scholarly journals Investigation of an ultra-low frequency piezoelectric energy harvester with high frequency up-conversion factor caused by internal resonance mechanism

2022 ◽  
Vol 162 ◽  
pp. 108038
Author(s):  
Yipeng Wu ◽  
Sen Li ◽  
Kangqi Fan ◽  
Hongli Ji ◽  
Jinhao Qiu
Keyword(s):  
High Frequency ◽  
Internal Resonance ◽  
Energy Harvester ◽  
Conversion Factor ◽  
Low Frequency ◽  
Resonance Mechanism ◽  
Piezoelectric Energy

scholarly journals Piezoelectric Energy Harvesting with an Ultrasonic Vibration Source

Actuators ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 8
Author(s):  
Tao Li ◽  
Pooi Lee
Keyword(s):  
Energy Harvesting ◽  
High Power ◽  
High Frequency ◽  
Energy Harvester ◽  
Impedance Matching ◽  
Low Frequency ◽  
Vibration Source ◽  
Piezoelectric Energy ◽  
Power Ultrasonic ◽  
Ultrasonic Cutting

A piezoelectric energy harvester was developed in this paper. It is actuated by the vibration leakage from the nodal position of a high-power ultrasonic cutting transducer. The harvester was excited at a low displacement amplitude (0.73 µmpp). However, its operation frequency is quite high and reaches the ultrasonic range (24.4 kHz). Compared with another low frequency harvester (66 Hz), both theoretical and experimental results proved that the advantages of this high frequency harvester include (i) high current generation capability (up to 20 mApp compared to 1.3 mApp of the 66 Hz transducer) and (ii) low impedance matching resistance (500 Ω in contrast to 50 kΩ of the 66 Hz transducer). This energy harvester can be applied either in sensing, or vibration controlling, or simply energy harvesting in a high-power ultrasonic system.

scholarly journals Vibro-Shock Dynamics Analysis of a Tandem Low Frequency Resonator—High Frequency Piezoelectric Energy Harvester

Sensors ◽  
2017 ◽  
Vol 17 (5) ◽  
pp. 970 ◽  
Author(s):  
Darius Žižys ◽  
Rimvydas Gaidys ◽  
Vytautas Ostaševičius ◽  
Birutė Narijauskaitė
Keyword(s):  
High Frequency ◽  
Energy Harvester ◽  
Low Frequency ◽  
Dynamics Analysis ◽  
Piezoelectric Energy ◽  
Shock Dynamics

Linear and Non Linear Energy Harvesting From Bridge Vibrations

2016 ◽  
Author(s):  
Francesco Orfei ◽  
Helios Vocca ◽  
Luca Gammaitoni
Keyword(s):  
Time Series ◽  
Energy Harvesting ◽  
High Frequency ◽  
Energy Harvester ◽  
Low Frequency ◽  
Vibration Energy ◽  
Highway Bridge ◽  
Piezoelectric Energy ◽  
Non Linear ◽  
Bridge Vibrations

In this paper we analyze the performances of three different energy harvester configurations aimed at transforming vibration energy from a vehicle transited bridge. First of all we sampled the vibrations of a highway bridge in three different positions: at the entrance, in the middle and at the exit. Then, from the sampled time series, we reproduced the vibrations in the lab and tested the different harvesting configurations: low frequency linear piezoelectric energy harvester; high frequency linear piezoelectric energy harvester; non-linear bi-stable broadband piezoelectric energy harvester. The results are presented in terms of the RMS power converted. All the harvesters were built with the same piezoelectric material: composition and size were always the same.

scholarly journals A Multi-Mode Broadband Vibration Energy Harvester Composed of Symmetrically Distributed U-Shaped Cantilever Beams

Micromachines ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 203
Author(s):  
Xiaohua Huang ◽  
Cheng Zhang ◽  
Keren Dai
Keyword(s):  
Energy Harvester ◽  
Low Frequency ◽  
Experimental Results ◽  
Vibration Energy ◽  
Cantilever Beams ◽  
Resonant Frequencies ◽  
Promising Alternative ◽  
Piezoelectric Energy ◽  
Straight Beam ◽  
Resonance Frequencies

Using the piezoelectric effect to harvest energy from surrounding vibrations is a promising alternative solution for powering small electronic devices such as wireless sensors and portable devices. A conventional piezoelectric energy harvester (PEH) can only efficiently collect energy within a small range around the resonance frequency. To realize broadband vibration energy harvesting, the idea of multiple-degrees-of-freedom (DOF) PEH to realize multiple resonant frequencies within a certain range has been recently proposed and some preliminary research has validated its feasibility. Therefore, this paper proposed a multi-DOF wideband PEH based on the frequency interval shortening mechanism to realize five resonance frequencies close enough to each other. The PEH consists of five tip masses, two U-shaped cantilever beams and a straight beam, and tuning of the resonance frequencies is realized by specific parameter design. The electrical characteristics of the PEH are analyzed by simulation and experiment, validating that the PEH can effectively expand the operating bandwidth and collect vibration energy in the low frequency. Experimental results show that the PEH has five low-frequency resonant frequencies, which are 13, 15, 18, 21 and 24 Hz; under the action of 0.5 g acceleration, the maximum output power is 52.2, 49.4, 61.3, 39.2 and 32.1 μW, respectively. In view of the difference between the simulation and the experimental results, this paper conducted an error analysis and revealed that the material parameters and parasitic capacitance are important factors that affect the simulation results. Based on the analysis, the simulation is improved for better agreement with experiments.

Magnetic plucked meso-scale piezoelectric energy harvester for low-frequency rotational motion

2021 ◽  
Author(s):  
Chao-Ting Chen ◽  
Wei-Jiun Su ◽  
Wen-Jong Wu ◽  
dejan vasic ◽  
François Costa
Keyword(s):  
Rotational Motion ◽  
Energy Harvester ◽  
Low Frequency ◽  
Piezoelectric Energy ◽  
Meso Scale

Broadband Rotational Energy Harvesting Using Micro Energy Harvester

2018 ◽  
Author(s):  
Jui-Ta Chien ◽  
Yung-Hsing Fu ◽  
Chao-Ting Chen ◽  
Shun-Chiu Lin ◽  
Yi-Chung Shu ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Output Voltage ◽  
Energy Harvester ◽  
Low Frequency ◽  
Rotational Energy ◽  
Open Circuit ◽  
Maximum Output ◽  
Rotational Excitation ◽  
Rotating Speed ◽  
Piezoelectric Energy

This paper proposes a broadband rotational energy harvesting setup by using micro piezoelectric energy harvester (PEH). When driven in different rotating speed, the PEH can output relatively high power which exhibits the phenomenon of frequency up-conversion transforming the low frequency of rotation into the high frequency of resonant vibration. It aims to power self-powered devices used in the applications, like smart tires, smart bearings, and health monitoring sensors on rotational machines. Through the excitation of the rotary magnetic repulsion, the cantilever beam presents periodically damped oscillation. Under the rotational excitation, the maximum output voltage and power of PEH with optimal impedance is 28.2 Vpp and 663 μW, respectively. The output performance of the same energy harvester driven in ordinary vibrational based excitation is compared with rotational oscillation under open circuit condition. The maximum output voltage under 2.5g acceleration level of vibration is 27.54 Vpp while the peak output voltage of 36.5 Vpp in rotational excitation (in 265 rpm).

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