Laser reflection sheet achieving method suitable for positioning and deformation analysis in channel

Abstract

The invention relates to the field of subway channel monitoring, in particular to a laser reflection sheet achieving method suitable for positioning and deformation analysis in a channel. The method comprises steps of material analysis; channel deformation analysis reflection sheet processing; point cloud data processing; reflection sheet coding scanning; and experiment verification, wherein the reflection sheet coding scanning comprises a binary system hash code and the binary system hash code comprises forward-direction compiling of the binary system hash code and inverse-direction recognition of the binary system hash code. The beneficial effects are that by using a dot matrix to scan the binary system hash code, through total point cloud data reflection intensity, effective reflectionpoint recognition is scanned and screened, so point cloud plane fitting and plane projection are effectively reflected; and through point cloud coordinate conversion, certain processing is performed on the point cloud data, and through a specific coding rule, transcoding is performed on codes included in the point cloud information, so information like the city where a settlement observation pointis located, the channel number and the point number is obtained, and automatic recognition and reverse-direction designing of channel deformation reflection sheets are achieved.

Description

technical field [0001] The invention relates to the field of subway tunnel monitoring, in particular to a method for realizing a laser reflection sheet suitable for positioning and deformation analysis in a tunnel. Background technique [0002] Since the middle of the 20th century, the process of urbanization in the world has gradually increased, the population of cities in the world has continued to rise, and the economy has developed rapidly. Accelerated urbanization has also brought about a surge in population and a substantial increase in the number of vehicles. The limitation of urban roads has brought about a series of problems such as population oversaturation, traffic congestion, and frequent accidents. Three-dimensional transportation has become the first choice for countries to solve the above-mentioned series of problems under the current situation. The traffic pattern of big cities has been transformed into a new traffic pattern where underground railways are t...

AI Technical Summary

Problems solved by technology

Segment staggering will affect the clearance of the tunnel, bring hidden dangers of waterproofing, and may also cause cracking and damage to the segment structure

[0010] (2) Leaking water

[0012] (3) Segment cracks

[0014] (4) Deterioration of lining material

These two types of convergence have similar but different processes, but are equally destructive and dangerous

[0018] (6) Settlement and uneven settlement

However, in the actual measurement of tunnel settlement monitoring, there are difficulties such as the small space, the inability to use large monitoring equipment, and the dark observation environment.

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