Laser & Optoelectronics Progress, Volume. 59, Issue 12, 1215007(2022)
Positioning Method of Positive Circular Weld with Left and Right Swing Interferences of Robot
Because the circular weld in the pipeline lacks point and straight-line features, research to automatically locate the welds in the pipeline using a monocular vision nondestructive testing robot is still challenging. The localization of positive circular welds under the influence of the robot’s left and right swings is investigated in this paper. The governing equation of the special simultaneous localization and mapping (SLAM) problem for locating the distance between the positive circular weld and the inspection robot is established using the geometric imaging model of the circular weld in the inspection robot camera and the robot’s motion speed. The problem of solving the governing equation is transformed into a loss function minimization optimization problem. As the optimization problem is highly nonlinear, this paper employs a genetic algorithm to solve it and achieves the positive annular weld location while the robot swings from side to side. Using the synthetic video of the robot detecting the circular weld in the cylindrical pipe and the video captured during the actual operation, experimental results show that the proposed method can achieve good results.
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Xiang Dong, Qiaosheng Feng, Junfei Xia, Yaping Zhang. Positioning Method of Positive Circular Weld with Left and Right Swing Interferences of Robot[J]. Laser & Optoelectronics Progress, 2022, 59(12): 1215007
Category: Machine Vision
Received: Mar. 18, 2021
Accepted: Jun. 27, 2021
Published Online: May. 23, 2022
The Author Email: Feng Qiaosheng (vonqs2010@sohu.com)