文章摘要
戴云彤.连续视场的多相机数字图像相关测量方法[J].安徽建筑大学学报,2023,31(2):19-25
连续视场的多相机数字图像相关测量方法
Multi-camera Digital Image Correlation Method with Continuous View Field
  
DOI:
中文关键词: 数字图像相关  多相机  连续视场  变形测量
英文关键词: digital image correlation  multi-camera  continuous view field  deformation measurement
基金项目:安徽省自然科学基金项目(2008085QA23);安徽建筑大学博士启动基金项目(2018QD50)
作者单位
戴云彤 安徽建筑大学 土木工程学院安徽 合肥 230601 
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中文摘要:
      为拓展三维数字图像相关方法的应用范围并提高测量精度,将数字图像相关方法和多相机同步采集系统相结合,形成连续视场的多相机三维数字图像相关测量方法,在满足大长细比、大曲率和复杂全表面连续变形测量需求的同时,提高应变测量精度。多个相机同步拍摄物体表面的不同区域,相邻局部区域之间满足视场重叠范围要求,通过多相机标定将数据点映射至同一全局坐标系下,实现连续视场的多相机数字图像相关测量。利用双相机系统和多相机系统同时观测板的平移实验和梁的三点弯曲实验,结果表明,连续视场的多相机数字图像相关测量方法充分利用相机空间分辨率,一定程度上提高了三维变形测量精度。
英文摘要:
      To promote the application and the measurement accuracy of the three-dimensional digital image correlation method,thedigital image correlation method and the multi-camera synchronous acquisition system are combined to form a multi-camera threedimensional digital image correlation method with continuous view field. The full-surface continuous deformation measurementrequirements of objects with large slenderness,large curvature and complex surface are fulfilled,meanwhile the strain measurementaccuracy is improved. Different local areas of the measured surface are simultaneously captured by multiple cameras,in which a certainview field overlap between adjacent areas is satisfied. Through multi-camera calibration,multiple cameras are unified into a globalcoordinate system to achieve multi-camera digital image correlation measurement with continuous view field. The stereo-camera systemand multi-camera system are utilized to measure the translation experiment of plate and bending experiment of beam. Experimentalresults indicate that the multi-camera digital image correlation method with continuous view field makes full use of cameras' spatialresolution and improves the deformation measurement accuracy to some extent.
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