Abstract
Because of the particularity of the environment in the tunnel, the rational tunnel illumination system should be developed, so as to optimize the tunnel environment. Considering the high cost of traditional tunnel illumination system with high-pressure sodium (HPS) lamps as well as the effect of a single light source on tunnel entrance, the energy-saving illumination system with HPS lamps and LEDs combined illumination in road tunnel, which could make full use of these two kinds of lamps, was proposed. The wireless intelligent control system based on HPS lamps and LEDs combined illumination and microcontrol unit (MCU) Si1000 wireless communication technology was designed. And the remote monitoring, wireless communication, and PWM dimming module of this system were designed emphatically. Intensity detector and vehicle flow detector can be configured in wireless intelligent control system, which gather the information to the master control unit, and then the information is sent to the monitoring center through the Ethernet. The control strategies are got by the monitoring center according to the calculated results, and the control unit wirelessly sends parameters to lamps, which adjust the luminance of each segment of the tunnel and realize the wireless intelligent control of combined illumination in road tunnel.
Highlights
As we know, the road tunnel, with closed top and sides, is a special kind of tubular structure
Conventional high-pressure sodium (HPS) lamps have a long working life, high luminous efficacy, high color temperature, and more comfortable environment [4]; the actual service life will shorten sharply when the luminous output changes unsteadily as the voltage fluctuates; in addition, the conventional operation of highway tunnel is restricted by the large electric energy loss, frequent replacement of lamps, light pollution, and thermal radiation produced by the intense light
The wireless intelligent control system for HPS lamps and LEDs combined illumination in road tunnel is proposed to solve the problem of high illumination costs and high energy consumption
Summary
The road tunnel, with closed top and sides, is a special kind of tubular structure. The tunnel illumination must consider the human eye’s dark adaptation and light adjusting so as to ensure the safety of driving traffic into the tunnel. According to the highway tunnel CIE adaptation curve, the intelligent control mode can dynamically adjust the luminance to be safe, comfortable, efficient, and economical. The lighting adjusted according to the requirement (with the standard requirement) can come true [10] For this purpose, the wireless intelligent control system based on HPS lamps and LEDs combined illumination and microcontrol unit (MCU) Si1000 wireless communication technology is proposed
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