New methods for monitoring laser welding process in the manufacture of solar absorbers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F16%3APU140277" target="_blank" >RIV/00216305:26210/16:PU140277 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mmscience.eu/journal/issues/november-2016/articles/new-methods-for-monitoring-laser-welding-process-in-the-manufacture-of-solar-absorbers" target="_blank" >https://www.mmscience.eu/journal/issues/november-2016/articles/new-methods-for-monitoring-laser-welding-process-in-the-manufacture-of-solar-absorbers</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17973/MMSJ.2016_11_2016125" target="_blank" >10.17973/MMSJ.2016_11_2016125</a>

Jazyk výsledku

angličtina

Název v původním jazyce

New methods for monitoring laser welding process in the manufacture of solar absorbers

Popis výsledku v původním jazyce

Laser welding is a modern method of fusion welding. Due to high welding speeds is necessary to use the machinery welding. This leads to the need for the detection and eventually the elimination of weld defects. Penetration laser welding is not accessible to direct observation and therefore can be monitored only indirectly. A new of possibility is the study of plasma radiation forming over the keyhole using autocorrelation analysis. The intensity of plasma radiation approaching deterministic noise, therefore, commonly used FFT analysis does not produce satisfying results. The autocorrelation function finds repetitive sequences in the signal, which are related to the oscillation of the weld pool. Changes and irregularities in the frequency of these oscillations indicate weld defects and overall stability of the welding process. A series of welding experiments were studied. After the experiments, the autocorrelation functions were evaluated. Changes in frequency during the weld were related to the geometric characteristics of the weld.

Název v anglickém jazyce

New methods for monitoring laser welding process in the manufacture of solar absorbers

Popis výsledku anglicky

Laser welding is a modern method of fusion welding. Due to high welding speeds is necessary to use the machinery welding. This leads to the need for the detection and eventually the elimination of weld defects. Penetration laser welding is not accessible to direct observation and therefore can be monitored only indirectly. A new of possibility is the study of plasma radiation forming over the keyhole using autocorrelation analysis. The intensity of plasma radiation approaching deterministic noise, therefore, commonly used FFT analysis does not produce satisfying results. The autocorrelation function finds repetitive sequences in the signal, which are related to the oscillation of the weld pool. Changes and irregularities in the frequency of these oscillations indicate weld defects and overall stability of the welding process. A series of welding experiments were studied. After the experiments, the autocorrelation functions were evaluated. Changes in frequency during the weld were related to the geometric characteristics of the weld.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

MM Science Journal

ISSN

1803-1269

e-ISSN

1805-0476

Svazek periodika

2016

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

6

Strana od-do

1376-1381

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-84995615160