钨极惰性气体保护焊熔池表面三维恢复算法及其可视化

摘要： 针对焊接熔池具有高动态、不规则的镜面等特性，在已有的熔池表面激光点阵熔池镜面反射三维恢复算法的基础上，建立了为实现钨极惰性气体保护焊熔池表面三维恢复的数学模型.对于不同的三维凸面和三维凹面，利用新的算法来实现熔池表面的三维恢复，激光经过不同的三维面形反射后在成像屏上形成不同分布的激光点阵,并编写相应程序进行了可视化研究.结果表明：所建立的数学模型根据成像屏上形成的激光点阵分布的高低程度不同、紧密程度不一致等，反映出熔池表面高低形态的变化趋势，但要能更准确地反映动态的三维熔池表面，需添加更多的约束条件.

Algorithm and Three-Dimensional Reconstruction for Tungsten Inert Gas Arc Welding Pool Surface

Abstract： To measure the highly dynamic and irregular mirror surface of the welding pool, the mathematical model for reconstructing the TIG welding three dimensional surface was proposed based on the existing algorithm. To reconstruct the three dimensional surface of different convex and concave using the new algorithm, lasers were reflected by different three-dimensional surface reforming different lasers dots matrix distribution on the imaging screen. The Matlab software was used to compile the corresponding procedures for the visualization of the welding pool. The result shows that mathematical model can better reflect the level of the welding pool surface successfully by relying on the lasers dots matrix distribution on the imaging screen, but in order to improve the reconstruction accuracy, more constraints should be applied.
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