Nonlinear Multi-Frequency Converter Array for Vibration Energy Harvesting in Autonomous Sensors

Ferrari, Maurizio; Alghisi, Davide; Baù, Marco; Ferrari, Vittorio

doi:10.1016/j.proeng.2012.09.171

Cited by 18 publications

(14 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A nonlinear multi frequency converter array using four cantilever piezoelectric beams has also been fabricated and results show an increased operating range for array's with differently tuned resonators [48].…”

Section: Multimodal Arraysmentioning

confidence: 99%

A review on performance enhancement techniques for ambient vibration energy harvesters

Yildirim

Ghayesh

et al. 2017

Renewable and Sustainable Energy Reviews

218

View full text Add to dashboard Cite

show abstract

Section: Multimodal Arraysmentioning

confidence: 99%

A review on performance enhancement techniques for ambient vibration energy harvesters

Yildirim

Ghayesh

et al. 2017

Renewable and Sustainable Energy Reviews

218

View full text Add to dashboard Cite

show abstract

“…Beams are one of the major structures used widely in mechanical systems, such as energy harvesters [1], sensors [2] and the construction industry [3].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties Analysis of Bilayer Euler-Bernoulli Beams Based on Elasticity Theory

Zhang

2020

IJE

View full text Add to dashboard Cite

This paper analyzes the effects of structures and loads on the static bending and free vibration problems of bilayer beams. Based on static mechanical equilibrium and energy equilibrium, the static and dynamic governing equations of bilayer beam are established. It is found that the value of the thickness ratio has a significant effect on the static and dynamic responses of the beam, and the structure factors have their own critical value. When the value of the relative thickness is lower than its critical value or the length thickness ratio is greater than its critical value, the static and dynamic responses of the beam increase obviously. The results reveal that a critical value exists in bilayer beam, the value has noticeable influence on the mechanical properties of bilayer beams. Therefore, investigators should predict the critical structures accurately, when they design the bilayer beam.

show abstract

“…There are different techniques to address this problem, such as widening the bandwidth of the harvester and tuning the resonance frequency of a single generator periodically so that it matches the frequency of the ambient vibration. Bandwidth can be widened by designing the harvester to adjust its natural frequencies [13,14] and with devices having multiple oscillators [15][16][17]. Moreover, several studies [18][19][20][21][22][23][24] have considered nonlinear behavior to increase the power generation over a wider frequency range.…”

Section: Introductionmentioning

confidence: 99%

Design of a self-tunable, variable-length pendulum for harvesting energy from rotational motion

Hassan¹,

Osman²,

Khattab³

et al. 2020

J. vibroeng.

View full text Add to dashboard Cite

In this paper, a self-tunable energy harvester based on pendulum oscillations with a mechanical motion rectifier (MMR) system, which can convert vibration into electrical energy, is proposed. The harvester is composed of a pendulum excited by a slider-crank mechanism. The pendulum system is designed to automatically adjust its own natural frequency to match that of the imposed base excitation. Frequency adjustment in a proposed pendulum-type energy harvester is achieved by varying the length of the pendulum rod through changing the position of pendulum mass which mounted at its tip. The pendulum mass is driven by a ball screw through a stepper motor which controls the length of the pendulum automatically in accordance with the frequency of the external motion. The base motion frequency is detected by an infrared sensor. An ultrasonic distance sensor is used to detect the length of the pendulum rod and feeds this information to a microcontroller to obtain the corresponding natural frequency from a lookup table. The microcontroller calculates the frequency difference between natural frequency and excitation frequency and converts this value into a length difference through another lookup table. The microcontroller then gives instructions to drive a stepper motor through a sequence of steps to achieve the target length and keeps the device in resonance state to harvest maximum power during operation. Different time detection intervals were studied to investigate their effect on the tuning process. This study showed that the longer time intervals increase the detection accuracy for the calculation of low excitation frequency. The amount of energy consumed during the tuning process to adjust the pendulum length is presented. In this context, the consumed energy is only needed until the resonance of the device matches the excitation frequency. The harvester system was studied numerically and experimentally. Based on the findings of this work, the natural frequency of the harvester is successfully tuned below 0.7 Hz, when the length of pendulum rod is changed from 550 mm to 900 mm, generating power from 1.78 W to 4.1 W at an optimal load resistance value of 10 Ω and 3 Ω respectively at maximum excitation amplitude of 120 mm. Therefore, the proposed pendulum system can be used as an efficient harvester for producing power in low-frequency applications (< 1 Hz).

show abstract

Nonlinear Multi-Frequency Converter Array for Vibration Energy Harvesting in Autonomous Sensors

Cited by 18 publications

References 8 publications

A review on performance enhancement techniques for ambient vibration energy harvesters

A review on performance enhancement techniques for ambient vibration energy harvesters

Mechanical Properties Analysis of Bilayer Euler-Bernoulli Beams Based on Elasticity Theory

Design of a self-tunable, variable-length pendulum for harvesting energy from rotational motion

Contact Info

Product

Resources

About