Street Lamp Cleaning UAV / Drones

Under the street lamp needing cleaning, control the UAV to the position where UAV is at the same level of the street lamp, unfold the cleaning arm and move slowly towards the street lamp to make it wrapped in the sponge of cleaning arm (just touch the surface of the street lamp).Through the self-awareness of UAV, rotate the cleaning arm at the right position, and spray leaner internally to clean the surface of the street lamp. After the completion of self-cleaning, the cleaning arm moves away from the street lamp and fly in the air. If there is another lamp needing cleaning, just control the UAV to fly to it.