Piezoelectric energy harvesting device

Abstract

The invention discloses a piezoelectric energy harvesting device. The piezoelectric energy harvesting device is composed of an outer ring, an inner cylinder and a plurality of cantilever beam type piezoelectric energy harvesting vibrators, grooves are regularly axially and radially reserved on the outer ring and the inner cylinder, and the piezoelectric energy harvesting vibrators can be jointed with the outer ring and the inner cylinder via the grooves. The inner cylinder is shorter than the outer ring, and the upper end face and the lower end face of the inner cylinder after being mounted are arranged in the outer ring. When the inner cylinder is applied with external force, the piezoelectric energy harvesting vibrators are driven to vibrate simultaneously to amplify frequency of a vibration source. According to above structure, low-frequency vibration in an environment can be converted into high-frequency vibration and then converted into electric energy. The piezoelectric energy harvesting device is simple in structure and high in energy harvesting efficiency.

Description

technical field [0001] The invention relates to the field of piezoelectric energy harvesting, in particular to a piezoelectric energy harvesting device. Background technique [0002] With the intensification of global warming and the shortage of non-renewable resources such as oil, coal and natural gas, people are paying more and more attention to new, sustainable and clean renewable energy. Capturing environmental energy has become a widely used method to develop new energy sources. At present, the capture of environmental energy is mainly based on the utilization of natural energy such as solar energy and wind energy, but these are limited by natural conditions and cannot provide energy stably. Vibration energy can be seen everywhere in the environment, such as roads on which vehicles drive, airport runways, network nodes, etc. The capture of these vibrational energies will open up a new way of sustainable green energy. [0003] There are three ways to capture vibration...

AI Technical Summary

Problems solved by technology

However, the single cantilever piezoelectric vibrator can capture less energy

In the existing multi-cantilever piezoelectric vibrator, each cantilever performs energy capture independently, and the frequency of the captured electricity varies with the structure, which increases the complexity and cost of subsequent processing and control circuits.

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