北京信息科技大学学报（自然科学版）2026，Vol.41Issue(1)：21-29,9.DOI:10.16508/j.cnki.11-5866/n.2026.01.003
面向包壳管应变测量的多相机3D-DIC标定方法
A multi-camera 3D-DIC calibration method for cladding tubes strain measurement
摘要
Abstract
In practical applications of multi-camera three-dimensional digital image correlation(3D-DIC)systems for strain measurement of nuclear fuel cladding tubes,the multi-camera calibration process suffers from accumulated errors increase caused by coordinate systems transformation and insufficient global optimization capability.To address these issues,a multi-camera global calibration method based on a spatial calibration target was proposed.First,an approach was developed to provide initial values of the exterior orientation parameters for each camera at every pose of the calibration target,ensuring the correct convergence of space resection.Subsequently,a multi-camera multi-pose bundle adjustment(BA)method was introduced to ensure the global optimality of multi-comera calibration accuracy.Experimental results demonstrate that the proposed method improves calibration accuracy by 55.1％compared with the direct linear transformation(DLT)method,and reduces the standard deviation of the maximum displacement error by 16.3％.In addition,the proposed method eliminates the need for manual labeling of target points,enabling automation of the calibration process and significantly improving calibration efficiency.关键词
多相机/全局标定/三维数字图像相关/光束平差法/摄影测量/应变测量Key words
multi-camera/global calibration/three-dimensional digital image correlation(3D-DIC)/bundle adjustment/photogrammetry/strain measurement分类
机械制造引用本文复制引用
王健,燕必希,孙鹏,王君,庄炜..面向包壳管应变测量的多相机3D-DIC标定方法[J].北京信息科技大学学报（自然科学版）,2026,41(1):21-29,9.基金项目
国家重点研发计划青年科学家项目(2023YFB3905200) （2023YFB3905200）
