A Piezomagnetic/Piezoelectric Broadband Vibration Energy Harvester Using Rotating Pendulum Structure

Abstract

The invention discloses a piezomagnetic / piezoelectric broadband vibration energy collector adopting a rotary pendulum type structure. The energy collector is characterized in that a door type frame is designed, a hole is arranged at the upper end of a left supporting plate (8) of the frame, a bearing (6) is mounted in the hole, a cantilever beam (7) is mounted in the bearing, one extended-out end of the cantilever beam sequentially penetrates into a sway hole of a rotary type eccentric pendulum (4) and then is fixedly connected with a piezomagnetic / piezoelectric energy converter (1), the piezomagnetic / piezoelectric energy converter is embedded in an air gap formed by a pair of permanent magnets (2), an armature (3) connected with the permanent magnets is fixed on a right supporting plate (5), or one extended-out end of the cantilever beam (7) supported by the bearing is connected with a fixing plate (12) of the pair of the permanent magnets (2), the piezomagnetic / piezoelectric energy converter is embedded in an air gap formed by the permanent magnets (2), and a central shaft of the piezomagnetic / piezoelectric energy converter is fixed on the left supporting plate (8) of the door type frame.

Description

technical field [0001] The invention relates to a device in the field of energy technology, in particular to a piezoelectric / piezoelectric broadband vibration energy collection device using a rotating pendulum structure. Background technique [0002] Vibration is a ubiquitous phenomenon in the environment. It is widely present in various production and living equipment such as bridges, buildings, ships, vehicles, machine tools, household appliances (refrigerators, washing machines, microwave ovens), and also in the blood flow of the human body, the heart, etc. In life processes such as beating and limb movement. If the vibration in the environment is converted into electrical energy, it will have a very broad application prospect for powering low-power devices such as wireless networks and embedded systems. [0003] The vibration in the environment is usually not a single frequency vibration, its frequency components are often distributed in a wide frequency band. In order...

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Problems solved by technology

This method can obtain a wider frequency band, but at each vibration frequency, only one beam resonates, and the output power of other non-resonant beams is negligible, so this method will increase the volume of the harvester and reduce the vibration energy harvester. The output power density of

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