Time-frequency analysis of laser weld signature

@inproceedings{Sun2001TimefrequencyAO,
  title={Time-frequency analysis of laser weld signature},
  author={Allen Sun and Elijah Kannatey-Asibu and William J. Williams and Mark J. Gartner},
  booktitle={SPIE Optics + Photonics},
  year={2001}
}
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… 
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