Multidimensional vibration energy harvester

Abstract

The invention relates to a multidimensional vibration energy harvester, and belongs to the piezoelectric generating technical field; an upper cover is arranged on the housing side wall, and provided with an upper cylinder and a limit ring; the housing side wall is provided with an annular platform, the housing bottom wall is provided with a lower cylinder, a limit ring and a circuit board; the top and bottom of an isolation plate of an exciter are symmetrically provided with spherical segments and exciting rings; the isolation plate and the exciting rings on two sides can form an annular groove; the spherical segments on two sides of the isolation plate are concentric; the spherical segment center and the exciting ring center are eccentric in the horizontal direction; the exciting ring exciting surface is a slope; the annular groove, far away from the spherical segment center, of the exciter is provided with an inertia block; the spherical segments on two sides of the isolation plate are respectively placed in the recessed spherical surface on the end portions of the upper and lower cylinders; the upper and lower cylinders are respectively sleeved by a reset spring; the housing annular platform is provided with two piezoelectric oscillators separated by an isolation ring; the piezoelectric oscillator is formed by bonding a substrate with a piezoelectric patch; the substrate end portion is provided with a flange; the substrate is mounted close to the isolation ring; the piezoelectric oscillator abuts against the exciting surface.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric power generation, and in particular relates to a multi-dimensional vibration energy harvester for supplying power to a ship positioning and tracking system. Background technique [0002] The ship positioning and tracking system has been widely used on civil ships, providing a strong guarantee for the ship's navigation safety, timely rescue, and search and rescue after losing contact. However, the existing positioning and tracking systems are all based on engine power supply. Once an accident occurs on the ship and the engine and the entire power system fail, the positioning and tracking system will lose its proper function. In addition, the existing positioning and tracking systems are all external, and cannot work normally when the ship is wrecked and flooded, and the positioning system is easily shut down or destroyed after the ship is hijacked by criminals. In recent years, in order to e...

AI Technical Summary

Problems solved by technology

However, most of the piezoelectric generators currently proposed for ship positioning and tracking systems are directly excited by the additional mass inertial force on the piezoelectric vibrator, so they can only collect energy in a fixed vibration direction and the resonant frequency is poorly adjustable; the most critical is The piezoelectric vibrator is subjected to two-way excitation and two-way bending deformation during operation. When the ship vibrates or shakes in the wind and waves with a large amplitude, the brittle piezoelectric material is easily broken due to excessive tensile stress.

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