Tunnel modeling method and device
A modeling method and tunnel technology, which is applied in the field of rail transit, can solve problems such as difficult section data processing and calculation of tunnel overall modeling, interference of tunnel structural deformation analysis, and impact on tunnel analysis efficiency and accuracy.
Active Publication Date: 2019-09-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
Due to the irregular deformation of the tunnel section caused by external forces and the influence of noise and abnormal points in the point cloud data, it is difficult to perform accurate cross-section data processing and calculation and further overall tunnel modeling by means of circle fitting or ellipse fitting. , which greatly interferes with the deformation analysis of the tunnel structure, seriously affecting the efficiency and accuracy of the tunnel analysis
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[0041] In the prior art, the data processing and rapid modeling technology based on the collected 3D point cloud of the tunnel is still in its infancy. Among them, the data calculation is generally completed by circle fitting or ellipse fitting in the process of section deformation analysis. Due to the irregular deformation of the tunnel section caused by external forces and the influence of noise and abnormal points in the point cloud data, it is difficult to perform accurate cross-section data processing and calculation and further overall tunnel modeling by means of circle fitting or ellipse fitting. , which greatly interferes with the deformation analysis of the tunnel structure, seriously affecting the efficiency and accuracy of the tunnel analysis.
[0042] In the embodiment of the present invention, the tunnel reflection image is generated according to the acquired three-dimensional point cloud data. Segment the tunnel reflection image into a group of single-loop tube s...
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The invention discloses a tunnel modeling method and device, and the method comprises the steps of generating a tunnel reflection image according to the obtained tunnel three-dimensional point cloud data, and building a mapping relation between the tunnel three-dimensional point cloud data and the tunnel reflection image; identifying all vertical boundaries in the tunnel reflection image, and segmenting the tunnel reflection image into a group of single-ring pipe sub-images; identifying the group of single-ring pipe sheet sub-images, and respectively obtaining a pipe sheet block boundary corresponding to each single-ring pipe sheet sub-image; obtaining a point cloud data set corresponding to each segment block in the tunnel three-dimensional point cloud data; and carrying out optimization matching on the point cloud data set corresponding to each segment block and a corresponding theoretical model in a preset segment block theoretical model library, and constructing a tunnel overall model. According to the above scheme, the tunnel modeling efficiency and accuracy can be improved.
Description
technical field [0001] The invention relates to the technical field of rail transit, in particular to a tunnel modeling method and device. Background technique [0002] With the continuous development of the city, in order to reduce the pressure of ground transportation, the subway has become the main component of the public transportation system with high capacity. However, on the one hand, more and more buildings near the subway tunnel lead to the deformation of the tunnel, which may have a serious impact on its safety and stability; The traffic system of the whole city will be endangered. Therefore, the daily detection and maintenance of the entire tunnel system is very important. [0003] When detecting the deformation of subway tunnels, the traditional method is mainly manual detection, which has low accuracy and efficiency, and consumes a lot of manpower, material resources, and financial resources. In contrast, the application of 3D laser scanning technology has gr...
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IPC IPC(8): G06T17/20G06T7/13
CPCG06T17/20G06T7/13G06T2207/10028
Inventor 汪俊易程鲁德宁谢乾
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS