Articles | Volume 5, issue 2
J. Sens. Sens. Syst., 5, 447–455, 2016
J. Sens. Sens. Syst., 5, 447–455, 2016
Regular research article
22 Dec 2016
Regular research article | 22 Dec 2016

Active magnetic levitation and 3-D position measurement for a ball viscometer

Friedrich Feichtinger et al.

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Cited articles

Cho, D., Kato, Y., and Spilman, D.: Sliding mode and classical controllers in magnetic levitation systems, IEEE Contr. Syst., 13, 42–48,, 1993.
Clara, S., Antlinger, H., and Jakoby, B.: An Electromagnetically Actuated Oscillating Sphere Used as a Viscosity Sensor, IEEE Sens. J., 14, 1914–1922,, 2014a.
Clara, S., Antlinger, H., and Jakoby, B.: Theoretical Analysis and Simulation Studies of the Orbiting Sphere Viscometer, IEEE Sens. J., 14, 3669–3676,, 2014b.
Earnshaw, S.: On the nature of the molecular forces which regulate the constitution of the luminiferous ether, Trans Camb. Phil. Soc., 7, 97–112, 1842.
Feichtinger, F.: Magnetisch gelagerte Kugel für ein Viskosimeter, Master's thesis, Johannes Kepler University, Linz,, 2015.
Short summary
We present a new technique which can be used in devices measuring the viscosity of a liquid. To this end, a steel ball is submerged in the liquid and levitated by magnetic forces. The ball's position is measured and controlled to keep the ball in a stable levitated position. The ball is then actuated to perform a circular motion through the liquid. This motion is measured and can be used to draw conclusions about the liquid's viscosity.