Bead geometry measurement for wire and arc additive manufacturing using active-passive composite vision sensing based on regional filter

被引：0
|
作者：
Han Q. [1 ]
Li D. [2 ]
Li X. [1 ]
Han C. [1 ]
Zhang G. [1 ]
机构：
[1] State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin Institute of Technology, Harbin
[2] Bohai Shipyard Group Co., Ltd, Huludao
来源：
Zhang, Guangjun (zhanggj@hit.edu.cn) | 1600年 / Harbin Research Institute of Welding卷 / 41期
关键词：
Active-passive composite vision sensing; Bead geometries; Regional dimming; Wire and arc additive manufacturing;
D O I：
10.12073/j.hjxb.20200418001
中图分类号：
学科分类号：
摘要：
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. Copyright © 2020 Transactions of the China Welding Institution. All rights reserved.
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页码：28 / 32
页数：4
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