TY - GEN
T1 - Real-time measurement of the weld pool surface in GTAW process
AU - Zhang, Weijie
AU - Liu, Yukang
AU - Zhang, Yuming
PY - 2013
Y1 - 2013
N2 - This study aims at real-time measurement /reconstruction of the specular three-dimensional (3D) weld pool surface under strong arc in gas tungsten arc welding (GTAW). A vision-based sensing system is used to project a dot-matrix laser pattern on the weld pool surface which is able to specularly reflect the laser pattern. This reflection pattern, deformed by the weld pool surface has been utilized to reconstruct the 3D shape of the weld pool surface. Based on careful analysis, the underlying reconstruction problem is formulated mathematically. An analytic algorithm is proposed resulting in the weld pool surface be reconstructed in real-time on average in 3:22 milliseconds. In order to verify the effectiveness of the proposed reconstruction algorithm, it is tested on objects with a priori knowledge of geometry having a specular surface. Then the robustness of the proposed reconstruction scheme is further validated using a real-time experiment.The detailed analysis of measurement error validates the accuracy of the proposed algorithm.
AB - This study aims at real-time measurement /reconstruction of the specular three-dimensional (3D) weld pool surface under strong arc in gas tungsten arc welding (GTAW). A vision-based sensing system is used to project a dot-matrix laser pattern on the weld pool surface which is able to specularly reflect the laser pattern. This reflection pattern, deformed by the weld pool surface has been utilized to reconstruct the 3D shape of the weld pool surface. Based on careful analysis, the underlying reconstruction problem is formulated mathematically. An analytic algorithm is proposed resulting in the weld pool surface be reconstructed in real-time on average in 3:22 milliseconds. In order to verify the effectiveness of the proposed reconstruction algorithm, it is tested on objects with a priori knowledge of geometry having a specular surface. Then the robustness of the proposed reconstruction scheme is further validated using a real-time experiment.The detailed analysis of measurement error validates the accuracy of the proposed algorithm.
KW - GTAW
KW - Real Time
KW - Reconstruction
KW - Three-dimensional Weld Pool Surface
UR - http://www.scopus.com/inward/record.url?scp=84882271404&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84882271404&partnerID=8YFLogxK
U2 - 10.1109/I2MTC.2013.6555692
DO - 10.1109/I2MTC.2013.6555692
M3 - Conference contribution
AN - SCOPUS:84882271404
SN - 9781467346221
T3 - Conference Record - IEEE Instrumentation and Measurement Technology Conference
SP - 1640
EP - 1645
BT - 2013 IEEE International Instrumentation and Measurement Technology Conference
T2 - 2013 IEEE International Instrumentation and Measurement Technology Conference: Instrumentation and Measurement for Life, I2MTC 2013
Y2 - 6 May 2013 through 9 May 2013
ER -