Tunnel overbreak or underbreak detection method and device, electronic equipment and storage medium

By preprocessing, rotating and correcting the tunnel point cloud, and calculating using the polar coordinate method, the accuracy and real-time issues in tunnel over-excavation and under-excavation detection were solved, achieving efficient tunnel over-excavation and under-excavation detection.

CN115482211BActive Publication Date: 2026-02-06CHINA UNIV OF GEOSCIENCES (WUHAN)
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Patent Information

Application Number
CN202211109731.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-09-13
Publication Date
2026-02-06
Estimated Expiration
2042-09-13

AI Technical Summary

Technical Problem

Existing technologies struggle to achieve high-precision, real-time detection results in tunnel over- or under-excavation detection, especially under conditions of point cloud attitude, point cloud deficiencies, tunnel interference, and unknown design parameters.

Method used

By acquiring the original 3D point cloud of the tunnel, preprocessing is performed, ground plane is removed, the central axis is extracted and rotated to the correct position, the tunnel section is cut to fit the ideal contour, and irrelevant point cloud is removed. Finally, the over-excavation and under-excavation values ​​are calculated using the polar coordinate method.

Benefits of technology

It enables high-precision, real-time detection of tunnel over-excavation and under-excavation in complex environments, simplifies the operation process, and improves the accuracy and speed of detection.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a tunnel overbreak and underbreak detection method and device, and electronic equipment, comprising: obtaining an original three-dimensional point cloud; preprocessing the original three-dimensional point cloud to obtain a processed three-dimensional point cloud; removing the ground plane from the processed three-dimensional point cloud to obtain a target three-dimensional point cloud; extracting a tunnel center axis and converting the target three-dimensional point cloud to a normal state based on relevant parameters; intercepting the three-dimensional point cloud after conversion to obtain a tunnel section, fitting an ideal tunnel contour curve using the section, and obtaining ideal design tunnel excavation surface information according to the ideal contour curve; removing irrelevant point clouds to obtain a measured tunnel three-dimensional point cloud; and calculating overbreak and underbreak for each point based on the ideal design tunnel excavation surface information and the measured tunnel three-dimensional point cloud. In the case of unknown tunnel point cloud posture, point cloud loss, in-hole interference distribution, and self-design parameters, the user can input the point cloud like using a black box to directly obtain an overbreak and underbreak result with high precision and good real-time performance.
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Citation Information

Patent Citations

  • A numerical calculation method for tunnel over-excavation and under-excavation based on laser point clouds

    CN108871268B

  • A tunnel under-excavation detection method based on image three-dimensional reconstruction and a grid curved surface

    CN109598714A

  • Tunnel back-break detection method based on laser-point cloud

    CN106401643A

  • Tunnel overbreak-underbreak measurement method

    CN109470205A