| With the rapid development of road construction in China,the mileage of road tunnels is increasing.Due to the strong brightness difference between the tunnel and the external environment,it is easy to cause visual and psychological obstacles to the driver.In order to ensure the safety of the driver’s life,most of the lighting devices in the tunnel are running around the clock at this stage,ignoring the dynamic changes in the environment,such as lighting,traffic flow,and so on,resulting in a huge waste of electrical energy.In response to the modern needs of tunnel lighting safety,intelligence,energy conservation and environmental protection,this paper adopts power line carrier communication technology,combined with the lighting dimming algorithm based on vehicle location,and designs a tunnel lighting energy-saving control system.The specific research content is as follows:(1)This paper designs the overall scheme of the tunnel lighting energy-saving control system based on the power line carrier technology.Through the introduction of tunnel lighting related technologies,the functional requirements of the tunnel lighting system are analyzed,and the overall system architecture is determined.(2)The tunnel lighting control system is designed.The hardware part mainly includes the micro-processing control module,switch alarm module,information acquisition module,LED dimming module and communication module.The micro-processing controls module transmits the dimming command through the power line carrier module according to the information collected by the collection module,and then controls the dimming circuit to adjust the brightness of the LED lamp.The software part adopts Keil u Vision5 to develop the software,and realizes the information interaction between the modules according to the functional requirements of the system.(3)The energy-saving control algorithm of tunnel lighting is studied based on vehicle location.The real-time brightness,traffic flow,vehicle speed and vehicle location information obtained by the acquisition module are used as input signals,and the lighting brightness of each section of the tunnel is output through the dimming algorithm.For road sections where there is no vehicle,the LED brightness is controlled at the lowest safety requirement value;for road sections where the vehicle is driving,the LED brightness is adjusted to the calculated value,so that the tunnel lights follow the vehicle as a moving bright band,thus achieving energy-saving control of the tunnel lighting system.Compared with the positioning algorithms using SSA,BA,GWO,WOA,the algorithm in this paper has better positioning accuracy.(4)Tunnel lighting control system function is tested and host computer interface is designed.In the experimental environment,the communication module,alarm module,dimming control system and sound source positioning system were tested to verify the stable operation ability of the system.At the same time,PyQt was used to design a data display interface for visual system information interaction,enriching the system function. |
