Continuous acoustic emission monitoring by data streaming oscilloscopes

0519649 - ÚT 2020 RIV CZ eng A - Abstrakt
Chlada, Milan - Převorovský, Zdeněk
Continuous acoustic emission monitoring by data streaming oscilloscopes.
NDT in Progress 2019. Praha: Ústav termomechaniky AV ČR, v. v. i., 2019 - (Převorovský, Z.). s. 113-113. ISBN 978-80-87012-72-7.
[NDT in Progress 2019 /10./. 07.10.2019-10.10.2019, Praha]
Grant CEP: GA ČR(CZ) GA17-22615S
Institucionální podpora: RVO:61388998
Klíčová slova: acoustic emission * material characterization * streaming oscilloscopes
Obor OECD: Materials engineering

Acoustic Emission (AE) method widely used for non-destructive evaluation and material characterization is very beneficial for monitoring of highly dynamic damage processes. Computational power of contemporary regular hardware enables to test the new approaches in this field as it could not be done before without the capability of continuous signal recording and analysis. Modern portable measuring devices as USB oscilloscopes with data streaming feature can be flexibly controlled by scripts tailored for particular experiment. AE activity can be thereby evaluated on-line in more detail by specially designed parameters. The running experiment can be controlled by actual state of material damage as well. Such approach is demonstrated during the test of titanium alloys for orthopedic
implants. The AE method provided comprehensive data to identify the initial stages of damage and crack propagation in the stressed specimen. AE measuring and evaluating system based on USB oscilloscope TiePie was completely designed and run in Matlab environment, displaying basic AE parameters, audibly monitoring captured AE hits and saving those parameters together with the complete signal stream in binary format for further advanced analysis.
Trvalý link: http://hdl.handle.net/11104/0304946