Simultaneous Burr and Cut Interruption Detection during Laser Cutting with Neural Networks

In this contribution, we compare basic neural networks with convolutional neural networks for cut failure classification during fiber laser cutting. The experiments are performed by cutting thin electrical sheets with a 500 W single-mode fiber laser while taking coaxial camera images for the classif...

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Main Authors: Benedikt Adelmann, Ralf Hellmann
Format: Article
Language:English
Published: MDPI AG 2021-08-01
Series:Sensors
Subjects:
Online Access:https://www.mdpi.com/1424-8220/21/17/5831
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author Benedikt Adelmann
Ralf Hellmann
author_facet Benedikt Adelmann
Ralf Hellmann
author_sort Benedikt Adelmann
collection DOAJ
description In this contribution, we compare basic neural networks with convolutional neural networks for cut failure classification during fiber laser cutting. The experiments are performed by cutting thin electrical sheets with a 500 W single-mode fiber laser while taking coaxial camera images for the classification. The quality is grouped in the categories good cut, cuts with burr formation and cut interruptions. Indeed, our results reveal that both cut failures can be detected with one system. Independent of the neural network design and size, a minimum classification accuracy of 92.8% is achieved, which could be increased with more complex networks to 95.8%. Thus, convolutional neural networks reveal a slight performance advantage over basic neural networks, which yet is accompanied by a higher calculation time, which nevertheless is still below 2 ms. In a separated examination, cut interruptions can be detected with much higher accuracy as compared to burr formation. Overall, the results reveal the possibility to detect burr formations and cut interruptions during laser cutting simultaneously with high accuracy, as being desirable for industrial applications.
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spelling doaj.art-8fdb006a20ce4ffabf724a1cc67d65652023-11-22T11:13:05ZengMDPI AGSensors1424-82202021-08-012117583110.3390/s21175831Simultaneous Burr and Cut Interruption Detection during Laser Cutting with Neural NetworksBenedikt Adelmann0Ralf Hellmann1Applied Laser and Photonics Group, Faculty of Engineering, University of Applied Sciences Aschaffenburg, Wuerzburger Straße 45, 63739 Aschaffenburg, GermanyApplied Laser and Photonics Group, Faculty of Engineering, University of Applied Sciences Aschaffenburg, Wuerzburger Straße 45, 63739 Aschaffenburg, GermanyIn this contribution, we compare basic neural networks with convolutional neural networks for cut failure classification during fiber laser cutting. The experiments are performed by cutting thin electrical sheets with a 500 W single-mode fiber laser while taking coaxial camera images for the classification. The quality is grouped in the categories good cut, cuts with burr formation and cut interruptions. Indeed, our results reveal that both cut failures can be detected with one system. Independent of the neural network design and size, a minimum classification accuracy of 92.8% is achieved, which could be increased with more complex networks to 95.8%. Thus, convolutional neural networks reveal a slight performance advantage over basic neural networks, which yet is accompanied by a higher calculation time, which nevertheless is still below 2 ms. In a separated examination, cut interruptions can be detected with much higher accuracy as compared to burr formation. Overall, the results reveal the possibility to detect burr formations and cut interruptions during laser cutting simultaneously with high accuracy, as being desirable for industrial applications.https://www.mdpi.com/1424-8220/21/17/5831laser cuttingquality monitoringartificial neural networkburr formationcut interruptionfiber laser
spellingShingle Benedikt Adelmann
Ralf Hellmann
Simultaneous Burr and Cut Interruption Detection during Laser Cutting with Neural Networks
Sensors
laser cutting
quality monitoring
artificial neural network
burr formation
cut interruption
fiber laser
title Simultaneous Burr and Cut Interruption Detection during Laser Cutting with Neural Networks
title_full Simultaneous Burr and Cut Interruption Detection during Laser Cutting with Neural Networks
title_fullStr Simultaneous Burr and Cut Interruption Detection during Laser Cutting with Neural Networks
title_full_unstemmed Simultaneous Burr and Cut Interruption Detection during Laser Cutting with Neural Networks
title_short Simultaneous Burr and Cut Interruption Detection during Laser Cutting with Neural Networks
title_sort simultaneous burr and cut interruption detection during laser cutting with neural networks
topic laser cutting
quality monitoring
artificial neural network
burr formation
cut interruption
fiber laser
url https://www.mdpi.com/1424-8220/21/17/5831
work_keys_str_mv AT benediktadelmann simultaneousburrandcutinterruptiondetectionduringlasercuttingwithneuralnetworks
AT ralfhellmann simultaneousburrandcutinterruptiondetectionduringlasercuttingwithneuralnetworks