Multi-mode array-type energy collection device with low-frequency and wide-frequency bands

Abstract

The invention discloses a multi-mode array-type energy collection device with low-frequency and wide-frequency bands. The multi-mode array-type energy collection device comprises a base and four piezoelectric energy recycling modules, wherein each piezoelectric energy recycling module is horizontally fixed on the base by an installation hole in the base and comprises a first L-shaped piezoelectriccantilever beam, a second L-shaped piezoelectric cantilever beam, a mass block, a piezoelectric material and an adaptive frequency modulation module, an intermediate insertion interface and an end insertion interface are formed in two side surfaces, perpendicular to an end surface of a base end, of a frequency modulation base, the intermediate insertion interface is arranged in a middle part of aside surface of the frequency modulation base, the end insertion interface is arranged in one side, far away from the base end, of the side surface of the frequency modulation base, the end insertioninterface is used for plugging the first L-shaped piezoelectric cantilever beam, and the intermediate insertion interface is used for plugging the second L-shaped piezoelectric cantilever beam. The multi-mode array-type energy collection device has the advantages of low-frequency vibration collection capability, wide-frequency band vibration collection capability, large energy output power and small volume.

Description

technical field [0001] The invention relates to the field of vibration energy recovery based on piezoelectric materials, and is suitable for providing functions to wireless sensor nodes or low-power electronic equipment, in particular to a low-frequency and wide-band multi-mode array energy harvesting device. Background technique [0002] With the development of wireless sensing technology and low-power electronic devices, it has become possible to use energy harvesting devices to collect energy from the environment to power wireless sensor nodes or low-power electronic devices. At present, among several existing energy recovery technologies, vibration energy recovery technology based on piezoelectric materials has the advantages of simple structure, high energy density, and easy integration, and has been widely studied and applied. The key technologies of piezoelectric energy harvesting mainly include broadband energy harvesting, low-frequency vibration harvesting capabilit...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the structure of the existing piezoelectric energy recovery device is not compact enough and the energy output is low, aiming at improving the performance of the piezoelectric energy recovery device in two aspects of low-frequency vibration energy recovery and broadband frequency response characteristics, a proposal is made A low-frequency and wide-band multi-mode array energy harvesting device, which can make the device simpler and more compact through a reasonable arrangement of the structure, and has the characteristics of high energy output power, etc.

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