Research On Route Planning Of UAV Bridge Inspection In Actual Meteorological Environment

Bridge maintenance and inspection at home and abroad play an important role in advancing the transportation industry.Traditional bridge inspection methods are timeconsuming,labor-intensive and low in accuracy,and there are inspection safety hazards.Currently,with the rapid progress of UAV application technology,UAV bridge inspection has been recognized and widely used by domestic and foreign industries,but in the application process often ignore the impact of actual meteorological conditions,resulting in the failure of the inspection task or even a blow-up accident,this paper from the perspective of wind speed,wind angle and temperature changes,through numerical simulation and intelligent algorithms to optimize the path of UAV bridge inspection,in order to ensure This paper provides a practical guide to ensure the smooth implementation of the bridge inspection task,ensure the safety of UAV flight,and even provide some reference for the development of industry standards for UAV bridge inspection.In order to carry out the UAV bridge inspection trajectory optimization research for the actual meteorological environment,first of all,the UAV performance parameters were combined with constraint analysis to gain an in-depth understanding of various influencing factors,including wind direction and speed,temperature changes,etc.At the same time,a physical model was constructed based on the size of large-span bridges in Chongqing,focusing on the pier structure.Then,with the help of wind speed and temperature information provided by Chongqing Meteorological Bureau in the area where the bridge is located,the wake vortices generated by flowing through the piers under different wind conditions are numerically simulated,and the influence range of the wake vortices is analyzed and determined.Finally,considering the influence range of the wake vortex under the actual meteorological conditions and the UAV’s own constraints,the UAV bridge inspection trajectory is determined with the help of genetic algorithm to avoid obstacles and the danger domain affected by the wake vortex,and the optimal flight detection path is given.The research results show that the square pier structure is more dangerous compared with the round pier structure when using UAV for bridge inspection.Under different wind conditions,the higher the wind speed,the higher the possibility of collision and blow-up of the UAV;while the change of temperature does not have a large range of influence on the generated wake vortex,and the UAV is less threatened.The optimal path for UAV bridge inspection is more sensitive to meteorological conditions,especially wind speed factors.Therefore,it is critical to accurately identify and consider these factors when developing flight plans for UAVs to conduct bridge inspections in order to improve the efficiency and effectiveness of bridge inspections.