研究目的
Investigating the calibration method of 1D laser rangefinder for large-scale 3D measurement under harsh environment.
研究成果
The proposed calibration method effectively addresses the challenges of large-scale 3D measurement under harsh working environments, achieving millimeter-level accuracy within a 20 m distance. This method eliminates the need for camera calibration and imaging of laser spots under harsh conditions, offering a cost-effective and efficient solution.
研究不足
The measurement error increases with the increase of measurement distance and the horizontal and vertical divergence angles.
1：Experimental Design and Method Selection:
The calibration principle involves establishing a corresponding relationship between pixel coordinates of laser spots on the imaging plane and measurement distances generated from 1D laser rangefinder under good working environment.
2：Sample Selection and Data Sources:
An optical calibration plate is used to receive the laser spots and defined as the target plane. The target plane is freely moved in front of LRF and camera.
3：List of Experimental Equipment and Materials:
Includes a laser rangefinder, camera, and optical calibration plate.
4：Experimental Procedures and Operational Workflow:
The target plane is placed in 27 positions to capture images of laser spots and obtain measurement distances. The corresponding relationships are fitted by Levenberg-Marquardt method.
5：Data Analysis Methods:
The pixel coordinates of laser spots and measurement distances are analyzed to establish the calibration model.
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