基于数字图像相关性分析的局部应变测量  

Based on digital image correlation analysis of local strain measurement

作　　者：王世玉[1] 席加豪[1] 宋伟志[1] 

机构地区：[1]长安大学汽车学院,陕西西安710064

出　　处：《汽车实用技术》2013年第6期64-67,共4页Automobile Applied Technology

摘　　要：本文在MATLAB平台下,对利用数字图像相关性分析原理进行局部应变测量的方法进行了研究,尝试以图像中互异特征像素相对位移近似估计局部应变,获得一种更接近工程实际应用的简便,非接触应变测量方法。对简支梁进行加载试验,通过相机获取加载前后简支梁数字图像,利用本文方法计算简支梁局部应变,并与理论计算进行对比,进行了误差分析,验证了其结果的准确性。In the MATLAB environment,the use of digital image correlation method for local strain measurement method was studied。It＇s a more convenient to the practical engineering application,as a non-contact strain measurement method.The beam loading tests were carried out,using the camera to obtain the digital images of beam before and after loaded,using the digital image correlation method to gain the local strain of the simply supported beam,and then the results are compared with theoretical calculation. Regarding the error,its accuracy was verified.

关 键 词：数字图像处理 应变 特征像素 相关性分析 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]