高功率光纤激光焊金属蒸气图像辐射亮度的三维重建

摘要/Abstract

摘要：

以光纤传像束为基础搭建激光焊金属蒸气的多角度同步成像平台，从平台的3个方向获取金属蒸气的二维投影图像，并以二维投影图像为基础，采用基于中心投影模型的代数迭代法进行金属蒸气图像的三维重建，以获得金属蒸气图像辐射亮度的三维分布.结果表明：对于高功率激光焊接而言，金属蒸气图像的辐射亮度呈现出由内到外而逐渐降低的变化趋势，其中心部分的辐射亮度分布并不连续，且存在相对孤立的离散区域；当匙孔的开口与激光入射点重合时，金属蒸气的尺寸较小且贴近于工件表面；当熔池波动而造成匙孔失稳时，金属蒸气图像出现了形态异常和较为显著的尺寸变化.

关键词: , 激光焊, 金属蒸气, 动态行为, 辐射亮度, 三维重建, 空间结构

衡昊坤a，蔡艳a,b，盛洁a，周媛a，王敏a,b. 高功率光纤激光焊金属蒸气图像辐射亮度的三维重建[J]. 上海交通大学学报（自然版）, 2017, 51(5): 526-.

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