The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Self-adaptive systems are able to modify their behavior and/or structure to deal with their continuously changing environment and internal dynamics. MAPE control loops, based on these four steps: Monitoring, Analysis, Planning, and Execution, have been identified as crucial elements in realizing self-adaptation of software systems. Adaptive systems are generally more difficult to design, specify and...
In most Wireless Sensor Network deployments, the energy supply is a major challenge. Especially for nodes with high computational power or high bandwidth communication interfaces, the required size of batteries might increase to infeasible levels, even if the option of energy harvesting exists. For many use cases, some nodes are idling most of the time and transmitting only a few bytes from time to...
This paper presents a HV switch for the 13 series Li-ion battery cells. In order to operate at the large current of 1.0 A with the battery voltage of 46.68 V, the Differential Voltage Shaping Driver is employed to improve the slew rate of the driving voltage by 77.9%. Besides, the isolation is improved from −46.182 dB to −52.254 dB. The proposed design is implemented using a typical 0.25 um 1P3M 60V...
This paper presents the details of the development of an underwater camera for monitoring the habitats of red snow-crabs. Because the red snow crabs inhabit the deep waters in the east sea of South Korea, where the depth is approximately between 1,000 m and 1,800 m, and underwater camera that can endure high water pressures is required. Typically, most of the deep-sea cameras are attached to underwater...
Wireless sensor nodes which harvest energy from the environment have become an alternative to battery powered nodes. Requirements for efficient use of the extracted energy led to development of algorithms that manage the node functions depending on the amount of collected energy. This article introduces a novel solution of adaptively setting the duty-cycle of a wireless sensor node in order to maximize...
Three sensors, pH, dissolved CO2, and a CTD with a dissolved oxygen sensor were co-located on a submerged platform connected to a buoy platform in the Saanich Inlet close to Patricia Bay near Sidney, British Columbia. The sensors were moored at a depth of 23 metres for one year continuous sampling deployment to assess the ability of these sensors to monitor the edge of a dynamic, dissolved inorganic...
Wireless Sensor Networks (WSNs) technology is considered an excellent compromise for supporting monitoring applications on old trains operated by railway systems around the world. Although WSNs are optimized for energy management with regards to sensor nodes and communication protocols, their lifetimes remain limited by battery capacity. Deployment of new sensors or replacement of empty batteries...
Concrete is composed of sands, aggregates, cement and other fine powders that are dispersed in water to produce a chemical reaction, called hydration, responsible of the concrete hardening. The monitoring of the growth of compressive strength during hydration and its measurement at the end of the reaction is fundamental for evaluating the concrete quality. Currently the strength is measured in laboratory...
This paper proposes an algorithm that can maximize the total harvested energy of a single-inductor buck-boost converter operating with multiple input energy sources. It does so by dynamically adjusting the turn-on times and allocating the available time slots for the individual input sources in such a way that all the sources require equal turn-off times for the buck-boost converter to meet the zero-current...
Eboracum is an extensible modeling simulation framework for evaluation of reactive and adaptable wireless sensor networks (WSN), which provides high-level primitives for modeling platform and application aspects of WSNs. Combining application to environment-generated workload and computing/communication infrastructure, this framework allows to evaluate the efficiency of WSN configurations with regards...
The paper presents a laboratory Wind Turbine System (WTS) which is added to existing Hybrid Power System (HPS) along with other main components like Solar Panel, Battery System, Solar Charge controller and Inverter. The WTS is operated with a Motor along with integrated Frequency converter. The complete system is designed to be monitored and controlled over internet from remote location under the...
This paper presents a power reference modifier for seamless transfer considering the power balance in the parallel operation. When the PCS (Power Conditioning System) is disconnected from the grid, the PCS should operate in the stand-alone mode to supply energy to the critical loads. If multiple PCSs work as one PCS, slave PCSs maintain the current control mode even if master PCS change its control...
A novel data source selection algorithm is proposed for ambulatory activity tracking of elderly people. The algorithm introduces the concept of dynamic switching between the data collection modules (a smartwatch and a smartphone) to improve accuracy and battery life using contextual information. We show that by making offloading decisions as a function of activity, the proposed algorithm improves...
This paper presents a miniature light-weight closed-loop deep brain stimulation (DBS) device that delivers on-demand stimulation current pulses by monitoring and analysing local field potentials. The device includes monitoring and DBS units, each designed and fabricated on a separate small round circuit board. The closed-loop DBS device has been successfully validated by injecting a pre-recorded neural...
Effective detection of malware is of paramount importance for securing the next generation of smart devices. Static detection, the preferred technique used so far, is not sufficiently powerful to defeat state-of-the-art malware, and will be even less effective in the near future. Dynamic malware detection guarantees better protection since it operates at run-time and can identify also unknown malware,...
Battery management system has a very extensive application field. This paper introduces an online system which is available for monitoring electric current, voltage and temperature of power battery group simultaneously. This system adopts the microcontroller and PC as the main controllers, collects the information like voltage, current and temperature of the battery with battery information collection...
DC system has an important role in the operation of the substation. It is used for the operating of protection relays, control (DC 110V and 220V) and operating of Scadatel (DC 48V). During this time in Kentungan Substation, controlling and monitoring of the batteries are still done manually in a certain time period. This research is to design a system of Wireless Sensor Network to monitor the batteries...
In this paper describes the design, development and construction of a low power consumption sensor node for remote monitoring of the quality environment. The system was developed in the INICTEL-UNI, as part of the project "Telemetry system for monitoring natural resources and the environment in Peru". The sensor node is implemented with themethodology of development iterative and incremental...
This paper presents the design and implementation of an advanced Battery Management System (BMS). The basic concept is to divide each series battery array into sub-arrays where each battery is individually monitored and managed. The proposed BMS continuously monitors the voltage, current, and energy of each battery. Based on these measurements, the BMS can calculate individual State of Charge (SoC)...
Microgrids are generally comprised of a number of Distributed Energy Resources (DERs) which may be renewable or non-renewable sources. Due to the intermittent nature of wind and solar resources, batteries are commonly used to ensure power quality and reliability. A central Energy Management System (EMS) is necessary to coordinate operation for the most economical utilization of all microgrid resources...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.