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An electromagnetic time-reversal imaging algorithm for moisture detection in polymer foam in an industrial microwave drying system

Omrani, Adel; Yadav, Rahul; Link, Guido; Lähivaara, Timo; Vauhkonen, Marko; Jelonnek, John


Microwave tomography (MWT) based control is a novel idea in industrial heating systems for drying polymer foam. In this work, an X-band MWT module is designed and developed using a fixed antenna array configuration and integrated with the HEPHAISTOS industrial heating system. A decomposition of the time-reversal operator (DORT) algorithm with a proper Green’s function of multilayered media is utilized to localize the moisture location. The derived Green’s function can be applied to the media with low or high contrast layers. It is shown that the time-reversal imaging (TRI) with the proposed Green’s function can be applied to the multilayered media with a moderately rough surface. Moreover, a single frequency TRI is proposed to decrease the measurement time. Numerical results for different moisture scenarios are presented to demonstrate the efficacy of the proposed method. The developed method is then tested on the experimental data for different moisture scenarios from our developed MWT experimental prototype. Image reconstruction results show promising capabilities of the TRI algorithm in estimating the moisture location in the polymer foam.

Verlagsausgabe §
DOI: 10.5445/IR/1000140452
Veröffentlicht am 07.12.2021
DOI: 10.3390/s21217409
Zitationen: 5
Web of Science
Zitationen: 5
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Hochfrequenztechnik und Elektronik (IHE)
Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 08.11.2021
Sprache Englisch
Identifikator ISSN: 1424-8220
KITopen-ID: 1000140452
HGF-Programm 38.03.02 (POF IV, LK 01) Power-based Fuels and Chemicals
Erschienen in Sensors
Verlag MDPI
Band 21
Heft 21
Seiten Art.Nr. 7409
Projektinformation TOMOCON (EU, H2020, 764902)
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagwörter microwave drying; microwave tomography; time-reversal imaging; dyadic Green’s function; multilayered media
Nachgewiesen in Dimensions
Web of Science
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