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Measurement of the Dynamic and Liquid Weld Pool Under Glaring Arc Light with Femtometre Accuracy
Wang ZZ(王振洲); Yang YM(杨永明)
Department机器人学研究室
Conference NameInternational Workshop on Intelligentized Welding Manufacturing (IWIWM)
Conference DateJUN 23-26, 2017
Conference PlaceShanghai, PEOPLES R CHINA
Source PublicationTRANSACTIONS ON INTELLIGENT WELDING MANUFACTURING, VOL I, NO. 1 2017
PublisherSPRINGER-VERLAG SINGAPORE PTE LTD
Publication PlaceSINGAPORE
2017
Pages111-119
Indexed ByCPCI(ISTP)
WOS IDWOS:000451078400010
Contribution Rank1
ISSN2520-8519
ISBN978-981-10-5355-9; 978-981-10-5354-2
KeywordMeasurement Structured light Conformal mapping Single shot Weld pool
AbstractAccurate measurement of the 3D shape of the dynamic weld pool is of great importance for on-line welding process control and off-line welding phenomenon study. However, it remains challenging due to the following reasons. Firstly, the weld pool is dynamic and liquid with extremely high temperature, which requires a nondestructive single-shot measurement technique. Secondly, the specular surface and the ambient strong arc light prevent direct imaging by cameras. Here, we present a structured light technique that yields closed form solutions with femtometre accuracy to measure the dynamic shape of the weld pool produced by gas tungsten arc welding (GTAW). This technique makes use of the band-pass filter and the high penetrability of lasers to overcome the glaring arc light. The sampling points on the weld pool surface are measured by computing the intersections of the projected laser rays and the corresponding reflected laser rays analytically. A conformal mapping transforms the physical world into the virtual world to make the measurement free of optics aberrations. As a result, the achieved measurement accuracy is up to 10(-13) mm, which is significantly superior to state of art methods.
Language英语
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type会议论文
Identifierhttp://ir.sia.cn/handle/173321/23657
Collection机器人学研究室
Corresponding AuthorWang ZZ(王振洲)
AffiliationShenyang Institute of Automation, Chinese Academy of Science
Recommended Citation
GB/T 7714
Wang ZZ,Yang YM. Measurement of the Dynamic and Liquid Weld Pool Under Glaring Arc Light with Femtometre Accuracy[C]. SINGAPORE:SPRINGER-VERLAG SINGAPORE PTE LTD,2017:111-119.
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