Multistable energy capture device with linkage effect

Abstract

The invention discloses a multistable energy capture device with a linkage effect. The device comprises an energy capture device foundation bed, springs, an array energy capture device and an electricenergy storage and management system. An integral working principle is disclosed in a diagram 1, external vibrational excitation enables a piezoelectric cantilever beam to generate deformation, a direct piezoelectric effect is used, a piezoelectric plate converts vibration energy into electric energy, and then, the electric energy is conveyed to an electric energy storage and management system torealize a self-energy-supply sensor. The multistable energy capture device with the linkage effect has the following advantages that: (1) an array layout with different energy capture devices is adopted, each energy capture device has different inherent frequencies, and energy can be efficiently recovered in a large frequency range; and (2) the springs are adopted to connect the array energy capture devices, in addition, consistent acting force among magnets on an end part realizes the energy capture device linkage effect of the array, the whole device presents a multistable effect, and energy capture efficiency is improved. In addition, compared with a traditional multistable energy capture device based on an external magnet magnetic coupling effect, the device disclosed by the inventionhas a simple structural layout, miniaturization even microminiaturization can be realized, and electric energy is provided for the self-energy-supply sensor of the future Internet of Things era.

Description

technical field [0001] The invention is a multi-stable energy capture device with linkage effect, which mainly converts the vibration energy existing in the environment into electric energy, and then supplies energy to wireless sensors to realize self-powered sensors for environmental or structural health monitoring. Background technique [0002] With the development of microelectronic devices, low-power sensor technology has made great progress, and will develop in the direction of low power consumption and miniaturization in the future, laying the foundation for the rapid development of the Internet of Things. At present, sensors are mainly used for real-time health monitoring of the environment or structure, and realize data collection and transmission of sensor nodes. [0003] At present, the energy supply methods of sensors mainly include: wired power supply and battery power supply. However, the following problems are faced: limited space or environmental influence in...

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Problems solved by technology

However, the following problems are faced: limited space or environmental influence in a specific environment, difficulty in wire layout for wired power supply, and regular replacement of batteries for power supply, etc.

[0006] The above studies mainly focus on the multi-stable effects of single-degree-of-freedom systems, but there are few studies on multi-degree-of-freedom energy harvesters for linkage effects

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