Valeria Nico

Valeria Nico
University of Limerick | UL · Stokes Research Institute

About

17
Publications
1,378
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106
Citations
Citations since 2017
9 Research Items
98 Citations
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20172018201920202021202220230510152025

Publications

Publications (17)
Article
Full-text available
Electromagnetic vibrational energy harvesters (EM-VEHs) are generally used to convert ambient vibrations into electricity to energise low-power sensor nodes forming the Internet of Things (IoT). Usually such VEHs comprise of coils and magnets orientated in the vertical direction (z-direction) but these devices tend to be quite bulky and it is hard...
Article
Microfluidic technology witnessed a fast growth in recent years thanks to its diverse nature that allows its use in a wide range of industries including microelectronics, aerospace, telecommunications, biomedical and pharmaceutical. One of the limiting issues for the implementation of microfluidics in high end electronics or biomedical devices is t...
Article
Common vibrational energy harvesters are generally based on a linear mass spring oscillator model, and these typically show narrow bandwidth and high resonant frequency at small scales. To overcome these problems, a two-degree-of-freedom nonlinear velocity-amplified energy harvester has been developed. The device comprises two masses, relatively os...
Article
Full-text available
Electromagnetic Vibration Energy Harvesting (EM-VEH) is an attractive alternative to batteries as a power source for wireless sensor nodes that enable intelligence at the edge of the Internet of Things (IoT). Industrial environments in particular offer an abundance of available kinetic energy, in the form of machinery vibrations that can be convert...
Article
Conventional vibrational energy harvesters (VEHs) are generally based on a linear mass-spring oscillator model that features narrow bandwidth and high resonant frequencies at small scales. To overcome these limitations, a two-degree-of-freedom (2-Dof) velocity-amplified VEH was developed. The harvester comprises two masses, relatively oscillating o...
Chapter
Full-text available
In recent years the use of Wireless Sensor Networks (WSNs) has increased rapidly, enabled by the development of small and ultra-low power electronics. The majority of these sensors are battery powered, and this can lead to high maintenance costs when batteries have to be replaced. A practical solution to power sensor networks comes from kinetic ene...
Article
Full-text available
Conventional vibration energy harvesters are generally based on linear mass-spring oscillator models. Major limitations with common designs are their narrow bandwidths and the increase of resonant frequency as the device is scaled down. To overcome these problems, a two-degree-of-freedom nonlinear velocity-amplified energy harvester has been develo...
Article
Vibration energy harvesting extracts energy from the environment and can mitigate reliance on battery technology in wireless sensor networks. This article presents the nonlinear responses of two multi-mass vibration energy harvesters that employ a velocity amplification effect. This amplification is achieved by momentum transfer from larger to smal...
Article
Full-text available
Small-scale vibration energy harvesters that respond efficiently at low frequencies are challenging to realize. This paper describes the design and implementation of one such harvester, which achieves a high volumetric Figure of Merit (FoMv = 2.6% at 11.50 Hz) at the scale of a C-type battery and outperforms other state-of-the-art devices in the su...
Conference Paper
A two Degree-of-Freedom (2DoF) nonlinear electromagnetic energy harvester, which employs velocity amplification, with a volume of 26.7cm 3 and 25.6 cm3 (25.5mm diameter and 52.4mm height) is investigated in this work. These dimensions are very close to those of a C-battery (26.2mm diameter and 50mm length, for a volume of 27.8cm3), making the harve...
Conference Paper
Full-text available
In recent years, the development of small and low power electronics has led to the deployment of Wireless Sensor Networks (WSNs) that are largely used in military and civil applications. Vibrational energy harvesting can be used to power these sensors in order to obviate the costs of battery replacement. Vibrational energy harvesters (VEHs) are dev...
Article
A 2DOF velocity amplified electromagnetic vibrational energy harvester is analyzed. The system consists of two masses, one larger than the other, oscillating relative to each other in response to external excitation. The large mass is designed with a centrally located cavity into which a second smaller mass is placed. This configuration allows the...
Conference Paper
A two Degree of Freedom (2DOF) velocity-amplified electromagnetic vibrational energy harvester is presented. The device consists of two masses: a smaller mass which oscillates inside a larger one due to two sets of mechanical springs. The larger mass itself oscillates between two sets of springs. This configuration allows the larger mass to transfe...
Article
Vibrational energy harvesters (VEHs) are devices which convert ambient vibrational energy into electrical power, offering an alternative to batteries for powering wireless sensors. Detailed experimental characterisation of a 2-degree-of-freedom (2-Dof) VEH is presented in Part A of this paper, while a theoretical analysis is completed in Part B. Th...
Article
Full-text available
Vibrational energy harvesting has become relevant as a power source for the reduced power requirement of electronics used in wireless sensor networks (WSNs). Vibrational energy harvesters (VEHs) are devices that can convert ambient kinetic energy into electrical energy using three principal transduction mechanisms: piezoelectric, electromagnetic an...

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Projects

Project (1)
Project
The development of wide-band, tuneable vibrational energy harvesters utilising non-linear, multi-modal techniques. Target applications lie in the Internet of Things (IoT) area - applications such as industrial monitoring and transport.