中文摘要：

直接拍摄水下焊接熔池图像来检测焊接熔池宽度实现难度较大,提出了一种通过成形焊缝结构光条纹图像来完成水下焊接熔池宽度在线检测的方法。将装有防水罩的激光结构光视觉传感器安装在焊枪之后置于水下,针对水下成形焊缝图像特点,经图像加窗、拉普拉斯锐化、二值化以及数学形态学滤波和图像细化处理,就能够在线获得焊接熔池宽度。结果表明,处理过程速度快,检测结果精度高。当条纹检测点和熔池中心之间的距离小于35 mm时,焊接熔池宽度相对误差可控制在3%以内。

英文摘要：

It is very difficult to detect molten pool width by directly acquiring its in underwater welding.Based on strip-structured weld image,a on-line detection method of molten pool width is proposed.The laser-structured vision sensor is fixed behind the welding torch and put into water with waterproof guard.According to the feature of underwater weld image,the molten pool width is extracted through window processing,laplace sharpening,thresholding,mathematic morphology filtering and thinning procedure.The experi...