A vibration energy harvester and its application

Abstract

The invention discloses a vibration energy collection device based on liquid metal, which comprises a hollow shell with openings at both ends, and the two ends of the hollow shell are respectively connected with a first cover and a second cover for covering the hollow shell; Between the first cover and the hollow shell and between the second cover and the hollow shell, triboelectric nanogenerator components are respectively arranged symmetrically, and the triboelectric nanogenerator components include electrodes and triboelectric materials arranged sequentially from outside to inside, and the liquid metal contained in the hollow shell; the electrodes are connected with wires for transmitting charges; the first cover and the second cover are provided with through holes for the wires to pass through. The vibration energy harvesting device provided by the present invention has good low-frequency response and wide operating frequency range, is suitable for multi-directional energy harvesting, and can be combined with various energy harvesting structures. and other fields have good application prospects.

Description

technical field [0001] The invention belongs to the technical field of vibration energy collection, and in particular relates to a liquid metal-based vibration energy collection device and its application. Background technique [0002] With the development of wireless sensor networks and microcomputer systems, microelectronic devices have made great progress in the direction of small size and low power consumption. However, traditional chemical batteries are limited to a certain extent due to their large size and limited life. and the development of microcomputer systems. In addition, many wireless sensor networks and microcomputer systems have a large number of nodes, and the working time of the entire network system depends on the battery reserve of a single node. In some complex environments, battery replacement and maintenance are more troublesome, which increases the cost. Therefore, if the energy in the environment can be collected, such as vibration energy, wind ene...

AI Technical Summary

Problems solved by technology

In response to the broadband characteristics of natural vibrations, many teams have proposed energy harvesters with bistable structures. However, when the external excitation amplitude is small, it is difficult for bistable energy harvesting devices to cross the potential barrier, so they can only operate in a single potential well with a small amplitude. Vibration, which reduces the efficiency of harvesting energy compared to linear energy harvesters

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