In this paper, a novel device for sensing perturbationsimposed to liquid media contained in a disposable housing is addressed.The device consists of a glass beaker filled with deionizedwater surrounding a small volume of ferrofluid; a permanentmagnet is used to fix the position of the ferrofluidic mass in acompliant position and to generate spikes due to the Rosensweigeffect. The effect of external stimuli on the beaker can be estimatedby measuring the perturbation produced on the ferrofluidic mass.The latter strategy allows reducing drawbacks related to staticfriction of conventional inertial devices. The ferrofluid perturbationsare monitored by two external planar coils in a differentialconfiguration. The main features of the proposed strategy arestructural decoupling between the electric read-out system andbeaker housing, which allows both implementing noninvasivemeasurementin liquid media and making the architecture partiallydisposable, of low cost, and suitable for real applications.
|Titolo:||A Ferrofluidic Inertial Sensor exploiting the Rosensweig effect|
|Data di pubblicazione:||2010|
|Appare nelle tipologie:||1.1 Articolo in rivista|