Mobile tunnel laser detection data processing method

A technology of laser detection and data processing, applied in measurement devices, optical devices, instruments, etc., can solve problems such as errors, low efficiency, and long time spent

CN110411361AActive Publication Date: 2019-11-05CAPITAL NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-11-05

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Abstract

The invention relates to a mobile tunnel laser detection data processing method. The method comprises steps of acquiring original, actual tunnel section point cloud data; correcting tunnel section mileage data based on accumulated errors; performing tunnel point deformation analysis, convergent diameter analysis, multi-phase data comparison and analysis and comparison and analysis of multiple measurement manners according to point cloud on the inner wall of the tunnel, so as to acquire tunnel deformation situation; determining whether the tunnel section point cloud is within a standard profileenclosed by limiting points by using a horizontal ray method, so as to determine whether invasion points exist; converting section point cloud data into a designed absolute coordinate system, so as to restore a design line type of the tunnel; and performing texture mapping by using an orthogonal projection image of the inner wall of the tunnel so as to acquire a 3D model of the tunnel. In the method, tunnel deformation analysis, mileage correction, boundary detection, recovery of the design line type of the tunnel and 3D modelling of the tunnel can be performed according to the original, actual section, and data is processed rapidly.
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Description

technical field

[0001] The invention relates to the technical field of tunnel detection data processing, in particular, the invention relates to a method for processing laser detection data of a moving tunnel. Background technique

[0002] As the number and scale of tunnels in our country increase year by year, the rapid monitoring and detection of tunnel structure status becomes particularly important. Mobile laser scanning measurement technology is a technology that is more concerned and researched in the industry at present, but in the past, mobile laser detection systems mostly installed scanners on track detection trolleys, and integrated odometers, displacement sensors, inertial navigation systems, GPS, etc. A variety of sensors are designed to obtain tunnel point cloud data in an absolute coordinate system.

[0003] Tunnel detection generally characterizes its deformation law by analyzing its cross-section, but the current technology mostly extracts the tunnel cross-...

Examples

Embodiment Construction

[0124] The present invention will be further described in detail in conjunction with the accompanying drawings and embodiments, so that those skilled in the art can implement it with reference to the description.

[0125] It should be understood that the specific embodiments described below are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe various operations (or steps) as sequential processing, many of the operations may be performed in parallel, concurrently, or simultaneously. Additionally, the order of operations may be rearranged so that operations may b...