Multi-channel ultrasonic obstacle avoidance system of unmanned multi-rotor aircraft

The utility model provides an unmanned multi-rotor aircraft multipath ultrasonic wave obstacle avoidance system, relates to the unmanned aerial vehicle technology field, and comprises an unmanned aerial vehicle body and a mounting plate, positions of the bottom of the mounting plate close to four corners are provided with first fixing bolts in a matching manner, the bottom of the mounting plate is fixedly connected with a plurality of dampers, and the dampers are fixedly connected with the mounting plate. A plurality of damping springs are fixedly connected to the bottom of the mounting plate in an arrayed mode, a buffer plate is fixedly connected between the bottoms of the dampers, and second fixing bolts are connected to the positions, close to the edges of the two sides, of the bottom of the buffer plate in a penetrating mode. According to the utility model, the rotating cover is driven to rotate by starting the first driving motor, the ultrasonic sensing device is driven to rotate in the horizontal direct