A piezoelectric energy harvesting device for buses

Abstract

The invention relates to a piezoelectric energy harvesting device for a bus. The piezoelectric energy harvesting device comprises a plurality of cantilever beams of piezoelectric vibrators, the cantilever beams are horizontally and parallelly arranged, the ends of the cantilever beams on one side share a mass block (3), the mass block is connected with a lever (5) and used for increasing inertia of the piezoelectric vibrators and transferring stress, the lever leads out vibration, piezoelectric ceramic pieces (2) are positioned on the upper side and the lower side of a cantilever beam substrate (1), the piezoelectric ceramic pieces (2) and the substrate (1) are adhered through conductive adhesives, so that weak mechanical energy in an environment is converted into electric energy, a piezoelectric energy storage device comprises a voltage reduction circuit, a rectifier circuit, a filter circuit and a protection circuit, and stable direct current used or stored by loads is obtained when unstable current generated by the piezoelectric vibrators flows through each regulating circuit. The stored energy can be used for low-power instruments such as a bus detector, an electronic display guideboard, a self-service ticketing device and front-rear television inspection systems, energy-saving effects are achieved, and the piezoelectric energy harvesting device is simple in structure.

Description

technical field [0001] The invention belongs to the field of electrical technology, and in particular relates to a piezoelectric energy harvesting device that can capture energy from environmental vibrations and effectively store the captured energy in a rechargeable battery. Supplementary applications. Background technique [0002] In our country, public transport vehicles are the main force of urban traffic, bearing most of the passenger traffic in urban areas. During the "Eleventh Five-Year Plan" period, among the seven strategic emerging industries determined by the State Council, it is clear that the development focus of the new energy vehicle industry at this stage is electric vehicles and hybrid vehicles. my country has recently arranged 39 research and development projects in the field of new energy vehicles in accordance with the "Twelfth Five-Year Plan", the 863 Plan, and the Science and Technology Support Plan, focusing on supporting the development of key techno...

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Problems solved by technology

Most of these experiments are still in theoretical research. Some applied piezoelectric energy harvesting devices generate very little energy, and there are still some difficulties in the implementation process.

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