Number of the records: 1
Correlation between camera image and photodiode signal during laser welding
- 1.
SYSNO ASEP 0511782 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title Correlation between camera image and photodiode signal during laser welding Author(s) Horník, Petr (UPT-D) RID, ORCID, SAI
Mrňa, Libor (UPT-D) RID, ORCID, SAI
Šebestová, Hana (UPT-D) RID, ORCID, SAINumber of authors 3 Source Title Lasers in Manufakturing. LIM 2019. Book of Abstracts. - München : WLT, 2019 Number of pages 5 s. Publication form Medium - C Action Lasers in Manufakturing. LIM 2019 Event date 24.06.2019 - 27.06.2019 VEvent location München Country DE - Germany Event type EUR Language eng - English Country DE - Germany Keywords laser welding ; photodiode ; high-speed camera ; correlation ; monitoring Subject RIV JR - Other Machinery OECD category Automation and control systems R&D Projects TH04010366 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) TG03010046 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Institutional support UPT-D - RVO:68081731 Annotation Photodiodes are often used to monitor weld quality. This solution has the advantage of simplicity and low cost, but it may be more difficult to interpret the measured data. Moreover, measurement with multiple photodiodes indicates dependency of the measured intensity on the photodiode position. The purpose of this study is to better understand the data measured during the laser welding process. Therefore we explore which part of the high-speed camera image best corresponds to photodiode intensity during welding. Regions of interest including weld pool and vapour plume are selected from camera images. The regions are compared with the photodiode using correlation coefficient. Subsequently, the task is generalized, and the photodiode is compared directly with each pixel of the camera. This creates a map describing which parts of the image most closely correspond to the photodiode signal. In addition, the results are also viewed in relation to back-reflected laser radiation. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2020
Number of the records: 1