基于LED光通信的移动电子导览系统研究

Research on Mobile Electronic Guide System Based on Lighting LED Optical Communication

利用LED照明和通信的双重功能,研究了一种基于照明LED室外移动光通信的电子导览系统。分析了LED照明驱动和通信调制编码、室外光信道特性、移动电子导览系统原理,讨论LED脉冲调制与照明闪烁的关系,建立嵌入式环境下的可视化电子导览地图,以图、文、声方式提供移动轨迹导向服务,实现设定区域的自助电子导览的功能。结果表明,在保证室外LED正常照明的同时,可利用光照辐射区域实现景点位置信息传输,并完成对应景点信息的显示和播报,可靠实现了室外光接收目标移动路径的可视化导览,在短距离无线光通信应用中具有极大优势。

LEDs are not only used as lighting devices, but also as transmitters for communication systems. In this paper, the electronic guide system based on outdoor lighting LED mobile optical communication is designed. The lighting LED driver, modulation code, the channel characteristics of outdoor lighting LED and the trajectory recognition of light receiving navigator and voice broadcast are analyzed in theory. The relationship among pulse modulation LED, optical transmission and light flashing is discussed, and the visualizing electronic guide map is established in this embedded environment. The optical receiving system provides mobile track-oriented services for tours by picture, text and sound, and makes self-service electronic guide features be realized at the set area. Experimental results show that the system can make normal scenic lighting, get the position information transmission by using light radiation region attractions, and display and broadcast the corresponding information of the attractions simultaneously. The system can reliably realize the visual navigation of the moving path of optical receiver target. It has good utility and spread profit and shows a great advantage in the short-range wireless optical communication.