Temat: power-harvesting - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: An energy harvesting circuit for self-powered sensors
Autorzy:: Fernandes, J. R.
Martins, M.
Piedade, M.
Goncalves, H.
Powiązania:: https://bibliotekanauki.pl/articles/398011.pdf
Data publikacji:: 2011
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:: prostownik dwupołówkowy
odzyskiwanie energii
power-harvesting
full-wave rectifier
Opis:: In this work we present a prototype circuit to harvest energy from radio waves or through magnetic coupling based on a stack of full-wave rectifiers with transistors working on sub-threshold region. This circuit will use as an input a field-to-voltage converter capable of outputting a 200mV waveform and is able to self-start without any other energy sources. The circuit presented here is a proof of concept energy-harvesting circuit powering a low frequency ring oscillator which acts as the load. The circuit is designed, simulated and tested in a standard CMOS process, AMS CMOS 0.35 μm.
Źródło:: International Journal of Microelectronics and Computer Science; 2011, 2, 1; 1-5
2080-8755
2353-9607
Pojawia się w:: International Journal of Microelectronics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Uzyskiwanie energii za pomocą materiałów piezoelektrycznych
Power harvesting with piezoelectric materials
Autorzy:: Zasada, K.
Krawczuk, M.
Powiązania:: https://bibliotekanauki.pl/articles/157084.pdf
Data publikacji:: 2010
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: zjawisko piezoelektryczne
uzyskiwanie energii za pomocą piezoelektryków
PZT
PVDF
PMN-PT
piezoelectric
power harvesting
Opis:: W artykule przedstawiono metody uzyskiwania energii za pomocą materiałów piezoelektrycznych. Piezoelektryki są materiałami, które mogą przetwarzać energię pochodzącą z drgań otocznia na energię elektryczną, która jest magazynowana i użyta do zasilania urządzeń. W ostatnim czasie wzrosło zapotrzebowanie na urządzenia w skali mikro, dlatego też wygenerowanie energii pochodzącej z piezoelektryków może okazać się alternatywą dla tradycyjnych i konwencjonalnych urządzeń zasilających [1]. W artykule zaprezentowane zostały przykłady urządzeń do uzyskiwania energii za pomocą różnych typów materiałów piezoelektrycznych.
Purpose of this article is the presentation of potential application power harvesting by piezoelectric materials. Piezoelectric are materials, which transfer ambient vibration energy into electric one. Under the influence of elastic strain piezoelectric, the electric field is created in the material (simple piezoelectric effect). However, under the influence of the electric field piezoelectric's dimensions change (inverse piezoelectric effect). Thanks to these properties piezoelectric's were the focus of much research. Many attempts have been made using this type of funding, leading to the development of technologies: from the construction of various electromechanical generators after the surgical placement of piezoelectric materials in the flesh of animals. Last time many sources in micro scale become very popular because the generation of energy from piezoelectric can be conventional alternative for traditional energy sources. With this method we can get cheap and convenient source of energy. In the paper examples of devices, which are supplied by this kind of energy as well as types of piezoelectrics (PZT, PVDF and PMN-PT), materials used in described examples are presented.
Źródło:: Pomiary Automatyka Kontrola; 2010, R. 56, nr 5, 5; 445-449
0032-4140
Pojawia się w:: Pomiary Automatyka Kontrola
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Metody pozyskiwania energii dla autonomicznych bezprzewodowych sieci czujnikowych
Energy harvesting methods for autonomous wireless sensor networks
Autorzy:: Olszyna, J.
Winiecki, W.
Powiązania:: https://bibliotekanauki.pl/articles/154481.pdf
Data publikacji:: 2012
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: rozproszone systemy pomiarowe
autonomiczne bezprzewodowe sieci czujnikowe
pozyskiwanie energii
distributed measurement systems
autonomous wireless sensor networks
power harvesting
Opis:: W artykule przedstawiono metody pozyskiwania energii dla autonomicznych bezprzewodowych sieci czujnikowych. Pozyskiwanie energii w takich systemach odbywa się za pomocą dedykowanych układów, w niektórych przypadkach źródłem energii może być sam obiekt pomiarowy. Źródła energii odpowiednie dla ww. zastosowań możemy przyporządkować do jednej z kategorii: ruch i wibracje, różnica temperatur, promieniowanie świetlne i fale radiowe.
The paper presents energy harvesting methods suitable for autonomous wireless sensor networks. The average power demand of a typical sensor is between 20-100 žW [1]. In such systems energy is harvested via dedicated circuits. In some cases a measured object can be an energy source. Energy sources adequate for the abovementioned applications can be assigned to one of the categories: movement and vibration, temperature differences, light radiation, radio-frequency waves [1, 2, 3]. An analysis of available solutions in terms of power density or dimensions of power harvesting circuit is required for each energy source. Another important issue is the energy source power characteristic and whether it is controllable. If harvested energy is not stored (battery), a key parameter becomes the average power. In the paper we take a close look at energy harvesting approaches, along with the underlying physics and the power output. The achievable power ranges from 0,1 žW/cm2 to 15 mW/cm2 (depending on the size of the energy harvesting unit). The highest power can be achieved with photovoltaic cells under direct exposure to the sunlight.
Źródło:: Pomiary Automatyka Kontrola; 2012, R. 58, nr 10, 10; 837-839
0032-4140
Pojawia się w:: Pomiary Automatyka Kontrola
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

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

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Skocz do pozycji: 5.

Tytuł:: Energy harvesting shock absorber with linear generator and mechanical motion amplification
Autorzy:: Satpute, Nitin
Iwaniec, Marek
Narina, Ramesh
Satpute, Sarika
Powiązania:: https://bibliotekanauki.pl/articles/2146637.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:: motion amplification
electric power
energy harvesting
efficiency
numerical simulation
amplifikacja ruchu
energia elektryczna
harvesting energii
wydajność
symulacja numeryczna
Opis:: Energy harvesting shock absorbers can generate about 15-20 W of electric power for normal suspension velocities. However, higher weight, fail safe characteristics and space limitations have restricted development of regenerative shock absorbers to research prototypes. Power to weight ratio of regenerative shock absorbers can be improved by incorporating motion amplification. In the presented work, an innovative design of energy harvesting shock absorber has been presented that uses motion amplification for improving harvesting efficiency. Apart from improving electric power, the proposed solution is fail safe and can be easily incorporated in existing vehicles with only marginal change in suspension layout. Study includes detailed numerical analysis for vibration transmissibility to investigate comfort and safety. Further, a prototype has been fabricated and experimentation has been performed to compute electric power generated and comfort. Simulations have been performed on real size model with utilization of harvested electric power which indicates about 19% of overall harvesting efficiency.
Źródło:: Vibrations in Physical Systems; 2020, 31, 1; art. no. 2020104
0860-6897
Pojawia się w:: Vibrations in Physical Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Investigation of mechanical motion amplification for vibration energy harvesting
Autorzy:: Satpute, Nitin
Iwaniec, Marek
Narina, Ramesh
Satpute, Sarika
Powiązania:: https://bibliotekanauki.pl/articles/2146670.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:: motion amplification
electric power
energy harvesting
efficiency
numerical simulation
amplifikacja ruchu
energia elektryczna
harvesting energii
efektywność
symulacja numeryczna
Opis:: Vibration Energy Harvesting is being investigated for autonomous sensors and actuators that mainly utilize ambient and machine induced vibrations. Recently mechanical motion amplification is incorporated for improving power to weight ratio of vibration harvesters. The present study is motivated to investigate mechanical motion amplification characteristics with different configurations. The parameters investigated are motion amplification ratio, force transmissibility characteristics, weight of the electrical generator, effective damping coefficient achieved and linear nature of damping. Numerical analysis has been performed to compare important characteristics of device operating without amplification to that of with amplification with different configuration. The study has been concluded with comments on application of suitable type of amplification mechanism depending on weight/space constraints and desired effective damping coefficient.
Źródło:: Vibrations in Physical Systems; 2022, 33, 1; art. no. 2022113
0860-6897
Pojawia się w:: Vibrations in Physical Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Estimation and Compensation of IQ Imbalance in SWIPT System
Autorzy:: Nair, Ajin R.
Kirthiga, S.
Jayakumar, M.
Powiązania:: https://bibliotekanauki.pl/articles/2055272.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: SWIPT
power splitting
iq imbalance
energy harvesting
hardware impairments
blind compensation
Opis:: Although there are many articulations of SWIPT architecture implementations, the hardware impairment aspect involved in the SWIPT architecture system is not given much attention. This paper evaluates the performance of SWIPT PS Receiver architecture in the presence of IQ imbalance hardware impairment with 16-QAM transmitter and AWGN channel. The parameters SNR, BER is evaluated in the presence of amplitude, phase imbalance, and PS factor at the SWIPT receiver side. Further, the IQ imbalance is estimated and compensated using a blind compensation algorithm. The system achieved a maximum BER of 10−7 in the presence of amplitude and phase imbalance of 0.2 and 1.6 respectively.
Źródło:: International Journal of Electronics and Telecommunications; 2021, 67, 4; 679--684
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Energy harvester based on Terfenol-D for low power devices
Autorzy:: Mech, R.
Kaleta, J.
Lewandowski, D.
Wiewiórski, P.
Powiązania:: https://bibliotekanauki.pl/articles/1190061.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: pozyskiwanie energii
mikrokontroler
materiał inteligentny
harvesting energy
low-power microcontroller
smart material
Opis:: Rising requirements for a new constructions, force engineers to monitor them all day long. An attractive solution seems to be applications of wireless sensors. However, there is a barrier limiting their application, which is the need to supply them with an electrical power over extended period of time without using additional wiring or batteries. The potential solution of this problem seems to be an energy harvesting. This paper proposes a new energy harvesting device based on magnetostrictive material. In the course of the experiments with using Terfenol-D rods as actuators and sensors it has been shown, that the mechanical impact to the magnetic core based on Terfenol-D rod, NdFeB permanent magnets and coil set allowed to obtain an electric power signal enough to supply device of 100 Ohm load on their active state.
Źródło:: Interdisciplinary Journal of Engineering Sciences; 2014, 2, 1; 8--12
2300-5874
Pojawia się w:: Interdisciplinary Journal of Engineering Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: An Experimental Investigation into Improving the Performance of Thermoelectric Generators
Autorzy:: Alahmer, Ali
Khalid, Mohammad Bani
Beithou, Nabil
Borowski, Gabriel
Alsaqoor, Sameh
Alhendi, H.
Powiązania:: https://bibliotekanauki.pl/articles/2068454.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: thermoelectric generator
liquid evaporation
TEG performance
enhancing power generation
waste energy harvesting
Opis:: Low-temperature heat sources have become increasingly popular in recent years, particularly for energy generation. The majority of thermal devices in the market (including devices using solar energy, geothermal energy, waste energy, and so on) transform heat into electricity indirectly, requiring mechanical work before producing power. Through the Seebeck effect, the technology that employs a thermoelectric generator (TEG) may directly transform heat energy into electricity. The TEG technology provides several advantages, including compactness, quietness, and the absence of moving components. TEGs have a low thermal and electrical efficiency, which is one of their main drawbacks. Therefore, the performance of a thermoelectric generator is improved by employing liquid evaporation heat transfer in this manuscript. The performance of the thermoelectric was examined experimentally and compared to the liquid evaporation mode under varied heat flux values and different modes of heat transfer in terms of free and forced convection with and without fins. The experimental results revealed that when compared to free convection without fins, adopting forced liquid evaporation convection would improve TEG voltage variation by 435.9%.
Źródło:: Journal of Ecological Engineering; 2022, 23, 3; 100--108
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Evaluation of the energy harvestable from an airless tire equipped with piezoelectric bimorphs on the lamellar spokes
Autorzy:: Suciu, C. V.
Koyanagi, K.
Powiązania:: https://bibliotekanauki.pl/articles/307907.pdf
Data publikacji:: 2013
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: airless tire
bending and buckling
energy harvesting
generated electrical power
piezoelectric bimorph
spoke
Opis:: In this work, one evaluates the electrical power generated by an airless tire equipped with piezoelectric bimorphs on both lateral surfaces of the radially distributed lamellar spokes. Such sheet-like spokes are hinged both toward the wheel drum at the inner annular band, and toward the wheel tread at the outer annular band. Since the hinged spokes are able to transmit tension forces but unable to transmit compression forces, bending and buckling of the spokes occur in the region of contact between the tire and the road. Models for the rolling friction of the airless tire, for the bending and buckling deformation of the spokes, and for the electrical power generated by the airless tire are suggested. Variation of the curvature radii and bending deformations for the spokes in the region of contact with the road are illustrated for various values of the rolling friction coefficient and spoke length. Then, variation of the generated electrical power versus the length of contact is obtained for various travel speeds of the vehicle. One observes that the generated electrical power increases at augmentation of the rolling friction coefficient, spoke length and travel speed. Although the obtained electrical power for the proposed harvesting system is relatively modest, it is not depending on the road roughness, i.e. harvesting becomes possible even on smooth roads, such as highway surfaces.
Źródło:: Journal of Telecommunications and Information Technology; 2013, 4; 79-84
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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