Assessment of the spatial distribution of moisture content in granular material using Electrical Impedance Tomography
Authors:
- Jan Porzuczek
Abstract
This paper presents a method for the online determination of the spatial distribution of the moisture content in granular material. It might be essential for the monitoring and optimal control of, for example, drying processes. The proposed method utilizes Electrical Impedance Tomography (EIT). As an exemplary material for experimental research, the black chokeberry (Aronia melanocarpa) was used. The relationship between the electrical impedance of the chokeberry and its moisture content was determined for a wide range of frequencies (20 Hz–200 kHz). The EIT research consisted of both simulation and experimental investigation. Experimental studies of the spatial distribution of the moisture content were performed in a cylindrical vessel equipped with 8 electrodes circumferentially arranged. The voltage signal from the electrodes was acquired simultaneously using the data acquisition module. Due to the high impedance of the chokeberries, exceeding 10^9 ohm for the dried matter, extraordinary instrumentation was necessary to be applied. On the other hand, raw chokeberry was characterized by a several orders of magnitude lower impedance (10^3–10^4 ohm), especially for high frequencies. The wide range of the observed impedance was able to be measured owing to its use of the voltage stimulation instead of the current stimulation (which is most common for EIT). The image reconstruction problem was solved using an iterative Gauss–Newton algorithm and the EIDORS (Electrical Impedance Tomography and Diffuse Optical Tomography Reconstruction Software) package. The obtained results showed a satisfactory ability to localize an insufficiently dried part of the material. Prospective ways to improve the imaging quality are also discussed.
- Record ID
- CUTfc2b97cacbe6457e95a786e6533a0381
- Publication categories
- ; ;
- Author
- Journal series
- Sensors, ISSN , e-ISSN 1424-8220, Biweekly
- Issue year
- 2019
- Vol
- 19
- No
- 12
- Pages
- [1-15]
- Article number
- 2807
- Other elements of collation
- rys.; wykr.; Bibliografia (na s.) - 14-15; Bibliografia (liczba pozycji) - 34; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 19, Iss. 12, Spec. Iss.
- Substantive notes
- Special Issue Selected Papers from the 9th World Congress on Industrial Process Tomography, [Bath, 2-6.09.2018]
- Conference
- 9th World Congress on Industrial Process Tomography (WC-IPT-9), 2018, 02-09-2018 - 06-09-2018, Bath, Wielka Brytania
- Keywords in English
- drying process, Electrical Impedance Tomography (EIT), impedance spectroscopy, chokeberry, EIDORS
- DOI
- DOI:10.3390/s19122807 Opening in a new tab
- URL
- https://www.mdpi.com/1424-8220/19/12/2807 Opening in a new tab
- Related project
- Zaawansowane metody modelowania i pomiarów w technice cieplnej - cz. 2. . Project leader at PK: , ,
Działalność statutowa - Language
- eng (en) English
- License
- Score (nominal)
- 100
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTfc2b97cacbe6457e95a786e6533a0381/
- URN
urn:pkr-prod:CUTfc2b97cacbe6457e95a786e6533a0381
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.