Study on Application of Close-Range Photogrammetric 3D Reconstruction in Structural Deformation Measurement 

Tengjiao JIANG 

School of Civil Engineering, Chongqing Jiaotong University, Chongqing, 400074, CHINA 

Abstract: For large civil engineering structures, many touch sensors are often required to be arranged in the key position of the structure. This will lead to not only the sensor data transmission is difficult, but also the fi-nite measurement points is difficult to fully reflect the actual state of the structure. Based on laboratory stu-dies of close-range photogrammetric three-dimensional reconstruction, we further put it applied to actual civil engineering structure. The three-dimensional surface deformation of the road is simulated by placing objects with different thickness, and the improved image acquisition method is used to collect the image of the road. Three-dimensional reconstruction models of two working conditions are established in the software. Based on the point data extracted from the surface of the three dimensional reconstruction model, the Geomagic Quali-fy software was used to compare three-dimensional fitting surfaces of the two working conditions. Finally, we get the deformation chromatogram of each condition. The deformation of the surface of the road is directly and accurately reflected in the deformation chromatogram, and the size is close to the thickness of the object. It would lay the foundation for further research and application of close-range photogrammetric three-dimensional reconstruction. 

Keywords: Close-range photogrammetry; Three-dimensional reconstruction; Structure deformation measurement