Design And Experimental Research On Fluid-Coupled Piezoelectric Vibration Energy Harvester

In order to ensure a continuous powered of micro-power electronics, Piezoelectric power generation technology use piezoelectric materials has become a hot field of current research. Considering the traditional hydraulic transmission with low noise, no impact, high energy density and other advantages, In this paper, we will introduce the fluid to piezoelectric vibration energy harvesting system, it use fluid to transfer the motion and dynamic, piezoelectric vibration energy harvester harvest the vibration energy is through piezoelectric fluid coupling effect. It use system modeling, simulation theory analysis, designing and machining, testing methods to research the energy harvesting of energy harvester. The main contents are as follows:1、The background and meaning of piezoelectric vibration energy harvester, it relates to Piezoelectric vibration generation technology, the use of the piezoelectric vibration control technology, flow energy harvesting is use of piezoelectric research status were analyzed and summarized.2、Circular double-crystal piezoelectric vibrator is the core component of the piezoelectric vibration energy harvester, determine its working methods and clamping Modal, analysis the deformation curve in the simply supported boundary conditions by subjected to uniform loads of circular double-crystal piezoelectric Vibrator, establishing the power generation theoretical model of circular double-crystal piezoelectric vibrator, using the numerical analysis method to optimization design a circular double-crystal piezoelectric vibrator.3、It shows the structure of a piezoelectric hydraulic isolator and schematics, and in accordance with the relevant knowledge of vibration mechanics, fluid mechanics, and piezoelectric knowledge established a theoretical model of energy harvester. and using this model to derive its voltage and energy expressions, it simulated and discussed the performance of the power factor, select the external excitation amplitude, mass and the system backpressure factors, to obtain the power voltage frequency graph in the frequency domain, analyze the influence of various factors on the energy harvester power generation, and study the influence of the best power generation point by system backpressure and mass.4%In order to prove the feasibility of vibration energy harvesting and the reasonableness of established theoretical model by piezoelectric vibration energy harvester. It based on the proposed structure and schematic of the energy harvester to design and process the components of the system. manufacturing the piezoelectric vibration energy harvester, and building a reasonable test system to research on the harvester’s energy harvesting, testing harvester actual power generation capacity. Setting the harvester in the excitation frequency, excitation amplitude, the system backpressure, mass to generate power, analyzes and summarizes the impact of these various factors on the performance of power harvester. The experimental results verify correctness of theoretical and the results of the simulation analysis.