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URN to cite this document: urn:nbn:de:bvb:703-epub-7564-9
Title data
Bifano, Luca ; Weider, Marco ; Fischerauer, Alice ; Wolf, Gotthard ; Fischerauer, Gerhard:
In situ monitoring of used-sand regeneration in foundries by impedance spectroscopy.
In: Journal of Sensors and Sensor Systems.
Vol. 11
(2022)
Issue 2
.
- pp. 287-298.
ISSN 2194-878X
DOI der Verlagsversion: https://doi.org/10.5194/jsss-11-287-2022
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Project information
| Project title: |
Project's official title Project's id Open Access Publizieren No information |
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| Project financing: |
Bayerisches Staatsministerium für Wissenschaft, Forschung und Kunst |
Abstract
This work deals with the impedimetric monitoring of used-sand regeneration in the foundry industry. During the regeneration of used sand, a quartz sand similar to new sand is produced from already used molding and core sand, which especially serves to produce new cores. We explore whether the regeneration progress can be assessed in situ based on measured impedance spectra and their features. The impedances of plate capacitors filled with different typical used-sand mixtures, consisting of quartz sand, coal dust, and bentonite, were repeatedly measured in a frequency range from 500 Hz to 1 MHz. The reproducibility of the measurements proved to be sufficient for practical applications. The mean impedances were plotted in Nyquist diagrams. From these plots, systematic impedance–composition correlations could be determined for two of the three component systems. Conclusions about the regeneration state could be drawn from the impedance curves by introducing various features. These were the median, the mean, and the standard deviation of the frequency-dependent resistance and reactance. With these indicators, it was then possible to establish one-to-one relations between the material composition of the molding materials and the impedance measurement. In field measurements on regenerated used sands, this observation was confirmed, and the regeneration progress was observed on the basis of the impedimetrically determined characteristic data.
Further data
| Item Type: | Article in a journal |
|---|---|
| DDC Subjects: | 600 Technology, medicine, applied sciences > 620 Engineering |
| Institutions of the University: | Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology > Chair Measurement and Control Technology - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer Profile Fields > Emerging Fields Profile Fields > Emerging Fields > Energy Research and Energy Technology Research Institutions > Research Units > Zentrum für Energietechnik - ZET Faculties Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology Profile Fields Research Institutions Research Institutions > Research Units |
| Language: | English |
| Originates at UBT: | Yes |
| URN: | urn:nbn:de:bvb:703-epub-7564-9 |
| Date Deposited: | 18 Mar 2024 09:12 |
| Last Modified: | 18 Mar 2024 09:13 |
| URI: | https://epub.uni-bayreuth.de/id/eprint/7564 |
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