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A method for automatically identifying a middle partition wall of a large-diameter shield tunnel based on point cloud data

A technology of point cloud data and shield tunneling, which is applied in three-dimensional object recognition, character and pattern recognition, complex mathematical operations, etc., to achieve the effect of reducing manual operation time

Active Publication Date: 2019-02-19
SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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  • Claims
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Problems solved by technology

[0004] Therefore, in order to reduce manual operation time and make full use of the advantages of 3D laser scanning technology, there is currently a lack of and a need for a method for automatically identifying partition walls in large-diameter shield tunnels based on point cloud data

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  • A method for automatically identifying a middle partition wall of a large-diameter shield tunnel based on point cloud data
  • A method for automatically identifying a middle partition wall of a large-diameter shield tunnel based on point cloud data
  • A method for automatically identifying a middle partition wall of a large-diameter shield tunnel based on point cloud data

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Embodiment Construction

[0040] According to the attached Figure 1-3 , give a preferred embodiment of the present invention, and give a detailed description, so that the functions and characteristics of the present invention can be better understood.

[0041] see Figure 1 ~ Figure 3 , a method for automatically identifying a partition wall in a large-diameter shield tunnel based on point cloud data in an embodiment of the present invention, comprising the steps of:

[0042] S1: Obtain the point cloud data of each section of each channel of the large-diameter shield tunnel 1 through a three-dimensional laser scanning device. The point cloud data includes the three-dimensional coordinates (x, y, z) of each scanning point in the section, where x represents The coordinate value of the X-axis of the current section, y indicates the coordinate value of the Y-axis of the current section, z indicates the coordinate value of the Z-axis of the current section; the X-axis is set along the horizontal direction...

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Abstract

The invention provides a method for automatically identifying a middle partition wall of a large-diameter shield tunnel based on point cloud data, comprising the following steps: S1, acquiring the point cloud data of each section of each passage of a large-diameter shield tunnel by a three-dimensional laser scanning device; 2, calculating that included angle theta between each scan point and the vertical direction of the corresponding section; 3, extracting a first point cloud set and a second point cloud set of different kinds from that point cloud data according to the included angle theta;The type comprises a tunnel segment end point cloud set and a middle partition wall end point cloud set; S4: identifying and determining a type of the first point cloud and the second point cloud. Theinvention discloses a method for automatically identifying the middle partition wall of a large-diameter shield tunnel based on point cloud data, which can automatically identify the middle partitionwall of the large-diameter shield tunnel according to the point cloud data, and can reduce manual operation time.

Description

technical field [0001] The invention relates to the field of point cloud automatic identification, in particular to a method for automatically identifying a partition wall in a large-diameter shield tunnel based on point cloud data. Background technique [0002] In recent years, the speed of development and utilization of underground space in China and the speed of infrastructure construction have been accelerating, and shield tunneling technology has also developed rapidly. Especially in the field of cross-river traffic tunnels, large-diameter shield tunnels are popular. Considering safety issues such as ventilation and escape during tunnel operation, it is necessary to set up a partition wall in the tunnel so that the uplink and downlink of the tunnel run in two separate spaces. [0003] Three-dimensional laser scanning technology is a new type of measurement technology developed in recent years, which has the advantages of high measurement efficiency, rich measurement inf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06F17/16
CPCG06F17/16G06V20/64
Inventor 刘蝶王令文高志强郭春生严桃
Owner SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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