Research on Intelligent Control of Tunnel Lighting System Based on LED

The LED is used for the tunnel lighting. And a tunnel lighting system is presented based on 485 bus. While a variant illumination curve is constructed through inference rules of expert system according to the out illumination of the tunnel, car flow in traffic and car speed. And the tunnel illumination is controlled by the given illumination curve. Under the control of the method, the illumination in tunnel made the bright and dark adaptation process more natural and safeguarded the driving in tunnel. Also the variant curve based on the real illumination of the out of a tunnel, car flow and car speed, meets the real driving demand. Finally, a feedforward and feedback control strategy based on the relationship between light flux and brightness in tunnel is presented. As well as the power energy of tunnel lighting system is saved.