlight through the spectral separation device, and then absorb the ultraviolet. With only one button, it can be disinfection and sterilization through the ultraviolet emission disinfection device.The computer chip assists the motor to control the storage and transportation of sunlight. At the same time, with the help of the computer chip, the small motor will automatically adjust the position of the optical fiber collection end to optimize the receiving and transmission of sunlight when it moves in the sky.