Remote electromagnetic excitation of miniaturized in-plane plate resonators for sensing applications

For the purpose of measuring the viscosity of complex structured liquids, a novel type of resonator is employed. A metallic frame with a spring-mounted plate in its center is placed in a magnetic field exhibiting a constant and a superposed sinusoidal component. This way, a dominant in-plane motion is excited. The numerical analysis of the frequency response shows a useable viscosity range up to approx. 1 Paldrs in a frequency range below 1500 Hz. Experiments demonstrate the feasibility of the concept, which is suited for further miniaturization.