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2 Zeszyty Naukowe. Elektryka / Politechnika Łódzka

2 2009

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Electrical tomography imaging of flotation process in a mechanical flotation cell

Kourunen J., Rinne A., Saloheimo K., Niitti T., Heikkinen L. M.

Zeszyty Naukowe. Elektryka / Politechnika Łódzka

2009

z. 114

41-45

A method for the measurement of the spatial distribution of a gas hold-up and a three-phase mixture in a mechanical flotation cell is proposed. The proposed method is based on electrical impedance tomography (EIT). The method was tested in a 50 1 flotation cell. The gas hold-up distribution 5 presented at various values of the impeller speed and aeration rate. The measurement with three-phase mixture is carried out with an apatite pulp. In this case, the conductivity distribution of the three-phase mixture is calculated and presented.

A PXI-based electrical impedance tomography system for industrial use

Kourunen J., Savolainen T., Lehikoinen A., Vauhkonen M., Heikkinen L. M.

Zeszyty Naukowe. Elektryka / Politechnika Łódzka

2009

z. 114

69-74

A design of an electrical impedance tomography system for three-dimensional and real-time imaging of ndustrial processes is described. The system is based on modular and easily extended PXI platform. In this case, the system consists of 16 parallel current injection channels and 80 parallel voltage measurement channels. The maximum of the frame rate of the system is about 100 frames/second depending on the configuration of the system. In order to study the quality of the system several laboratory tests are performed. Furthermore, two laboratory experiments are shown to verify the performance of the whole system.