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Process Monitoring

XARION powder bed fusion monitoring

Materials & Design 08/2021

Mutual comparison of acoustic, pyrometric and thermographic laser powder bed fusion monitoring

Authors:

Kai Gutknecht, Michael Cloots, et. al.

Contents:
  • The process monitoring capabilities of three distinctive sensors (XARION’s optical microphone, a pyrometer and a thermographic camera) were compared for laser powder bed fusion metal additive manufacturing
  • The optical microphone presents a sensitivity up to 40 times higher than the thermographic camera and is 15 times more sensitive than the pyrometer
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LANE 2020

Proceedings of LANE 2020 Erlangen 

In situ process monitoring by optical microphone for crack detection in Laser Metal Deposition applications

Authors:

Camilo Prieto, Roberto Fernandez, et.al.

Contents:
  • Contact-free crack detection in Laser Metal Deposition (LMD) applications in collaboration with AIMEN successfully documented
  • XARION’s optical microphone, Eta250 Ultra, enabled real-time monitoring of crack and process signals of additive manufacturing applications
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Proceedings of SPIE LASE 2020 San Francisco 

Air-coupled membrane-free optical microphone and optical coherence tomography keyhole measurements to setup welding laser parameters

Authors:

Nicolas Authier, Enzo Touzet, et. al.

Contents:
  • Accurate measurements of the welding depth could be demonstrated with XARION's sensor by the French Alternative Energies and Atomic Energy Commission (CEA)
  • The combination of Optical Coherence Tomography with airborne ultrasound data from an Optical Microphone is a promising match for in-line monitoring of laser welding processes
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Bachelor Thesis University Ravensburg-Weingarten 

Acousto-optical Process Control for Laser Ablation and Laser Welding

Authors:

Chen Peng

Contents:
  • The optical microphone has proven effective and invaluable as a measurement instrument during laser processes.
  • The measurements obtained are useful in:
    • the automated calibration of the optimum focus spot of a laser beam,
    • controlling the laser ablation quality in a production line without modifying the workpiece, and
    • identifying keyhole formation (or lack thereof) during laser welding processes. 
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LASER 06/2019

Akustische Überwachung für die Lasermaterialbearbeitung (German)

Authors:

Christian Schröter, Ryan Sommerhuber, et al.

Contents:
  • Contact-free monitoring of laser welding, cutting and structuring
  • Real-time determination of ideal focus position and unwanted zinc contamination
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Ceramic Industry 02/2019

Non-Contact Ultrasound Diagnostics for the Ceramic Industry

Authors:

Fabian Lücking

Contents:
  • Detection of tiny cracks in ceramic workpieces with the help of XARION's optical microphone
  • Monitoring of acoustic emissions without the need for physically contacting the workpiece 
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Structual Control Health Monitoring Journal 03/2019

Online cracking detection by means of optical techniques in laser‐cladding process

Authors:

Aitor García de la Yedra, Michael Pfleger, et al.

Contents:
  • This paper shows that XARION’s sensor technology can be used for the in-process monitoring of a laser-cladding process.
  • Comparison of the optical microphone against other online monitoring systems for laser cladding processes 
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Laser Technik Journal 05/2017

Acoustic Process Control for Laser Material Processing

Authors:

Balthasar Fischer, Wolfgang Rohringer, et al.

Contents:
  • New approach for in-line process monitoring for laser material processing 
  • Emitted ultrasound reveals information about laser weld penetration depth 
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