Alberto Ascia

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Inertial transducers based on the use of ferrofluids as inertial mass can be of great interest due to their peculiarities and due to the advantages that they show when compared to traditional devices. Ferrofluids are special solutions of magnetic particles in a carrier liquid whose density and other physical features can be controlled by an external(More)
Magnetic fluids are now widely used to implement transducer architectures. These fluids have valuable properties compared to traditional materials. In this column, a brief overview of magnetic fluids and their traditional uses in the field of transducers are given and some applications developed at the DIEES laboratory at the University of Catania, Italy(More)
In this paper modeling, prototyping and preliminary characterization of an innovative inclinometer based on ferrofluid is presented. It consists of a glass pipe where a drop of ferrofluid is contained in a water environment, a "retention coil" used to apply an elastic force to the ferrofluidic drop, a "differential sensing coil" to detect the ferrofluidic(More)
The development and realization of micropipettes and micropumps has captured the interest of people working in both biomedical and chemical areas for the capability of managing very low quantity of liquid (drug, biological liquid or expensive reagent) as well as everyone interested in controlling small flows for dedicated applications. In this paper a novel(More)
In this paper, a novel device for sensing perturbations imposed to liquid media contained in a disposable housing is addressed. The device consists of a glass beaker filled with deionized water surrounding a small volume of ferrofluid; a permanent magnet is used to fix the position of the ferrofluidic mass in a compliant position and to generate spikes due(More)
Magnetic bioassay is becoming of great interest in several application including magnetic separation, drug delivery, hyperthermia treatments, magnetic resonance imaging (MRI) and magnetic labelling. The latter can be used to localize bio-entities (e.g. cancer tissues) by using magnetic markers and high sensitive detectors. To this aim SQUIDs can be adopted,(More)
The availability of easily reconfigurable and reliable transducers is of main importance for several applications. Actually, sensors and actuators adopting ferrofluidic cores have been classified in that category for their intrinsic robustness against external shocks and the possibility to produce flexible architectures to be used for several uses, from the(More)
Color detection task is of main importance in several applications. Available devices suffer for high cost or very specific application area. In this paper, a novel color detector is presented. The device is based on a RGB sensor and a smart signal processing algorithm implemented on a microcontroller architecture. In order to perform a suitable and(More)
In this paper a new architecture implementing a ferrofluidic inclinometer in resonant configuration is presented. The new strategy represents a considerable improvement with respect to previous devices , in this case resonance is exploited in order to improve the device sensitivity. In particular, the supplementary excitation coils have been positioned very(More)