The Automatic Winding Device of a Mechanical Watch Movement and Its Application in Energy Harvesting

2009 ◽  
Vol 131 (7) ◽  
Author(s):  
Longhan Xie ◽  
Carmen G. Menet ◽  
Ho Ching ◽  
Ruxu Du
Keyword(s):  
Energy Harvesting ◽  
Electronic Devices ◽  
Body Movements ◽  
Pendulum Model ◽  
Kinematical Model ◽  
Simulation Results ◽  
Energy Harvesting Devices ◽  
Unidirectional Motion

Invented more than 200 years ago, the automatic winding device of mechanical watch movement is one of the most successful energy harvesting devices. It harvests the kinematical energy from body movements and drives the mechanical watch movement. According to literatures, however, few have studied its kinematics in detail. In this paper, the kinematical model of automatic winding device is developed. The model is a pendulum model with a set of gears that converts the bidirectional motion to unidirectional motion. The simulation shows that the efficiency of the device is about 46.3%. Experiment validations are also conducted, which confirm the simulation results. With some modifications, it can be used to drive various mobile electronic devices.

Magnetoelectric Alternator

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
R. V. Petrov ◽  
N. A. Kolesnikov ◽  
M. I. Bichurin
Keyword(s):  
Energy Harvesting ◽  
Magnetoelectric Effect ◽  
Electronic Devices ◽  
Synchronous Generator ◽  
Resonant Mode ◽  
Practical Application ◽  
Variable Voltage ◽  
Power Generation Equipment ◽  
High Power Consumption ◽  
Energy Harvesting Devices

AbstractThe article is devoted to researching the practical application of the magnetoelectric effect for the development of energy harvesting devices, in particular for the design of magnetoelectric synchronous generator. The energy harvesting devices are designed to provide by the energy of remote or nonvolatile electronic devices that don’t require the high power consumption. General dimensions of the generator were as follows: diameter of 12 cm, thickness of 2.4 cm. The model of generator comprising eight ME elements with dimensions of one element of 40×10×0.5 mm at the frequency of the alternating magnetic field of 38 Hz provides the output constant voltage of 1.12 V and current of 3.82 microamps. Variable voltage before the rectifier was of 1.7 V. Total generated power was of 4.28 µW. The studies of resonant and non-resonant mode of ME element were carried out. Resonance mode of ME element provides a much greater output power. Designed generator can be applied in the construction of wind power sets, hydrogenerators, turbogenerators and other power generation equipment.

Recycling Piezo-Crystal Based Sounders from Small (Electronic) Devices into Energy Harvesting Devices

2013 ◽  
Vol 824 ◽  
pp. 138-144
Author(s):  
M.O. Afolayan ◽  
T.J. Inalegwu
Keyword(s):  
Energy Harvesting ◽  
Resonance Frequency ◽  
No Value ◽  
Human Subjects ◽  
Electronic Devices ◽  
At Resonance ◽  
Sound Feedback ◽  
Energy Harvesting Devices ◽  
Potential Use

Many small devices now incorporate a sound feedback device using piezo crystal plates of varying sizes (10mm-20mm diameter). After these devices are discarded, the piezo crystal plates are usually of no value other than a curious toy or component. This work presents a potential use of this device (18.8mm diameter unimorph PZT 5H piezo plate) for harvesting energy by mounting it on the wrist (at the base of meta carpal) of human subjects. The subjects were made to walk at an average steady pace of 0.7m/s. The device generated voltage in the range of 180.4mV to 1674.60mV. ANSYS 10 simulation shows that the optimum voltage will be generated at resonance frequency of approximately 204Hz.

Novel printing techniques to print flexible radio frequency devices such as antennas

Impact ◽  
2021 ◽  
Vol 2021 (1) ◽  
pp. 6-8
Author(s):  
Simon George King ◽  
Bilal Tariq Malik ◽  
Pavlos Giannak ◽  
Maxim Shkunov
Keyword(s):  
Energy Harvesting ◽  
Radio Frequency ◽  
Electronic Devices ◽  
Solar Panels ◽  
Power Sources ◽  
Wind Generators ◽  
Smart Surfaces ◽  
Energy Harvesting Devices ◽  
Printing Techniques ◽  
Flexible Radio

Energy harvesting devices such as solar panels and wind generators collect energy sources and convert them to generate power. Such devices are economical and efficient and also allow energy to be generated and devices and applications powered in places without conventional power sources, such as underwater. Energy harvesting also has the potential to be used to satisfy the need for energy autonomy that autonomous electronics, the Internet of Things (IoT) and wearable devices demand. At the University of Surrey, UK, Dr Simon King is collaborating with Dr Bilal Malik, Dr Maxim Shkunov and Dr Pavlos Giannakou on a project called flexible smart SURFaces for Augmented indoor communicationS (SURFAS) to design energy harvesting surfaces (antennas) for zero-power consuming electronic devices. Each team member has their own speciality and all share the common goal of revolutioning the ways that devices access and consume energy. The goal is to reduce energy consumption and provide cost benefits. Part of the team's current work involves the use of novel printing techniques to fabricate flexible radio frequency (RF) devices, such as rectifying antennas. The team believes the development of fully integrated printed energy harvesting devices will lead to countless future IoT applications. The ultimate objective of SURFAS is to enable zero-power consumption electronic devices and smart surfaces that are capable of optimally redirecting Wi-Fi signals and enhancing the performance of receivers. The team is also working to develop a manufacturing process for rapidly and cost-effectively producing such devices.

Vibrational Energy Harvesting Devices

2010 ◽  
Vol 2 (2) ◽  
pp. 80-92
Author(s):  
Rupesh Patel ◽  
Atanas A. Popov ◽  
Stewart McWilliam
Keyword(s):  
Energy Harvesting ◽  
Vibrational Energy ◽  
Energy Harvesting Devices ◽  
Vibrational Energy Harvesting

scholarly journals Piezoelectric property comparison of two-dimensional ZnO nanostructures for energy harvesting devices

RSC Advances ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 3363-3370
Author(s):  
Ang Yang ◽  
Yu Qiu ◽  
Dechao Yang ◽  
Kehong Lin ◽  
Shiying Guo
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Property ◽  
Piezoelectric Effect ◽  
Theoretical Studies ◽  
Two Dimensional ◽  
Zno Nanostructures ◽  
Energy Harvesting Devices ◽  
Experimental And Theoretical Studies

In this paper, experimental and theoretical studies of the piezoelectric effect of two-dimensional ZnO nanostructures, including straight nanosheets (SNSs) and curved nanosheets (CNSs) are conducted.

scholarly journals Enhanced Power Extraction with Sediment Microbial Fuel Cells by Anode Alternation

Fuels ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 168-178
Author(s):  
Marzia Quaglio ◽  
Daniyal Ahmed ◽  
Giulia Massaglia ◽  
Adriano Sacco ◽  
Valentina Margaria ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Energy Harvesting ◽  
Power Density ◽  
Microbial Fuel Cells ◽  
Average Power ◽  
Power Extraction ◽  
Harvesting Technique ◽  
Harvesting Method ◽  
Energy Harvesting Devices ◽  
Efficient Power

Sediment microbial fuel cells (SMFCs) are energy harvesting devices where the anode is buried inside marine sediment, while the cathode stays in an aerobic environment on the surface of the water. To apply this SCMFC as a power source, it is crucial to have an efficient power management system, leading to development of an effective energy harvesting technique suitable for such biological devices. In this work, we demonstrate an effective method to improve power extraction with SMFCs based on anodes alternation. We have altered the setup of a traditional SMFC to include two anodes working with the same cathode. This setup is compared with a traditional setup (control) and a setup that undergoes intermittent energy harvesting, establishing the improvement of energy collection using the anodes alternation technique. Control SMFC produced an average power density of 6.3 mW/m2 and SMFC operating intermittently produced 8.1 mW/m2. On the other hand, SMFC operating using the anodes alternation technique produced an average power density of 23.5 mW/m2. These results indicate the utility of the proposed anodes alternation method over both the control and intermittent energy harvesting techniques. The Anode Alternation can also be viewed as an advancement of the intermittent energy harvesting method.

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