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

HAN Qinglin; LI Dayong; LI Xinlei; HAN Changle; ZHANG Guangjun

doi:10.12073/j.hjxb.20200418001

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2020 > 41(9): 28-32. > DOI: 10.12073/j.hjxb.20200418001

HAN Qinglin, LI Dayong, LI Xinlei, HAN Changle, ZHANG Guangjun. Bead geometry measurement for wire and arc additive manufacturing using active-passive composite vision sensing based on regional filter[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(9): 28-32. DOI: 10.12073/j.hjxb.20200418001

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

1.
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin Institute of Technology, Harbin 150001, China
2.
Bohai Shipyard Group Co., Ltd, huludao, 125003, China

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Received Date: April 17, 2020
Available Online: November 05, 2020

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Abstract

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.
- wire and arc additive manufacturing,
- regional dimming,
- active-passive composite vision sensing,
- bead geometries

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References (10)

References

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