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

Title data

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

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Catalyst; TWC; microwave resonator; scalar reflectometer; state observation; NDT
Institutions of the University: Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology > Chair Measurement and Control Technology - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 08 Feb 2019 09:24
Last Modified: 08 Feb 2019 09:24
URI: https://eref.uni-bayreuth.de/id/eprint/47228