Detection of welding wire length by active S11 measurement
- A novel method to determine the extruded length of a metallic wire for a directed energy deposition (DED) process using a microwave (MW) plasma jet with a straight-through wire feed is presented. The method is based on the relative comparison of the measured frequency response obtained by the large-signal scattering parameter (Hot-S) technique. In the practical working range, repeatability of less than 6% for a nonactive plasma and 9% for the active plasma state is found. Measurements are conducted with a focus on a simple solution to decrease the processing time and reduce the integration time of the process into the existing hardware. It is shown that monitoring a single frequency for magnitude and phase changes is sufficient to achieve good accuracy. A combination of different measurement values to determine the length is possible. The applicability to different diameter of the same material is shown as well as a contact detection of the wire and metallic substrate.
Author: | Christoph SchoppORCiD, Felix Rohrbach, Luc Langer, Holger HeuermannORCiD |
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DOI: | https://doi.org/10.1109/TPS.2024.3356659 |
ISSN: | 0093-3813 (Print) |
ISSN: | 1939-9375 (Online) |
Parent Title (English): | IEEE Transactions on Plasma Science |
Publisher: | IEEE |
Document Type: | Article |
Language: | English |
Year of Completion: | 2024 |
Tag: | Circuit simulation; Hot S-parameter; Modeling; Plasma; Plasma diagnostics |
Issue: | Early Access |
First Page: | 1 |
Last Page: | 6 |
Link: | https://doi.org/10.1109/TPS.2024.3356659 |
Zugriffsart: | campus |
Institutes: | FH Aachen / Fachbereich Elektrotechnik und Informationstechnik |
collections: | Verlag / IEEE |