Harms, Julius
[Author];
Kern, Thorsten Alexander
[Author]
;
Technische Universität Hamburg,
Technische Universität Hamburg Institut für Mechatronik im Maschinenbau
Design and potential analysis of an eddy current sensor for inductive conductivity measurement in fluids
Footnote:
Sonstige Körperschaft: Technische Universität Hamburg
Sonstige Körperschaft: Technische Universität Hamburg, Institut für Mechatronik im Maschinenbau
Description:
In the scope of this paper, a first exemplary eddy current sensor for seawater conductivity measurement is developed, based on the derived sensor theory of a previous work. By high-frequency excitation, eddy currents are induced in the fluid and are counter-fields measured with a sensing coil. The coil’s resonance point is used for amplification. The developed prototype is analyzed based on a derived transfer function and FEM simulations. The theory is validated using a prototype implementation. With conducted experiments on a sensor test bench, the characteristics are confirmed and disturbances identified. It is shown that frequencies exist where temperature influence is minimal. This work gives a perspective for a novel sensor to allow seawater conductivity measurement.