传统摄影测量的经过长期发展已经形成较为完善技术框架和理论基础,但是难以突破观测范围及观测物距与测量分辨率及精度之间固有矛盾的限制,在解决大型工程和结构的变形监测过程中多点同步、实时动态、精密测量等问题时面临挑战.针对桥梁等大型结构,本文提出了一种新的摄像测量系统构型方式,能够解决测量范围、测量物距与相机物理分辨率之间的内在冲突,通过桥梁监测实验,证明了相机网络技术能够实现大型工程结构变形的精密动态观测.针对风电叶片监测问题,本文通过全局观测站和局部随动站的相机组网测量,能够同时观测风电叶片的全局运动和局部变形,获得精确的结果.相机组网极大拓展了传统摄像测量的能力和应用前景.
Traditional photo grammetry has developed over a long time to form a relatively complete technical framework and theoretical basis.However,it is challenging to overcome the inherent contradiction between the observation range and the distance to the observed object and the resolution and accuracy of the measurements,particularly when dealing with multi-point synchronous,real-time dynamic,precise measurement in large-scale engineering and structural deformation monitoring.This paper proposes a new configuration of the camera measurement system for bridges and other large structures,which can solve the intrinsic conflict between measurement range,object distance,and physical resolution of the camera.Large bridge monitoring experiments prove that camera network technology can achieve accurate dynamic observation of large-scale engineering structural deformation,achieving a scale span of 6-7 orders of magnitude between measurement range and accuracy.In terms of wind turbine blade monitoring,this paper introduces a camera network measurement method involving a global observation station and local tracking station,which can simultaneously observe the global motion and local deformation of wind turbine blades without stopping their operation,thus obtaining precise measurement results.Camera network measurement greatly expands the capabilities and application prospects of traditional camera measurements.