Michail E. Kiziroglou

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The difficulty of maximizing the proof mass, and lack of broadband operation, are key issues for miniaturized energyharvesting devices. Here, a novel electrostatic energy harvester is presented, employing an external free-rolling proof mass to address these issues. A description of the operating principle is given, and the kinetic dynamics of the cylinder(More)
A motion-powered pulse generator using piezoelectric transduction is reported in this paper for wireless sensing devices. A metallic rolling ball is implemented in the prototype as an inertial proof mass excited by external motions at random low frequency. Taking advantage of the metallic proof mass, magnetic coupling can be achieved to actuate the(More)
Thermoelectric energy harvesting requires a substantial temperature difference ΔΤ to be available within the device structure. This has restricted its use to particular applications such as heat engine structural monitoring, where a hot metal surface is available. An alternative approach is possible in cases where the ambient temperature undergoes regular(More)
One of the main challenges in developing wireless biometric sensors is the requirement for integration of various systems into a very compact device. Such systems include sensing units, conditioning electronics, transmitters and power supplies. In this work, a novel system integration architecture is presented. A unique feature of this new architecture is(More)
The use of energy harvesting for powering wireless sensors is made more challenging in most applications by the requirement for customization to each specific application environment because of specificities of the available energy form, such as precise location, direction and motion frequency, as well as the temporal variation and unpredictability of the(More)
Soon, pervasive computers will enormously outnumber humans. Devices requiring sufficient energy to operate maintenance-free for periods of years and beyond render today's technologies insufficient. With the gap between energy requirements of embedded systems and achievable levels of harvested power reducing, viable hybrid energy and power management(More)
Pervasive sensing—the capability to deploy large numbers of sensors, to link them to communication networks, and to analyze their collective data—is transforming many industries. In mining, networked sensors are already used for remote operation, automation, including driverless vehicles, health, and safety, and exploration. In this paper, the(More)
There are two simple methods of supplying power to a wireless, low-power sensor in an aircraft: a battery, or direct access to the aircraft power line. In the former, the battery will eventually need to be replaced whilst the latter option, which is highly intrusive and difficult to retrofit into existing aircraft, increases the weight and presents(More)
This paper presents a piezoelectric pulse generator for body sensing and wireless transmission. A steel rolling ball is used as a proof mass to provide a smooth motion excited by non-harmonic external vibrations. In addition, the proof mass in this prototype is implemented to achieve both impulse excitation of the piezoelectric cantilever by magnetic(More)