Deformation Characteristics of Hand Movement During Grasping
10.16156/j.1004-7220.2021.03.20
- VernacularTitle:抓取过程中的手部运动变形特征
- Author:
Qiyu ZHU
1
;
Zixiang TONG
1
;
Fang YUAN
1
;
Kang WEI
1
;
Xinxing SHAO
1
;
Xiaoyuan HE
1
Author Information
1. Department of Engineering Mechanics, School of Civil Engineering, Southeast University
- Publication Type:Journal Article
- Keywords:
multi-camera digital image correlation (DIC);
three-dimensional (3D) deformation measurement;
grasping process;
hand movement
- From:
Journal of Medical Biomechanics
2021;36(3):E423-E439
- CountryChina
- Language:Chinese
-
Abstract:
Objective Based on the multi-camera digital image correlation (DIC) method, the dynamic deformation characteristics of human hand during grasping were studied. Methods A continuous four-camera DIC system was established to measure surface strain of the skin on the back of the hand during grasping process, and then through the connection between skin, joints, bones and muscles, the regular pattern of muscle deformation could be known indirectly. Results Four grasping postures (medium cylinder, lateral pinch, index finger extension, power sphere) were measured. It was found that the increases of strain magnitude were different at different positions on back surface of the hand under different grasping postures, and the maximum principal strains were between 0.1 and 0.3. The movement characteristics for each muscle group of the hand under different grasping postures were obtained through analysis. Conclusions This method has the characteristics of non-contact, full field, intuitive results, which provides a new way for in vivo measurement of dynamic deformation during grasping.
