Weld pool boundary and weld bead shape reconstruction based on passive vision in P-GMAW

A passive visual sensing system is established in this research, and clear weld pool images in pulsed gas metal arc welding （ P-GMA W） can be captured with this system. The three-dimensional weld pool geometry, especially the weld height, is not only a crucial factor in determining workpiece mechanical properties, but also an important parameter for reflecting the penetration. A new three-dimensional （3D） model is established to describe the weld pool geometry in P-GMAW. Then, a series of algorithms are developed to extract the model geometrical parameters from the weld pool images. Furthermore, the method to reconstruct the 3 D shape of weld pool boundary and weld bead from the two-dimensional images is investigated.

三维激光彩色扫描系统的研究

本文介绍了三维重建的主要方法,在此基础之上详细介绍了我们研制的三维激光彩色扫描系统的基本原理,在硬件及其控制部分和软件处理部分中分别介绍了这两部分的原理及实现方法,最后给出了实验结果。