CN107452365B - Directional quadrilateral flextensional transducer - Google Patents
Directional quadrilateral flextensional transducer Download PDFInfo
- Publication number
- CN107452365B CN107452365B CN201710580582.9A CN201710580582A CN107452365B CN 107452365 B CN107452365 B CN 107452365B CN 201710580582 A CN201710580582 A CN 201710580582A CN 107452365 B CN107452365 B CN 107452365B
- Authority
- CN
- China
- Prior art keywords
- groups
- excitation
- directional
- quadrilateral
- flextensional transducer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005284 excitation Effects 0.000 claims abstract description 72
- 230000005855 radiation Effects 0.000 claims abstract description 48
- 238000005452 bending Methods 0.000 claims abstract description 29
- 230000007704 transition Effects 0.000 claims abstract description 22
- 239000013078 crystal Substances 0.000 claims description 33
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 23
- 150000002910 rare earth metals Chemical class 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 19
- 239000000919 ceramic Substances 0.000 claims description 12
- 238000011160 research Methods 0.000 abstract description 3
- 238000004891 communication Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 11
- 238000006073 displacement reaction Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000004044 response Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005404 monopole Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/121—Flextensional transducers
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
Abstract
The invention discloses a directional quadrilateral flextensional transducer, which comprises excitation vibrators 1, a radiation shell 2, a central mass block 3 and transition blocks 4, wherein the radiation shell 2 is a closed shell formed by alternately connecting four groups of concave bending beams and four groups of straight beams, the inner walls of the four groups of straight beams are respectively provided with the transition blocks 4, the rear parts of the four groups of transition blocks 4 are respectively connected with two groups of long excitation vibrators and two groups of short excitation vibrators, the two groups of long excitation vibrators and the two groups of short excitation vibrators form a cross driving structure, the four groups of excitation vibrators 1 are mutually vertical, and the other ends of the four groups of excitation vibrators 1 are commonly connected to the central mass block 3; the invention utilizes the asymmetrical radiation surface to match with the asymmetrical excitation mode, so that strong contrast is formed when the front and back opposite radiation surfaces vibrate, thereby realizing cardioid directional emission; the invention has wide application range and can be applied to the fields of low-frequency active sonar, remote communication, ground sound propagation research, marine geological research and the like.
Description
Technical Field
The invention belongs to the technical field of hydroenergy transducers, and particularly relates to a directional quadrilateral flextensional transducer.
Background
The underwater acoustic equipment is important ocean observation equipment, and underwater targets are detected and identified by using information carried by sound waves. The transducer is a key part of the underwater acoustic equipment, and the underwater acoustic equipment realizes the exchange of electric energy and acoustic energy by virtue of the transducer. Transducers fall into two broad categories depending on the operating conditions: a transmitting transducer that converts electromagnetic energy into acoustic energy and a receiving transducer, or hydrophone, that converts acoustic energy into electromagnetic energy. The transmitting transducer converts electromagnetic oscillation energy into mechanical vibration energy, so as to push the aqueous medium to vibrate, convert an electric signal into an acoustic signal transmitted in the sea and radiate acoustic energy; the receiving transducer converts mechanical vibration energy into electromagnetic oscillation energy, converts sound wave signals into electric signals, and sends the electric signals to the display for observation and identification after amplification and processing. Piezoelectric transducers are widely applied in the prior energy converter, and energy conversion between mechanical energy and electric energy is carried out by utilizing the piezoelectric effect and the inverse piezoelectric effect. When some crystals are deformed by external force, electric charges appear on some surfaces of the crystals, so that a piezoelectric effect appears, and the crystals with the piezoelectric effect are called piezoelectric crystals. The piezoelectric effect is reversible, that is, the crystal is deformed under the action of an external electric field, namely, the inverse piezoelectric effect or the inverse piezoelectric effect.
The flextensional transducer is a common underwater acoustic transducer for realizing low-frequency acoustic radiation, and the working principle of the flextensional transducer is that the displacement amplification effect of a flextensional shell is utilized to convert the longitudinal vibration with small amplitude of a driving unit into the bending vibration with large amplitude of the shell, so that the acoustic radiation capability is improved.
The progress of the submarine noise reduction technology enables the submarine covered with the noise reduction tiles to fully absorb medium-high frequency noise, only low-frequency noise is left to be traced and can be circulated, the low-frequency sound wave has the characteristic of small absorption loss, and if the submarine utilizes excellent sound propagation conditions of deep sea sound channels, the propagation distance of the low-frequency sound wave can reach thousands of kilometers, so that in active detection, the adoption of a low-frequency sound source is beneficial to realizing the detection of a target.
The directional transducer can remarkably improve the working distance, the signal-to-noise ratio and the interference, and can directionally transmit information, so that the reliability and the confidentiality of communication are improved, and the research on the low-frequency directional underwater acoustic transducer has important significance.
The cardioid directivity is a relatively typical directivity synthesis result, has been widely applied to microphones, and is usually used in the field of underwater sound when a unidirectional radiation characteristic is required, the most basic cardioid directivity can be formed by superposing equal-amplitude and in-phase vibrations of a monopole and a dipole.
At present, methods for synthesizing heart-shaped directivity by utilizing monopole vibration and dipole vibration apply different voltages to a plurality of groups of excitation oscillators through electric end adjustment, and the method has the defects that a circuit needs to be designed according to the structural characteristics of a transducer, and the complexity of the whole operation process is increased after the change of electric quantity is introduced. Such as Butler et al, developed a type IV flextensional transducer with directivity. The flextensional transducer is driven by two groups of piezoelectric stacks respectively, when two groups of excitations are adjusted to reach a proper phase, the radiating surface of the transducer radiates in a heart-shaped directivity while being fixed, and the circuit in the design is relatively complex and needs to pay special attention to the design of a circuit part. Therefore, it is necessary to provide a transducer which has a simple circuit, is easy to implement, and has good cardioid directivity.
Disclosure of Invention
The invention aims to provide a directional quadrilaterals flextensional transducer which has simple and convenient circuit and easy realization and can realize low-frequency heart-shaped directional emission.
The purpose of the invention is realized as follows:
the invention discloses a directional quadrilateral flextensional transducer, which comprises an excitation vibrator 1, a radiation shell 2, a central mass block 3 and a transition block 4, wherein the excitation vibrator is arranged on the excitation shell; the radiation shell 2 is a closed shell formed by alternately connecting four groups of concave bending beams and four groups of straight beams, transition blocks 4 are respectively arranged on the inner walls of the four groups of straight beams, two groups of long excitation vibrators and two groups of short excitation vibrators are respectively connected behind the four groups of transition blocks 4, the two groups of long excitation vibrators and the two groups of short excitation vibrators form a cross drive structure, the four groups of excitation vibrators 1 are mutually vertical, and the other ends of the four groups of excitation vibrators 1 are jointly connected to the central mass block 3.
For the directional quadrilateral flextensional transducer, rigid connection is adopted between the excitation vibrator 1 and the transition block 4, between the excitation vibrator 1 and the central mass block 3 and between the transition block 4 and the radiation shell 2.
For a directional quadrilateral flextensional transducer, the sum of the lengths of the excitation vibrator 1 and the transition block 4 is larger than the distance between the central mass block 3 and the inner wall of the straight beam of the radiation shell 2.
For a directional quadrilateral flextensional transducer, the excitation vibrator 1 is made of piezoelectric crystal stacks or rare earth giant magnetostrictive materials.
Preferably, when the material used by the excitation vibrator 1 is a piezoelectric crystal stack, the excitation vibrator 1 is a cross-drive structure formed by two long piezoelectric crystal stacks and two short piezoelectric crystal stacks; the piezoelectric crystal stack is formed by bonding N rectangular piezoelectric ceramic plates, wherein N is an even number more than or equal to 2; the rectangular piezoelectric ceramics are polarized in the thickness direction, and an electrode plate is arranged between every two piezoelectric ceramics.
Preferably, when the material used by the excitation vibrator 1 is a rare earth giant magnetostrictive material, the excitation vibrator 1 is a cross drive structure formed by two groups of long rare earth giant magnetostrictive rods and two groups of short rare earth giant magnetostrictive rods; a group of excitation coils 6 are wound on the periphery of the giant magnetostrictive rod 8, and the excitation coils 6 are enclosed in a closed magnetic circuit of the permanent magnetic sheets 7 made of high-permeability materials.
Preferably, the excitation vibrator 1 can also be a cross drive structure formed by matching two groups of round rods made of long rare earth giant magnetostrictive materials with two groups of short piezoelectric crystal stacks.
For a directional quadrilateral flextensional transducer, the radiation shell 2 is of an asymmetric structure, the radians of four groups of concave bending beams are different, the radian of a first concave bending beam 21 is greater than that of a second concave bending beam 22, and the radian of a fourth concave bending beam 24 is greater than that of a third concave bending beam 23.
Preferably, the thicknesses of the second straight beam wall 12 and the third straight beam wall 13 in the radiation housing 2 are greater than those of the first straight beam wall 11 and the fourth straight beam wall 14, and the thicknesses of the four groups of concave curved beams are the same.
Preferably, the thickness value of the first concave bending beam 21 in the radiation housing 2 is greater than that of the second concave bending beam 22, the fourth concave bending beam 24 is greater than that of the third concave bending beam 23, the single concave bending beam is of an equal-thickness structure, and four groups of straight beams are designed to have equal thicknesses.
The invention has the beneficial effects that: the directional quadrilateral flextensional transducer disclosed by the invention utilizes the asymmetric radiating surfaces and an asymmetric excitation mode to form strong contrast when the front and back opposite radiating surfaces vibrate, thereby realizing the heart-shaped directional emission; by using the asymmetry of the shell instead of the change of the excitation mode to form the heart-shaped directivity, the low-frequency radiation effect can be amplified, and the excitation energy of the transducer can be saved.
Drawings
FIG. 1 is a schematic diagram of a directional quadrilaterals flextensional transducer of the present invention;
FIG. 2 is a schematic diagram of the present invention for implementing directional emission in cardioid form;
FIG. 3 is a dipole-like mode diagram compared to a symmetric quadrilaterals flextensional transducer dipole mode diagram;
FIG. 4 is a schematic structural view of a directional quadrilaterals flextensional transducer in which an excitation vibrator adopts two groups of long piezoelectric crystal stacks and two groups of short piezoelectric crystal stacks to be driven in a cross manner;
FIG. 5 is a schematic structural view of a directional quadrilaterals flextensional transducer in which an excitation vibrator is driven by two groups of long rare earth giant magnetostrictive rods and two groups of short rare earth giant magnetostrictive rods in a crossed manner;
FIG. 6 is a schematic structural view of a directional quadrilaterals flextensional transducer in which an excitation vibrator adopts two groups of long rare earth giant magnetostrictive rods and two groups of short piezoelectric crystal stacks for cross drive;
FIG. 7 is a schematic structural view of a directional quadrilateral flextensional transducer of the radiation housing of the present invention, which is designed by alternately connecting two groups of thick straight beams with two groups of thin straight beams and four groups of bending beams;
FIG. 8 is a schematic structural view of a directional quadrilateral flextensional transducer in which four bending beams with different thicknesses are adopted in the radiation housing of the invention;
FIG. 9 is a test chart of response curves of the main radiating surface and the opposite radiating surface of the present invention;
FIG. 10 is a graph of finite element simulation and experimental test directivity comparison of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The working principle of the directional quadrilateral flextensional transducer disclosed by the invention is as follows:
referring to fig. 2, for the quadrilateral flextensional transducer, the vibration displacement amplitude value of each radiation surface in the monopole vibration state is set to be a, the vibration displacement amplitude values of two opposite radiation surfaces in the dipole vibration state are respectively b and-b (the negative sign represents that the normal direction of the radiation surface is opposite), the displacements of the other two surfaces are 0, the final superposition effect is that the displacement value of the main radiation surface reaches a + b, both sides are a, and the displacement value of the direction opposite to the main radiation surface is a-b. Therefore, when the displacement amplitudes of the front and rear radiating surfaces are different by 2b and reflected in the sound field, which means that the sound pressure amplitudes in all directions of the far field have certain difference, the standard cardioid directivity can be obtained, and the shape of the directivity can be correspondingly changed along with the change of a and b.
Referring to fig. 3, fig. 2 is a comparison diagram of the dipole mode of the quasi-dipole mode of the present invention and the dipole mode of the symmetric quadrilaterals flextensional transducer, and the left diagram is the dipole mode of the symmetric quadrilaterals flextensional transducer, which does not act on the radiation sound field of the transducer because the two main radiation surfaces generate sound fields with similar displacement and opposite phases. The right figure is a dipole-like mode figure of the invention, and because the invention adopts the design of combining the asymmetric structure of the radiation shell and the asymmetric excitation oscillator, the vibration displacement generated by the main radiation surface is far larger than the vibration displacement generated by the opposite radiation surface, and the radiation sound fields of the main radiation surface and the asymmetric excitation oscillator cannot be completely offset, the dipole-like mode of the invention has an effect on the radiation sound field, and the directive emission is realized.
Example 1
With reference to fig. 1, the invention discloses a directional quadrilateral flextensional transducer, which comprises an excitation vibrator 1, a radiation shell 2, a central mass block 3 and a transition block 4; the radiation shell 2 is a closed shell formed by alternately connecting four groups of concave bending beams and four groups of straight beams, transition blocks 4 are respectively arranged on the inner walls of the four groups of straight beams, two groups of long excitation vibrators and two groups of short excitation vibrators are respectively connected behind the four groups of transition blocks 4, the two groups of long excitation vibrators and the two groups of short excitation vibrators form a cross drive structure, the four groups of excitation vibrators 1 are mutually vertical, and the other ends of the four groups of excitation vibrators 1 are jointly connected to the central mass block 3.
Referring to fig. 4, the material of the excitation vibrator in this embodiment is a piezoelectric crystal stack. The piezoelectric crystal stack 1 is formed by bonding N rectangular piezoelectric ceramic pieces, wherein N is an even number larger than or equal to 2, the rectangular piezoelectric ceramic pieces are polarized in the thickness direction, an electrode piece is arranged between every two piezoelectric ceramic pieces to weld a lead, and the electrode pieces are made of red copper materials. The piezoelectric ceramic plates are connected in parallel, and the piezoelectric ceramic plates and the metal sheets are alternately bonded one by epoxy resin to form the driving element. In the present embodiment, the excitation vibrators have four groups, including two long piezoelectric crystal stacks and two short piezoelectric crystal stacks. The sum of the lengths of the piezoelectric crystal stacks 1 and the transition blocks 4 is greater than the distance between the central mass block 3 and the inner wall of the corresponding straight beam, the radiation shell 2 is deformed in advance, the piezoelectric crystal stacks 1 and the transition blocks are fixed between the corresponding straight beams and the central mass block 3 by utilizing pressure generated by increasing the distance between the inner wall of the corresponding straight beam and the central mass block 3, and the piezoelectric crystal stacks 1 are rigidly connected with the transition blocks and the central mass block 3.
When the transducer works, an alternating current load is applied to the piezoelectric crystal stack 1, the piezoelectric ceramic has a piezoelectric effect, so that the piezoelectric crystal stack 1 generates longitudinal stretching vibration, and the bending vibration of the radiation shell 2 is excited through mechanical coupling with the radiation shell 2. The directional emission of the transducer is realized by the structural asymmetry of the radiation housing 2 and the asymmetry of the excitation vibrator.
In this embodiment, the excitation vibrator 1 may be made of other ferroelectric materials or antiferroelectric materials besides the piezoelectric crystal stack.
In this embodiment, four bending beams of the radiation housing 2 are designed to have equal thickness, and four straight beams are designed to have equal thickness.
The central mass block 3 in this embodiment is a rectangular parallelepiped formed by processing aluminum alloy.
The radiation housing 2 and the central mass block 3 in this embodiment may be made of stainless steel, titanium alloy, glass fiber, or carbon fiber, in addition to aluminum alloy.
The directional quadrilateral flextensional transducer in the embodiment can adopt an overflow structure besides adopting a cover plate for sealing.
Example 2
The same as in example 1, except that:
with reference to fig. 5, the excitation vibrator 1 in this embodiment is a rare earth giant magnetostrictive rod 8 made of a rare earth giant magnetostrictive material, a group of excitation coils 6 are wound around the periphery of the rare earth giant magnetostrictive rod 8, the excitation coils 6 are enclosed in a closed magnetic circuit of a permanent magnetic sheet 7 made of a high magnetic conductivity material, and the sum of the lengths of the rare earth giant magnetostrictive rod 8 and the transition block is greater than the distance between the central mass block 3 and the inner wall of the corresponding straight beam. The rare earth giant magnetostrictive rod 8 is fixed between the inner wall of the straight beam and the central mass block 3 by increasing the pressure generated by increasing the distance between the inner wall of the corresponding straight beam and the central mass block 3, and the rare earth giant magnetostrictive rod 8 is rigidly connected with the inner wall of the straight beam and the central mass block 3.
Example 3
The same as in example 1, except that:
referring to fig. 6, the excitation vibrator 1 in this embodiment is a piezoelectric crystal stack and a rare earth giant magnetostrictive rod 8, and the lengths of the two groups of rare earth giant magnetostrictive rods 8 are greater than the lengths of the two groups of piezoelectric crystal stacks.
The excitation vibrator 1 in this embodiment may be configured by a piezoelectric crystal stack and a rare earth giant magnetostrictive rod, and may also be configured by a round rod made of other ferroelectric materials or antiferroelectric materials and rare earth giant magnetostrictive materials.
Example 4
The same as in example 1, except that:
referring to fig. 7, in the present embodiment, the thicknesses of the second straight beam wall 12 and the third straight beam wall 13 of the radiation housing 2 are greater than the thicknesses of the first straight beam wall 11 and the fourth straight beam wall 14, and the thicknesses of the four sets of concave curved beams are the same.
The excitation vibrator in this embodiment may be in the form of the excitation vibrator in embodiment 1, 2 or 3.
Example 5
The same as example 4, except that:
referring to fig. 8, in the present embodiment, the first concave curved beam 21 of the radiation housing 2 has a thickness value greater than that of the second concave curved beam 22, and the fourth concave curved beam 24 is greater than that of the third concave curved beam 23, and the single concave curved beam has an equal thickness structure, and four sets of straight beams adopt an equal thickness design.
It should be noted that, by testing and simulating the directional quadrilateral flextensional transducer disclosed by the present invention, the following test results are obtained:
referring to fig. 9, a test chart of response curves of the main radiating surface direction and the opposite radiating surface is shown, wherein a solid line represents a response curve of the main radiating surface direction, and a dotted line represents a response curve of the main radiating surface opposite to the main radiating surface. At a certain frequency point, a pit appears on a response curve in the direction opposite to the main radiation surface, and no pit exists on the corresponding main radiation surface response curve at the frequency point, and the response value is much larger, so that directional emission is realized at the frequency point.
Referring to fig. 10, a finite element simulation and experimental test directivity comparison diagram of the present invention is shown. The solid line represents finite element simulation results, and the dotted line represents experimental test results. The difference value between the maximum value and the minimum value of the test result is 12dB, compared with the simulation result, the pattern and fluctuation of the directivity pattern have certain difference, but the overall trend is the same, and the heart-shaped directivity is obtained.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A directive quadrilateral flextensional transducer is characterized in that: the device comprises an excitation vibrator (1), a radiation shell (2), a central mass block (3) and a transition block (4); the radiation shell (2) is a closed shell formed by alternately connecting four groups of concave bending beams and four groups of straight beams, transition blocks (4) are respectively installed on the inner walls of the four groups of straight beams, two groups of long excitation vibrators and two groups of short excitation vibrators are respectively connected behind the four groups of transition blocks (4), the two groups of long excitation vibrators and the two groups of short excitation vibrators form a cross driving structure, the four groups of excitation vibrators (1) are mutually vertical, and the other ends of the four groups of excitation vibrators (1) are commonly connected to the central mass block (3).
2. A directional quadrilateral flextensional transducer as claimed in claim 1, in which: the excitation vibrator (1) and the transition block (4), the excitation vibrator (1) and the central mass block (3) and the transition block (4) and the radiation shell (2) are in rigid connection.
3. A directional quadrilateral flextensional transducer as claimed in claim 1, in which: the sum of the lengths of the excitation vibrator (1) and the transition block (4) is larger than the distance between the central mass block (3) and the inner wall of the straight beam of the radiation shell (2).
4. A directional quadrilateral flextensional transducer as claimed in claim 1, in which: the excitation vibrator (1) is made of piezoelectric crystal stacks or rare earth giant magnetostrictive materials.
5. A directional quadrilateral flextensional transducer according to claim 1 or 4, characterised in that: when the excitation vibrator (1) is made of piezoelectric crystal stacks, the excitation vibrator (1) is a cross drive structure formed by two groups of long piezoelectric crystal stacks and two groups of short piezoelectric crystal stacks; the piezoelectric crystal stack is formed by bonding N rectangular piezoelectric ceramic plates, wherein N is an even number more than or equal to 2; the rectangular piezoelectric ceramics are polarized in the thickness direction, and an electrode plate is arranged between every two piezoelectric ceramics.
6. A directional quadrilateral flextensional transducer according to claim 1 or 4, characterised in that: when the excitation vibrator (1) is made of a rare earth giant magnetostrictive material, the excitation vibrator (1) is a cross drive structure formed by matching two groups of long rare earth giant magnetostrictive rods with two groups of short rare earth giant magnetostrictive rods; a group of exciting coils (6) are wound on the periphery of the super magnetostrictive rod (8), and the exciting coils (6) are enclosed in a closed magnetic circuit of permanent magnet sheets (7) made of high-permeability materials.
7. A directional quadrilateral flextensional transducer according to claim 1 or 4, characterised in that: the excitation vibrator (1) can also be a cross drive structure formed by matching two groups of long rare earth giant magnetostrictive material round rods with two groups of short piezoelectric crystal stacks.
8. A directional quadrilateral flextensional transducer as claimed in claim 1, in which: the radiation shell (2) is of an asymmetric structure, four groups of concave bending beams have different radians, the radian of a first concave bending beam (21) is larger than that of a second concave bending beam (22), and the radian of a fourth concave bending beam (24) is larger than that of a third concave bending beam (23).
9. A directional quadrilateral flextensional transducer as claimed in claim 1, in which: the thicknesses of a second straight beam wall (12) and a third straight beam wall (13) in the radiation shell (2) are larger than those of a first straight beam wall (11) and a fourth straight beam wall (14), and the thicknesses of the four groups of concave bent beams are the same.
10. A directional quadrilateral flextensional transducer as claimed in claim 1, in which: the thickness value of a first concave bending beam (21) in the radiation shell (2) is larger than that of a second concave bending beam (22), a fourth concave bending beam (24) is larger than that of a third concave bending beam (23), a single concave bending beam is of an equal-thickness structure, and four groups of straight beams are designed to be equal in thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710580582.9A CN107452365B (en) | 2017-07-17 | 2017-07-17 | Directional quadrilateral flextensional transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710580582.9A CN107452365B (en) | 2017-07-17 | 2017-07-17 | Directional quadrilateral flextensional transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107452365A CN107452365A (en) | 2017-12-08 |
| CN107452365B true CN107452365B (en) | 2020-09-11 |
Family
ID=60489007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710580582.9A Active CN107452365B (en) | 2017-07-17 | 2017-07-17 | Directional quadrilateral flextensional transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107452365B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112584271A (en) * | 2020-11-23 | 2021-03-30 | 海鹰企业集团有限责任公司 | Method for electrically exciting directional beam of transducer |
| CN112630754A (en) * | 2020-11-24 | 2021-04-09 | 海鹰企业集团有限责任公司 | Transducer directional beam generating device, detection system and detection method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5126979A (en) * | 1991-10-07 | 1992-06-30 | Westinghouse Electric Corp. | Variable reluctance actuated flextension transducer |
| CN1939605A (en) * | 2005-09-30 | 2007-04-04 | 中国科学院声学研究所 | Piston energy exchanger |
| CN101964185A (en) * | 2010-09-03 | 2011-02-02 | 哈尔滨工程大学 | Ultra-wideband underwater acoustic transducer |
| CN103646643A (en) * | 2013-11-28 | 2014-03-19 | 北京信息科技大学 | A flextensional transducer using a PVDF piezoelectric film |
| CN104056770A (en) * | 2014-06-07 | 2014-09-24 | 杭州电子科技大学 | Sound wave energy converter with directivity |
| CN106558301A (en) * | 2016-11-17 | 2017-04-05 | 哈尔滨工程大学 | Low frequency directivity underwater acoustic transducer |
-
2017
- 2017-07-17 CN CN201710580582.9A patent/CN107452365B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5126979A (en) * | 1991-10-07 | 1992-06-30 | Westinghouse Electric Corp. | Variable reluctance actuated flextension transducer |
| CN1939605A (en) * | 2005-09-30 | 2007-04-04 | 中国科学院声学研究所 | Piston energy exchanger |
| CN101964185A (en) * | 2010-09-03 | 2011-02-02 | 哈尔滨工程大学 | Ultra-wideband underwater acoustic transducer |
| CN103646643A (en) * | 2013-11-28 | 2014-03-19 | 北京信息科技大学 | A flextensional transducer using a PVDF piezoelectric film |
| CN104056770A (en) * | 2014-06-07 | 2014-09-24 | 杭州电子科技大学 | Sound wave energy converter with directivity |
| CN106558301A (en) * | 2016-11-17 | 2017-04-05 | 哈尔滨工程大学 | Low frequency directivity underwater acoustic transducer |
Non-Patent Citations (2)
| Title |
|---|
| "A New type flextensional transducer";Yulan;《ResearchGate》;20131231;全文 * |
| "四边型弯张换能器特性研究及宽带设计";李宽;《声学学报》;20161130;第41卷(第6期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107452365A (en) | 2017-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101964185B (en) | Ultra-wideband underwater acoustic transducer | |
| CN101998201B (en) | Folding cover plate broadband underwater transducer | |
| CN106558301B (en) | Low-frequency directional underwater acoustic transducer | |
| CN102169685A (en) | Small sized deepwater underwater sound energy transducer with low frequency and broad band | |
| CN108435523B (en) | Water drop type flextensional transducer | |
| KR20100010778A (en) | Sound wave generator for the application of the parametric array | |
| CN102136268A (en) | Bent piezoelectric-ceramic low-frequency underwater acoustic transducer | |
| CN107452365B (en) | Directional quadrilateral flextensional transducer | |
| US2741754A (en) | Disk transducer | |
| CN110277485B (en) | Composite material laminated bending vibration element and preparation method thereof | |
| CN103489440A (en) | Broadband oscillator cross drive underwater acoustic transducer | |
| CN112443320A (en) | Remote detection dipole logging transducer | |
| CN110639784B (en) | Low-frequency narrow-beam transducer, transduction method and application | |
| CN202042174U (en) | Zigzag piezoelectric-ceramic low-frequency underwater acoustic transducer | |
| Boucher | Trends and problems in low frequency sonar projectors design | |
| Massa | An overview of electroacoustic transducers | |
| CN102748013B (en) | Low-frequency dipole transmitting transducer | |
| CN109225788B (en) | High-efficiency broadband air-medium ultrasonic transducer with double-phonon crystal composite structure | |
| US20200128333A1 (en) | Diagonal resonance sound and ultrasonic transducer | |
| CN201878311U (en) | Wideband underwater acoustic transducer with foldable cover plates | |
| Butler | A directional dogbone flextensional transducer | |
| CN107403616B (en) | Low-frequency frame driving type quadrilateral flextensional transducer | |
| CN107274877B (en) | Phase inversion type deep sea bending and stretching underwater acoustic transducer | |
| US20190272816A1 (en) | Hybrid transducer apparatus and methods of manufacture and use | |
| CN211448666U (en) | Remote detection dipole logging transducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |