基于COFDM技术与MQTT协议的多旋翼无人机信号中继传输技术研究

Research on Signal Relay Transmission Technology of Multi-Rotor UAV Based on COFDM Technology and MQTT Protocol

我国目前架空输电线路困难之处在于其地处地形复杂地区,因地形等因素阻隔时常引起信号失联,在开展巡查任务时使用多旋翼无人机对于克服这一困难有很大帮助。项目采用COFDM技术的图传设备,将飞机端的高清视频流传送至地面端,该技术具备相对较强的穿透能力和绕射能力。在多模态信号一体化中继传输系统的多机联合巡检技术基础上,结合使用MQTT协议的多模态信号一体化中继传输系统,输电线路机巡作业能够“一控多机”、多机联合进行,实际困难可能迎刃而解。

At present,the difficulty of overhead transmission line is that it is located in complex terrain area,and the obstruction of the terrain and other factors often cause signal loss.Using multi-rotor UAV for patrol mission is of great help in overcoming this problem.This project adopts COFDM technology image transmission equipment to stream the high-definition(HD)video from the aircraft to the ground.This technology has relatively stronger penetration ability and diffraction ability.On the basis of the joint inspection technology of multi-modal signal integrated relay transmission system,and combined with the multi-modal signal integrated relay transmission system,with MQTT protocol utilized,the machine patrol operation on transmission line can be carried out in“one control for multiple machines”,and thus the practical difficulties.