Development of a characteristic point detecting seam tracking algorithm for portable welding robots

Doyoung Chang, Donghoon Son, Namsoo Kim, Jongwon Kim, Jungwoo Lee, Tae Wan Kim, Kyu Yeul Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

A double-hulled structure is a typical hazardous environment found in the shipbuilding areas. Therefore many efforts have been made for automation, especially for the welding tasks. However, constraints such as size and weight limits of the robot and the randomness of the tasks have made automation very difficult. Therefore simple and robust algorithms are preferable in this typical field. In this paper a seam tracking algorithm for weaving weld path planning using a laser displacement sensor is developed. It is designed to enable portable robots detect the seam of very irregular single butt welding profiles. The algorithm consists of four steps; Scan, Filtering, Generation of reference points, Path planning. In the scan process depth data of a cross section of the profile is obtained. Next, Gaussian filter is used to remove noise from the raw data. A differential characteristic point detection algorithm is applied to the filtered data to detect the reference points which represent the shape and location of the gap of the profile to be welded. Finally path planning for single-V butt multi-pass welding is done based on these reference points. The algorithm is validated through welding experiments.

Original languageEnglish (US)
Title of host publicationROSE 2010 - 2010 IEEE International Workshop on Robotic and Sensors Environments, Proceedings
Pages146-151
Number of pages6
DOIs
StatePublished - Dec 1 2010
Externally publishedYes
Event2010 8th IEEE International Workshop on Robotic and Sensors Environments, ROSE 2010 - Phoenix, AZ, United States
Duration: Oct 15 2010Oct 16 2010

Publication series

NameROSE 2010 - 2010 IEEE International Workshop on Robotic and Sensors Environments, Proceedings

Other

Other2010 8th IEEE International Workshop on Robotic and Sensors Environments, ROSE 2010
CountryUnited States
CityPhoenix, AZ
Period10/15/1010/16/10

Keywords

  • Characteristic point detection
  • Component
  • Laser displacement sensor
  • Seam tracking algorithm
  • Welding robot

ASJC Scopus subject areas

  • Artificial Intelligence
  • Environmental Engineering

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