| 基于分区减光的电弧增材制造熔敷道尺寸主被动联合视觉检测 |
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| 引用本文： | 韩庆璘,李大用,李鑫磊,韩常乐,张广军.基于分区减光的电弧增材制造熔敷道尺寸主被动联合视觉检测[J].焊接学报,2020,41(9):28-32. |
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| 作者姓名： | 韩庆璘 李大用 李鑫磊 韩常乐 张广军 |
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| 作者单位： | 1.哈尔滨工业大学，先进焊接与连接国家重点实验室，哈尔滨， 150001 |
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| 基金项目： | 国家重点研发计划;广东省重点领域研发计划资助项目 |
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| 摘 要： | 设计了电弧增材制造熔敷道成形尺寸主被动联合视觉检测方法，以克服结构光主动视觉传感的滞后性与被动视觉传感的信息单一性. 为了实现极高亮度的熔池与极低亮度的结构光条纹在同一CCD靶面同时清晰成像，提出了分区减光策略，对熔池与结构光条纹进行差异化的减光，使二者光强在减光之后水平相当，进而清晰成像. 相机成像光路分析表明，需要将分区减光元件设置在镜头前方一倍焦距以外或镜头后方焦点与靶面之间. 该方法实现了单CCD在一幅图像中同时清晰拍摄熔池和结构光条纹. 开发了一套图像处理算法，实时提取出了熔敷道尺寸. 结果表明，熔敷道高度检测误差优于0.1 mm，宽度检测误差优于0.2 mm.
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| 关 键 词： | 电弧增材制造 分区减光 主被动联合视觉传感 成形尺寸 |
| 收稿时间： | 2020-04-18 |
Bead geometry measurement for wire and arc additive manufacturing using active-passive composite vision sensing based on regional filter |
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| Affiliation: | 1.State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin Institute of Technology, Harbin 150001, China2.Bohai Shipyard Group Co., Ltd, huludao, 125003, China |
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| Abstract: | An active-passive composite vision sensing system was designed to overcome the delay of active vision sensing and limited information on passive vision sensing. To capture the high brightness molten pool and low brightness structured light clearly in one image, a regional dimming method was proposed to make their brightness decline to the same level. Lightpath analysis showed that the regional dimming filter must be placed in front of the focal point before the lens, or between the CCD sensor and the focal point behind the lens. The molten pool and structured light have been clearly presented in one image using this system. An image processing algorithm for online measurement of bead geometries is proposed. The experimental results showed that the measurement error of bead height is less than 0.1 mm, and that of bead width is less than 0.2 mm. |
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