Research on the motion-free axis synchronization of a novel translational linear structured light scanning system

Abstract

The line-structured light three-dimensional measurement system has the advantages of non-contact, low cost, and high speed. A line mobile structured light scanner measurement system is designed in this paper. The surface scanning process based on line structured light measurement in the fixed camera coordinate system is realized. The single-line structured light emitter is fixed on the slider of the linear module, and a multi-line structured light emitter is added to assist in calculating the light plane equation of the single-line structured light. The system doesn’t need to calibrate the trajectory of the linear module slider in the camera coordinate system, and there is no need to synchronize the timestamps of camera image acquisition and motor encoding reading. The error of calculating the parameters of the light plane equation caused by the time difference between the encoder and image acquisition is eliminated. Experiments show that the design has high precision and dense point clouds.