CAJ | 학술논문

针对使用图像相关法测量物体发生的较大刚体旋转或变形容易失效的问题,提出了一种连续大变形的图像匹配方法.该方法首先利用相邻状态变形的连续性对种子点进行匹配,然后利用同一状态相邻点的变形连续性,通过种子点为其他点提供初值,并最终完成对所有点的匹配,从而在无需人工交互的情况下实现对大变形过程的高效测量.刚体旋转实验以及单向拉伸实验表明,对于40°的刚体旋转位移场以及高达113％的变形,测量结果良好,证明了本文方法的有效性.
침대사용도상상관법측량물체발생적교대강체선전혹변형용역실효적문제,제출료일충련속대변형적도상필배방법.해방법수선이용상린상태변형적련속성대충자점진행필배,연후이용동일상태상린점적변형련속성,통과충자점위기타점제공초치,병최종완성대소유점적필배,종이재무수인공교호적정황하실현대대변형과정적고효측량.강체선전실험이급단향랍신실험표명,대우40°적강체선전위이장이급고체113％적변형,측량결과량호,증명료본문방법적유효성.
To solve the problem of a large deformation measurement by using the Digital Image Correlation(DIC)method,a DIC method based on seed points is presented.After dividing subsets in the reference image,one point is chosen as the seed point and is matched firstly.According to the deformation continuity of adjacent stages of the image,an improved integer pixel search method is proposed to guarantee that the seed point can be matched successfully even in a large deformation situation.Once the seed point is matched,it can be used to calculate the initial correlation parameters of its four neighbor points according to the deformation continuity of neighbor points in one stage.The above progress repeats until all the points are matched.A rigid rotation experiment and a tensile test are carried out to verify the proposed method.Measurement results for 40° rotation and large deformation up to 113％ confirm the validity of the method.