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In-situ Characterization of Bulk Goods Using Electrical Capacitance Tomography

Title data

Fischerauer, Alice ; Kandlbinder-Paret, Christoph ; Fischerauer, Gerhard:
In-situ Characterization of Bulk Goods Using Electrical Capacitance Tomography.
In: Himmel, Jörg ; Erni, Daniel ; Fischerauer, Alice ; Kanoun, Olfa ; Lukjanov, Gennadij ; Seeger, Thomas ; Thelen, Klaus (ed.): Industrial and medical measurement and sensor technology, vehicle sensor technnology : IEEE Workshop 2017. - Mülheim a. d. Ruhr : University of Applied Sciences Ruhr West , 2017 . - pp. 28-29 . - (Series of lectures of the University of Applied Sciences Ruhr West ; 6 )
ISBN 978-3-9814801-9-1

Abstract in another language

For the production of cast components at a foundry moulds made of sand are used. These “form sands” (shaping of the outer surfaces) or “core sands” (moulding of cavities) consist of special raw sands mixed with binding agents that influence the tensile and compressive strength as well as the temperature behavior of the mould. In order to achieve a high quality of the cast components the sand mixture has to remain stable throughout the production cycle. Since foundries nowadays aim at waste reduction and raw material conservation as well as cost cutting, the form sands get
reprocessed and recycled into the production. This recycling process however changes the properties of the sand mixture and makes it necessary to decide whether it is still usable.
Usually the sand’s characteristics are being tested by sampling extraction at pre-defined intervals. This has the disadvantage that no in situ monitoring of the sand quality takes place over the cross section of the delivery pipe during conveyance of the material. Some of the sand’s characteristics of interest in this context are the grain size distribution, the material composition and the sand moisture. Since these qualities are reflected in the electrical properties of the form sand, each batch shows a specific impedance spectrum and a certain spatial distribution of its relative permittivity over the monitored cross section. This study describes the examination of bulk materials by means of electrical capacitance tomography
(ECT). ECT is a technique which uses a multi-electrode sensor enclosing the object of interest. In industrial
application this very often means a pipe containing two or more materials of different permittivity. From the measurement of the capacitances of all possible pair-by-pair combinations of the sensor electrodes a cross sectional image of the material distribution in the vessel can be reconstructed.

Further data

Item Type: Article in a book
Refereed: No
Institutions of the University: 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: 03 Dec 2020 10:51
Last Modified: 03 Dec 2020 10:51
URI: https://eref.uni-bayreuth.de/id/eprint/60721