Measuring method for geometrical features of tunnel appendages

A technology of geometric features and measurement methods, which is applied to measuring devices, instruments, and optical devices, can solve problems such as low efficiency, whether the state is intrusive, and high labor costs, and achieve high data collection efficiency, high resolution, and improved operation. efficiency effect

CN109798830BActive Publication Date: 2020-09-08SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-09-08

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Abstract

The invention provides a method for measuring geometric characteristics of tunnel appendages. The method includes the following steps: S1, obtaining laser point cloud data by using a mobile laser scanning device; S2, generating a tunnel plane image according to the laser point cloud data and establishing coordinate formulas corresponding to points on the tunnel plane image; S3, measuring a plane coordinate of the target point on the tunnel plane image; S4, obtaining row and column number information of the target point according to the coordinate formula; S5, obtaining a three-dimensional coordinate of the target point according to the laser point cloud data of the target point; and S6, repeating the step S3-S5 to obtain three-dimensional coordinates of multiple required target points andcalculating the distance between any two of the target points according to the three-dimensional coordinates. The method for measuring the geometric characteristics of the tunnel appendages of the invention can quickly measure the position, size, distance and other characteristics of the tunnel appendages, and has the advantages of high measurement efficiency and labor cost saving.
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Description

technical field

[0001] The invention relates to the field of tunnel measurement, in particular to a method for measuring geometric characteristics of tunnel appendages. Background technique

[0002] In order to ensure the safe operation of subway trains and monitor the safety of the tunnel, a large number of auxiliary facilities and monitoring equipment are installed inside the tunnel ring. Due to the special environment of the tunnel, while these appendages protect the safe operation of the subway, whether their own state violates the boundary is also a hidden danger. In the traditional method, it is necessary to regularly check the safety of all appendages in the tunnel through manual inspection. Or use an instrument to measure the change of its position, the efficiency is extremely low, and the labor cost is high. Contents of the invention

[0003] Aiming at the deficiencies in the above-mentioned prior art, the present invention provides a method for measuring the geo...

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Embodiment Construction

[0027] According to the attached figure 1 , 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.

[0028] see figure 1 , a method for measuring geometric characteristics of tunnel appendages according to an embodiment of the present invention, comprising the steps of:

[0029] S1: Use a mobile laser scanning device to obtain laser point cloud data of a target tunnel. The laser point cloud data includes feature data sets of multiple scanning points; feature data sets include row and column number information (C, R) corresponding to the current scanning point, Three-dimensional coordinates (X, Y, Z) and laser intensity value (I).

[0030] S2: According to the row and column number information (C n , R n ) and the laser intensity value (I) projection generate a high-resolution tunnel plane image, and establish a coordinate formula corresponding to eac...