History Of Tunnel Lighting :from Simple Lighting To Smart Lighting

- Jul 21, 2019-

The tunnel is a semi-enclosed space, and natural light can't be illuminated. In order to ensure the continuity of driving and the safety of the driver's life, artificial lighting is required throughout the day, and tunnel lighting is an indispensable part of tunnel construction.


In ancient times, torches were used as the most commonly used lighting tools in tunnel lighting, and the lighting facilities were very simple and inconvenient. Since then, with the advent of China's industrialized society, the development of tunnel lighting has made great progress. In recent years, with the rapid development of the Internet of Things technology, the tunnel lighting field has undergone earth-shaking changes. While ensuring normal lighting, it can also save power, and can also control and manage the lighting facilities in the tunnel.

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Modern excavated ancient tunnel


Contemporary generation tunnel lighting - the era of simple lighting


The development of domestic tunnel lighting system started late. Although the current development of highway tunnels in China is very rapid, it still cannot match the mature technology and concept of foreign countries. The gap is not only manifested in technology and experience, but also in basic engineering construction.


In the early 1990s, most of the road tunnels in China had no lighting or only a few street lights for pedestrian lighting. Only a few tunnels were equipped with lighting facilities, and their technical standards were still very low. In the 21st century, China has made remarkable achievements in the field of tunnel construction. The opening of a large number of long and large tunnels represented by the Qinling Zhongnanshan Highway Tunnel indicates that the design, construction, supervision, maintenance and operation of China's highways have reached the level. A new height. Road tunnel lighting technology has also evolved with the improvement of tunnel construction technology and operational management.


Modern tunnel lighting - the era of intelligent lighting


I. Early traditional tunnel intelligent lighting control


Nowadays, the development of intelligent lighting control system has been decades old. The traditional intelligent control system is the beginning of intelligent control of tunnel lighting, including the automatic dimming control mode of the switch control box for lighting, which breaks the manual control of traditional lighting control. The main pattern greatly improves the efficiency and power usage. The way of working is to intelligently control the voltage, current and frequency through the lighting power supply control system installed in the lighting control system distribution circuit.


Secondly, the loop control of the power distribution installed in the lighting control system is used to realize the regular intelligent control. The dimming control of the traditional lighting intelligent control system is mainly divided into discontinuous dimming and continuous dimming, according to the principle of intelligent regulation. Intelligent regulation of discharge light source and intelligent regulation of heat radiation source.


However, the early intelligent control method of the traditional intelligent control method is relatively complicated, the control range is small, and the so-called intelligent control is actually semi-intelligent control, which needs further improvement in automation and safety comfort.


Second, the tunnel intelligent lighting control under the Internet of Things era


The fastest-growing development in the 21st century is the Internet of Things technology. The country is also vigorously advocating and developing the Internet of Things industry, and has invested heavily in it. The tunnel lights have also caught up with this fashion. Based on this, the owner of the tunnel and the design, operation, maintenance and other units have put forward the need for intelligent control of lighting.


The wireless lighting control system is an intelligent control scheme that has received much attention in recent years. Its advantage is that it does not need to lay control lines; the communication rate can reach 250Kbps; the installation position of the area controller can be arbitrarily specified, and the required number is small. The advanced lighting control method satisfies the requirements of tunnel lighting under the visual conditions, and can also save energy reasonably.


At present, the tunnel intelligent lighting design is mainly automatic control mode lighting and time-segment lighting control mode. The commonality of these two lighting modes is cost saving. The design basis is based on the peak hours of traffic flow, which can meet the tunnel lighting. The basic needs, the automation and simplicity of operation, and the ease of centralized management have won unanimous praise in the industry.


Intelligent tunnel lighting - the era of ZigBee technology


However, a tunnel lighting project in Yan'an, which was completed by Shunzhou not long ago, took advantage of the advantages of wireless control and handled the shortcomings of the traditional tunnel intelligent control system. It is reported that this project uses the advanced ZigBee technology, using the traditional single-light controller, can achieve single-lamp control, built-in single-light controller lighting source, you can execute the relevant commands through the commands issued by the service center.


And the light source can be tested for voltage, current, power factor, lighting rate, energy consumption, etc., and uploaded to the service center to achieve intelligent control and energy saving. At the same time, it is also possible to report the luminaires by reporting data from time to time and save operating costs.


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A tunnel lighting project in Yan'an completed by Shunzhou


It is worth mentioning that on sunny sunny days, the tunnel system can adjust the brightness of the light according to the data returned by the light sensor to adapt to the lighting needs of sunny days. At the same time, when the weather turns negative, the light changes. By changing the brightness to meet lighting needs. The system can also be built with different scene modes for intelligent management.


In addition, the tunnel of the system is installed, and the lighting can adjust the brightness according to the actual changes in the driving, so as to provide the driver with the best view and ensure the safety of driving.


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Shunzhou intelligent wireless control system


Conclusion: With the rapid development of China's economy, road tunnels are bound to increase, and modern tunnel lighting systems mostly have shortcomings such as energy waste and ineffective lighting. Therefore, in order to reduce the operating cost of the tunnel and improve the working efficiency of the lighting system, the demand for the control technology of the tunnel lighting will be higher and higher, and the tunnel lighting intelligent control technology will also be "more advanced, more efficient, and more The direction of safety is developing.