Characterizing Spatters in Laser Welding of Thick Steel Using Motion Flow Analysis

  • Olli Lahdenoja
  • Tero Säntti
  • Jonne Poikonen
  • Mika Laiho
  • Ari Paasio
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7944)

Abstract

Laser welding has become a very important method for industrial manufacturing. Despite of the inherent accuracy of laser welding, the resulting weld quality may still be affected by many dynamic conditions related to the operating parameters and to the properties of the welded material. Methods for monitoring the laser welding process are therefore needed to guarantee consistent manufacturing quality. In this paper, we present a method for characterizing spatters in laser welding of thick steel. Pre-processing and edge detection steps of the proposed algorithm are performed on-line with a very high speed by using a dedicated KOVA1 massively parallel image processing chip, and the actual characterization of the spatters is carried out off-line in Matlab. The methods proposed are simple and efficient, thus also facilitating possible integration of the whole algorithm for on-line processing.

Keywords

Motion flow Optical flow Spatters Laser welding Thick steel High-Speed Imaging 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Olli Lahdenoja
    • 1
  • Tero Säntti
    • 1
  • Jonne Poikonen
    • 1
  • Mika Laiho
    • 1
  • Ari Paasio
    • 1
  1. 1.Business and Innovation Development (BID) UnitUniversity of TurkuFinland

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