A low-frequency, multi-directional vibration energy harvesting device

Abstract

The invention provides a low-frequency and multi-direction vibration energy collection device. The low-frequency and multi-direction vibration energy collection device comprises a cavity, and liquid,a supporting column, a floating block, a lever, a rotating shaft, a transmission structure and an energy conversion device which are arranged in the cavity. The liquid covers an area between the bottom of the cavity and the floating block. One end of the support column is fixed to the bottom of the cavity in a matching manner, and the other end is fixed on the lever. One surface of the floating block floats on the surface of the liquid, and the other surface of the floating block is fixed to one end of the lever in a matching manner. The end, away from the floating block, of the lever is connected with the energy conversion device through the transmission structure. The end, away from the transmission structure, of the energy conversion device is fixed to the inner side wall of the cavity.When the device is excited by external vibration, the liquid shakes, the floating block drives the lever to swing up and down along with shaking of the liquid, and then the lever drives the energy conversion device to move through the transmission structure to generate electric energy. By means of the technical scheme, low-frequency and multi-direction vibration mechanical energy in the externalenvironment can be converted into electric energy through a single energy conversion device.

Description

technical field [0001] The invention relates to the field of energy conversion, in particular to a low-frequency, multi-directional vibration energy collection device. Background technique [0002] With the breakthrough of 5G technology and the development of the Internet of Things, a large number of wireless sensors will be deployed around the world in the near future to form a sensor network that connects everything to realize real-time monitoring and intercommunication in every corner of life and work. At present, the vast majority of sensors are powered by traditional batteries, and traditional batteries have problems such as short life, regular replacement, troublesome replacement, and environmental damage, which will increase the maintenance and recycling costs of wireless sensor networks, which will also restrict Further development of the Internet of Things. In order to solve the problems caused by using traditional batteries to power wireless sensors, researchers h...

AI Technical Summary

Problems solved by technology

However, in the actual application environment, the ubiquitous vibration excitation is multi-directional, and the traditional cantilever beam structure is difficult to play a role

To this end, researchers have proposed different new structures to achieve multi-directional vibration energy collection, one of which is to use energy conversion devices distributed in an array in space, each energy conversion device corresponds to a different angle, and then each The energy conversion device is connected to the energy management circuit; when the effective vibration direction of the energy conversion device in a certain position is close to the external excitation direction, the energy conversion device can play a role and realize the conversion of vibration mechanical energy into electrical energy; but other The effective vibration direction of the azimuth-arranged energy conversion device deviates far from the excitation direction, and basically does not play a role. At this time, each energy conversion device will appear in a different working state, and the energy conversion devices in these different working states are matched together. When in use, the design complexity of the energy management circuit will be greatly increased. Either choose to increase the number of energy management circuits to match each energy conversion device one by one, or improve the performance of the energy management circuit so that it can match different jobs at the same time. state of the energy conversion device, no matter which of the above methods will increase the complexity and manufacturing cost of the entire vibration energy harvesting device

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