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A kind of ultra-low frequency curved disc transducer

A transducer and ultra-low frequency technology, applied in the direction of underwater transducers, etc., can solve the problems such as the inability to realize ultra-low frequency curved disc transducer, reduce the working depth and working voltage, and large volume, etc. The effect of higher power ultra-low frequency emission

Active Publication Date: 2020-06-16
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the design of the curved disk transducer has a lower limit frequency. There are two ways to obtain a lower resonance frequency: 1. The metal disk and piezoelectric ceramics are thinner, which will reduce the working depth and working voltage. Problem; 2. Metal discs and piezoelectric ceramics are large, but the current manufacturing process of piezoelectric ceramics cannot meet the needs of ultra-low frequency curved disc transducers
[0005] To sum up, there is a need for an ultra-low frequency curved disk transducer to solve the shortcomings of traditional ultra-low frequency transducers with large volume

Method used

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  • A kind of ultra-low frequency curved disc transducer
  • A kind of ultra-low frequency curved disc transducer
  • A kind of ultra-low frequency curved disc transducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The invention provides an ultra-low frequency curved disc transducer, which includes a metal disc and a piezoelectric ceramic disc. The feature of this invention is that there are some cylindrical grooves on the outer surface of the metal disc, which are used to bond piezoelectric ceramic discs to realize an inlaid bonding structure, forming a structure similar to a "double stack", where two metal discs are bonded Together to form the overall structure of the transducer, the two "double laminations" flexibly vibrate simultaneously to achieve sound radiation.

[0025] The present invention may also include:

[0026] The ultra-low frequency curved disc transducer is formed by bonding a metal disc and a metal back plate, and a piezoelectric ceramic disc is bonded in a cylindrical groove on the outer surface of the metal disc to realize inlaid bonding structure.

[0027] The ultra-low frequency curved disc transducer is formed by bonding two metal discs, wherein the inner...

Embodiment 2

[0036] Such as figure 2 The first metal disc 2a, the second metal disc 2b, the third metal disc 9a and the fourth metal disc 9b shown are made of aluminum alloy, the cross section is U-shaped, and there are cable holes 3 and wire holes 4. Card slot 5, threaded hole 7.

[0037] Such as image 3 and Figure 4 The outer surfaces of the first metal disc 2a and the second metal disc 2b shown have cylindrical grooves 6 for bonding piezoelectric ceramic discs 1; the third metal disc 9a and the fourth metal disc 9b There are cylindrical grooves 6 on the inner and outer surfaces of the inner and outer surfaces, which are used for bonding piezoelectric ceramic discs 1 .

[0038] Such as Figure 5 It is feasible to use aluminum alloy or steel for the metal back plate 8 shown, and aluminum alloy is thicker than steel.

[0039] The basic steps to realize an ultra-low frequency curved disk transducer are:

[0040] 1. The piezoelectric ceramic disc 1 is treated, mainly to remove the s...

Embodiment 3

[0049] This example Figure 5 As shown, its manufacturing steps are basically the same as in Example 12.

[0050] The difference between this embodiment and Embodiment 2 is that the first metal disc 2a is replaced by a metal back plate 8, which reduces the number of piezoelectric ceramic discs 1 .

[0051] When the transducer works in water, an alternating electric field is applied to the piezoelectric ceramic disc 1. Under the excitation of the alternating electric field, due to the large mass of the metal back plate 8, it is equivalent to being fixed, and the piezoelectric ceramic disc 1 and the second The two metal discs 2b work together to produce bending reciprocating vibration; when the frequency of the alternating signal reaches the resonance frequency of bending vibration, the frequency response curve in water has a maximum value.

[0052] At the same time, since the maximum linear dimension of the transducer is much smaller than the wavelength, the full-space radiation...

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Abstract

The present invention discloses an ultralow frequency bending disc energy converter, and relates to the technical field of an underwater acoustic energy converter. The ultralow frequency bending discenergy converter comprises: piezoelectric ceramics wafers 1, a first metal disc 2a, a second metal disc 2b, a cable wire hole 3, a wire guide 4, a neck 5, column-type grooves 6, a threaded hole 7, a metal back plate 8, a third metal disc 9a and a fourth metal disc 9b; the first metal disc 2a and the second metal disc 2b are cooperated through the neck 5 to ensure coaxiality and form an energy converter housing through splicing, and the piezoelectric ceramics wafers 1 achieve inlaying splicing through the column-type grooves 6; wires are welded to pass through the wire guide 4 to connect with the cable; electrode slices are fixed at the piezoelectric ceramics wafers 1 through the threaded hole 7, and the piezoelectric ceramics wafers 1 are connected with the cable through welding wires; andthe cable is led out through the cable wire hole 3. The small-size piezoelectric ceramics wafers replace large-size piezoelectric ceramics wafers to overcome the defect that a traditional energy converter is large in size.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic transducers, in particular to an ultra-low frequency curved disc transducer. Background technique [0002] Sound waves are the only energy carriers known so far that can travel long distances in seawater. As an underwater acoustic transducer capable of emitting sound waves, it has very important application value whether it is in the civilian field, such as marine geomorphology detection, seabed resource development, etc., or in the military field, such as submarine detection, underwater acoustic communication, etc. [0003] The ultra-low frequency sound source refers to the sound source that emits sound waves below 100Hz. It is used in ocean acoustic tomography, anti-submarine communication, anti-water mine warfare and other fields. Representative ultra-low frequency sound sources include electromotive force transducers and electromagnetic transducers. , Helmertz transducers, etc., b...

Claims

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Application Information

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IPC IPC(8): H04R1/44
CPCH04R1/44
Inventor 周天放蓝宇卢苇袁经文于亮
Owner HARBIN ENG UNIV