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Electromagnetic underwater acoustic transducer based on gas spring and control method

A technology of underwater acoustic transducer and gas spring, applied in the direction of fluid using vibration, can solve the problems of low power, large size, weak radiation, etc., and achieve the effect of large vibration amplitude and large electromagnetic thrust

Active Publication Date: 2020-10-27
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The problem to be solved by the present invention is to provide an electromagnetic underwater acoustic transducer based on gas springs for the problems of large size, low power and weak radiation of traditional low-frequency transducers

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  • Electromagnetic underwater acoustic transducer based on gas spring and control method
  • Electromagnetic underwater acoustic transducer based on gas spring and control method
  • Electromagnetic underwater acoustic transducer based on gas spring and control method

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings of the present application. Apparently, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0055] Such as figure 1 , image 3 As shown, the present invention provides an electromagnetic underwater acoustic transducer based on a gas spring, including a cylinder body, a seal 10, a radiator 8 that is slidably connected to the inner wall of the cylinder and can slide along the axis of the cylinder. The outer end surface of the body and the outer end surface of the radiator 8 are respectively fixedly connected with the seal 10, and the cylinder body, the sea...

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Abstract

The invention provides an electromagnetic underwater acoustic transducer based on a gas spring and a control method. The underwater acoustic transducer comprises a cylinder, a radiating piece and a sealing piece forming a water-tight space. An armature and a magnetism conducting base are contained inside the water-tight space. The magnetism conducting base and the armature are wound by a first driving coil and a second driving coil respectively. The first driving coil and the second driving coil are powered by independent alternating current power sources so that one end of the magnetic conducting base and one end of the armature can generate identical or opposite magnetic poles, and the two components vibrate through electromagnetic repulsive force or electromagnetic attraction. The portion between the magnetism conducting base and the armature is filled with gas as the gas spring for balancing hydrostatic pressure and supplying rigidity needed by vibration. In the front-stage vibration period, drive current is controlled to generate electromagnetic repulsive force to push the armature to move from the initial balance position, and at the later vibration period, electromagnetic attraction is mainly relied on to pull back the armature to the balance position. The electromagnetic thrust is larger, the vibration amplitude is larger, and the purposes that the size is small, the weight is low, and high-power ultra-low frequency sound wave output is generated are achieved.

Description

technical field [0001] The invention relates to an electromagnetic (reluctance variable) underwater acoustic transducer based on a gas spring and a control method, in particular to an ultra-low frequency high-power electromagnetic underwater acoustic transducer device for ocean detection. Background technique [0002] Today's ocean detection mainly relies on sound waves, and the propagation distance of sound waves in the sea is closely related to the frequency. The lower the frequency of sound waves, the farther they can travel in water. The low-frequency and high-power underwater acoustic transducers currently used with active materials as the core work at a frequency above 300 Hz, which has a large attenuation in water and low energy transfer efficiency. For the application requirements of lower frequency bands (such as the ultra-low frequency band below 100 Hz), the size, weight and cost of these transducers will become very large. However, the dynamic and explosive ultr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B06B1/04
CPCB06B1/045B06B2201/74B06B2201/57Y02A90/30
Inventor 杨鑫李赟汪柏松杨明智罗安
Owner HUNAN UNIV
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