Permanent-magnet low-frequency underwater acoustic transducer based on drive of ocean current energy

Abstract

The invention provides a permanent-magnet low-frequency underwater acoustic transducer based on the drive of ocean current energy, and the permanent-magnet low-frequency underwater acoustic transducer mainly comprises a tile-shaped permanent magnet, a cylindrical permanent magnet, a pressure-resistant cylinder and a gong-shaped sounding body, and the acoustic transducer is characterized in that in the principle that polar repulsion and heterospolar suction between the cylindrical permanent magnet and the tile-shaped permanent magnet, an outer cylindrical permanent magnet of the pressure-resistant cylinder is controlled to make reciprocating movement by continuously changing the magnetic pole of the tile-shaped permanent magnet inside the pressure-resistant cylinder, the cylindrical permanent magnet drives a striking head to continuously strike the gong-shaped sounding body in the ocean current to make sound, and the sound signal has large loudness and wide frequency width and stays in the low-frequency range. The acoustic energy needed by the underwater detection is continuously produced by directly utilizing the ocean current energy, the principle is novel, easiness in manufacturing is realized, the structure is compact, reliability in sealing is realized, the rigidness and the strength are high, the pressure bearing capacity is strong, and the service life is long.

Description

technical field [0001] The invention belongs to the field of new energy utilization and transducer design, and relates to a device that uses ocean current energy to control a mechanism to strike a gong-shaped sounding body to generate low-frequency sound signals through permanent magnetic force underwater, and specifically relates to a device driven by ocean current energy. Permanent magnet type low frequency underwater acoustic transducer. Background technique [0002] People's research on modern underwater acoustics began in 1826 with the experiment of measuring the speed of sound in water carried out by Swiss physicist Collado and French mathematician Stummer in Lake Geneva. In 1911, someone used a bomb as a sound source to carry out the first underwater echo detection experiment, and successfully recorded the echo to the bottom of the sea. It can be said that the sound source of the bomb explosion is the earliest underwater sound source used by people. In recent years,...

AI Technical Summary

Problems solved by technology

However, the main underwater sound source generation methods have the following disadvantages: the sound source is in a sealed cavity, and there is a loss of sound energy transmission; mechanical transmission, the energy loss is large; the sound can be produced in water for a long time under the condition of continuous external energy supply; Produced by mechanical percussion, it is difficult to truly imitate the sound of mechanical equipment running in water

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