桥梁施工线形无人机测量方法与参数优化

Parametrical Study and Optimization Using Unmanned Aerial Vehicle Measurement in Bridge Construction Alignment

桥梁悬臂施工控制过程需进行大量线形测量工作,传统测量方法耗时耗力、难以通测,无人机摄影测量具有高机动性、低成本、不依赖人工等优势,将其应用于桥梁线形测量,可解决自适应施工控制过程中线形通测的难题。考虑桥梁施工测量的特点,提出桥梁线形无人机测量的技术框架和主要控制参数,研究适合施工现场的标记点布置方式与航线规划。通过试验研究无人机飞行高度、投射线夹角、视角数量、照片数量等参数对测量精度的影响,在此基础上,总结出桥梁悬臂施工线形无人机测量方案优化方法,可保证各测点的坐标测量精度达到毫米级。

Alignment measurement is necessary during bridge construction.However,traditional measurement methods consume a lot of time and labors,especially for long-distance measurement.Unmanned aerial vehicle(UAV)photogrammetry has the advantages of high maneuverability,low cost,and independence on labor.The application of UAV to bridge alignment measurement can improve efficiency and promote construction control automation.In this paper,the framework and control parameters using UAV were studied as well as the layout of markers and route planning suitable for construction site.An experimental study was conducted to investigate the influence of parameters on the measurement accuracy including flying height,angle of bundle,photo overlap and quantity,based on which,the optimization method using UAV in bridge alignment survey was proposed.With the optimized measurement scheme,the coordinate measurement accuracy of each point can reach the millimeter level.