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- 2017
一种基于三维激光扫描的滑坡变形固定桩点监测方法
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Abstract:
目前，在滑坡监测方面，三维激光扫描普通监测方法的精度无法达到仪器精度的级别.为提高三维扫描监测方法的精度，提出了一种基于固定桩点的新型监测方法.以室内试验和金坪子滑坡Ⅱ区前缘为研究对象，在“面式监测”区域布置目标靶体，在固定桩点上不同时间序列下进行扫描，采用迭代临近点算法（ICP，Iterative Closest Point）配准每期扫描数据和重心法对目标靶体点云进行分析.研究结果显示：采用该方法后三维扫描仪位置移动引起的误差减小了，验证了固定桩点方法的可行性.固定桩点方法不仅提高了监测精度，而且仅依靠三维激光扫描仪即可进行滑坡监测，提高了现场监测效率，有很好的应用前景.
At present, in the aspect of landslide monitoring, the accuracy of the ordinarily used method of 3D laser scanning is unable to reach the 'instrument accuracy level'. In order to improve the accuracy of the 3D scanning monitoring method, a new method based on fixed point is presented in this paper. In an indoor test and a field study of the front edge of Jinpingzi Ⅱ Landslide, we set the scanners at the fixed sites on every sequential scanning, The iterative closest point (ICP) algorithm was applied in the registration of scanning datasets, and the gravity method was used to analyze the 3D point cloud of the targets. Research results showed that the error caused by the changes of 3D scanner position was reduced, and the feasibility of the fixed point method was verified. Not only does the application of the fixed point method improve the monitoring accuracy, it also can carry on landslide monitoring, relying on a 3D laser scanner only. This method can improve the efficiency of field monitoring and is expected to be useful for potential application
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