A six-dimensional piezoelectric vibration energy harvester

Abstract

The invention relates to a six-dimensional piezoelectric vibration energy collector. The six-dimensional piezoelectric vibration energy collector comprises a substrate, a plurality of flexible beams, a plurality of supporting leg assemblies and an inertia mass block arranged above the substrate, wherein the flexible beams are distributed in a circumferential array, and the supporting legs and the flexible beams are arranged in a one-to-one correspondence manner; the roots of the flexible beams are fixedly connected onto the substrate so as to form a cantilever beam structure, the free ends of the flexible beams are fixedly connected with one end of each of the supporting leg assemblies, the other ends of the flexible beams are fixedly connected with the inertia mass block, and an included angle is formed between each supporting leg assembly and the flexible beam connected with the corresponding supporting leg assembly; each supporting leg assembly comprises a rigid connecting rod and two spherical pair flexible hinges connected at two ends of the rigid connecting rod respectively; and the upper surface and / or lower surface of each flexible beam are / is adhered with an energy conversion element. According to the six-dimensional piezoelectric vibration energy collector, the collection efficiency of vibration energy is improved, and the six-dimensional piezoelectric vibration energy collector can realize collection of vibration energy under multi-directional and composite linear vibration and angular vibration excitation conditions.

Description

technical field [0001] The invention relates to a vibration energy collection device, in particular to a six-dimensional piezoelectric vibration energy collector. Background technique [0002] Harvesting and harvesting energy from environmental energy provides long-term, continuous power supply for microelectronic devices and microsensors, which can eliminate the need for carrying power or transmitting data wires, in wireless sensor networks, implanted human health detection systems, environmental control Systems, military security application systems, wild animal tracking devices and other systems that are inconvenient to use and replace batteries will have broad application prospects and market demands. [0003] Most of the existing research on vibration energy harvesters is carried out for single-degree-of-freedom environmental vibration, and its sensitive direction is designed to be consistent with the direction of environmental vibration. When there is a direction error...

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Problems solved by technology

The disadvantages of this device are: due to the existence of rotating parts, the device is relatively complicated to manufacture, and it must meet the requirements of small friction on the rotating shaft; the metal ring and light rod will consume part of the energy in the process of adjusting the direction, and there is a large energy consumption. , The problem of low vibration energy collection efficiency; there is the problem that the direction adjustment response is not fast enough, and the vibration sensitivity to small external excitation levels is not high; there will be a dead point when vibrating in the direction perpendicular to the vibration of the light bar; there is a long-term Hours of work can lead to wear and tear on components

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