In order to solve the problem of veiling glare when driving through tunnels and saving electric ener gy, a LED intelligent illumination control system for tunnels is designed based on the short start-up and direct current driving characteristic of LED. A detailed introduction about control strategy and working principle of the system are given. The system has three operation modes as auto mode, manual mode and emergency mode to meet different demands of operator. The system was verified in the manual mode. The results show that the sys tem can not only tune the illumination of LED continuously in real time accurately but also broaden the range of brightness from 0 to 100% .%为了解决驾驶员在穿越隧道时的眩光效应和节约隧道照明电能,利用LED灯启动时间短和恒流驱动的优点,设计了大功率LED隧道照明控制系统.对系统的控制策略和工作原理进行了详细介绍.系统设有自动、手动和应急等3种工作模式,满足了不同应用的需要.在手动模式下,对系统进行了验证,结果表明该控制系统不仅可以实时精确地连续调光,而且调光范围可达到0～100％.
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