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A periodic structural slotted circular tube longitudinal-diameter vibration conversion underwater acoustic transducer and energy conversion method

A technology of underwater acoustic transducers and periodic structures, applied to transducers, sound-generating devices, instruments, etc. used underwater, can solve the problem of large size of low-frequency transducers and achieve the effect of reducing vibration frequency

Active Publication Date: 2020-12-01
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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  • A periodic structural slotted circular tube longitudinal-diameter vibration conversion underwater acoustic transducer and energy conversion method
  • A periodic structural slotted circular tube longitudinal-diameter vibration conversion underwater acoustic transducer and energy conversion method
  • A periodic structural slotted circular tube longitudinal-diameter vibration conversion underwater acoustic transducer and energy conversion method

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Effect test

Embodiment 1

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

[0035] like figure 2 As shown, the left end longitudinal vibration excitation unit 20 includes a sealing sleeve 8, a piezoelectric ceramic stack 5 and a horn-shaped front cover plate 6 mounted on the screw 2, the sealing sleeve 8 is sleeved on the piezoelectric ceramic stack 5, and the piezoelectric ceramic stack is 5 and the sealing sleeve 8 are located between the left rear cover plate 13 and the horn-shaped front cover plate 6. The piezoelectric ceramic stack 5 is formed by interl...

Embodiment 2

[0037] Example 2: as Figure 4 As shown, in the structure of Embodiment 1, an intermediate longitudinal vibration excitation unit and a slotted round tube are added, and the intermediate longitudinal vibration excitation unit 18 includes a sealing sleeve 8 and a left-end trumpet-shaped front cover plate, a piezoelectric The ceramic stack 5 and the right trumpet-shaped front cover plate, the sealing sleeve 8 is set on the piezoelectric ceramic stack, and the piezoelectric ceramic stack 5 and the sealing sleeve 8 are both located between the left-end trumpet-shaped front cover and the right-end trumpet-shaped front cover. The electric ceramic stack 5 is formed by staggered pressing 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-numbered positions are connected to the middle and negative electrodes. , the electrode pieces at the even-numbered positio...

Embodiment 3

[0038] Example 3: as Figure 5 , In the structure of Example 1, two middle 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 its underwater model can reach 880Hz. When a group of slotted circular tubes and piezoelectric ceramic stacks are added (ie, the structure of Example 2), the characteristic frequency of the underwater model can be reduced to 630 Hz. When two sets of slotted circular tubes and piezoelectric ceramic stacks are added (ie, the structure of Example 3), the characteristic frequency of the underwater model can be reduced to 520 Hz. However, the frequency range of the flat area of ​​the ordinary low-frequency transducer TVR is narrow, so this periodic structure can greatly reduce the characteristic frequency of the transducer and widen the frequency range of stable emission in the flat area. Low frequenc...

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PUM

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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 a longitudinal-diameter vibration conversion underwater acoustic transducer of a grooved circular tube with periodic structure and an energy conversion method. Background technique [0002] In the field of underwater detection technology, low-frequency transducers occupy an important position. 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 have many limitations in practical applications. In response to this problem, many scholars at home and abroad have done related research. Liu Zhenjun et al. developed a cylindrical overflow low-frequency broadband transducer based on tangentially polarized inlaid piezoelectric ceramic rings. The coupling of liquid cavity vibration and radial vibration enables the tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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