High-performance piezoelectric longitudinal vibration energy harvester

Abstract

The invention relates to a high-performance piezoelectric longitudinal vibration energy harvester, and belongs to the technical field of new energy. An outer barrel is arranged between check rings of a support platen and a cover plate through screws, and an inner barrel is pressed between counter bores of the support platen and the cover plate. An inertia block is formed by two mass blocks, a magnet ring and a nut jointly, sleeved with the inner barrel, and connected with the support platen through a spring. Two metal sheets with piezoelectric plates adhering to the arc convex sections of the metal sheets are riveted and then form piezoelectric vibrators, and energy converters are formed by the piezoelectric vibrators, wedge blocks and magnet blocks, wherein the wedge blocks and the magnet blocks are riveted to the two ends of each piezoelectric vibrator. The wedge blocks of the two energy converters are installed in dovetail grooves in the inner wall of the outer barrel, and guide posts of the magnet blocks are arranged in two radial through holes in the side wall of the inner barrel respectively. The magnet blocks are installed close to opposite magnetic poles of magnet rings. The high-performance piezoelectric longitudinal vibrating energy harvester has the advantages that the piezoelectric plates only bear pressure stress, the deformation direction of the piezoelectric vibrators is perpendicular to the vibrating direction, deformation is not directly related to the mass of the inertia block, and a two-freedom-degree system is formed by the energy converters and an inertia block-spring system, so that reliability is high, inherent frequency is low, and the effective frequency band is wide.

Description

technical field [0001] The invention belongs to the technical field of new energy, and specifically relates to a high-performance piezoelectric longitudinal vibration energy harvester, which is used for energy recovery of low-frequency, large-amplitude, and high-intensity longitudinal vibration. Background technique [0002] In order to meet the self-power supply requirements of micro-power electronic products and micro-miniature remote sensing and embedded monitoring systems, and to avoid the pollution of the environment by a large number of waste batteries, research on micro-miniature power generation devices based on the principles of electromagnetic, electrostatic, thermoelectric, capacitive and piezoelectric has been carried out. Become a frontier hotspot at home and abroad. All kinds of power generation devices have their own advantages and applicable fields. The advantages of piezoelectric vibration power generation devices are simple structure, easy manufacture, and ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the limitations of existing piezoelectric vibration power generation devices such as low reliability and poor adaptability to low-frequency environments, the present invention provides a high-performance piezoelectric longitudinal vibration energy harvester, which is used in conventional environments such as bumps in various vehicles and human movement. Low-frequency, large-amplitude, and high-intensity vibration energy recovery

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