Oblique diagonal beam type three-way broadband piezoelectric vibration energy harvesting device

Abstract

The invention discloses a diagonal beam type three-way broadband piezoelectric vibration energy harvesting device which comprises a base and an energy harvesting mechanism, the energy harvesting mechanism is arranged at the top of the base, a mounting hole is formed in the middle of the top of the base, the energy harvesting mechanism comprises a transverse plate, a vertical plate, a piezoelectricbeam, a mass block, a first magnetic block and a second magnetic block, and the transverse plate is fixedly connected to the top of the base; the vertical plate is fixedly connected to the top of onesection of the transverse plate, the other end of the top of the transverse plate is movably connected with a cushion block, and the first magnetic block is fixedly connected to the top of one side of the vertical plate. Through cooperation of the transverse plate, the cushion block, a bolt, the vertical plate, the mass block, a piezoelectric plate, the first magnetic block, the piezoelectric beam and the second magnetic block, the bistable characteristic of the device is achieved, the collection frequency band is broadened, large and stable output power under vibration of different frequencies is achieved, collection of three-way vibration energy in the environment is achieved, energy collection can be achieved for vibration in the X-axis direction, the Y-axis direction and the Z-axis direction, and therefore the energy collection efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of piezoelectric energy harvesting, in particular to a diagonal beam type three-directional broadband piezoelectric vibration energy harvesting device. Background technique [0002] In recent years, with the intensification of global warming and the shortage of non-renewable resources such as oil, coal, and natural gas, seeking renewable and sustainable green energy has become an important challenge for the sustainable development of human civilization; using the positive pressure of piezoelectric materials Electric effect, the device that captures energy from the environment is called a piezoelectric energy harvester. Compared with electrostatic and electromagnetic types that convert vibration mechanical energy into electrical energy, piezoelectric energy harvesters have high energy capture efficiency, high energy density, and work Reliable, adaptable, non-polluting, low cost and other outstanding advantage...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a diagonal beam type three-directional broadband piezoelectric vibration energy harvesting device, which has good vibration sensitivity, and the device has good dual The bistable collection performance of the degree of freedom produces a wide energy collection frequency band, which can realize the efficient collection of three-way vibration energy in the environment. At the same time, due to the instability of the diagonal structure, the device's response to low amplitude is increased capacity, increase the use of micro-vibration energy, and the device has a simple structure and is easy to produce, which solves the problem that the existing vibration energy harvester structure has a narrow energy collection frequency band in the monostable state, and the existing vibration energy harvesting device The problem that energy harvesting for three-way vibration cannot be realized

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