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| 土体表面三维位移测试的新方法 | |
| 引用本文： | 孙 伟,沈家军,张弘怀,洪宝宁,何小元. 土体表面三维位移测试的新方法[J]. 岩土力学, 2006, 27(Z2): 570-574 |
| 作者姓名： | 孙 伟 沈家军 张弘怀 洪宝宁 何小元 |
| 作者单位： | 1.东南大学 工程力学系，南京 210096；2.河海大学 岩土工程研究所，南京 210098 |
| 摘 要： | 采用双目立体视觉与数字图像相关相结合的新方法，对静载作用下湿喷桩复合地基室内模型的土体表面三维位移进行测试。给出了双目立体视觉系统的标定结果，提出了提取角点坐标的新方法及基于仿射变换的左右摄像机同名点的匹配搜索法，得到了土体表面三维位移随荷载变化的曲线。试验结果证明，将该系统应用于湿喷桩复合地基室内模型的土体表面位移测试是一种有益的尝试，也为土体位移测试提供了新的方法。 |
| 关 键 词： | 双目立体视觉 数字图像相关 湿喷桩复合地基室内模型 角点坐标 仿射变换 土体表面三维位移 |
| 收稿时间： | 2006-10-28 |
New method for 3-D displacement measurement of soil surface |
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| SUN Wei,SHEN Jia-jun,ZHANG Hong-huai,HONG Bao-ning,HE Xiao-yuan. New method for 3-D displacement measurement of soil surface[J]. Rock and Soil Mechanics, 2006, 27(Z2): 570-574 | |
| Authors: | SUN Wei SHEN Jia-jun ZHANG Hong-huai HONG Bao-ning HE Xiao-yuan |
| Affiliation: | 1.Department of Engineering Mechanics, Southeast University, Nanjing 210096, China; 2. Research Institute of Geotechnical Engineering, Hehai University, Nanjing 210098, China |
| Abstract: | Binocular stereo vision system and digital image correlation method are combined to measure3-D displacement of soil surface on wet jet pile composite foundation modal. The calibrated projection matrixes are determined. A novel method for extracting corner coordinates and a searching method for correlating the corresponding points of two cameras based on affine transformation are presented. 3-D displacement-load curves are obtained. The experimental results demonstrate that it is a valuable attempt to measure the surface displacement of soil on wet jet pile composite foundation modal using this system, and provides an efficient tool for the measuring of 3-D displacement of soil surface. |
| Keywords: | binocular stereo vision system,digital image correlation,wet jet pile composite foundation modal,corner coordinates,affine transformation 3-D displacement of soil surface, |
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