A High-Resolution Fully Inkjet Printed Resonant Mass Sensor

The rapid prototyping of low-cost sensors is assuming strategic importance in several application fields. In this paper, a fully inkjet printed mass sensor proposed. device consists poly-ethylene terephthalate (PET) cantilever beam, which driven to its resonant mode by an electromagnetic actuation mechanism, implemented through the interaction between current impulse flowing planar coil (inkjet on PET beam), and permanent magnet, facing coil. Target masses are positioned close beam end. sensing methodology, based relationship first natural frequency target mass, strain gauge across fixed end cantilever). operating confers intrinsic robustness against instabilities structure (e.g., residual stress material magnet–coil distance. latter indeed changes as function values. friction-less another shortcoming sensor, well feature arising from adopted technology. As far we know, solution proposed example sensor. range 0–0.36 g while resolution order 1.0 mg, thus addressing crucial A Q factor around 35 has been estimated, confirms suitable performances term selectivity resolution.