Low damping mechanical underwater acoustic transducer driven by ocean current energy and its energy conversion method

Abstract

The invention provides an ocean current energy-driven low-damping mechanical acoustic transducer and an energy conversion method thereof. The ocean current energy-driven low-damping mechanical acoustic transducer mainly consists of a front end cover, a sound production tube, a connecting tube, a back end cover, a left bearing bracket, a right bearing bracket, a knocking rod, a linear bearing, a double-head supporting seat, a pressure spring, a linear bearing baffle, a knocking wheel and a transmission shaft; in the low-frequency acoustic transducer, the transmission shaft is driven to rotate by the ocean current energy; the transmission shaft drives the double-head supporting seat fixed on the shaft to rotate; the knocking rod is moved reciprocally in the linear bearing fixed on the double-head supporting seat; the pressure spring connected with the knocking rod stores and releases energy periodically along with the fluctuation of the inner wall surface of the sound production tube so as to knock the inner wall of the sound production tube to produce sound; the sound signal has high loudness and wide frequency band, and is positioned in a low-frequency range; sound energy required for underwater detection can be produced by directly utilizing the ocean current energy; and the ocean current energy-driven low-damping mechanical acoustic transducer has a novel principle, low mechanical loss, high efficiency, compact structure, reliable sealing, high bearing capacity and long in service life, and is easy to manufacture.

Description

technical field [0001] The invention belongs to the fields of new energy utilization and transducer design, and relates to a mechanism for generating low-frequency sound signals through mechanical knocking by using ocean current energy under water. 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 continuous expansion of the field of human activities to the ocean, people have widely used underwater sound sources according to different requirements. Underwater sound sources are use...

AI Technical Summary

Problems solved by technology

However, the main generation methods of underwater sound sources have the following deficiencies: the long-term sound can only be produced in water under the condition of continuous external energy supply; the friction resistance is large during operation, and the energy utilization rate is low; none of them are generated by mechanical percussion, so it is difficult to be real imitates the sound of mechanical equipment operating in water

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