Non-contact displacement test based on optimal circle fitting method and development of visual software
CHEN Su1, 2, CHEN Guo-xing1, 2, HAN Xiao-jian1, 2, QI Cheng-zhi3, DU Xiu-li4
1. Institute of Geotechnical Engineering, Nanjing University of Technology, Nanjing 210009, China; 2. Civil Engineering & Earthquake Disaster Prevention Center of Jiangsu Province, Nanjing 210009, China; 3. School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 4. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100022, China
Abstract：A non-contact displacement test method is proposed based on the principle of optimal circle fitting, and the relevant object-oriented visualization software is developed. The proposed method is verified by the shaking table tests. The verification shows that the independently-developed non-contact displacement test method has good performance in circlic detections and displacement tests. The precision achieves sub pixel accuracy. The horizontal displacement of the shaking table measured by the non-contact displacement test method is compared with that by the strain type displacement meter. The comparison shows that the similarity degree of displacement distribution patterns between the above two methods is 0.98. The packaged technique efficiently solves the problem of displacement tests under inconvenient conditions to set up sensors and test range restricted by the traditional displacement test methods, and it may avoid the interference to the measured objects.
陈苏, 陈国兴, 韩晓健, 戚承志, 杜修力. 基于最优圆拟合原理的非接触性动态位移测试方法及可视化软件的研发[J]. 岩土工程学报, 2013, 35(zk2): 369-374.
CHEN Su, CHEN Guo-xing, HAN Xiao-jian, QI Cheng-zhi, DU Xiu-li. Non-contact displacement test based on optimal circle fitting method and development of visual software. Chinese J. Geot. Eng., 2013, 35(zk2): 369-374.
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