A digital underwater acoustic transducer unit, array and device and a control method

A technology of underwater acoustic transducers and unit arrays, applied in the field of devices and controls, digital underwater acoustic transducer units, and arrays, can solve the problems that cannot be applied in the field of underwater acoustics and have large differences, and achieve the improvement of low-frequency acoustic radiation ability, avoid easy damage, and reduce volume

Active Publication Date: 2018-02-02
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Digital air speakers have lower power consumption and better sound quality, which is one of the main directions of development in this field. However, due to the large difference between air and water media, the existing design structures and methods cannot be applied to Underwater acoustic field

Method used

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  • A digital underwater acoustic transducer unit, array and device and a control method
  • A digital underwater acoustic transducer unit, array and device and a control method
  • A digital underwater acoustic transducer unit, array and device and a control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] see figure 1 with figure 2 , a digital underwater acoustic transducer unit, comprising an outer wall 1, two piston radiation surfaces 2, two permanent magnets 3 and an electromagnet 4 composed of an iron core 41 and a coil 42; both ends of the outer wall 1 are provided with There is a sealing film 5, which completely isolates the inside and outside of the transducer unit 10. Each of the piston radiation surfaces 2 is fixed on the inner surface of the sealing film 5 and arranged in one-to-one correspondence. The two are fixed by bonding or vulcanization. The piston radiating surface 2 is fixed on the outer wall 1 through an elastic member 6. Under the constraint of the elastic member 6, the piston radiating surface 2 can move in the axial direction, and the two piston radiating surfaces 2 pass through a The connecting rod 7 is connected and fixed, and the rigid connecting rod effect is better for the connecting rod 7, and the two piston radiation surfaces 2 can only vi...

Embodiment 2

[0068] see image 3 with Figure 4 A digital low-frequency broadband underwater acoustic transducer unit array, the transducer unit array 20 is composed of a plurality of transducer units 10 arranged horizontally. The number of transducer units 10 is determined by the number of bits of the digital sampling signal to be converted. Take the number of transducer units 10 as 2 M As an example (the said M is a positive integer), the conversion of M-digit digital sampling signals to physical sound signals can be realized. Each of the transducer units is independent of each other. Generally, each of the transducer units 10 is connected to a power amplifier (not shown) in a one-to-one correspondence, and the input interface of each of the transducer units 10 is connected to its Corresponding to the power amplifier, the power amplifier controls the current on and off of the transducer unit 10 and the direction of the current according to the received control signal.

[0069] The wo...

Embodiment 3

[0073] see Figure 5 , a digital low-frequency broadband underwater acoustic transducer device, comprising a transducer unit array 20, a cavity 23 and an airbag 24, the transducer unit array 20 is composed of the transducer unit (10 ) composition; the cavity 23 offers a hole, the transducer unit array 20 is arranged at the hole and is airtightly combined with the hole, and the wall of the cavity 23 is also provided with a water-permeable hole 26; the airbag The opening of 24 is tightly combined with the back side of the transducer unit array 20 to form a closed air cavity, the air bag 24 is placed in the cavity 23 , and the air bag 24 is also provided with an inflation hole 27 . The inflation hole 27 can generally be fixed on the outer wall of the cavity 23 to facilitate inflation.

[0074] When the transducer device is placed underwater, the cavity 23 is filled with liquid and communicates with the surrounding waters through the permeable hole 26, and air is stored in the ai...

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PUM

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Abstract

The invention relates to a digital underwater acoustic transducer unit. Two end faces of an outer wall are provided with a sealing film each; each piston radiation surface is fixed to an inner side surface of the corresponding sealing film; the piston radiation surfaces are fixed to the outer wall via elastic members; the two piston radiation surfaces are connected and fixed via a connection rod;a permanent magnet is fixed to the inner side surface of each piston radiation surface; the surfaces, in contact with the piston radiation surfaces, of the permanent magnets have the same polarity; aniron core is provided with a through hole in the middle; the connection rod penetrates the through hole; a coil is wound around the outer side surface of the iron core; an electromagnet is fixed to the outer wall via a fixing connector; end faces of the iron core are corresponding to the positions of the permanent magnets; the transducer unit is filled with oil liquid. The invention also providesa digital low frequency broadband underwater acoustic transducer array and device and a control method. The digital underwater acoustic transducer unit, array and device have the advantages of smallsize, low weight and low power consumption and can realize underwater low frequency large power radiation.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic transducers, and in particular relates to a digital underwater acoustic transducer unit, array, device and control method. Background technique [0002] Acoustic waves are the only known information carrier capable of long-distance underwater transmission. Acoustic methods are the main means of underwater detection, measurement, target identification and positioning, marine geological exploration and many other fields, and their applications are deepening day by day. With the development of modern underwater acoustic technology, the low-end operating frequency of sound waves has been extended to the very low frequency band below 100 Hz in some fields. Therefore, as a necessary tool for the implementation of underwater acoustic technology, low-frequency broadband underwater acoustic transducers, Especially the development of the transmitting transducer is of great significance and value...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/44H04R9/02H04R9/06
CPCH04R1/44H04R9/02H04R9/06H04R2400/11
Inventor 安峰岩刘碧龙
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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