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Periodic structure grooving circular pipe longitudinal-radial vibration conversion underwater acoustic transducer and transduction method

A technology of underwater acoustic transducer and periodic structure, which is applied to transducers, sounding equipment, instruments and other directions used underwater, can solve the problem of large size of low-frequency transducers, and achieve the effect of reducing vibration frequency.

Active Publication Date: 2018-01-26
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the purposes of the present invention is to provide a radially vibrating underwater acoustic transducer with a periodic structure slotted circular tube. Another purpose of the present invention is to provide a method of transducing energy, which realizes the transducer in the frequency range of 550Hz-2000Hz There is a flat transmit voltage response to overcome the problem of large size of the low frequency transducer in the prior art

Method used

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  • Periodic structure grooving circular pipe longitudinal-radial vibration conversion underwater acoustic transducer and transduction method
  • Periodic structure grooving circular pipe longitudinal-radial vibration conversion underwater acoustic transducer and transduction method
  • Periodic structure grooving circular pipe longitudinal-radial vibration conversion underwater acoustic transducer and transduction method

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Embodiment 1

[0034] Embodiment 1: The longitudinal-diameter vibration conversion underwater acoustic transducer of the periodic structure slotted circular tube of the present invention, such as figure 1 As shown, the transducer includes a screw rod 2, and a left end waterproof cable 14, a left end rear cover plate 13, a left end longitudinal vibration excitation unit 20, a slotted circular tube 7, a right end longitudinal vibration excitation unit 21, and a right end Rear cover plate 19 and right end waterproof cable 15.

[0035] Such as figure 2 As shown, the longitudinal vibration excitation unit 20 at the left end includes a sealing sleeve 8, a piezoelectric ceramic stack 5 installed on the screw 2 and a trumpet-shaped front cover 6, the sealing sleeve 8 is set on the piezoelectric ceramic stack 5, and the piezoelectric ceramic stack 5 and the sealing sleeve 8 are located between the left end rear cover 13 and the trumpet-shaped front cover 6, the piezoelectric ceramic stack 5 is formed...

Embodiment 2

[0037] Embodiment 2: as Figure 4 As shown, on the structure of Embodiment 1, an intermediate longitudinal vibration excitation unit and a slotted circular tube are added, and the intermediate longitudinal vibration excitation unit 18 includes a sealing sleeve 8 and a horn-shaped front cover plate at the left end installed on the screw in turn, a piezoelectric The ceramic stack 5 and the horn-shaped front cover at the right end, and the sealing sleeve 8 are set on the piezoelectric ceramic stack, and the piezoelectric ceramic stack 5 and the sealing sleeve 8 are both located between the horn-shaped front cover at the left end and the horn-shaped front cover at the right end. The electric ceramic stack 5 is made of piezoelectric ceramic sheets and electrode sheets 9, and both ends of the piezoelectric ceramic stack 5 are electrode sheets 9. From left to right, the electrode sheets at odd positions are connected to the negative electrode lead , the electrode sheets at the even p...

Embodiment 3

[0038] Embodiment 3: as Figure 5 , on the structure of Example 1, two intermediate longitudinal vibration excitation units and two slotted circular tubes are added.

[0039] When the overall height of the transducer is 512mm and the maximum diameter is 150mm, the characteristic frequency of the underwater model can reach 880Hz. When adding a group of slotted circular tubes and piezoelectric ceramic stacks (that is, the structure of Embodiment 2), the characteristic frequency of the underwater model can be reduced to 630 Hz. When adding two groups of slotted circular tubes and piezoelectric ceramic stacks (that is, the structure of Embodiment 3), the characteristic frequency of the underwater model can be reduced to 520 Hz. However, the frequency range of the TVR flat area of ​​ordinary low-frequency transducers is narrow, so this periodic structure can greatly reduce the characteristic frequency of the transducer and broaden the frequency range of stable emission in the flat...

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Abstract

The invention relates to a periodic structure grooving circular pipe longitudinal-radial vibration conversion underwater acoustic transducer and transduction method. The periodic structure grooving circular pipe longitudinal-radial vibration conversion underwater acoustic transducer includes successively connected waterproof cable, back cover plate, piezoelectric ceramic stack, seal cover, horn-shaped front cover plate, grooving circular pipes, horn-shaped front cover plate, seal cover, piezoelectric ceramic stack, back cover plate, waterproof cable, screw and nut, wherein the piezoelectric ceramic stacks are formed through cross pressing of piezoelectric ceramic pieces and electrode slices; two ends of each piezoelectric ceramic stack are electrode slices; one end of each piezoelectric ceramic piece is connected with an anode lead wire through the electrode slice, and the other end of each piezoelectric ceramic piece is connected with a cathode lead wire through the electrode slice; and the anode lead wire and the cathode lead wire of each piezoelectric ceramic stack are connected with the corresponding waterproof cable through a threading hole of the corresponding back cover plate. The periodic structure grooving circular pipe longitudinal-radial vibration conversion underwater acoustic transducer solves the problem that a low frequency energy transducer in the prior art is bigger in the size. The periodic structure grooving circular pipe longitudinal-radial vibration conversion underwater acoustic transducer has flat transmitting voltage response in the 550Hz-2000Hz frequency scope. Besides, the periodic structure grooving circular pipe longitudinal-radial vibration conversion underwater acoustic transducer has the advantages of small overall size, simple structure and manufacturing technique, and low cost.

Description

technical field [0001] The invention belongs to the field of underwater acoustic transducers, and in particular relates to an underwater acoustic transducer and an energy conversion method for longitudinal-diameter vibration conversion of a periodic structure slotted circular tube. Background technique [0002] In the field of underwater detection technology, low-frequency transducers occupy an important position, and the most commonly used low-frequency transducers are mainly realized by liquid cavity vibration and bending vibration. However, such low-frequency transducers are generally large in size and mass, and there are many limitations in practical applications. Aiming at this problem, many scholars at home and abroad have done related research. Liu Zhenjun and others developed a cylindrical overflow low-frequency broadband transducer based on tangentially polarized piezoelectric ceramic rings, using the coupling of liquid cavity vibration and radial vibration to make...

Claims

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Application Information

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IPC IPC(8): G10K9/12H04R1/44H04R1/28
Inventor 张光斌邓云云张小凤
Owner SHAANXI NORMAL UNIV
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