Shipborne positioning device

Abstract

The invention relates to a shipborne positioning device, which belongs to the technical field of ship equipment. An end cover provided with a limiting ring is arranged on the side wall of a main body; the side wall of the main body is provided with a ring table, the bottom wall is provided with a circuit board and an exciter base, and the circuit board is provided with an energy conversion circuit and an information transmitting system; the exciter base is provided with a swinging rod; the end part of the swinging rod is provided with a disc; an excitation cylinder is arranged on the disc; an inertia block is arranged on the disc; multiple groups of piezoelectric vibrators are arranged on the ring table, and the groups of piezoelectric vibrators are separated by separation rings; a substrate and a piezoelectric plate are bonded to form each piezoelectric vibrator, and the piezoelectric plate is arranged close to the bottom wall of the main body; the free end of the substrate is provided with a substrate flange bent towards one side of the piezoelectric plate, and the substrate flange abuts against the excitation cylinder; the piezoelectric vibrator has a flat structure before mounting and has a bent structure after mounting, and the deformation amount of the free end of the piezoelectric vibrator group with the shortest length is half the allowable value in non-working time; and when the excitation cylinder and the limiting ring are contacted, the maximum deformation amount of the piezoelectric vibrator group with the shortest length is smaller than the allowable value.

Description

technical field [0001] The invention belongs to the technical field of ship equipment, and in particular relates to a ship-mounted positioning device. 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 ensure the safe and reliable operation of the ship positioning system, people have started t...

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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