Calibration method and device for track geometric detection system

Abstract

The invention discloses a calibration method and device for a track geometric detection system. The method comprises: collecting a plurality of plane calibration plate images of calibration targets under different postures through cameras in laser camera components on the left and right sides in the track geometric detection system, wherein the calibration targets comprise a connecting rod and two plane calibration plates arranged at the two ends of the connecting rod, a plurality of uniformly distributed mark points are arranged on the plane calibration plates, and the calibration targets are arranged in the working range of the laser camera assemblies on the left side and the right side; extracting feature points of each plane calibration plate image, and constructing a nonlinear optimization objective function according to the extracted feature point pairs of the left and right plane calibration plates; and according to the nonlinear optimization objective function, obtaining a transformation relation between camera coordinate systems in the laser camera assemblies on the left and right sides. According to the invention, the transformation relation between the camera coordinate systems in the left and right laser camera assemblies can be calibrated.

Description

technical field [0001] The invention relates to the technical field of track detection, in particular to a calibration method and device for a track geometry detection system. Background technique [0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] In the current track geometry detection system, the transformation relationship of the camera coordinate systems of the left and right laser camera components is not calibrated, that is, the transformation relationship of the two camera coordinate systems is an unknown parameter, which will cause many problems, such as the inability to associate the left and right two The spatial position relationship of the laser camera components cannot be judged whether the left and right laser planes are coplanar, and the measurement results of the laser camera compone...

AI Technical Summary

Problems solved by technology

[0003] In the current track geometry detection system, the transformation relationship of the camera coordinate systems of the left and right laser camera components is not calibrated, that is, the transformation relationship of the two camera coordinate systems is an unknown parameter, which will cause many problems, such as the inability to associate the left and right two Due to the spatial positional relationship of the laser camera components, it is impossible to judge whether the left and right laser planes are installed on the same plane, and the measurement results of the laser camera components on both sides cannot be expressed in the same coordinate system, etc.

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