Numerical and Experimental Investigation on Contactless Resonant Sensors

Abstract : This paper reports numerical and experimental investigation on a (bulk and etch silicon on insulator) BESOI MEMS device. The implemented contactless actuation principle, exploits Lorentz forces exerted on a conductive-non magnetic surface of the sensor. These forces derive from the interaction between the eddy-currents and the radial magnetic field, both generated by a sinusoidally driven external inductor. Both excitation and readout strategies are performed remotely via a magnetic strategy. The sensor proposed here has been first analytically and numerically studied by using CoventorWareTM 2008, then the device prototype has been fabricated and a preliminary experimental campaign has been performed to characterize the system in terms of variation of its resonance frequency against changes in the sensor mass.
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Sensors and Actuators A: Physical , Elsevier, 2010, 162 (2), pp.329-335. 〈10.1016/j.sna.2010.04.009〉
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Carlo Trigona, Salvatore Baglio, Bruno Andò, Nicolò Savalli, Marco Baù, et al.. Numerical and Experimental Investigation on Contactless Resonant Sensors. Sensors and Actuators A: Physical , Elsevier, 2010, 162 (2), pp.329-335. 〈10.1016/j.sna.2010.04.009〉. 〈lirmm-00580564〉

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