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Wyświetlanie 1-15 z 92
Tytuł:
New technologies using renewable energy in road construction
Autorzy:
Sumorek, A.
Buczaj, M.
Powiązania:
https://bibliotekanauki.pl/articles/410956.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
energy harvesting
piezoelectric
road surface
Opis:
Energy harvesting consists in the processing and storage of energy which is normally dissipated to the ambient environment. This study presents two solutions using two methods of energy generation: conversion of solar energy into electricity on the road surface and energy recovery from road surface vibrations and displacements. The description of configuration of testing stand dedicated for road surface vibrations energy harvesting has been also included. Described testing stand will make it possible to verify the possibility of application of piezoelectric transducers in road pavement in terms of occurrence of damages and the value of generated energy.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2017, 6, 4; 83-91
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some features of the construction of autonomus diagnostic systems of wind turbine generators
Autorzy:
Gizkho, Yuri
Myslovych, Mykhailo V.
Zvaritch, Valerij M.
Ostapchuk, Ludwiga B.
Gutorova, M.
Powiązania:
https://bibliotekanauki.pl/articles/2195746.pdf
Data publikacji:
2021
Wydawca:
Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
Tematy:
wind generator
Energy Harvesting technology
vibration diagnosis
generator wiatrowy
technologia Energy Harvesting
diagnostyka drgań
Opis:
The work proposes the structure of a diagnostic system, which is used to ensure the functioning of autonomous measuring transducers placed on the diagnosed parts of wind turbine generators (WT). For this purpose, the Energy Harvesting (EN) technology was used, which is designed to provide power to electronic devices in autonomous vibration measurement systems. Energy Harvesting technology converts the mechanical energy of vibrations into electrical current.
Źródło:
Modern Engineering; 2021, 2; 17--19
2450-5501
Pojawia się w:
Modern Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy harvesting in a magnetopiezoelastic system driven by random excitations with uniform and Gaussian distributions
Pozyskiwanie energii w piezo-magnetycznym układzie sprężystym, pobudzanym siłą stochastyczną o rozkładzie jednorodnym i normalnym
Autorzy:
Litak, G.
Borowiec, M.
Friswell, M. I.
Adhikari, S.
Powiązania:
https://bibliotekanauki.pl/articles/279267.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
energy harvesting
piezoelectric transducer
random excitation
Opis:
A simple magneto-piezoelectric system excited by random forces modelled with a double well potential is considered. System responses for different realizations of noise with uniform and Gaussian distributions are compared. The results show negligible differences in the regions of small and high noise intensity. A more noticeable difference can be seen in the intermediate region of noise just below the transition from isolated single well oscillations to coupled double wells oscillations. Variations in the mechanical displacement in this transition region indicate that the transition between these types of behaviour is broader for a uniform noise excitation. Consequently, the system excited with Gaussian noise tends more clearly to one of the different solutions (i.e. motion in a single well or in both wells) while the uniform noise case demonstrates intermittency with multiple solutions.
W pracy analizowany jest prosty układ piezo-magnetyczny, pobudzany losowo z potencjałem o dwóch studniach. Porównywane są odpowiedzi układu przy różnej realizacji szumu, o rozkładzie jednorodnym i normalnym (Gaussowskim). Wyniki przedstawiają nieznaczne różnice w obszarach niskiej i wysokiej intensywności szumu. Bardziej zauważalną różnicę można dostrzec w obszarze pośrednim szumu, tuż poniżej przejścia z oscylacji w pojedynczej studni potencjału do oscylacji w dwóch sprzężonych studniach. Zmiany pracy układu w tym obszarze sygnalizują, że obszar przejść pomiędzy takimi typami rozwiązań jest szerszy przy pobudzaniu szumem o rozkładzie jednorodnym. Natomiast układ pobudzany szumem o rozkładzie normalnym wyraźniej wykazuje tendencje do pracy w zakresie jednego z typów rozwiązań. W rezultacie przy szumie Gaussowskim układ dąży do ruchu w obrębie tylko jednej lub dwóch studni potencjału, podczas gdy w obecności szumu jednorodnego, w zachowaniu układu pojawia się zjawisko intermitencji w realizacji dwóch rozwiązań.
Źródło:
Journal of Theoretical and Applied Mechanics; 2011, 49, 3; 757-764
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rotating orbits of pendulum in stochastic excitation
Autorzy:
Teh, S.-H.
Woo, K.-C.
Demrdash, H.
Powiązania:
https://bibliotekanauki.pl/articles/280676.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
parametric pendulum
stochastic excitation
energy harvesting
Opis:
A method to extract energy from an excitation which is stochastic in nature is presented. The experimental rig comprises a pendulum, and a vertical excitation is provided by a solenoid. The control input assumed in the form of a direct current motor, and another motor, used in reverse, acts as a generator. The stochastic excitation has been achieved by varying the time interval between switching the RLC circuit on and off according to a random distribution. Such non-linear vertical excitations act on an oscillatory system from which a pendulum is pivoted. The Pierson-Moskowitz spectrum has been chosen as the random distribution while an inverse transform technique has been used for generation of the random excitation signal in LabVIEW environment. Moreover, a bang-bang control algorithm has been implemented to facilitate rotational motion of the pendulum. Experimental observations have been made for various noise levels of vertical excitations, and their implication on energy generation has been discussed. A positive amount of energy has been extracted for a minimal amount of the control input.
Źródło:
Journal of Theoretical and Applied Mechanics; 2016, 54, 3; 717-730
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Linear matrix inequalities control driven for non-ideal power source energy harvesting
Autorzy:
Ferreira, D. C.
Chavarette, F. R.
Peruzzi, N. J.
Powiązania:
https://bibliotekanauki.pl/articles/281518.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
energy harvesting
efficiency
control
non-ideal excitation
Opis:
The dynamic model of a linear energy harvester excited by a non-ideal power source is coupled to a controller to maximum vibration adjustment. Numerical analysis is taken to evaluate the energy harvested keeping the vibration optimized for the maximum interaction to the energy source using linear matrix inequalities for control driven. The dimensionless power output, actuation power and net output power is determined. As a result, it is possible to verify that the total energy harvested via exogenous vibration using the proposed controller is increased up to 65 times when in comparison to the open loop system.
Źródło:
Journal of Theoretical and Applied Mechanics; 2015, 53, 3; 605-616
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Broadband concept of energy harvesting in beam vibrating systems for powering sensors
Autorzy:
Rysak, A
Müller, M.
Borowiec, M.
Zubrzycki, J.
Litak, G.
Godlewska-Lach, A
Wittstock, V.
Powiązania:
https://bibliotekanauki.pl/articles/957989.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
piezoceramic
energy harvesting
vibration
broadband effect
impacts
Opis:
Recent demand for powering small sensors for wireless health monitoring triggered activities in the field of small size efficient energy harvesting devices. We examine energy harvesting in an aluminium beam with a piezoceramic patch subjected to kinematic harmonic excitation and impacts. Due to a mechanical stopper applied, inducing a hardening effect in the spring characteristic of the beam resonator, we observed a broader frequency range for the fairly large power output. Impact nonlinearities caused sensitivity to initial conditions and appearance of multiple solutions. The occurrence of resonant solution associated with impacts increased efficiency of the energy harvesting process.
Źródło:
Advances in Science and Technology. Research Journal; 2014, 8, 23; 62-67
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Harvesting mechanical vibrations energy using nonlinear electromagnetic minigenerators - a survey of concepts and problems
Autorzy:
Kulik, M.
Jagieła, M.
Powiązania:
https://bibliotekanauki.pl/articles/376373.pdf
Data publikacji:
2017
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
energy harvesting
nonlinear resonance
bistability
electromagnetic induction
Opis:
The state of knowledge in the field of conversion of energy of mechanical vibrations into electrical energy using nonlinear electromagnetic generators is presented. The principle of operation of the considered converters is based on the Faraday law. The electromotive force is induced by the relative movement of the coil or permanent magnets under impact of externally applied vibrations. In order to diminish the disadvantages of conventional generators, namely the narrow frequency bandwidth, in recent years the nonlinear systems were introduced that exhibit the nonlinear resonance phenomenon. Broadening the frequency bandwidth, in which the power generated by the system is relatively high, is realized via introduction of nonlinear force into system kinematics. Designing such systems becomes a big challenge. Based on thorough survey of recent publications as well as on own expertise in the field, the work compares a few concepts of nonlinear electromechanical minigenerators in term of their functional characteristics and design problems. Sample calculations of frequency characteristics using time- and frequency-domain models are presented.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2017, 90; 347-358
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Survey of Energy Harvesting Systems for Wireless Sensor Networks in Environmental Monitoring
Autorzy:
Dziadak, B.
Makowski, Ł.
Michalski, A.
Powiązania:
https://bibliotekanauki.pl/articles/220866.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
environmental monitoring
wireless sensor networks
energy harvesting
Opis:
Wireless Sensor Networks (WSNs) have existed for many years and had assimilated many interesting innovations. Advances in electronics, radio transceivers, processes of IC manufacturing and development of algorithms for operation of such networks now enable creating energy-efficient devices that provide practical levels of performance and a sufficient number of features. Environmental monitoring is one of the areas in which WSNs can be successfully used. At the same time this is a field where devices must either bring their own power reservoir, such as a battery, or scavenge energy locally from some natural phenomena. Improving the efficiency of energy harvesting methods reduces complexity of WSN structures. This survey is based on practical examples from the real world and provides an overview of state-of-the-art methods and techniques that are used to create energyefficient WSNs with energy harvesting.
Źródło:
Metrology and Measurement Systems; 2016, 23, 4; 495-512
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of an energy harvesting MR damper-based vibration reduction system
Autorzy:
Sapiński, B.
Rosół, M.
Węgrzynowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/280877.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
MR damper
energy harvesting
vibration reduction system
control
Opis:
The paper deals with an MR damper-based vibration reduction system with energy harvesting capability. The main part of the system creates an MR damper and a power generator based on an electromagnetic transduction mechanism, which are integrated into a stand- -alone device (so called energy harvesting MR damper). The main objective of the work is to evaluate performance of the proposed vibration reduction system employed in a single DOF mechanical structure. The material outlines the design structure and characteristics of the energy harvesting MR damper, presents the vibration reduction system based on this damper and explores experimental testing of the system implemented in a single DOF mechanical structure. To demonstrate that the devised system is feasible, performance figures maps completed by experimental data are shown.
Źródło:
Journal of Theoretical and Applied Mechanics; 2016, 54, 2; 333-344
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ideal rectifier bridge converting the harvested energy of vibrations into electric energy to power an mr damper
Autorzy:
Sapiński, Bogdan
Jastrzębski, Łukasz
Kozieł, Arkadiusz
Powiązania:
https://bibliotekanauki.pl/articles/1837924.pdf
Data publikacji:
2020
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
energy harvesting
rectifier bridge
voltage
current
MR damper
Opis:
The newly developed ideal rectifier bridge equipped with four N-type MOSFETs and two rail-to-rail operational amplifiers is a part of a typical energy harvesting conditioning circuit responsible for the rectification stage in the system of converting the energy harvested from vibrations into electrical energy to power the MR damper. The only energy loss in the bridge is caused by the voltage loss in transistors’ channels. The first sections of the work summarises the structural design of the bridge, the simulation procedure under the RL load and by sine voltage inputs with predetermined frequency and amplitude range, and benchmarks the results against those obtained for the conventional bridge based on Schottky diodes. In the second section, the PCB prototype of the bridge is analysed, and measurement data are compiled. The third section reports on the laboratory testing of the developed bridge converting the harvested energy in an MR damper-based vibration reduction system.
Źródło:
Acta Mechanica et Automatica; 2020, 14, 4; 198-205
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hot Pressed K0.5Na0.5NbO3 Material for Piezoelectric Transformer for Energy Harvesting
Autorzy:
Kozielski, L.
Feliksik, K.
Wodecka-Duś, B.
Szalbot, D.
Tutu, S.
Powiązania:
https://bibliotekanauki.pl/articles/353060.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
energy harvesting
piezoelectric effect
piezoelectric transformer
piezoelectric properties
Opis:
An optimized method of vibration Energy Harvesting is based on a step-down transformer that regulates the power flow from the piezoelectric element to the desired electronic load. Taking into account parameters of the whole system, the “optimal” voltage gain the piezoelectric transformer can be determined where the harvested power is maximized for the actual level of mechanical excitation. Consequently the piezoelectric transformers can be used to boost up the conversion of mechanical strain into electrical power with considerable potential in Energy Harvesting applications. Nowadays however, the most important factor is usage of lead free material for its construction. Additional desired parameters of such ceramics include high value of piezoelectric coefficients, low dielectric losses and reasonable power density. This work for first time proposes a lead free K0.5Na0.5NbO3 (KNN) material implementation for stack type of piezoelectric transformer that is designed for load efficiency optimization of vibration energy harvester.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1275-1280
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental investigation on the piezoelectric energy harvester as a self-powered vibration sensor
Autorzy:
Grzybek, D.
Micek, P.
Powiązania:
https://bibliotekanauki.pl/articles/949300.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
piezoelectric energy harvesting
piezoelectric composite
wireless sensor
vibration
Opis:
The article presents an experimental study of a system consisting of a piezoelectric energy harvesting device, Graetz bridge rectifier, capacitor, voltage comparator and radio transmitter. In the presented experimental study, the recovered electrical energy is accumulated in the capacitor and is used to send signals by a radio transmitter. In the first part, the application of piezoelectric energy harvesting devices based on the cantilever beam in wireless monitoring systems is discussed. In the second part, the mathematical model of energy conversion in the piezoelectric energy harvesting devices is presented. In the third part, the characteristics obtained during laboratory research are presented.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 3; 687-699
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A simple and affordable powering circuit for IoT sensor nodes with energy harvesting
Autorzy:
Bouřa, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1849152.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
energy harvesting
energy management
Internet of Things
wireless sensor networks
Opis:
The paper presents a circuit structure that can be used for powering an IoT (Internet of Things) sensor node and that can use energy just from its surroundings. The main advantage of the presented solution is its very low cost that allows mass applicability e.g. in the IoT smart grids and ubiquitous sensors. It is intended for energy sources that can provide enough voltage but that can provide only low currents such as piezoelectric transducers or small photovoltaic panels (PV) under indoor light conditions. The circuit is able to accumulate energy in a capacitor until a certain level and then to pass it to the load. The presented circuit exhibits similar functionality to a commercially available EH300 energy harvester (EH). The paper compares electrical properties of the presented circuit and the EH300 device, their form factors and costs. The EH circuit’s performance is tested together with an LTC3531 buck-boost DC/DC converter which can provide constant voltage for the following electronics. The paper provides guidelines for selecting an optimal capacity of the storage capacitor. The functionality of the solution presented is demonstrated in a sensor node that periodically transmits measured data to the base station using just the power from the PV panel or the piezoelectric generator. The presented harvester and powering circuit are compact part of the sensor node’s electronics but they can be also realized as an external powering module to be added to existing solutions.
Źródło:
Metrology and Measurement Systems; 2020, 27, 4; 575-587
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetorheological self-powered vibration reduction system with current cut-off: experimental investigation
Autorzy:
Jastrzębski, Ł.
Sapiński, B.
Powiązania:
https://bibliotekanauki.pl/articles/386843.pdf
Data publikacji:
2018
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
MR damper
vibration
energy harvesting
current cut-off circuit
Opis:
The paper summarises the results of laboratory testing of an energy harvesting vibration reduction system based on a magnetorheological (MR) damper whose control circuit incorporates a battery of bipolar electrolytic capacitors (current cut-off circuit). It is designed to reduce the undesired effects in vibration reduction systems of this type, associated with the increasing amplitude of the sprung mass vibration under the excitation inputs whose frequency should exceed the resonance frequency of the entire system. Results have demonstrated that incorporating a current cut-off circuit results in a significant decrease of sprung mass vibration amplitudes when the frequency of acting excitation inputs is higher than the resonance frequency.
Źródło:
Acta Mechanica et Automatica; 2018, 12, 2; 96-100
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power Allocation for Energy-Harvesting-based Fading Cognitive Multiple Access Channels : with or without Successive Interference Cancellation
Autorzy:
Li, Q.
Xu, D.
Powiązania:
https://bibliotekanauki.pl/articles/963855.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cognitive radio
power allocation
multiple access channels
energy harvesting
Opis:
This paper considers a fading cognitive multiple access channel (CMAC), where multiple secondary users (SUs), who share the spectrum with a primary user (PU), transmit to a cognitive base station (CBS). A power station is assumed to harvest energy from the nature and then provide power to the SUs. We investigate the power allocation problems for such a CMAC to maximize the SU sum rate under the interference power constraint, the sum transmit power constraint and the peak transmit power constraint of each individual SU. In particular, two scenarios are considered: with successive interference cancellation (SIC) and without SIC. For the first scenario, the optimal power allocation algorithm is derived. For the second scenario, a heuristic algorithm is proposed. We show that the proposed algorithm with SIC outperforms the algorithm without SIC in terms of the SU sum rate, while the algorithm without SIC outperforms the algorithm with SIC in terms of the number of admitted SUs for a high sum transmit power limit and a low peak transmit power limit of each individual SU.
Źródło:
International Journal of Electronics and Telecommunications; 2017, 63, 1; 65-72
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 92

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