Efficient wideband vibrating energy collector with elastic amplifying mechanism

Abstract

The invention discloses an efficient wideband vibrating energy collector with an elastic amplifying mechanism and belongs to the technical field of new energy and power generation. The vibrating energy collector comprises a shell, the elastic amplifying mechanism, a cantilever beam piezoelectric vibrator and a spring-mass system, wherein the shell is formed in such a way that 4 lightweight metal plates are fixed between an upper end cover and a lower end cover through bolts to form a tetrahedron; U-shaped connecting seats for fixing the cantilever beam piezoelectric vibrator are arranged on the lightweight metal plates; the elastic amplifying mechanism comprises a spring element and a damping element; the elastic amplifying mechanism is fixed between a base and the shell through a bolt; the cantilever beam piezoelectric vibrator comprises an upper piezoelectric ceramic chip, a lower piezoelectric ceramic chip, a metal substrate and a magnet; the upper piezoelectric ceramic chip is bonded at the top of the metal substrate and the lower piezoelectric ceramic chip is bonded at the bottom of the metal substrate; one end of the metal substrate is fixed on the U-shaped connecting seat through a bolt; the magnet is mounted at the other end of the metal substrate; the spring-mass system comprises a tension spring, a pressure spring and mass block; one end of the tension spring is connected with the bottom surface of the upper end cover; one end of the pressure spring is connected with the top surface of the lower end cover; the other ends of the tension spring and the pressure spring are respectively connected with the mass block; the magnet is embedded on the periphery of the mass block; and reverse magnetic poles of the magnet at the end part of the piezoelectric vibrator and the magnet embedded on the periphery of the mass block are oppositely mounted. The efficient wideband vibrating energy collector with the elastic amplifying mechanism, disclosed by the invention, has the advantages that the amplitude of weak vibrating displacement of the base can be amplified, the power generating energy and conversion efficiency of the piezoelectric vibrator are increased and efficient wideband energy collection and conversion can be achieved.

Description

technical field [0001] The invention belongs to the technical field of new energy and power generation, and specifically relates to a high-efficiency broadband vibration energy harvester with an elastic amplifier, which is used to amplify the amplitude of the weak vibration displacement of the base, and improve the power generation energy and conversion efficiency of the piezoelectric vibrator. Realize high-efficiency, wide-band energy harvesting and conversion. Background technique [0002] In order to solve the self-power supply problem of wireless sensor network nodes and electronic equipment with small size, low cost and low power consumption, and reduce the pollution of waste electrochemical batteries to the environment, micro-energy harvesting technologies based on the principles of piezoelectricity, static electricity, and magnetoelectricity have been developed. It has become a research hotspot at home and abroad. As a unique form of energy in human daily life, vibra...

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Problems solved by technology

[0004] The invention discloses a high-efficiency broadband vibration energy harvester with an elastic amplification mechanism to solve the problems of narrow operating frequency band and low energy conversion efficiency of existing piezoelectric energy harvesters, especially when the external vibration is relatively weak and the power generation capacity is low.

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