Wind-induced vibration piezoelectric-triboelectricity coupling energy collection device

Abstract

The invention discloses a piezoelectric-triboelectric coupling energy collection device with wind-induced vibration. The problems that in the prior art, a wind-induced vibration energy collector is low in output power, narrow in working wind speed range and single in energy conversion form are solved. According to the invention, a double-cantilever beam structure is arranged, and piezoelectric ceramics are fixed on the surfaces of the long cantilever beam and the short cantilever beam; the rectangular bluff body is fixed at the free end of the cantilever beam; an elastic sliding block is arranged in a first bluff body fixed with the short cantilever beam; a friction material and a conductive metal layer are respectively fixed on the opposite surfaces of the long cantilever beam and the first bluff body; the fixed end of the double-cantilever beam and the supporting rod are fixed by a plurality of jump springs; a wind direction bag is fixed to the pipe sleeve and forms a rotating pair with the fixed base. The collecting device can be adjusted in a self-adaptive mode and is parallel to the wind direction all the time, the wind energy utilization rate is increased, the vibration frequency is improved, meanwhile, high potential difference is generated through piezoelectric ceramics and friction materials, and the energy output power of the device is improved.

Description

technical field [0001] The invention belongs to the technical field of energy collection, and in particular relates to a piezoelectric-triboelectric coupling energy collection device of wind-induced vibration. Background technique [0002] With the application and development of micro-electromechanical systems (MEMS) in medical and health, industrial production and other fields, new requirements are also put forward for energy supply. Using batteries to power equipment will not only hinder the long-term work of the equipment, but also waste batteries after use can easily cause great pollution to the environment. However, there are various forms of abundant resources in the natural environment that can be used for energy supply, such as wind energy, solar energy, magnetic energy, etc. Therefore, it has become an emerging development direction to make up for the power gap caused by scientific and technological development through the collection and application of environmental...

AI Technical Summary

Problems solved by technology

The electromagnetic type has the disadvantages of complex structure, large volume of coils and permanent magnets

Piezoelectric type is hard and brittle due to the piezoelectric sheet, with limited bearing capacity, easy fatigue damage, and insufficient stability

[0004] In addition to various single energy harvesting forms, wind-induced vibration energy harvesters in the prior art also have a small number of composite energy harvesting forms, such as coupling electromagnetic and piezoelectric, but because the electromagnetic type is greatly affected by the environmental magnetic field, and combined with The structure of the piezoelectric type is more complicated, which is not conducive to practical application, and the voltage amplitude generated by the electromagnetic type and the piezoelectric type are difficult to couple and output in series, and the output power is limited

Therefore, the existing wind-induced vibration energy harvesters still have problems such as single energy conversion method, low utilization efficiency, low vibration frequency, low output power, narrow working wind speed range, and inability to adapt to wind direction.

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