Design And Research Of Push-Grinding Piezoelectric Power Generator Driven By Fluid

Energy and love are eternal topics of human development.Because the traditional batteries need to be replaced regularly and there are serious threats to the environment,it has become a hot spot to use renewable energy in the working environment of wireless sensor networks to provide real-time power for them in accordance with the concept of socialist modernization.Compared with other power generation methods,piezoelectric power generation has its own advantages,such as simple structure,easy fabrication,no electromagnetic interference,and easy to achieve miniaturization.It has been widely concerned and applied in the field of wireless sensor.Wind energy and water flow energy are ubiquitous in China's vast land and rivers and sea areas.This paper designs a fluid-driven piezoelectric power generation device.Through the transmission device designed in this paper,wind energy is converted into vibration energy,and then vibration energy is collected by piezoelectric cantilever beam,which provides real-time power for wireless sensor network nodes in the field environment.The main contents of this paper are as follows:1.On the basis of studying and summarizing the current research situation of piezoelectric power generation at home and abroad,the direction of fluid-driven piezoelectric power generation is determined,the problems are found,and the solutions to the problems are conceived.2.The basic theoretical knowledge of piezoelectric power generation is studied and analyzed.The piezoelectric cantilever beam is chosen as piezoelectric vibrator and the piezoelectric chip material PZT-5H piezoelectric ceramics are selected.The equivalent vibration model of the single-degree-of-freedom spring mass block of the piezoelectric cantilever beam is established,and the vibration differential equation of the cantilever beam is deduced,which provides theoretical guidance for the manufacture of the piezoelectric cantilever beam.3.A fluid-driven piezoelectric power generation device is designed.The device consists of three parts: blade,power box and base.The core power generation element is piezoelectric cantilever beam placed inside the power box.Fluid action on the blade causes the power box to rotate,which results in the indirect excitation of piezoelectric cantilever beam by permanent magnet,and then the cantilever beam generates electricity.The piezoelectric cantilever beam is simulated and analyzed.The influence of material and parameter size of piezoelectric cantilever beam on the power generation performance of piezoelectric cantilever beam is obtained,which provides a theoretical basis for the prototype of piezoelectric power generation device.It provides a theoretical guidance for the manufacture of the prototype of piezoelectric power generation device.4,The experimental prototype of the push-grinding piezoelectric generator is made.The wind is used as the fluid to carry out the experimental research.The influence of wind speed,the radial and circumferential arrangement of piezoelectric cantilever beam and the distance between permanent magnets on the power generation performance of the generator is analyzed through the experiment.The innovation of the device is that it can receive fluid kinetic energy in all directions in the horizontal plane,and because of the use of push-grinding transmission blades,it generates greater rotational power under the impact of fluid,thus realizing the start-up and normal operation of the piezoelectric device under smaller wind speed or fluid flow speed.