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Electrical Capacitance Tomography to Measure Moisture Distribution of Polymer Foam in a Microwave Drying Process

Hosseini, Marzieh; Kaasinen, Anna; Link, Guido 1; Lahivaara, Timo; Vauhkonen, Marko
1 Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM), Karlsruher Institut für Technologie (KIT)


Moisture distribution information is a critical element in drying processes. The drying of products by employing high-power microwave (MW) technology is widely used in the industry. Although microwaves allow volumetric and selective heating resulting in a significant reduction of processing time and energy consumption, there is always a risk of non-uniform moisture distribution in the final product. This paper investigates the capability of a designed electrical capacitance tomography (ECT) sensor to estimate the moisture distribution of polymer foams in a microwave drying process. The moisture distribution is estimated based on the non-intrusive contactless measurements of the electrical capacitances between the electrodes mounted on a frame around the target polymer foam. The obtained moisture information can be employed as feedback to a controller to adjust the power level of each microwave source in the microwave system to reduce or eliminate the non-homogeneity of the moisture distribution inside the polymer foam. In a series of experiments, we first examine the capability of the ECT sensor in estimating the moisture distribution in a stationary foam. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000134006
Veröffentlicht am 26.11.2021
DOI: 10.1109/JSEN.2021.3085762
Zitationen: 10
Web of Science
Zitationen: 7
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Karlsruher Institut für Technologie (KIT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 15.08.2021
Sprache Englisch
Identifikator ISSN: 1530-437X, 1558-1748
KITopen-ID: 1000134006
HGF-Programm 38.03.02 (POF IV, LK 01) Power-based Fuels and Chemicals
Erschienen in IEEE Sensors Journal
Verlag Institute of Electrical and Electronics Engineers (IEEE)
Band 21
Heft 16
Seiten 18101 - 18114
Vorab online veröffentlicht am 03.06.2021
Schlagwörter Electrical capacitance tomography, moisture measurements, microwave drying
Nachgewiesen in Web of Science
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