Hongping Hu

TL;DR: In this article, the axial preloading of a piezoelectric bimorph vibrating in the flexural mode was studied for a power harvester to effectively scavenge energy from ambient mechanical vibrations/noise with varying frequency spectra.

TL;DR: Numerical results show that the introduction of adc-dc converter in the storage circuit or a SSHI in the harvesting structure can raise the charging efficiency several times higher than a harvester without a dc- dc converter or an SSHI.

TL;DR: In this paper, a spiral-shaped bimorph power harvester operating with coupled flexural and extensional vibration modes for applications to low frequency energy sources is proposed, and a theoretical analysis is performed and the computational results show that the spiral structure has relatively low operating frequency compared to beam power harveters of the same size.

TL;DR: It was found that the introduction of a DDC in the modulating circuit and an SSHI in the harvesting structure can raise the charging efficiency by several times, which implies that more mechanical energy will be converted into an electric one.

TL;DR: A system to wirelessly convey electric energy through a thin metal wall is proposed in the paper, where 2 piezoelectric transducers are used to realize energy transformation between electric and mechanical, and a rechargeable battery is employed to store the transmitted energy.