一种线结构光自扫描测量系统的研究

Research of a iaser projector self-scanning measurement system

为了实现对复杂自由曲面的快速精确测量,提出了一种由CCD摄像机、振镜和激光线投射器组成的全视觉自扫描测量系统。该系统利用光学三角法确定了一种新的测量物体表面三维坐标的方式。基于该方式,此测量系统使用平面靶标实现了对摄像机内部参数的标定,借助振镜转动驱动激光平面完成了对摄像机视场内被测物体的扫描,最终根据激光平面方程和计算机二维平面图像信息获得了被测物体的三维数据。试验结果证明,该系统能以较快速度实现自由曲面的精确测量。

To meet the requirement of accurate and convenient 3D measurement for some complex free-form surface,a new kind of measurement method based on a full field of view scanning system was proposed,by the optical-triangulation.This system was mainly composed of a CCD camera,a galvanometer and a laser projector.The camera was calibrated by using a planar target and the mirror was rotated by a galvanometer reflects the laser plane and sweeps the measured objection in the view field of the camera.Based on this new method,the three coordinates of a point on the measured objection can be directly obtained by the laser plane equation and the stripe information on the computer 2D image.Experiment study result shows that the measure system possesses good accuracy and convenience.