0

Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Time-frequency analysis of laser weld signature

[+] Author Affiliations
Allen S. Sun, Elijah Kannatey-Asibu, Jr., William J. Williams

Univ. of Michigan (USA)

Mark Gartner

Ford Motor Co. (USA)

Proc. SPIE 4474, Advanced Signal Processing Algorithms, Architectures, and Implementations XI, 103 (November 20, 2001); doi:10.1117/12.448639
Text Size: A A A
From Conference Volume 4474

  • Advanced Signal Processing Algorithms, Architectures, and Implementations XI
  • Franklin T. Luk
  • San Diego, CA, USA | July 29, 2001

abstract

Reliable monitoring methods are essential for maintaining a high level of quality control in laser welding. In industrial processes, monitoring systems allow for quick decisions on the quality of the weld, allowing for high productions rates and reducing overall cost due to scrap. A monitoring system using infrared, ultraviolet, audible sound, and acoustic emission was implemented for monitoring CO2 laser welds in real-time. The signals were analyzed using time-frequency analysis techniques. The time-frequency distribution using the Choi-Williams kernel was calculated, and the resulting distributions were analyzed using the Renyi information distribution. Results for porosity monitoring showed that an acoustic emission sensor held the most promise with 100% classification in two weld studies. These encouraging results led to a second study for monitoring of weld penetration and in the second case, infrared, ultraviolet, and audible sound showed the most promise with 100% classification for both laboratory and industrial data.

© (2001) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Allen S. Sun ; Elijah Kannatey-Asibu, Jr. ; William J. Williams and Mark Gartner
"Time-frequency analysis of laser weld signature", Proc. SPIE 4474, Advanced Signal Processing Algorithms, Architectures, and Implementations XI, 103 (November 20, 2001); doi:10.1117/12.448639; http://dx.doi.org/10.1117/12.448639


Access This Article
Sign In to Access Full Content
Please Wait... Processing your request... Please Wait.
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
 

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement


Buy this article ($18 for members, $25 for non-members).
Sign In