Application And Research Of Avoidance Technology About Crop Protection UAV

UAV is widely used in all areas of life with the increasing maturity of UAV technology, such as military, police, industry and civil fields etc.The UAV began to replace the manual operations and have a great potential in the market because of the high efficiency, and low cost. This article focuses on avoidance technology on application of the Plant Protection UAV. Open source flight control Is considered as the core control device,and it is developed secondly. Obstacle avoidance module,was added to achieve a simple evadible effect.Firstly,This article introduces the four-rotor unmanned flight platform and its overall structure.This paper compares and analyzes several mainstream open-source flight control systems and briefly introduces the working principle of four-rotor unmanned flight platform.The hardware of the obstacle avoidance system is designed. The flight control system adopts the open source flight control APM. The obstacle avoidance control system adopts the open source module Arduino mega 2560. The obstacle avoidance system adopts the ultrasonic ranging module US-016.Besides,on the basis of the hardware design, the control strategy of obstacle avoidance system is put forward and the software is designed.Ultrasonic distance measurement module real-time detect the distance of obstacle when the distance less than the safe distance,and obstacle avoidance control system opens the interruption.Obstacle avoidance system outputs the corresponding PWM signal to the flight control system so that the flight control system controls the corresponding motor rotation to achieve obstacle avoidance.In the aspect of software design, the ultrasonic ranging program is written and the code of obstacle avoidance is compiled by using the open source software Arduino IDE.The communication between the obstacle avoidance system and the obstacle avoidance control system is realized.Finally,we carry on the hardware debugging and software debugging.After the joint flight test,it proves that the four-rotor unmanned aerial vehicle flight stability,and the obstacle avoidance effect is good.The results achieved the intended purpose.