Shipborne piezoelectric energy harvester

Abstract

The invention relates to a shipborne piezoelectric energy harvester, and belongs to the piezoelectric power generating technical field; an upper cover is arranged on the housing side wall end portion, and provided with an upper sleeve and a limit ring; the housing side wall is provided with an annular platform, and the housing bottom wall is provided with a lower sleeve, a limit ring and a circuit board; a plunger with an end cap on one end is respectively sleeved in the upper and lower sleeves; the end cap outer rim is provided with an inner magnet ring, and the end face is embedded with beads; a buffer spring and a balancing spring are respectively pressed in the upper and lower sleeves through the plunger; an exciter comprises an isolation plate and exciting rings arranged above and below; the isolation plate and the exciting rings form an annular groove, and an inertia block is arranged in the annular groove; the exciting ring exciting plane is a slope inclining to the exciting ring inner side; the exciting ring inner wall is provided with an outer magnet ring, and same magnetic poles of the outer magnet ring and an inner magnet ring are arranged in opposite; the isolation plate top and bottom respectively abut against the plunger end caps in the upper and lower sleeves through the beads; the housing annular platform is provided with two piezoelectric oscillators separated by an isolation ring, and the piezoelectric oscillator end face abuts against the exciting plane.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric power generation, and in particular relates to a ship-borne piezoelectric energy harvester, which supplies power for 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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