Method for detecting verticality of high tower based on three-dimensional laser scanning

A technology of three-dimensional laser and detection method, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of difficult control of precision, large data limitations, and difficult implementation of operations, and achieve fast speed, high precision, and point cloud acquisition easy effect

Inactive Publication Date: 2017-11-24
POWERCHINA XIBEI ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of difficult implementation operation, difficult control of precision, time-consumin

Method used

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  • Method for detecting verticality of high tower based on three-dimensional laser scanning
  • Method for detecting verticality of high tower based on three-dimensional laser scanning
  • Method for detecting verticality of high tower based on three-dimensional laser scanning

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Embodiment 1

[0034] This embodiment provides a method for detecting the verticality of a towering tower based on three-dimensional laser scanning, combining figure 1 and figure 2 shown, including the following steps:

[0035] Step 1) Obtain point cloud data: set up a 3D laser scanner to obtain the point cloud data of the 1 / 3 ring section of the vertical projection of the tower;

[0036] Step 2) Build a TIN model: preprocess the point cloud data obtained in step 1) to build a TIN model of the 1 / 3 ring of the tower;

[0037] Step 3) Extract tower section: select two tower horizontal sections from the TIN model obtained in step 2);

[0038] Step 4) Reduction of the center coordinates of the tower tube section: select any 3 points that are not collinear on the two tower tube horizontal contour sections in step 3), and determine the 3 points on each tower tube horizontal contour section A unique circular plane is used to calculate the center coordinates of the horizontal contour sections of...

Embodiment 2

[0042] On the basis of Example 1, specifically, the step 1) meets the following requirements:

[0043] a) The horizontal distance between the erection point of the 3D laser scanner and the tower is not less than 3 / 2 of the height of the tower, and it should be able to completely scan the height of the tower;

[0044] b) Use the compass to determine the first erection orientation, and the initial orientation of the subsequent repeated erection of the scanner should be consistent with the initial orientation;

[0045] c) Every time the scanner is fixed and erected, a centering and leveling device must be used to ensure the scanner is level;

[0046] d) Each scan first performs a fast panoramic rough scan, and then performs a fine scan of the target tower.

Embodiment 3

[0048] In the above two embodiments, the horizontal contour sections of the two towers selected in step 3) should be the upper and lower sections of the tower whose verticality is to be measured. Select the horizontal contour section according to the tower section to be measured, which should be the upper and lower sections of the tower section to be measured.

[0049] If the tower section to be measured is the entire tower, then the two tower horizontal contour sections selected in step 3) are the top section and bottom section of the tower, and the data in the top section and bottom section Calculate the verticality of the entire tower.

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Abstract

The invention belongs to the technical field of building deformation measurement, and specially relates to a method for detecting the verticality of a high tower based on three-dimensional laser scanning. The method comprises the steps: 1), enabling the horizontal distance between a fixed instrument and a tower not to be less than 3/2 of the height of the tower, and obtaining the body point cloud data of a 1/3 circular segment of the vertical projection of the tower; 2), building a 1/3 circular body TIN model, carrying out the fitting of the upper and lower centers of the circular tower, and extracting the section of the tower; 3), calculating the central coordinates of the section of the circular tower, wherein any three non-collinear points on the section can determine a unique circular plane; 4), calculating the longitudinal and lateral inclined components and slope of the tower through the obtained central coordinates of the bottom and top of the circular tower. The method irons out the defects that a conventional verticality detection method for the high tower is difficult in outdoor operation, is difficult in precision control, consumes a large amount of time and manpower, is poor in target data accuracy and is big in data limitation. The method can achieve the detection of the verticality of the high tower quickly at high precision, and has important significance to the detection and monitoring of the similar projects.

Description

technical field [0001] The invention belongs to the technical field of building deformation measurement, and in particular relates to a method for detecting the verticality of a tower tube based on three-dimensional laser scanning. Background technique [0002] Building deformation measurement is the monitoring of horizontal displacement, settlement, inclination, deflection, cracks, etc. of buildings and their foundations. In particular, fan towers, thermal cooling towers, water towers, chimneys, etc. are mostly towering cylindrical buildings, with the characteristics of high height (greater than 60m) and relatively small cross-section. During long-term operation, this kind of high-rise tower is repeatedly subjected to external force loads such as its own gravity, natural wind force, and earthquakes, which may cause the tower to tilt or partially bend, and easily cause the tower to topple or collapse. [0003] Today, new surveying and mapping technologies are becoming more ...

Claims

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Application Information

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IPC IPC(8): G01B11/26G01B11/16
CPCG01B11/16G01B11/26
Inventor 吕宝雄
Owner POWERCHINA XIBEI ENG
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