摘要
数字近景摄影测量是通过在近距离范围内对物体进行拍摄,利用拍摄获得的数字图像,精确测定物体在三维空间中的位置、形状、大小乃至运动的方法。主要阐述摄影测量法的原理及检测方法。采用现场照相、图像校正和描绘方法,获得水口水电站机组发电机层楼板裂缝分布情况;运用基于数码照相技术的裂缝测量程序对裂缝的特征进行检测。检测结果可用来分析裂缝产生的原因,进而采取合理的监测和加固措施,以确保建筑物运行安全。
Digital close-range photogrammetry is a method that shoots an objective in a close range.Using the digital images shoot by this photography method,we can detect the position,shape,size and even motion of the objective in 3-D space.We mainly introduce the principle and detection method.We use in-situ photograph,image correction and delineation to obtain the crack distribution of a powerhouse′s floor slab in a hydropower station.The characteristics of cracks are detected by crack surveying program based on digital photography technology.The detection results can be used to analyze the cause of cracks,therefore,we can take reasonable monitoring and reinforcement measures to ensure the structural safety.
出处
《人民长江》
北大核心
2010年第12期74-76,83,共4页
Yangtze River
