Piezoelectric energy harvesting device and method based on mechanical behaviors of asphalt pavement structure layer

By designing a piezoelectric energy capture device that combines the mechanical behavior of the asphalt pavement structural layer, the problem of unreasonable design in the prior art has been solved, and an efficient, stable and durable energy conversion effect is achieved.

CN119675494APending Publication Date: 2025-03-21SHIJIAZHUANG TIEDAO UNIV
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Patent Information

Application Number
CN202510029444.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-08
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

The existing piezoelectric energy capture device fails to fully consider the mechanical behavior of the asphalt pavement structural layer, resulting in unreasonable design and inability to effectively collect piezoelectric energy.

Method used

A piezoelectric energy capture device based on the mechanical behavior of the asphalt pavement structure layer is designed, including a pressurized area of ​​a rectangular structure, a sheared area formed by a dove-bonded structure and a tensile area of ​​an inverted arch structure. By establishing a three-dimensional finite element model, the geometric parameters of the device are optimized to improve the energy harvesting efficiency.

Benefits of technology

It achieves a comprehensive response to various mechanical effects, efficiently collects and stores energy, and can continuously convert mechanical energy into electrical energy under complex traffic loads and variable environments, and has the characteristics of high efficiency, stability and durability.

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Abstract

The invention discloses a piezoelectric energy harvesting device and method based on mechanical behaviors of a bituminous pavement structural layer, the piezoelectric energy harvesting device comprises a pressed area, a sheared area and a pulled area which are sequentially arranged from top to bottom, the sheared area is formed by joggling an upper tooth-shaped structure and a lower tooth-shaped structure, a clamping block is arranged between the upper tooth-shaped structure and the lower tooth-shaped structure, the pulled area is of an inverted arch structure, and the clamping block is arranged between the upper tooth-shaped structure and the lower tooth-shaped structure. The upper tooth-shaped structure comprises an upper tooth end and an upper tooth root, the lower tooth-shaped structure comprises a lower tooth end and a lower tooth root, and gaps are formed between the upper tooth end and the lower tooth root and between the upper tooth root and the lower tooth end. In the application, multiple areas are arranged and matched with the structural layer of the asphalt pavement, so that comprehensive response to multiple mechanical effects is realized, energy can be efficiently collected, stored and utilized, mechanical energy can be continuously and efficiently converted into electric energy under complex traffic load and variable environmental conditions, and the energy utilization efficiency is improved. And the device is not only high in adaptability and high in efficiency, but also excellent in stability and durability.
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