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Three-dimensional laser scanning measurement method and device

A three-dimensional laser and measurement method technology, applied in the field of laser measurement, can solve the problems of reducing the measurement efficiency, undersampling, and spatial resolution of the three-dimensional laser scanner, and achieve the effect of improving the measurement efficiency and the spatial measurement accuracy.

Active Publication Date: 2012-05-09
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Abstract
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Problems solved by technology

However, from figure 1 It can be seen from the figure that when the rock wall in the goaf is very close to the 3D laser scanner, the method of measuring with a fixed step angle will lead to oversampling, which seriously reduces the measurement efficiency of the 3D laser scanner; When the 3D laser scanner is far away, the method of measuring with a fixed step angle will lead to undersampling and low spatial resolution; when the angle between the normal direction of the rock wall in the goaf and the 3D laser scanner is large, use Measuring with a fixed step angle will also reduce the spatial resolution; when the rock wall in the goaf is uneven or there are gaps, a high-resolution scanning method is needed, and the traditional equal step angle method There is no way to do this by taking measurements

Method used

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  • Three-dimensional laser scanning measurement method and device

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Embodiment 1

[0031] In this embodiment, a three-dimensional laser scanner is used to scan the measured object to obtain the three-dimensional spatial shape structure of the measured object. The above-mentioned three-dimensional laser scanner mainly includes: a host, a rotatable measuring head, an axial angle measuring device, a radial angle measuring device, an axial driving device and a radial driving device; wherein, the rotatable measuring head can Driven by the driving device and the radial driving device, it rotates in the axial and radial directions, and measures the distance of the measurement point on the surface of the measured target. The rotation angle of the rotatable measuring head is measured by the axial angle device and radial angle measurement device acquisition.

[0032] A schematic diagram of the implementation principle of a three-dimensional laser scanning measurement method with adaptive resolution provided by this embodiment is as follows: figure 2 As shown, the sp...

Embodiment 2

[0059] This embodiment provides a three-dimensional laser scanning measurement device, the specific structure of which is as follows Figure 4 As shown, it can specifically include:

[0060] The initial measurement point measurement module 41 is used to measure the distance between each measurement point in the adjacent area where the initial measurement point is located and the rotatable measurement head of the three-dimensional laser scanner;

[0061] The angle increment calculation module 42 is used to calculate the rotatable measuring head according to the set algorithm according to the distance between each measuring point obtained by the initial measuring point measuring module and the rotatable measuring head of the three-dimensional laser scanner the next angle increment. The angle increment calculation module 42 calculates the next angle increment θ of the rotatable measuring head through the following calculation formula

[0062] θ = ...

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Abstract

The embodiment of the invention provides a three-dimensional laser scanning measurement method and a three-dimensional laser scanning measurement device. The method mainly comprises the following steps of: measuring the distance between each measurement point in a neighboring region of an initial measurement point and a rotary measurement head of a three-dimensional laser scanner respectively, calculating a next angle increment of the rotary measurement head by a set algorithm according to the distance between the each measurement point and the rotary measurement head of the three-dimensionallaser scanner, obtaining a next measurement point according to the angle increment, and measuring the distance between each measurement point in the neighboring region of the next measurement point and the rotary measurement head of the three-dimensional laser scanner respectively. The method and the device can realize dynamic adjustment of the angle increment of the three-dimensional laser scanner when implementing scanning on the surface of a measured object, further realize equal resolution scanning on the surface of the measurement object, and improve the measurement efficiency and spatial measurement precision of the three-dimensional laser scanner.

Description

technical field [0001] The invention belongs to the field of laser measurement, and in particular relates to a three-dimensional laser scanning measurement method and device. Background technique [0002] A three-dimensional laser scanner is a device that obtains the distance between the three-dimensional laser scanner and each measurement point on the surface of the measured target through a laser ranging sensor, and then obtains the three-dimensional space shape of the measured target. 3D laser scanners can achieve high-precision non-destructive measurement, and have important application value in many fields such as 3D modeling of buildings, digitization of underground structures in mines, and protection of cultural relics. [0003] The measurement accuracy of the 3D laser scanner mainly includes two parts: distance resolution accuracy and spatial resolution accuracy. Among them, the distance resolution accuracy refers to the accuracy with which the 3D laser scanner obta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00G01B11/24
Inventor 张达杨小聪余乐文王利岗陈凯张元生张晓朴
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY