A frequency adjustable piezoelectric vibration power generation device

Abstract

The invention provides an adjustable frequency piezoelectric vibration power generator. The adjustable frequency piezoelectric vibration power generator comprises an L-shaped base, a T-shaped cantilever beam, a C-shaped slip table, a micrometer head, a quenching and tempering bolt, a piezoelectric sheet, a slip table nut, and installation screws. The L-shaped base is connected with the C-shaped slip table in a cooperated way, and the L-shaped base and the C-shaped slip table can slide with respect to each other. The micrometer head is fixedly connected with the C-shaped slip table, and is fixedly disposed on the L-shaped base. One end of the T-shaped cantilever beam is fixedly disposed on the L-shaped base, and the free end thereof is fixedly provided with the quenching and tempering bolt after passing through the C-shaped slip table. The piezoelectric sheet is attached to the T-shaped cantilever beam. The whole power generator is fixedly disposed on an environmental structure by the installation through holes of the L-shaped base. When the T-shaped cantilever of the power generator is vibrated under action of external excitation, the T-shaped cantilever beam is used to drive the piezoelectric sheet to vibrate, and then the piezoelectric sheet is deformed to generate power. By turning a knob, the C-shaped slip table can move forwards and backwards in the direction of the cantilever beam to change the effective cantilever length of the T-shaped cantilever beam, and therefore the adjustable frequency of the power generator is realized.

Description

technical field [0001] The invention relates to a frequency-adjustable piezoelectric vibration power generation device, which belongs to the technical field of power generation. Background technique [0002] Since wireless sensor nodes are powered by traditional batteries (lithium polymer, nickel metal hydride batteries), their service life is limited, and they are easily damaged in complex external environments, resulting in high maintenance costs and pollution from chemical waste. The piezoelectric vibration power generator (Piezoelectric vibration power generator, PVPG) can collect the vibration energy of the wireless sensor network environment, convert it into electrical energy and supply power to the sensor nodes in the network, and ensure the long-term effective work of the wireless sensor network. Since the current PVPG based on the piezoelectric effect is mainly a thin metal cantilever beam piezoelectric vibrator structure, it has the disadvantages of a single resona...

AI Technical Summary

Problems solved by technology

[0004] Purpose: In order to overcome the deficiencies in the prior art and solve the problem of single resonance frequency and narrow operating frequency band of the piezoelectric vibration power generation device in the prior art, the present invention provides a piezoelectric vibration power generation device with adjustable frequency, which can realize frequency Adjustment, improve the adaptability of the device to the environment, and achieve higher power generation efficiency

Images