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Small-size circumferential-spiral-groove longitudinal-vibration underwater transducer

An underwater acoustic transducer and longitudinal vibration technology, which is applied to transducers used underwater and other directions, can solve the problems of large size of low-frequency transducers, and achieve the effects of reducing vibration frequency and simple structure and manufacturing process.

Active Publication Date: 2017-12-22
SHAANXI NORMAL UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide a small-sized circumferential spiral grooved longitudinal vibration underwater acoustic transducer, which realizes the low-frequency emission of the transducer in the frequency range of 50Hz-1000Hz, and overcomes the relatively small size of the low-frequency transducer in the prior art. big problem

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  • Small-size circumferential-spiral-groove longitudinal-vibration underwater transducer
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  • Small-size circumferential-spiral-groove longitudinal-vibration underwater transducer

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0025] see Figure 1 to Figure 5 , a small-sized circumferential spiral groove longitudinal vibration underwater acoustic transducer, including a transducer body 4, the transducer body 4 includes a rear cover 45, a piezoelectric ceramic stack, and a front cover connected in sequence 48 and front end cutting body 49, front cover plate 48 and front end cutting body 49 materials are aluminum, back cover plate 45 materials are steel, and front cover plate 48 is trumpet shape, and one end that its opening is smaller is connected with piezoelectric ceramic stack, and opening The larger end is connected to the front cutting body 49, and the piezoelectric ceramic stack includes the first electrode sheet, the first piezoelectric ceramic sheet, the second electrode sheet, the second piezoelectric ceramic sheet, and the third electrode sheet connected in series , the third piez...

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Abstract

The invention discloses a small-size circumferential-spiral-groove longitudinal-vibration underwater transducer, which comprises a transducer body. The transducer body comprises a back cover plate, a piezoelectric ceramic stack, a front cover plate and a front-end cutting body, which are connected in sequence. The piezoelectric ceramic stack is formed by piezoelectric ceramic pieces and electrode slices, which are laminated alternately, and the two ends of the piezoelectric ceramic stack are the electrode slices respectively. One end of each piezoelectric ceramic piece is connected to a positive lead wire through the corresponding electrode slice, and the other end thereof is connected to a negative lead wire through the corresponding electrode slice; and the positive lead wire and the negative lead wire are connected to an excitation source. The underwater transducer realizes low-frequency emission within a frequency range of 50 Hz-1000 Hz. Besides, the transducer has the advantages of small overall size, simple structure and manufacture process and low cost.

Description

technical field [0001] The invention belongs to the field of underwater acoustic transducers, in particular to a small-sized circumferential spiral grooved longitudinal vibration underwater acoustic transducer. 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 the transducer operate at a frequency of 3 to 5 kHz With a flat respon...

Claims

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Application Information

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IPC IPC(8): H04R1/44
CPCH04R1/44
Inventor 张光斌邓云云张小凤
Owner SHAANXI NORMAL UNIV
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