Double-class arc-shaped piezoelectric energy harvester

Abstract

The invention discloses a double-class arc-shaped piezoelectric energy harvester which comprises a cantilever beam, a piezoelectric layer, a fixed mass block and an adjustable mass block. The cantilever beam is an arc-shaped sheet, and the piezoelectric layer is attached to the arc-shaped sheet. The fixed mass block is attached to one end of the arc-shaped sheet, the adjustable mass block is movably attached to the arc-shaped sheet, and a metal fixed end is attached to the right end of the arc-shaped sheet. The arc-shaped sheet has an inner diameter of 20 mm, an outer diameter of 30 mm, a width of 10 mm, and an arc of 180 degrees, and the cantilever beam is made of a phosphor bronze material. The energy harvester can generate high power under a certain structure with 50-degree, 90-degree and 120-degree movement angles of the adjustable mass block, when the movement angle of the adjustable mass block is 60 degrees, the maximum output power of 0.032W can be generated, and a characteristic that the double-class arc-shaped piezoelectric energy harvester can generate the high output power is reflected.

Description

technical field [0001] The invention relates to a two-stage arc type piezoelectric energy harvester, which belongs to the technical field of energy collection. Background technique [0002] The piezoelectric energy harvester uses the piezoelectric effect to convert the mechanical energy that cannot be directly used in the surrounding environment into electrical energy that can be directly used. At present, the commonly used piezoelectric energy harvesters are usually straight structures. Although they can play the role of energy harvesting under this structure, experiments have shown that the frequency range of the energy that can be collected is small, and the output potential is low. In addition, piezoelectric energy harvesters with straight structures have a series of defects such as low stability and low space utilization. The two-degree-of-freedom arc piezoelectric energy harvester is applied to the top or side of the mass block through external vibration, the suspensi...

AI Technical Summary

Problems solved by technology

The commonly used piezoelectric energy harvester is usually a straight structure. Although it can play the role of energy harvesting under this structure, experiments have shown that the frequency range of the energy that can be collected is small, and the output potential is low.

In addition, piezoelectric energy harvesters with straight structures have a series of defects such as low stability and low space utilization.

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