System and method for the automatic early detection of leaks in service pipes and or evaluation and checking of water network conditions through the use of a plurality of sensors and a plurality of local collector nodes associated to a... more
System and method for the automatic early detection of leaks in service pipes and or evaluation and checking of water network conditions through the use of a plurality of sensors and a plurality of local collector nodes associated to a central server configured to receive and process the information from the plurality of the local collector nodes.
Research Interests:
Research Interests:
Research Interests:
The wireless commiiunication lhas kniown a great development in the past few7vears and its businiess has become a big market. Indeed. many standards emerged and the manufacturers adapted their products to fulfill a better integration... more
The wireless commiiunication lhas kniown a great development in the past few7vears and its businiess has become a big market. Indeed. many standards emerged and the manufacturers adapted their products to fulfill a better integration reducing the size, weight and ...
Research Interests:
Wireless sensors networks enable the chance to investigate with enhanced freedom physical phenomena, aiming to increase the informative content obtained by sensors measurements. In this work we will focus on a system allowing to... more
Wireless sensors networks enable the chance to investigate with enhanced freedom physical phenomena, aiming to increase the informative content obtained by sensors measurements. In this work we will focus on a system allowing to experimentally measure pressure profiles obtained from sensor nodes deployed on a NACA0012 aircraft wing model. By exploiting measurements gathered from sensors, allowing to measure pressure fluctuations of ±600Pa with a resolution of 4Pa, together with results obtained by Computational Fluid Dynamics (CFD) models, the system enables extracting flow profile, thus obtaining information on flow separation and stall phenomenon. Wireless measures are delivered with an enhanced version of IEEE802.15.4e, allowing to decrease power consumption by a factor of 7. Packet routing, based on Routing Protocol for Low-Power and Lossy Networks (RPL), has been improved by means of a newly introduced Lifetime and Latency Aggregatable Metric (L2AM) leading to a 18% increased network lifetime.
Research Interests:
Wireless sensor networks are drawing much attention as an effective means to enable the Internet of Things. In this context, energy efficiency is an important requirement in applications where battery-powered sensing devices are... more
Wireless sensor networks are drawing much attention as an effective means to enable the Internet of Things. In this context, energy efficiency is an important requirement in applications where battery-powered sensing devices are exploited. Battery power saving can be addressed using many techniques, concerning different layers of the OSI model. This work addresses energy consumption in MAC protocols from a transceiver usage perspective. We first describe a set of protocols that includes IEEE 802.15.4 and IEEE 802.15.4e DSME. Then, we analyze their energy consumption and propose a set of Enhancements for Low-Power Instrumentation DSME Applications. Finally, given a wireless network topology, we compare the performance of the above mentioned protocols by simulations. Obtained results show that, for end devices, the proposed approach allows an energy consumption reduction up to a factor of 9 with respect to the IEEE 802.15.4, while enabling for higher throughput, and up to a factor of 7 with regard to native IEEE 802.15.4e DSME.
Research Interests:
ABSTRACT The ability to gather and analyze distributed data adding value to extracted information is a core concept in the Internet of Things. Smart-Objects with multi-sensor capability further enhance environmental awareness with... more
ABSTRACT The ability to gather and analyze distributed data adding value to extracted information is a core concept in the Internet of Things. Smart-Objects with multi-sensor capability further enhance environmental awareness with coherent and meaningful information. In this paper we first investigate a modular architecture for multi-sensors Smart-Objects allowing to ease their customization and maintainability. Then, we introduce and detail an efficient and flexible inter-device communication protocol: flexSPI. Built on top of Serial Peripheral Interface (SPI), the proposed approach allows reducing routing overhead and enabling modularity by exploiting packet-oriented messaging. To achieve these improvements, SPI bus is completely shared between connected devices avoiding conflicts by keeping free (i.e. in input direction) the Slave Output/Master Input SOMI signal and occupying it only after proper, advanced addressing. Low power and high bandwidth characteristics of SPI bus are maintained while enabling smart features such as hotpluggability, link diagnosis, devices discovery, synchronization and master solicitation.
Research Interests:
Wireless sensors networks enable the chance to investigate with enhanced freedom physical phenomena, aiming to increase the informative content obtained by sensors measurements. In this work we will focus on a system allowing to... more
Wireless sensors networks enable the chance to
investigate with enhanced freedom physical phenomena, aiming
to increase the informative content obtained by sensors measurements.
In this work we will focus on a system allowing to
experimentally measure pressure profiles obtained from sensor
nodes deployed on a NACA0012 aircraft wing model. By exploiting
measurements gathered from sensors, allowing to measure
pressure fluctuations of ±600Pa with a resolution of 4Pa,
together with results obtained by Computational Fluid Dynamics
(CFD) models, the system enables extracting flow profile, thus
obtaining information on flow separation and stall phenomenon.
Wireless measures are delivered with an enhanced version of
IEEE802.15.4e, allowing to decrease power consumption by a
factor of 7. Packet routing, based on Routing Protocol for Low-
Power and Lossy Networks (RPL), has been improved by means
of a newly introduced Lifetime and Latency Aggregatable Metric
(L2AM) leading to a 18% increased network lifetime.
investigate with enhanced freedom physical phenomena, aiming
to increase the informative content obtained by sensors measurements.
In this work we will focus on a system allowing to
experimentally measure pressure profiles obtained from sensor
nodes deployed on a NACA0012 aircraft wing model. By exploiting
measurements gathered from sensors, allowing to measure
pressure fluctuations of ±600Pa with a resolution of 4Pa,
together with results obtained by Computational Fluid Dynamics
(CFD) models, the system enables extracting flow profile, thus
obtaining information on flow separation and stall phenomenon.
Wireless measures are delivered with an enhanced version of
IEEE802.15.4e, allowing to decrease power consumption by a
factor of 7. Packet routing, based on Routing Protocol for Low-
Power and Lossy Networks (RPL), has been improved by means
of a newly introduced Lifetime and Latency Aggregatable Metric
(L2AM) leading to a 18% increased network lifetime.
Research Interests:
Piezoelectric materials enable the conversion of ambient vibration into electrical energy. The development of piezoelectric energy harvesting systems needs accurate models for systemperformance evaluation. Mechanical researchers build... more
Piezoelectric materials enable the
conversion of ambient vibration into electrical energy.
The development of piezoelectric energy harvesting
systems needs accurate models for systemperformance
evaluation. Mechanical researchers
build distributed models for energy scavengers,
simplifying the energy harvesting circuit and using
analytical derivation, while electrical researchers
focus on the modeling of the energy harvesting circuit
and simplifying the structural conditions of the
scavenging devices. The challenges for accurate
modeling of such electro-mechanical systems remain,
when complicated mechanical conditions and
practical energy harvesting circuits are considered in
system design. This article addresses the abovementioned
problem, employing an equivalent circuit,
which bridges the structural modeling and electrical
functionality, allowing simulations of complex
circuitry. The equivalent circuit has been simulated
using SPICE software. Measurements are performed
for verification of the proposed model.
conversion of ambient vibration into electrical energy.
The development of piezoelectric energy harvesting
systems needs accurate models for systemperformance
evaluation. Mechanical researchers
build distributed models for energy scavengers,
simplifying the energy harvesting circuit and using
analytical derivation, while electrical researchers
focus on the modeling of the energy harvesting circuit
and simplifying the structural conditions of the
scavenging devices. The challenges for accurate
modeling of such electro-mechanical systems remain,
when complicated mechanical conditions and
practical energy harvesting circuits are considered in
system design. This article addresses the abovementioned
problem, employing an equivalent circuit,
which bridges the structural modeling and electrical
functionality, allowing simulations of complex
circuitry. The equivalent circuit has been simulated
using SPICE software. Measurements are performed
for verification of the proposed model.
Research Interests:
Wireless sensor networks are drawing much attention as an effective mean to enable the Internet of Things. In this context, energy efficiency is an important issue to meet in applications where battery-powered sensing devices are... more
Wireless sensor networks are drawing much attention
as an effective mean to enable the Internet of Things. In
this context, energy efficiency is an important issue to meet in
applications where battery-powered sensing devices are exploited.
Battery power saving can be addressed using many techniques,
concerning different layers of the OSI model. This work addresses
energy request in MAC protocols from a transceiver usage
perspective. We first describe a set of protocols that includes
IEEE 802.15.4 and IEEE 802.15.4e DSME. Then, we analyze
their energy consumption and propose a set of Enhancements for
Low-Power Instrumentation DSME Applications. Finally, given
a wireless network topology, we compare the performance of the
above mentioned protocols by simulations. Obtained results show
that, for end devices, the proposed approach allows an energy
consumption reduction up to a factor of 9 with respect to the
IEEE 802.15.4, while enabling for higher throughput, and up to
a factor of 7 with regard to native IEEE 802.15.4e DSME.
as an effective mean to enable the Internet of Things. In
this context, energy efficiency is an important issue to meet in
applications where battery-powered sensing devices are exploited.
Battery power saving can be addressed using many techniques,
concerning different layers of the OSI model. This work addresses
energy request in MAC protocols from a transceiver usage
perspective. We first describe a set of protocols that includes
IEEE 802.15.4 and IEEE 802.15.4e DSME. Then, we analyze
their energy consumption and propose a set of Enhancements for
Low-Power Instrumentation DSME Applications. Finally, given
a wireless network topology, we compare the performance of the
above mentioned protocols by simulations. Obtained results show
that, for end devices, the proposed approach allows an energy
consumption reduction up to a factor of 9 with respect to the
IEEE 802.15.4, while enabling for higher throughput, and up to
a factor of 7 with regard to native IEEE 802.15.4e DSME.
Research Interests:
Research Interests:
This paper focuses on a new approach of the frequency synthesizer, which appears well adapted to the various communication standards. Multi-standard and multi-functionality are explained, and the complex frequency synthesizer (frequency... more
This paper focuses on a new approach of the frequency synthesizer, which appears well adapted to the various communication standards. Multi-standard and multi-functionality are explained, and the complex frequency synthesizer (frequency generation unit) is entirely described. This entity provides local oscillators for different communication links. Through behavioral simulations, this paper details the functionality of this system and permits us to draw up the specifications for the main building blocks of the FGU.