A percussive low-frequency underwater acoustic transducer driven by ocean current energy

Abstract

The invention provides a percussion-style low-frequency underwater acoustic transducer driven by marine current energy. The percussion-style low-frequency underwater acoustic transducer comprises a main cylindrical permanent magnet, an auxiliary cylindrical permanent magnet, a cylinder, a percussion member, an acoustic shell, an acoustic tube and the like. The principle of homopolar repulsion and heteropolar attraction between the main cylindrical permanent magnet and the auxiliary cylindrical permanent magnet is adopted; by continually changing magnetic poles of the main cylindrical permanent magnet in the cylinder, the auxiliary cylindrical permanent magnet outside the cylinder is controlled to reciprocate, and a percussion head is driven by the auxiliary cylindrical permanent magnet to periodically percuss the panels of the acoustic tube and the acoustic shell to make sound; and the acoustic signals are high in loudness and wide in frequency band which is in the lower band range. Marine current energy can be directly used for continuously generating acoustic energy required by underwater detection; and the percussion-style low-frequency underwater acoustic transducer is novel in principle, easy to manufacture, compact in structure, reliable in sealing, high in energy utilization rate and long in service life.

Description

technical field [0001] The invention belongs to the field of new energy utilization and transducer design, and relates to a device that utilizes ocean current energy to control a mechanism to tap a sounding shell to generate low-frequency sound signals through permanent magnetic force underwater, and specifically relates to a tapping device driven by ocean current energy. 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, with the continuou...

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Problems solved by technology

However, the main underwater sound source generation methods have the following shortcomings: mechanical transmission, large energy loss, and low utilization rate of ocean current energy; long-term sound in water can only be produced under the condition of continuous external energy supply; the sound signal is mainly high-frequency, and low-frequency sound The signal is small; none of them are generated by mechanical percussion, and it is difficult to truly imitate the sound of mechanical equipment running in water; the sound source is in a sealed cavity, and there is a loss of sound energy transmission

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