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Foundation pit deformation early warning method, system and device based on photogrammetry
The invention provides a foundation pit deformation early warning method, system and device based on photogrammetry, and relates to the technical field of foundation pit deformation monitoring, and the method mainly comprises the steps: uniformly arranging control points on a measured foundation pit; acquiring three-dimensional coordinates of the control point; based on a photogrammetric scheme, calibrating a photogrammetric baseline length and a camera position; acquiring an image of the measured foundation pit through a camera; on the basis of the three-dimensional coordinates of the control points, point cloud data and image exterior orientation elements of the control points are obtained, the point cloud data and the image exterior orientation elements are integrated with the measured foundation pit image to obtain a three-dimensional sparse point cloud model, and a three-dimensional dense point cloud model is obtained through densification processing; rendering and reconstructing to obtain a three-dimensional model of the measured foundation pit; calculating the three-dimensional coordinates of the monitoring points; based on a preset monitoring period, calculating the variable quantity of the three-dimensional coordinates of each monitoring point; and when the deformation of a certain monitoring point in a certain direction exceeds a preset threshold value, early warning is triggered. The scheme is simple in structure and low in cost, and can monitor the deformation condition of the measured foundation pit in real time and perform early warning.
本发明提供了一种基于摄影测量的基坑变形预警方法、系统及装置，涉及基坑变形监测技术领域，方法主要包括：在被测基坑上均匀布设控制点；获取所述控制点的三维坐标；基于摄影测量方案，标定摄影基线长度及相机位置；通过相机获取被测基坑影像；基于控制点的三维坐标，得到控制点的点云数据及影像外方位元素，与被测基坑影像进行整合，得到三维稀疏点云模型，致密化处理得到三维致密点云模型；渲染重建得到被测基坑的三维立体模型；计算监测点三维坐标；基于预设监测周期，计算各监测点三维坐标的变化量；当某个监测点的某个方向变形量超过预设阈值时，触发预警。本方案结构简洁、成本低，可以实时监测被测基坑的变形情况并预警。
Foundation pit deformation early warning method, system and device based on photogrammetry
The invention provides a foundation pit deformation early warning method, system and device based on photogrammetry, and relates to the technical field of foundation pit deformation monitoring, and the method mainly comprises the steps: uniformly arranging control points on a measured foundation pit; acquiring three-dimensional coordinates of the control point; based on a photogrammetric scheme, calibrating a photogrammetric baseline length and a camera position; acquiring an image of the measured foundation pit through a camera; on the basis of the three-dimensional coordinates of the control points, point cloud data and image exterior orientation elements of the control points are obtained, the point cloud data and the image exterior orientation elements are integrated with the measured foundation pit image to obtain a three-dimensional sparse point cloud model, and a three-dimensional dense point cloud model is obtained through densification processing; rendering and reconstructing to obtain a three-dimensional model of the measured foundation pit; calculating the three-dimensional coordinates of the monitoring points; based on a preset monitoring period, calculating the variable quantity of the three-dimensional coordinates of each monitoring point; and when the deformation of a certain monitoring point in a certain direction exceeds a preset threshold value, early warning is triggered. The scheme is simple in structure and low in cost, and can monitor the deformation condition of the measured foundation pit in real time and perform early warning.
本发明提供了一种基于摄影测量的基坑变形预警方法、系统及装置，涉及基坑变形监测技术领域，方法主要包括：在被测基坑上均匀布设控制点；获取所述控制点的三维坐标；基于摄影测量方案，标定摄影基线长度及相机位置；通过相机获取被测基坑影像；基于控制点的三维坐标，得到控制点的点云数据及影像外方位元素，与被测基坑影像进行整合，得到三维稀疏点云模型，致密化处理得到三维致密点云模型；渲染重建得到被测基坑的三维立体模型；计算监测点三维坐标；基于预设监测周期，计算各监测点三维坐标的变化量；当某个监测点的某个方向变形量超过预设阈值时，触发预警。本方案结构简洁、成本低，可以实时监测被测基坑的变形情况并预警。
Foundation pit deformation early warning method, system and device based on photogrammetry
一种基于摄影测量的基坑变形预警方法、系统及装置
WANG LIFENG (author) / GAO YANG (author) / LI SHENGCHAO (author) / LIU LEI (author) / WANG WEIXING (author)
2024-10-11
Patent
Electronic Resource
Chinese
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