Sectional type bicrystal piezoelectric-electromagnetic composite energy harvester

Abstract

The invention discloses a sectional type bicrystal piezoelectric electromagnetic composite energy harvester, belongs to the technical field of vibration energy harvesting, and aims to solve a problemthat when a cantilever beam of a traditional piezoelectric electromagnetic energy harvester is subjected to second-order bending vibration, charges of a piezoelectric plate on one side of the cantilever beam are counteracted; and a suspended magnet adopts a linear bearing to limit a motion trail, so that the output of the piezoelectric electromagnetic energy harvester is more stable and efficient.One end of a horizontal piezoelectric cantilever beam is connected with a left stand column of a fixed supporting base through a connecting plate, the upper surface and the lower surface of the otherend of the horizontal piezoelectric cantilever beam are connected with magnets respectively, and the lower surface of an upper cross beam and the upper surface of a lower cross beam of a right standcolumn of the fixed supporting base are connected with a magnet and a coil assembly respectively. And a magnet is suspended in each of the two coil assemblies. The sectional type bicrystal piezoelectric electromagnetic composite energy harvester has the advantages that the structure is novel, the design is flexible, a method for attaching piezoelectric patches to second-order bending vibration nodes on the upper surface and the lower surface of the horizontal piezoelectric cantilever beam in a sectional mode is provided, and the energy harvesting efficiency and performance are improved.

Description

[0001] Technical field [0002] The invention relates to a piezoelectric-electromagnetic composite energy harvester, in particular to a segmented twin-crystal piezoelectric-electromagnetic composite energy harvester, which belongs to the technical field of vibration energy harvesting. Background technique [0003] At present, the rapid development of portable electronic equipment, micro-electromechanical systems (MEMS) and wireless communication technologies has led to increasingly stringent technical requirements for microelectronic products. The vast majority of microelectronic products use traditional batteries to supply power. Due to the defects that traditional batteries need to be replaced or recharged regularly, their use in battlefields or in space is restricted. [0004] Vibration energy capture is a technology that converts vibration mechanical energy in the environment into electrical energy that meets the needs of microsystems. According to different energy convers...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a segmented dual-crystal piezoelectric-electromagnetic composite energy harvester to solve the problem of charge offset on the piezoelectric sheet on one side of the cantilever beam when the traditional piezoelectric-electromagnetic energy harvester is in the second-order bending vibration of the cantilever beam. problem, and the magnet suspended in the electromagnetic energy harvesting part uses linear bearings to limit its motion trajectory, making its output more stable and efficient

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