Method and system for calibrating laser scanner

Abstract

The invention relates to a method and a system for calibrating a laser scanner. A plurality of marking points are distributed in a working area of the laser scanner; the laser scanner is controlled to lift at a constant speed along the axis vertical to the scanning direction, and the working area is measured and imaged; local coordinates of the scanning center of the laser scanner before and after the lifting are acquired by a reference ranger; local coordinates of the marking points are acquired by the reference ranger; marking points in the point cloud of the laser scanner and instrument coordinates thereof are identified, and the scanning time for the marking points is extracted; the local coordinates of the center of the laser scanner are calculated according to the scanning time for the marking points, and a conversion relationship from an instrument coordinate system to a local coordinate system is solved. Therefore, the method and the system overcome the defect of instability caused by artificial participation in controlling target pole movement in the traditional mode, and acquire high-precision calibration results.

Description

technical field [0001] The present invention relates to a laser scanner, especially a two-dimensional laser scanner based on line scanning for distance measurement; more specifically, the present invention relates to a method for calibrating the scanner to determine its internal error, and A calibration system for implementing the method. It belongs to the technical field of remote sensing earth observation and geographic information system construction. Background technique [0002] The main purpose of the calibration of the laser scanner is to verify whether its performance meets the nominal technical indicators, and to compensate for the systematic errors found during the calibration process. And identify scanners whose system errors are too large to be tolerated or cannot be corrected by compensation. [0003] Due to the characteristics of the working principle of the line-scanning laser scanner, it cannot accurately image a specific point but can only scan "line-by-li...

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to overcome the shortcomings of the traditional laser scanner calibration method, which has a large manual workload and difficult actual operation (requires the cooperation of many people), and provides a method that can automatically perform the calibration process and process without manual intervention. Calibration method of laser scanner for realizing high-precision calibration and calibration system for realizing the method

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