Vibration energy collecting device based on liquid metal and application thereof

Abstract

The invention discloses a vibration energy collection device based on liquid metal. The device comprises a hollow housing with two open ends, and the two ends of the hollow housing are respectively connected with a first cover body and a second cover body which are used for covering the hollow housing. Friction nano-generator assemblies are symmetrically arranged between the first cover body and the hollow shell and between the second cover body and the hollow shell respectively, and each friction nano-generator assembly comprises electrodes sequentially arranged from outside to inside, a friction electric material and liquid metal contained in the hollow shell. The electrodes are connected with wires for transmitting charges, and the first cover body and the second cover body are providedwith through holes through which wires pass. The vibration energy collecting device provided by the present invention is good in low-frequency response and wide in working frequency domain, is suitable for multi-direction energy collection, is capable of being combined with various energy collecting structures and has good application prospect in the fields of bistable structure vibration energycollectors, cantilever beam vibration energy collectors and the like.

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...

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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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