A card size energy harvesting electric power sensor for implementing existing electric appliances into HEMS

Acoustic energy harvesting is one of many ways to harness acoustic noises as wasted energy into useful electical energy using an acoustic energy harvester. Acoustic energy harvester that tested by Dimastya (2018) which is consisted of loudspeaker and Helmholtz resonator, produced two-peak spectrum. It is suspected that the first peak is due to Helmholtz resonator resonance and the second peak comesfrom the resonance of the conversion loudspeaker. This research is to experimentally confirm the guess of the origin of the first peak. The experiments are performed by adding silencer materials on the resonator inner wall which are expected to be able to reduce the height of first peak and to know how they affect the output electric power spectrum of the acoustic energy harvester. Three different silencer materials are used, those are glasswool, acoustic foam, and styrofoam, with the same thickness of 12 cm. The results show that glasswool absorbs sound more effectively than acostic foam and styrofoam. The use of glasswool, acoustic foam, and styrofoam with 12 cm thickness lowered the first peak by 90% (from 39 mW to 0,5 mW), 82% (from 39 mW to 0,7 mW), and 82% (from 39 mW to 0,7 mW), respectively. Based on these results, it is concluded that the guess of the origin of the first peak is confirmed.

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Effect of Electromechanical Coupling on Locally Resonant Metastructures for Simultaneous Energy Harvesting and Vibration Attenuation Applications

Volume 2: Intelligent Transportation/Vehicles; Manufacturing; Mechatronics; Engine/After-Treatment Systems; Soft Actuators/Manipulators; Modeling/Validation; Motion/Vibration Control Applications; Multi-Agent/Networked Systems; Path Planning/Motion Control; Renewable/Smart Energy Systems; Security/Privacy of Cyber-Physical Systems; Sensors/Actuators; Tracking Control Systems; Unmanned Ground/Aerial Vehicles; Vehicle Dynamics, Estimation, Control; Vibration/Control Systems; Vibrations ◽

10.1115/dscc2020-3176 ◽

2020 ◽

Author(s):

Mohammad A. Bukhari ◽

Feng Qian ◽

Oumar R. Barry ◽

Lei Zuo

Keyword(s):

Wave Propagation ◽

Energy Harvesting ◽

Band Structure ◽

Electric Power ◽

External Load ◽

Electromechanical Coupling ◽

Effective Energy ◽

Coupling Coefficients ◽

Vibration Attenuation ◽

Load Resistor

Abstract The study of simultaneous energy harvesting and vibration attenuation has recently been the focus in many acoustic meta-materials investigations. The studies have reported the possibility of harvesting electric power using electromechanical coupling; however, the effect of the electromechanical resonator on the obtained bandgap’s boundaries has not been explored yet. In this paper, we investigate metamaterial coupled to electromechanical resonators to demonstrate the effect of electromechanical coupling on the wave propagation analytically and experimentally. The electromechanical resonator is shunted to an external load resistor to harvest energy. We derive the analytical dispersion curve of the system and show the band structure for different load resistors and electromechanical coupling coefficients. To verify the analytical dispersion relations, we also simulate the system numerically. Furthermore, experiment is carried out to validate the analytical observations. The obtained observations can guide designers in selecting electromechanical resonator parameters for effective energy harvesting from meta-materials.

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Design, Construction and Evaluation of an Energy Harvesting Prototype built with Piezoelectric Materials

Revista Facultad de Ingeniería Universidad de Antioquia ◽

10.17533/udea.redin.20200161 ◽

2020 ◽

Author(s):

Alejandra Echeverry Velasquez ◽

Mateo Velez Quintana ◽

Jose Alejandro Posada-Montoya ◽

José Alfredo Palacio-Fernandez

Keyword(s):

Power Generation ◽

Energy Harvesting ◽

Electric Power ◽

Energy Harvester ◽

Mechanical Load ◽

Piezoelectric Materials ◽

Storage System ◽

Energy Losses ◽

Cantilever Beams ◽

Design Construction

The piezoelectricity allows the generation of electric power taking advantage of the movement of vehicles and pedestrians. Many prototypes have been made with piezoelectric generators, but at present, their commercialization and use has not been popularized due to their low power generation and energy losses. A design of an experimental prototype of an energy harvester with piezoelectric materials that reduces these losses and generates more energy thanks to the resonance with the beams is proposed in this article. An equilateral triangular tilde is designed such it will not deform when a force act on it. The tilde has four-cantilever beams, and it is designed to resonate with the natural frequency of the piezoelectric material. This is coupled to the piezoelectric device. The vibration generated on the beam, by average of a mechanical load, is used to generate more energy when it resonates. The piezoelectric is a ceramic material and generates a nominal power of 75 mW before placing it on the beam, and 375 mW after being placed on the beam. However, the energy collection circuit has losses due to its own consumption, the transmission of energy to the storage system, and in the mechanical system.

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Review and prospect of optical electric-power sensor

10.1117/12.481960 ◽

2002 ◽

Author(s):

Changsheng Li ◽

Toshihiko T. Yoshino ◽

Xiang Cui

Keyword(s):

Electric Power ◽

Power Sensor

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Development of Electric Power Measurement for Energy Harvesting Using Unimorph-Type Piezoceramics

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.485.173 ◽

2011 ◽

Vol 485 ◽

pp. 173-176 ◽

Cited By ~ 1

Author(s):

Yoshikazu Shimura ◽

Petr Pulpan ◽

Ichiro Fujii ◽

Kouichi Nakashima ◽

Satoshi Wada

Keyword(s):

Energy Harvesting ◽

Electric Power ◽

Figure Of Merit ◽

Power Measurement ◽

Piezoelectric Energy Harvesting ◽

Material Constants ◽

Piezoelectric Energy ◽

Type Device ◽

Pulse Type ◽

Optimum Measurement

In this study, a new electric power generation measurement system was developed for piezoelectric energy harvesting using unimorph-type piezoceramics. Relationships between electric power and material constants such as d33, d31, g31, k31, e33T/e0, s11E, Qe and Qm were investigated using various lead zirconium titanate (Pb(Zr,Ti)O3, PZT) ceramics with different material constants. Using the equipment, pulse-type stress was applied to unimorph-type piezoceramics. Then, optimum measurement conditions were determined. Under these conditions, the electric power for piezoelectric energy harvesting was measured as a function of the material constants. Finally, it was clarified that for piezoelectric energy harvesting using a unimorph-type device, the figure of merit was combination of the 3 kinds of material constants such as large d31, small e33T/e0, and large s11E.

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