A point cloud accuracy calibration device and method for a terrestrial three-dimensional laser scanner

Abstract

The invention discloses a point cloud accuracy checking device and method for a ground three-dimensional laser scanner, comprising: a mobile carrier, a rotating part is arranged on the moving carrier, and the rotating parts are respectively connected to lifters for carrying the laser scanner. part and the telescopic part of the scanner used to carry the target; the scanning angle of the adjustment laser scanner is adjustable to check the influence of the scanning horizontal tilt angle on the accuracy of the point cloud; the distance between the direction of the target and the incident direction of the laser scanner The angle between them can be adjusted to check the influence of scanning vertical inclination on point cloud accuracy. The beneficial effect of the present invention is that the accuracy and reliability of the ground three-dimensional laser scanner are realized in practical engineering practice, and the accuracy and reliability of the precision calibration are improved.

Description

technical field [0001] The invention relates to the technical field of laser scanner point cloud precision detection, in particular to a point cloud precision calibration device and method for a terrestrial three-dimensional laser scanner. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Three-dimensional laser scanning technology is known as "another technological revolution in the field of surveying and mapping since GPS technology". Three-dimensional laser scanning technology breaks through the traditional single-point measurement method, and can quickly extract massive three-dimensional coordinate data and texture data on the surface of objects. With its advantages of non-contact, rapidity and initiative, it is widely used in engineering practice and production. . However, the scanner will inevitably produce errors when acquiring data...

AI Technical Summary

Problems solved by technology

However, the scanner will inevitably produce errors when acquiring data. With the rapid development of terrestrial 3D laser scanners, more and more attention has been paid to the accuracy of point clouds.

[0004] The inventor found in the research that: in engineering practice, the terrestrial 3D laser scanner may be used for a long time, wear, vibration or other reasons may lead to a decrease in measurement accuracy or even a measurement error, which may cause engineering accidents in serious cases. Therefore, the 3D laser scanner The evaluation and verification of the measurement accuracy of the laser scanning system is crucial to the control of the quality of point cloud data and engineering results; in different engineering fields or in the face of different surveying and mapping projects and surveying Differences in the environment or detection targets cause different degrees of detection errors. Therefore, different projects have different requirements for point cloud accuracy and allowable error thresholds. Specific detection solutions need to be formulated for different projects.

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