271 results found
Fu H, Yeatman E, 2018, Effective Piezoelectric Energy Harvesting Using Beam Plucking and a Synchronized Switch Harvesting Circuit, Smart Materials and Structures, ISSN: 0964-1726
Piezoelectric energy harvesting, as a way to convert kinetic energy into electricity for low-power electronics, has drawn great attention for the last decade. However, issues still remain, including narrow operating bandwidth and low harvesting capability. In this paper, beam plucking (frequency up-conversion) and a parallel synchronized switch harvesting on inductor (P-SSHI) circuit are integrated in a piezoelectric energy harvester to improve the energy harvesting capability over a wide operating bandwidth. A theoretical model for the plucked beam is established using a distributed-parameter method. In order to study the system dynamics, an equivalent circuit for the plucked beam is built to integrate with the P-SSHI circuit. System dynamics, including the input power, beam tip displacement and output power, are investigated for different driving frequencies and load resistance. The plucked beam provides a uniform and single-frequency vibration for the P-SSHI to generate reliable switching events for any low-frequency wideband vibration; the P-SSHI circuit exhibits an improved electrical damping ratio which is beneficial to alleviating the power fluctuation issue for plucked beams at high frequencies. An experimental validation was conducted, and a close match was obtained. Enhanced output power with low power fluctuation was obtained in the Plucked Beam and P-SSHI circuit (PBPS) configuration over a wide frequency bandwidth with constant load resistance.
Fu H, Yeatman EM, 2018, Rotational energy harvesting using bi-stability and frequency up-conversion for low-power sensing applications: Theoretical modelling and experimental validation, Mechanical Systems and Signal Processing, ISSN: 0888-3270
© 2018 Elsevier Ltd Kinetic energy harvesting has drawn great attention in the past decade, but low-frequency and broadband operation is still a big issue which impedes this technology to be widely deployed in low-power Internet of Things applications. In this paper, theoretical modelling and experimental validation of a rotational harvester with bi-stability and frequency up-conversion is presented for harnessing low-frequency kinetic energy with a wide bandwidth. Piezoelectric transduction was adopted to convert the rotational kinetic energy into electricity. Distributed-parameter modelling was employed for analyzing the electromechanical dynamics of the bistable piezoelectric beam. Bistable and frequency up-converting behaviours were considered in the theoretical model by introducing two external input magnetic forces. Different oscillating modes were analyzed, showing the variation of power generation capability under different modes, and the advantage of operating in the periodic double-well mode. From the potential well study, we got a conclusion that for the same input magnetic force, periodic double-well mode is capable of achieving a larger vibration amplitude compared to a harvester without bi-stability. Asymmetric potential well shapes were investigated. This asymmetric shape provides a way to stabilize the initiation position of the beam for each plucking cycle, and eventually to stabilized the output. Key design factors to control the oscillating modes were studied, providing a guideline for future design. An experimental study was conducted to verify the theoretical results. A close match was achieved. This bistable harvester demonstrated a significant improvement (up to 2×) compared to a harvester without bi-stability over a wide bandwidth (from 1 to 11 Hz) at low frequencies, when operating in the periodic double-well mode. This paper presents a detailed theoretical model and in-depth analysis of a bistable frequency up-converting harveste
Fu H, Yeatman EM, 2018, Comparison and Scaling Effects of Rotational Micro-Generators using Electromagnetic and Piezoelectric Transduction, Energy Technology, ISSN: 2194-4288
Allmen LV, Bailleul G, Becker T, et al., 2017, Aircraft Strain WSN Powered by Heat Storage Harvesting, IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, Vol: 64, Pages: 7284-7292, ISSN: 0278-0046
Fu H, Yeatman EM, 2017, A methodology for low-speed broadband rotational energy harvesting using piezoelectric transduction and frequency up-conversion, ENERGY, Vol: 125, Pages: 152-161, ISSN: 0360-5442
Fu H, Yeatman EM, 2017, BROADBAND ROTATIONAL ENERGY HARVESTING USING BISTABLE MECHANISM AND FREQUENCY UP-CONVERSION, 30th IEEE International Conference on Micro Electro Mechanical Systems (MEMS), Publisher: IEEE, Pages: 853-856, ISSN: 1084-6999
Gramling HM, Kiziroglou ME, Yeatman EM, 2017, Nanotechnology for Consumer Electronics, Nanoelectronics: Materials, Devices, Applications, Pages: 501-526, ISBN: 9783527800728
© 2017 Wiley-VCH Verlag GmbH & Co.KGaA. All rights reserved. Nanotechnology is already inherent in communication modules through the ubiquitous use of low cost, highly functional silicon integrated circuits. Motion processing units, portable biomedical sensors, and imaging sensors are discussed along with relevant nanotechnologies, both current and imminent. Nanotechnology-enhanced glucose sensors are expected in commercial glucose monitoring systems in the next few years. Nevertheless, advances in nanotechnology could soon play a significant role in the evolution of optical sensors for consumer electronics. Nanotechnology is expected to play a significant role in the technology evolution of organic light-emitting diode (OLED) devices. Nanotechnologies are of critical importance to the progress of liquid crystal displays (LCDs), electrophoretic, and electrochromic displays, all of whose operating principles fundamentally rely on nanoscaled structures. Nanotechnology is essential to the continuing advances in integrated electronics: increasing computational power, reducing device scale, and limiting energy consumption.
Kiziroglou ME, Becker T, Wright SW, et al., 2017, Three-Dimensional Printed Insulation For Dynamic Thermoelectric Harvesters With Encapsulated Phase Change Materials, IEEE Sensors Letters, Vol: 1, Pages: 1-4
Kiziroglou ME, Becker T, Yeatman EM, et al., 2017, Comparison of methods for static charge energy harvesting on aircraft, SPIE Conference on Smart Sensors, Actuators, and MEMS VIII, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X
Kiziroglou ME, Boyle DE, Wright SW, et al., 2017, Acoustic power delivery to pipeline monitoring wireless sensors, ULTRASONICS, Vol: 77, Pages: 54-60, ISSN: 0041-624X
© 2017 IEEE. This paper describes the system concept and initial results for end-to-end energy-autonomous sensor systems using unmanned aerial vehicles (drones) as agents for power delivery to and data gathering from sensing devices. Such systems may be particularly useful for delay tolerant monitoring scenarios, where sensing devices may be deployed in remote, harsh conditions, often with sparse connectivity, long life and high reliability requirements. This paper discusses the latest advances in wireless power delivery that makes this it possible to fly wireless power delivery systems on drones that have little payload capability.
Mitcheson PD, Boyle D, Kkelis G, et al., 2017, Energy-Autonomous Sensing Systems Using Drones, 16th IEEE SENSORS CONFERENCE, Publisher: IEEE, Pages: 648-650, ISSN: 1930-0395
Pillatsch P, Xiao BL, Shashoua N, et al., 2017, Degradation of bimorph piezoelectric bending beams in energy harvesting applications, SMART MATERIALS AND STRUCTURES, Vol: 26, ISSN: 0964-1726
Yeatman EM, Gramling HM, Wang EN, 2017, Introduction to the special topic on nanomanufacturing, MICROSYSTEMS & NANOENGINEERING, Vol: 3, ISSN: 2055-7434
Boyle D, Kolcun R, Yeatman E, 2016, Towards Precision Control in Constrained Wireless Cyber-Physical Systems, 2nd International Summit on Internet of Things - IoT Infrastructures( IoT 360), Publisher: SPRINGER INT PUBLISHING AG, Pages: 292-306, ISSN: 1867-8211
Boyle DE, Kiziroglou ME, Mitcheson PD, et al., 2016, Energy Provision and Storage for Pervasive Computing, IEEE PERVASIVE COMPUTING, Vol: 15, Pages: 28-35, ISSN: 1536-1268
Fu H, Cao K, Xu R, et al., 2016, Footstep Energy Harvesting Using Heel Strike-Induced Airflow for Human Activity Sensing, 13th IEEE International Conference on Wearable and Implantable Body Sensor Networks (BSN), Publisher: IEEE, Pages: 124-129, ISSN: 2376-8886
Fu H, D'Auria M, Dou G, et al., 2016, A DYNAMIC REGULATING MECHANISM FOR INCREASED AIRFLOW SPEED RANGE IN MICRO PIEZOELECTRIC TURBINES, 29th IEEE International Conference on Micro Electro Mechanical Systems (MEMS), Publisher: IEEE, Pages: 1220-1223, ISSN: 1084-6999
Fu H, Yeatman EM, 2016, Broadband Rotational Energy Harvesting with Non-linear Oscillator and Piezoelectric Transduction, 16th International Conference on Micro- and Nano-Technology for Power Generation and Energy Conversion Applications (PowerMEMS), Publisher: IOP PUBLISHING LTD, ISSN: 1742-6588
Goverdovsky V, Yates DC, Willerton M, et al., 2016, Modular Software-Defined Radio Testbed for Rapid Prototyping of Localization Algorithms, IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, Vol: 65, Pages: 1577-1584, ISSN: 0018-9456
Kang M, Yeatman EM, 2016, Thermal Energy Harvesting Using Pyroelectric and Piezoelectric Effect, 16th International Conference on Micro- and Nano-Technology for Power Generation and Energy Conversion Applications (PowerMEMS), Publisher: IOP PUBLISHING LTD, ISSN: 1742-6588
Kiziroglou ME, Becker T, Wright SW, et al., 2016, Thermoelectric Generator Design in Dynamic Thermoelectric Energy Harvesting, 16th International Conference on Micro- and Nano-Technology for Power Generation and Energy Conversion Applications (PowerMEMS), Publisher: IOP PUBLISHING LTD, ISSN: 1742-6588
Kiziroglou ME, Elefsiniotis A, Kokorakis N, et al., 2016, Scaling and super-cooling in heat storage harvesting devices, MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS, Vol: 22, Pages: 1905-1914, ISSN: 0946-7076
Pillatsch P, Yeatman EM, Holmes AS, et al., 2016, Wireless power transfer system for a human motion energy harvester, SENSORS AND ACTUATORS A-PHYSICAL, Vol: 244, Pages: 77-85, ISSN: 0924-4247
Pu SH, Darbyshire DA, Wright RV, et al., 2016, RF MEMS Zipping Varactor With High Quality Factor and Very Large Tuning Range, IEEE ELECTRON DEVICE LETTERS, Vol: 37, Pages: 1340-1343, ISSN: 0741-3106
Boyle D, Kolcun R, Yeatman E, 2015, DEVICES IN THE INTERNET OF THINGS, JOURNAL OF THE INSTITUTE OF TELECOMMUNICATIONS PROFESSIONALS, Vol: 9, Pages: 27-31, ISSN: 1755-9278
Boyle D, Kolcun R, Yeatman E, 2015, Devices in the internet of things, Journal of the Institute of Telecommunications Professionals, Vol: 9, Pages: 26-31, ISSN: 1755-9278
There are many potential applications in the utilities, critical infrastructure monitoring and control and environmental monitoring. This article charts the device-level technologies used in the creation the IoT, including hardware, software and communications. IoT's emergence coincided with the development of radio frequency identification (RFID) technology offering advantages such as the communicable range, ability to write data to a tag, and the possibility of reading multiple tags more efficiently with a single reader. RFID is now just one of many component IoT technologies. We have arrived at a situation where it is practically trivial to integrate computation and communication into any manufactured thing, and it is equally feasible to connect and technologically perceive natural things using communicable sensors. Furthermore, it is possible to react to, and control the environment using embedded computing devices coupled with actuators. Thorough comprehension of functional and non-functional requirements is necessary to develop an effective, efficient design specification for an IoT device. But given the large design space and complexity, there are numerous barriers to entry. As a result, many types of device have been adopted as practical de facto hardware development platforms across research communities, anc hacker and maker communities. In each case, intermediary 'operating systems', designed to simplify their programming by masking hardware complexity, are typically used. Their technical specifications are often not fully disclosed, but they do rely on well- defined standards to ensure the necessary interoperability. The majority of devices are characterised as single board computers. The final design for a market-ready product will likely be as efficient and cost-effective as possible in terms of design, but include sufficient redundancy to support software updates and potential shifts in standards. Since the early 2000s, the wireless sensor network comm
Briand D, Yeatman E, Roundy S, 2015, Introduction to Micro Energy Harvesting, ISBN: 9783527672943
© 2015 Wiley-VCH Verlag GmbH & Co. KGaA. All rights reserved. This introductory chapter provides an overview of the book Micro Energy Harvesting and its chapters. This book is intended to cover the engineering fundamentals and current state of the art associated with energy harvesting at the small scale, or micro energy harvesting. The term "energy harvesting" usually refers to devices or systems that capture (or harvest) ambient energy in the environment, and convert it into a useful form, which is usually electricity. Of the main types of energy harvesting for small-scale applications, solar (or photovoltaic (PV)) cells are the most mature and long established, with devices such as PV-powered pocket calculators having been available for over 30 years. The book covers fundamentals and devices for harvesting energy from vibrations, fluid flow, acoustics, heat, light, RF radiation, and chemicals. An emphasis is especially given on the topics of kinetic and thermal energy harvesting for which microscale technologies have been readily developed.
Briand D, Yeatman E, Roundy S, 2015, Micro Energy Harvesting, ISBN: 9783527672943
© 2015 Wiley-VCH Verlag GmbH & Co. KGaA. All rights reserved. With its inclusion of the fundamentals, systems and applications, this reference provides readers with the basics of micro energy conversion along with expert knowledge on system electronics and real-life microdevices. The authors address different aspects of energy harvesting at the micro scale with a focus on miniaturized and microfabricated devices. Along the way they provide an overview of the field by compiling knowledge on the design, materials development, device realization and aspects of system integration, covering emerging technologies, as well as applications in power management, energy storage, medicine and low-power system electronics. In addition, they survey the energy harvesting principles based on chemical, thermal, mechanical, as well as hybrid and nanotechnology approaches. In unparalleled detail this volume presents the complete picture -- and a peek into the future -- of micro-powered microsystems.
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