Possibilities in optical monitoring of laser welding process

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F16%3A00465805" target="_blank" >RIV/68081731:_____/16:00465805 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1117/12.2257234" target="_blank" >http://dx.doi.org/10.1117/12.2257234</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1117/12.2257234" target="_blank" >10.1117/12.2257234</a>

Result language
angličtina
Original language name
Possibilities in optical monitoring of laser welding process
Original language description
Laser welding is a modern, widely used but still not really common method of welding. With increasing demands on the quality of the welds, it is usual to apply automated machine welding and with on-line monitoring of the welding process. The resulting quality of the weld is largely affected by the behavior of keyhole. However, its direct observation during the welding process is practically impossible and it is necessary to use indirect methods. At ISI we have developed optical methods of monitoring the process. Most advanced is an analysis of radiation of laser-induced plasma plume forming in the keyhole where changes in the frequency of the plasma bursts are monitored and evaluated using Fourier and autocorrelation analysis. Another solution, robust and suitable for industry, is based on the observation of the keyhole inlet opening through a coaxial camera mounted in the welding head and the subsequent image processing by computer vision methods. A high-speed camera is used to understand the dynamics of the plasma plume. Through optical spectroscopy of the plume, we can study the excitation of elements in a material. It is also beneficial to monitor the gas flow of shielding gas using schlieren method.
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Optics and Measurement International Conference 2016 (Proceedings of SPIE 10151)
ISBN
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ISSN
0277-786X
e-ISSN
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Number of pages
6
Pages from-to
"1015110:1"-"6"
Publisher name
SPIE
Place of publication
Bellingham
Event location
Liberec
Event date
Sep 11, 2016
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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