Application of Structural Deformation Monitoring Based on Close-Range Photogrammetry Technology

The problem of structural deformation monitoring has always been a research hotspot in engineering architecture. Research on is the main way to solve risk construction. Based using close-range photogrammetry technology monitor deformation, combining with image recognition collect and process data, conditions direct linear transformation collinear equation calculate based extracted coordinates measuring point, finally, according point deflection value bridge structure, study carried out. Experiment: first, five sets data are used calibrate equipment measurement accuracy analyzed, then piers coordinates, lasso, under different load relevant error through calculation methods analyze manifested article. final results show that X-axis coordinate range measured points auxiliary spatial system 25∼40, Y-axis 8∼36, Z-axis 10∼35. cables distributed fourth quadrant system. values all less than 0.1 mm, indicating good effect calibration points, generated when action each cable 10 N greater 20 N. In methods, obtained by total station method reduced about 0.04∼0.07 m compared actual value; increased 0.02∼0.04 other 0.04∼0.06 value.