Piezoelectric giant magnetostrictive combined wideband vibration energy collector

Abstract

The invention provides a piezoelectric giant magnetostrictive combined wideband vibration energy collector, belonging to the technical field of energy. The collector comprises a frame, a bistable beam, a cantilever beam and a permanent magnet, wherein two ends of the bistable beam are fixed on the frame; the permanent magnet is attached on the bistable beam; one end of the cantilever beam is fixed on the frame, and the other end thereof is arranged by means of suspension; and a positive wire magnetostrictive layer, a piezoelectric layer and a negative wire magnetostrictive layer are connected with each other in sequence. The collector adopts a bistable structure, realizes the conversation of magnetism, machine and electricity with the product characteristic of the magnetostrictive effect of a piezomagnetic phase and the piezoelectric effect of a piezoelectric phase in composite material, and leads an MEMS energy conversation component to be capable of obtaining a lager output power under the environment of low-frequency vibration. The collector not only has simple structure, easy manufacture and small volume, but also can run in the low-frequency environment, and can output larger stable power within the range of wider environment vibration frequency.

Description

technical field [0001] The invention relates to a device in the field of energy technology, in particular to a piezoelectric giant magnetostrictive composite broadband vibration energy harvester. Background technique [0002] In recent years, with the continuous advancement of wireless communication and MEMS (Micro-Flectro-Mechanical Systems) technology, the application range of micro-systems such as micro-electronic devices and micro-sensors has continued to expand, and has been widely used in civil, medical, Military and other fields. Since these devices are portable, they must have their own power supply. The performance and quality of the power supply is the key to most MEMS technology applications at present. The traditional electrochemical battery power supply method has disadvantages such as short life, frequent replacement and limited energy storage, and under certain conditions, the process of replacing the battery is complicated, the cost is high, or it is impossi...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose a piezoelectric giant magnetostrictive composite broadband vibration energy harvester, so that the transducer element can obtain a larger output power in a low-frequency vibration environment, so as to solve the traditional MEMS pressure problem. Problems such as narrow working frequency band, high natural frequency and low output power of electric energy harvester

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