From the torch to LED lamps, history and future exploration of tunnel lighting

The tunnel as a human traffic mode, is composed of a section of a semi enclosed structure composed of underground space. Because of the special structure of the tunnel, sunlight cannot direct, the day also need lighting. The lighting system is one of the most important modern facilities in tunnel engineering, and tunnel lighting once put into use, lighting system in a long term working state. The origin of tunnel can be traced back to the spring and Autumn period, the Qin was the world's first man-made "Baoxie road tunnel". Historical records: "Cloud Road Trinidad, Tung Shuhan, that the world is afraid of qin." At the time of the tunnel lighting is the torch, very simple and very convenient. In modern time, with the development of industrialization, the tunnel traffic gradually increased, tunnel lighting is developing gradually. In the middle of nineteenth Century, tunnel lighting kerosene, gas lamps, until the end of nineteenth Century, and gradually applied to the tunnel lighting lamp. Baoxie Road site simple tunnel lighting era in the last century at the beginning of 90s, China's little tunnel tunnel lighting facilities, not to mention, the highway tunnel is mostly no lighting or just hanging a few street lights, lighting quality is very low, the tunnel lighting to meet the lighting needs only stay in simple. At present, with the continuous innovation of technology, development of tunnel lighting industry has made great progress. Even in the era of simple lighting, tunnel lighting has experienced the development process from the incandescent lamp, fluorescent lamp, high-pressure mercury lamp, low pressure sodium lamp, high pressure sodium lamp. Continue to break through the tunnel lighting source in the luminous efficiency, luminous flux, color and the color of life, etc., to create a better environment for tunnel lighting. Since intelligent tunnel lighting era in twenty-first Century, the development of LED lighting technology is becoming more and more strong, LED lighting gradually occupy most of the market of tunnel lighting. LED light source with high luminous efficiency, color characteristics coefficient is high, long service life, high efficiency, low power consumption, and the LED lamp with dimming function is perfect, can be changed at any time according to the tunnel lighting level of day and night and the volume of traffic and other factors, through the integration of WiFi and ZigBee network technology, LED lighting in the era of intelligent lighting for tunnel lighting. In 2007, LED domestic road tunnel lighting market began to form. The first 5 years, many manufacturers ignored because of heat issues of LED lighting, LED Road, had caused tunnel lighting project failure rate as high as 90% or more, misleading LED lighting technology "is not mature enough to be the development trend of" wait-and-see opinion. But at the same time, Shanghai twice by his own unique heat, light distribution technology, the development of 148 LED Road, tunnel lighting project was completed, 250 thousand sets of high power LED lamps provide all stable operation. Among them, China's first LED tunnel lighting project - Jiangxi King Eagle high tunnel LED lighting project, was named the national energy-saving emission reduction demonstration project of Ministry of communications; also used Shanghai Sansi LED lighting project - Fujian Nan Hui highway tunnel, by the development and Reform Commission, Ministry of finance, the Ministry of transport as a national demonstration of highway tunnel LED lighting engineering. Jiangxi King Eagle high tunnel in southern Fujian Hui highway tunnel tunnel lighting intelligent control system in different sections according to the lighting requirements, the tunnel lighting illumination distribution reasonable, but also supports a variety of intelligent dimming methods, such as: the lights as the tunnel lighting, depending on the brightness near the entrance and exit of the lamp should be closer to normal outdoor light, from both ends to the middle gradually decline, in order to reduce the "black hole, white hole effect, improve the traffic safety; while according to the time, season, weather and automatically adjust the brightness to the appropriate position of the function, the lighting system built in different scene modes, to realize the intelligent management, to ensure traffic safety. In this regard, Shanghai before the construction of the Shaanxi Zhaxiao tunnel intelligent lighting project, was named the national demonstration project. Shaanxi Zhaxiao tunnel in addition, large scale tunnel engineering project LED application products in Shanghai think twice and the intelligent control system is applied to Yunnan highway tunnel, Chongqing Zhangjiashan tunnel and Hunan Liangshuijing tunnel, Shanghai road tunnel in Dalian, Beijing Chengde, Yunnan Pu Xuan highway tunnel, G85 Chongqing and Kunming high-speed line Ma Chao the Hong Kong Zhuhai Macao Bridge Tunnel and deep tunnel completed or under construction. In recent years, with the city to speed up the process, people pay more and more attention to road traffic safety and comfort, the tunnel lighting intelligent control technology have become increasingly demanding; and with the continuous development of new technology, tunnel lighting intelligent control technology will be "more energy-efficient, more comprehensive and more comfortable" direction.