Environment Vibration Energy Harvesting Based On The Piezoelectric Material

With the development of science and technology, all kinds of portable power generation deviceresearch will become the new hot research topic, the purpose of which is to some special applicationfield replacement battery or automatic to charge the battery. Use of every kind of power generationprinciple structure of power generation unit has its own characteristics and application fields,piezoelectric power generation device features simple structure, no electromagnetic interference, easyto manufacture and the realization of the structure of the miniaturization, integration, etc., especiallysuitable for all kinds of sensor and monitoring system. Based on the piezoelectric cantilever structuretheory characteristic analysis, it is concluded that the piezoelectric vibrator best structure size, and makethe piezoelectric bimorph oscillator, the classical energy acquisition circuit and synchronization chargedector through Multisim simulation, and through the experiment and simulation comparison by line.The design of the energy storage circuit, realize the lithium battery charge. The concrete researchcontent is as follows:Through the analysis of the characteristics of the environment vibration source theoretical basis,combined with piezoelectric materials research analysis place suitable for piezoelectric energyacquisition mode of vibration. For twin piezoelectric cantilever beams that modeling theory formula.Through the numerical analysis for piezoelectric vibrator structure size, material properties and want topass parameters on the output power, resonance frequency, the influence of the optimal load. By usingANSYS software and simulation results were verified in theory. Using the proposed some conclusionsto the traditional beam shape optimization, and certain resonance frequency, vibration acceleration,dimension space limitation on piezoelectric twin cantilever beams optimization design synchronouscharge rectifier circuit and DC-DC converter, and use Multisim to design of circuit simulation. Finallychoose the suitable piezoelectric materials and substrate materials, making the piezoelectric bimorphoscillator, building the experimental platform, measured in various incentive under the action ofperformance and the simulation results are compared, and realize the lithium battery charging.