The invention discloses a
plant-protecting unmanned aerial vehicle based on a BDS and an INS. The unmanned aerial vehicle comprises an unmanned aerial vehicle body, a
flight controller, an onboard controller and a
power unit, wherein both the
flight controller and the onboard controller are installed on the unmanned aerial vehicle body, the
flight controller comprises a BDS
receiver, an IMU and apower module, the BDS
receiver, the IMU and the
power module transmits information with the onboard controller in real time, the onboard controller receives BDS data, difference calculation is conducted on a measured unmanned aerial vehicle space position and a ground
base station to make the unmanned aerial vehicle accurately move according to a flight path, the IMU measures an actual motion trail to obtain flight parameters and adjust a flight attitude of the unmanned aerial vehicle through a power device. The unmanned aerial vehicle also comprises operating path planning
software, a homeward voyage
processing module and a
laser range finder. In addition, the invention also discloses a method for automatic and fine operation and
obstacle avoidance of the
plant-protecting unmanned aerialvehicle based on the BDS and the INS. The
plant-protecting unmanned aerial vehicle has the advantages that the flight path is accurately controlled by utilizing a Beidou
navigation system and an inertial navigation device, can perform fine operation and utilize a built-in
obstacle avoidance algorithm to prevent obstacle collision.