Symmetric Plate Resonators for Viscosity and Density Measurement
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In this contribution, we present a symmetric arrangement of resonating plates for viscosity and density measurement. Regarding the oscillation mode, the design resembles a tuning fork and is based on previously introduced resonating plate designs. It exhibits similar sensitivity to viscosity as the single plate resonators while having a lower damping when operated in the tuning fork mode. We introduce the new design and present the results of FE simulations in order to determine the associated eigenmodes and we examine the effects of the used actuation method on the sensor. Measurement results are presented which show the general dependence of the tuning fork design on viscosity and density as well as the differences exhibited by different modes, particularly the in phase and out of phase vibration modes of the plates.