A Low Frequency Broadband Piezoelectric Generator Excited by High Pressure Gas

Abstract

The invention discloses a high pressure gas stimulated low-frequency broadband piezoelectric generator, and solves the problem that a current piezoelectric generator is narrow in energy harvesting frequency band and low in energy harvesting efficiency. The high pressure gas stimulated low-frequency broadband piezoelectric generator consists of a high pressure stimulation cavity, a piston drive power generation assembly, a piezoelectric power generation cavity, a set screw and a gasket, wherein the high pressure stimulation cavity and the piezoelectric power generation cavity are connected through the set screw in a fastening manner; and the piston drive power generation assembly is placed inside the high pressure stimulation cavity. Under high pressure gas stimulation, vibration is generated by a non-linear structure consisting of a spring, a groove piston and a rear end cover, and electric energy is generated by a piezoelectric element based on a direct piezoelectric effect. Through the adoption of a multi-mode broadband structure design and the combination of a mechanical frequency modulation method, high-amplitude vibration of the piezoelectric power generator under low-frequency stimulation is realized, the energy harvesting frequency band of the piezoelectric power generator is broadened, and the energy harvesting efficiency of the piezoelectric power generator is effectively improved. The piezoelectric generator is novel in structure and high in energy utilization rate, and has wide application prospects in the field of pneumatic technology.

Description

technical field [0001] The invention relates to a low-frequency broadband piezoelectric generator excited by high-pressure gas, which belongs to the field of pneumatic technology. Background technique [0002] Pneumatic technology is an engineering technology that uses air compressors as the power source and compressed air as the working medium for energy and signal transmission. It is one of the important means to realize automatic production and industrial control. And other advantages are widely used in processing, manufacturing, automobile production and other fields. With the continuous development of pneumatic technology, people have higher and higher requirements for the intelligentization of pneumatic systems. The application of Internet of Things technology in pneumatic systems is one of the main ways to realize the intelligentization of pneumatic technology. At present, the Internet of Things nodes in the pneumatic system are usually composed of sensors and wirele...

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Problems solved by technology

[0004] In order to solve the problems of narrow energy capture frequency band and low energy capture efficiency in the current piezoelectric generator used for energy supply of Internet of Things nodes in the pneumatic system, the present invention discloses a low-frequency broadband piezoelectric generator excited by high-pressure gas, which realizes The high-amplitude vibration of the piezoelectric generator under low-frequency excitation broadens the energy-harvesting frequency band of the piezoelectric generator and effectively improves the energy-harvesting efficiency of the piezoelectric generator

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