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Scalar Reflectometry as a Means of Catalyst Monitoring Suitable for Field Applications

Titelangaben

Królak, Radosław ; Fischerauer, Gerhard:
Scalar Reflectometry as a Means of Catalyst Monitoring Suitable for Field Applications.
In: Measurement. Bd. 137 (April 2019) . - S. 278-286.
ISSN 0263-2241
DOI: https://doi.org/10.1016/j.measurement.2019.01.030

Abstract

It is known that electrochemical systems can be investigated nondestructively through their interaction with electromagnetic fields or waves. In particular, microwaves have been demonstrated to be of value in this context. However, the microwave-based monitoring of electrochemical systems such as catalytic converters has only been demonstrated on test benches with laboratory equipment such as vector network analyzers. We propose a measuring system based on a scalar reflectometer operating at frequencies between 1 and 6 GHz to solve this issue. The contribution describes its design, its characteristics, and its performance in connection with estimating resonance frequencies from which catalyst properties can be inferred. Special emphasis has been placed on taking into account the typical constraints encountered in
field applications. These include: limited computational power; high electric losses in the catalytic materials,
hence microwave resonances with low Q; and dynamic processes, hence limited measurement times.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Catalyst; TWC; microwave resonator; scalar reflectometer; state observation; NDT
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik > Lehrstuhl Mess- und Regeltechnik - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 08 Feb 2019 09:24
Letzte Änderung: 08 Feb 2019 09:24
URI: https://eref.uni-bayreuth.de/id/eprint/47228