A terrestrial laser scanner calibration device

By introducing a fixed portal frame and guide rail slide structure into the ground laser scanner calibration device, and combining it with a laser interferometer to eliminate errors, the problem of single spatial dimension caused by two-dimensional planar calibration in the prior art is solved, and the accuracy and flexibility of three-dimensional spatial calibration are realized.

CN224535012UActive Publication Date: 2026-07-21INST OF METROLOGY OF HEBEI PROVINCE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
INST OF METROLOGY OF HEBEI PROVINCE
Filing Date
2025-10-14
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing terrestrial laser scanners only perform spatial distance calibration in a two-dimensional plane, resulting in a single spatial dimension that cannot cover their application range and inaccurate calibration results.

Method used

Design a calibration device including a fixed portal frame with multiple spherical targets inside the frame. Combined with guide rails and slides, it realizes three-dimensional spatial distance calibration and eliminates Abbe error by using a laser interferometer to construct 210 sets of standard spatial distances.

Benefits of technology

It enables three-dimensional spatial calibration of ground laser scanners, expands the standard distance scale, makes the calibration results more accurate and consistent with actual use conditions, and offers flexible calibration methods.

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Abstract

The utility model relates to large -size measuring instrument calibration device technical field discloses a ground laser scanner calibration device, including fixed door shape's frame, at least two second spherical targets are fixedly arranged along the inboard of frame, the frame is at least two along longitudinal direction arrangement, the second spherical target sets up at the top and / or side of inboard of frame, the ground laser scanner of waiting for calibration is located fixed calibration position, the fixed calibration position is located in the frame or is located in the frame and is in the plane one side. Because the distribution of second spherical target is no longer on a plane, but is distributed in a three-dimensional space, the space distance is also longer, the change of distance is also more diversified, thus is closer to the scene when ground laser scanner actual work, makes ground laser scanner when calibrating more in line with actual working condition, and the calibration result is also more accurate.
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