LED隧道照明自动调光系统的设计

Design of automatic dimming system for tunnel LED lighting

为降低隧道照明消耗的大量电力,充分挖掘和利用LED(发光二极管)光源在隧道照明中的优势,以大功率白光LED照明光源为基础,提出了一套隧道照明实现亮度自动调节的解决方案。该方案采用基于RS485总线的闭环回路通信架构,能够自动生成灯节点地址编码,实现每一灯节点的独立256级灰(亮)度控制;采用光敏元件检测洞外亮度作为调节隧道内灯具输出功率的依据;系统采用GPRS无线通信方法,实现调光控制数据、故障报警的远程传输和监控。经过实验室模型验证和实际隧道的测试,说明本设计方案是可行的,同时也大幅提高了隧道照明安全、舒适的效果,节省了能源,有推广价值。

In order to reduce the energy consumption of tunnel lighting, and exploit and utilize LED （ light emitting diode） lamp in the field of tunnel lighting, a new automatic dimming scheme was proposed in this paper.Closed loop communication structure was adopted based on RS485, and every LED lamp node could produce its own exclusive ad-dress encoder automatically.Every LED lamp node was capable of carrying 256 gray level.Photosensitive element was introduced to detect the tunnel outside brightness, which was as the calculating dependence to control LED lamp power.The system used GPRS wireless communication method to transfer the data of dimmable lighting and fault a-larming.This design is proven to be feasible after model test and examination in tunnel.It promotes the safety and comfort of lighting circumstance for tunnel traffic, and is also energy saving and merited to be extended.