This paper reports the design, optimization, and test results of a mechanical amplifier coupled to an electromagnetic energy harvester to generate power from lowamplitude (±1 mm) and low-frequency (<5 Hz) vibrations in the presence of large static displacements. When coupled to a translational kinetic energy harvester, the amplifier boosts small vibration amplitudes by as much as 4x while accom...

The winnowing machine of chili pepper harvesters was developed to reduce the potential problem low stem and fruit separation. combined with two impellers a center bearing prevent strain on drive shaft ensure durability. terminal velocity measured, an aerodynamic analysis conducted based this machine. A CFD (Computational Fluid Dynamics, Ansys Fluent 2020 R1) for three levels discharge port guid...

Vibrational energy harvesters can exhibit complex nonlinear behavior when exposed to external excitations. Depending on the number of stable equilibriums, are defined and analyzed. In this work, we focus bistable harvester with two wells. Though there have been earlier discussions such harvesters, all these works periodic Hence, focusing our analysis both quasiperiodic forced harvesters. Variou...

This paper reports a novel technique enabling to tune the resonant frequency of linear inertial piezoelectric energy harvesters through the control strategy of the associated electronic interface circuit. When associated with piezoelectric devices exhibiting high electromechanical coupling, it is expected to enable the variation of the resonant frequency in large proportions.

This paper reviews the state-of-art of the subthreshold level design energy harvesters for powering biomedical implants. Power consumption and lifespan are crucial requirements for the electronic circuitry of implantable systems. In order to meet these challenging requirements, a design for an energy harvester that operates in a subthreshold level offers a promising solution.

Post-harvest oil palm that does not comply with the Factory standart can cause losses in reducing production of fresh fruit bunches. The objectives this study are 1) To analyze he stages harvest and sources result risk harvesting FFB each post-harvest chain is traversed to TPH at Koperasi Petani Sawit Mandiri (KOPSA-M), Pangkalan Baru Village, Kampar Regency. 2) amount yield loss possible That ...

There can be a significant discrepancy between predicted and measured power conversion efficiency when using piezoelectric polymers for thermal energy harvesting. The influence of temperature and strain on electrical parameters can impact overall performances. We report the temperature and strain dependence of PVDF dielectric constant and losses and their impact on power conversion efficiency o...

Brazil nut, the Bertholletia excelsa seed, is one of the most important non-timber forest products in the Amazon Forest and the livelihoods of thousands of traditional Amazonian families depend on its commercialization. B. excelsa has been frequently cited as an indicator of anthropogenic forests and there is strong evidence that past human management has significantly contributed to its presen...