College of Computer Science and Technology, Changchun Normal University, Changchun 130032, China.
Sensors (Basel). 2022 Dec 20;23(1):13. doi: 10.3390/s23010013.
A multi-line structured light measurement method that combines a single-line and a three-line laser, in which precision sliding rails and displacement measurement equipment are not required, is proposed in this paper. During the measurement, the single-line structured light projects onto the surface of an object and the three-line structured light remains fixed. The single-line laser is moved and intersects with the three-line laser to form three intersection points. The single-line light plane can be solved using the camera coordinates of three intersection points, thus completing the real-time calibration of the scanned light plane. The single-line laser can be scanned at any angle to determine the overall complete three-dimensional (3D) shape of the object during the process. Experimental results show that this method overcomes the difficulty of obtaining information about certain angles and locations and can effectively recover the 3D shape of the object. The measurement system's repetition error is under 0.16 mm, which is sufficient to measure the 3D shapes of complicated workpieces.
本文提出了一种结合单线和三线激光的多线结构光测量方法，该方法不需要精密滑动导轨和位移测量设备。在测量过程中，单线结构光投射到物体表面，而三线结构光保持固定。移动单线激光并使其与三线激光相交，形成三个交点。通过三个交点的相机坐标可以求解单线光平面，从而完成扫描光平面的实时标定。单线激光可以以任意角度扫描，从而在整个过程中确定物体的整体完整三维（3D）形状。实验结果表明，该方法克服了获取某些角度和位置信息的困难，可以有效地恢复物体的 3D 形状。测量系统的重复误差在 0.16mm 以内，足以测量复杂工件的 3D 形状。
