数字图像相关方法中的应变测量平滑算法  

Smoothing Algorithm for Strain Measurement in Digital Image Correlation Method

作　　者：秦飞[1] 魏建友[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院,北京100022

出　　处：《北京工业大学学报》2008年第8期815-819,共5页Journal of Beijing University of Technology

基　　金：国家自然科学基金(10572010);北京市教育委员会科技发展资助项目(KM200610005013);北京市先进制造技术重点实验室开放课题资助项目(102KB00732).

摘　　要：为了降低数字图像相关方法测得的位移场不协调导致的应变误差,采用有限元法中的分片光滑概念和最小二乘法拟合出连续位移场,对位移场求导得到应变场.实验结果表明,光滑后的位移和应变误差得到了明显改善.In order to reduce the error in strain which is caused by the digtial image correlation method, an approach is proposed in which a continuous displacement field is constructed firstly to fit the discrete measure points by the technique used in the finite element method and the least square method, then the strain is calculated from the continuous displacement field. The results indicate that error in displacement and strain can be significantly reduced by the proposed approach.

关 键 词：数字图像 应变测量 平滑算法 

分 类 号：TN247[电子电信—物理电子学]