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This paper presents a current sensor for the 16 series Li-ion battery cells. In order to detect the large current of 3.0 A at 57.6 V charging voltage and avoid the gate oxide overdrive problem, the feedback control loop with two source followers and the single stage differential amplifier are used. The proposed design is implemented using a typical 0.25 μm 1P3M 60V BCD process. The sensing current...
Spinal diseases and spine curvature disorders often need swimming rehabilitation to recover as much as function as possible. During swimming sessions the trainer is able of discriminating by sight large movement problems connected to the back pain, but an automatic intelligent system capable to assess the presence of movement problems could help the swimmer doing therapy by him/herself. This paper...
In this paper, an automated battery test bench is proposed. The proposed bench consists of circuit breaker unit, uninterruptible power supply unit, system load unit, twelve battery research channels, distribution device, heat chamber, computerized control measuring device and communication device. The bench allows to perform thermal, resource and electrical tests of several lithium-ion batteries simultaneously...
Studies have shown that in places like New York City drivers often spend over 20 min looking for parking, contributing to as much as 30% of the total traffic. In response, cities like San Francisco have deployed systems capable of pointing drivers to the closest available parking spot. Unfortunately, such systems have gained little traction as they rely on specialized infrastructure that is expensive...
Contemporary water distribution networks exploit Internet of Things (IoT) technologies to monitor and control the behavior of water network assets. Smart meters/sensor and actuator nodes have been used to transfer information from the water network to data centers for further analysis. Due to the underground position of water assets, many water companies tend to deploy battery driven nodes which last...
Wireless Sensor Network (WSN) is composed of high density sensor nodes randomly deployed to monitor a specific phenomenon. Due to high density the data sensed by these nodes is highly redundant and spatially correlated. Sensor node is usually battery operated. Hence, power conservation takes on additional importance. Traditional deployment for WSN is self organizing neighboring discovery on randomly...
The recent development in Micro smart grid technology has improved energy efficiency and renewable energy utilization rate to serve local load with dispersed resources. We Propose a Hierarchical Household Load priority Load scheduling algorithm using cyber physical controller for Hybrid Energy Management in micro Smart Grids to maximize the utilization rate of the Renewable energy resources connected...
This work considers a system with two energy harvesting (EH) nodes transmitting to a common destination over a random access channel. The amount of harvested energy is assumed to be random and independent over time, but correlated among the nodes possibly with respect to their relative position. A threshold-based transmission policy is developed for the maximization of the expected aggregate network...
We study the probability of error optimization problem in collaborative spectrum sensing (CSS) with limited time and energy resources in energy harvesting cognitive radio (CR) networks. The frame structures for sensing and data transmission, if the spectrum is identified as vacant, are both supposed to be fixed. This implies that the time resource dedicated for CSS is limited and shared between spectrum...
A Linear Wireless Sensors Network (LSN) is a sensor network model used for monitoring linear structures such as oil, gas, and water pipelines. This type of network depends on the information sent from one node to another in a sequence. As a result, a failure or attack that occurs at any node may isolate some nodes from the network, which will affect the reliability of the entire network. In this situation,...
In this paper, the design and control of a new underwater glider having a high horizontal speed was studied. For this, the capacity of buoyancy engine which performs 2.5(knots) horizontal speed was designed. Especially, a controllable buoyancy engine to regulate the amount of buoyancy was designed and developed for control of the pitching angle of UG and the mass shifter carrying the battery was designed...
Enabling Energy Harvesting (EH) for Cognitive Radio Networks (CRNs) is promising to extend their lifetime. Since Secondary Users (SUs) can either access the spectrum or harvest energy, EH should be integrated within the context of Dynamic Spectrum Access (DSA), in order to increase both the energy efficiency and the spectrum efficiency. This paper proposes a novel algorithm that enables SUs to harvest...
We study a collaborative spectrum sensing (CSS) problem with limited time and energy resources in cognitive radio (CR) network. Time duration of sensing and data transmission, if the spectrum is identified as vacant, are both supposed to be fixed. This implies that the time resource dedicated for CSS is limited and shared between results reporting time (which depends on the number of sensing users)...
This paper describes a new class of autonomous marine vehicles named Medusa and highlights their role in a number of EU projects addressing multiple vehicle scenarios. The MEDUSA vehicles, with surface and diving versions, were designed and built at the Institute for Systems and Robotics, IST, Univ. de Lisboa, Portugal as a result of an effort aimed at affording researchers and practitioners of marine...
The last decade can be considered an embryonic period for seafloor networks with the introduction of sizeable networks off the West Coast of Canada, off the West Coast of the United States and in the Mediterranean Sea, as well as smaller networks spread throughout the world's oceans. The amount of data currently available is expected to pale in comparison to future prospects as the infrastructure...
In this paper, an automated battery test stand is proposed. The proposed stand consists of circuit breaker unit, uninterruptible power supply unit, system load unit, twelve battery research channels, distribution device, heat chamber, computerized control measuring device and communication device. The stand allows to perform thermal, resource and electrical tests of several lithium-ion batteries simultaneously...
The need to extend battery life in IoT devices, self-powered sensors and autonomous nodes increasingly highlights the necessity to reduce energy consumption as much as possible. One of the main issues to resolve is therefore the reduction of power consumption of electrical appliances while in "standby" that represents a significant amount of the total power dissipation. Today, despite the...
WSN is a network in which sensors are distributed randomly in space to keep track of any environmental or physical conditions. The uses of WSN is innumerable. Energy conservation and enhancing network lifetime are always been a challenging task. In this paper, to conserve energy and to maximize lifetime, FLC_1 and FLC_2 are used which dynamically regulates transmission power and sleep time. An IEEE...
This paper presents the design of the small-scale hand-launchable solar-powered AtlantikSolar UAV, summarizes flight results of a continuous 28-hour solar-powered flight that demonstrated AtlantikSolar's capability for energetically perpetual flight, and offers a model-based verification of flight performance and an outlook on the energetic margins that can be provided towards perpetual flight given...
High precision state of charge (SOC) estimation in battery packs is an integral and important part of battery management and maintenance in various applications ranging from smart grid battery energy storage systems to Electric and Hybrid Electric Vehicles (EV/HEV). In practice, measuring voltage of battery cells in a noisy environment will lead to erroneous SOC estimation, thus compromising the management...
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