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Ultra-wideband underwater acoustic transducer

An underwater acoustic transducer and ultra-broadband technology, applied in the direction of sound-generating devices, instruments, etc., can solve problems such as difficult transducers and difficult-to-produce wideband performance of transducers, and achieve reduced response fluctuations and good vibration phase consistency , the effect of small size and weight

Inactive Publication Date: 2013-02-27
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high frequency of the membrane vibration mode, and it is difficult to control through the adjustment of the structural size of the transducer, it is also difficult to make a beneficial contribution to the broadband performance of the transducer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] refer to figure 2 , image 3 , Figure 4 To make an ultra-broadband underwater acoustic transducer of the present invention, the underwater acoustic transducer is composed of two curved beams 1 and two U-shaped beams 2 connected to form a flexural shell, all of which are made of aluminum alloy materials. The total length of the ultra-wideband underwater acoustic transducer in this embodiment is about 144 mm.

[0034] The driving element 5 of this embodiment is made of a circular piezoelectric single crystal lead magnesium niobate-lead titanate (PMNT69 / 31) wafer, and the wafer size is Φ16m×3mm. Every 18 chips is a group of driving elements, and the piezoelectric crystal stacks are connected in parallel. The wiring is as follows: image 3 shown. A thin metal sheet is sandwiched between the piezoelectric wafers to weld the leads. The size of the thin metal sheet is Φ16m×0.1mm, and it is made of brass. The piezoelectric chip and the metal sheet are bonded one by one w...

Embodiment 2

[0039] Such as Figure 6 As shown, the driving element of the present embodiment adopts a rare earth giant magnetostrictive rod 18, and the outside is covered with a bobbin 16, and a coil 15 is wound on the bobbin 16, and a piece of permanent magnet is respectively placed at both ends of the rare earth giant magnetostrictive rod 18. 17. The rare earth giant magnetostrictive rod 18, the permanent magnet piece 17 and the transition block 4 constitute a vibrator assembly. The transducer assembly process of this embodiment is the same as that of Embodiment 1.

[0040] When the transducer is working, the rare earth giant magnetostrictive rod 18 generates magnetostrictive vibration under the joint action of the static bias magnetic field provided by the permanent magnet sheet 17 and the dynamic driving magnetic field generated after the coil 15 is energized, and the magnetostrictive vibration is generated through the driving element and the housing. The mechanical coupling of the ...

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Abstract

The invention provides an ultra-wideband underwater acoustic transducer, which comprises an arc beam, a U-shaped beam, a transition block and a driving element, wherein the arc beam is a cylindrical shell, the section of which is elliptical arc; the U-shaped beam is a U-shaped curved translation body; the arc beam and the U-shaped beam form a flextensional shell, and two end faces of the flextensional shell are closed by cover plates; and the driving element and the transition block form a vibrator assembly, and the vibrator assembly is arranged in the flextensional shell and rigidly connected with the inner wall of the U-shaped beam. The ultra-wideband underwater acoustic transducer has the characteristics of low frequency, high power, compact structure, small size and light weight, and can be applied in the fields of underwater acoustic detection, antagonism, communication, measurement, marine resource exploration and the like.

Description

technical field [0001] The invention relates to an acoustic sensor, in particular to an ultra-wideband underwater acoustic transducer. Background technique [0002] The underwater acoustic transducer is a device that realizes the conversion of underwater electroacoustic energy. With the rapid development of modern sonar technology and the continuous expansion of the application range of underwater acoustics, higher and higher requirements are put forward for underwater acoustic transducers and transducer arrays. At present, low-frequency, high-power, small-size, and wide-band transmitting transducers are the main research direction of underwater acoustic transducers. With the rapid development of underwater acoustic signal processing technology, more information needs to be obtained from underwater acoustic transducers, and the technical index of broadband transducers is becoming more and more important. In applications such as synthetic aperture sonar, image sonar and App...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K9/12
Inventor 陈思兰宇
Owner HARBIN ENG UNIV
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