CN107293283A - A kind of super surface of acoustics and sound wave focusing arrangement - Google Patents
A kind of super surface of acoustics and sound wave focusing arrangement Download PDFInfo
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- CN107293283A CN107293283A CN201710452220.1A CN201710452220A CN107293283A CN 107293283 A CN107293283 A CN 107293283A CN 201710452220 A CN201710452220 A CN 201710452220A CN 107293283 A CN107293283 A CN 107293283A
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- 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
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
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- 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
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/36—Devices for manipulating acoustic surface waves
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Abstract
The invention provides a kind of super surface of acoustics and sound wave focusing arrangement, the super surface of acoustics includes：Multiple first structure units and multiple second construction units, multiple first structure units are connected with each other and in the same plane with multiple second construction units, the phase-delay difference of the outgoing sound wave of first structure unit and the second construction unit is 180 degree, and first structure unit and the second construction unit have identical transmissivity to incident acoustic wave；First structure unit and the second construction unit include respectively：Multiple rectangular preiections are evenly arranged with the upper flat plate and lower flat board of integral type connection, the lower surface of upper flat plate；The centre of two adjacent rectangular preiections on upper flat plate is provided with the first gap, lower flat board and is provided with the second gap.The present invention can realize the function to different sound wave regulations by adjusting the arrangement mode or distributing order of the super surface cell of acoustics.
Description
Technical field
The present invention relates to acoustical material technical field, in particular to a kind of super surface of acoustics and sound wave focusing arrangement.
Background technology
In recent years, emerging in an endless stream with various acoustical devices, only can not using only the acoustic characteristic of traditional material
The growth requirement of acoustical device is met, and then the increasing acoustical device that appears in the super surface of acoustics (Meta Materials) manufactures skill
Art field, the super surface of acoustics has special acoustic characteristic, and the super surface of acoustics disclosure satisfy that the thin list of the thickness using sub-wavelength
Face reaches the regulation and control to sound wave, but the structure composition unit on the super surface of existing acoustics can not be accomplished to make the production of incident acoustic wave
The difference change of raw phase delay is consistent, and enters the regulation and control for being unable to more efficient, flexible progress to incident acoustic wave.
The content of the invention
In view of this, the purpose of the embodiment of the present invention is to provide a kind of super surface of acoustics and sound wave focusing arrangement, to solve
Certainly above mentioned problem.
In a first aspect, the embodiments of the invention provide a kind of super surface of acoustics, the super surface of the acoustics includes：
Multiple first structure units and multiple second construction units, multiple first structure units and multiple described second
Construction unit is connected with each other and in the same plane, the outgoing sound wave of the first structure unit and second construction unit
Phase-delay difference be 180 degree, the first structure unit has identical saturating incident acoustic wave with second construction unit
Penetrate rate；
The first structure unit and second construction unit include respectively：Upper flat plate, lower flat board, the first side wall and
Two side walls, formula structure is connected as one between the upper flat plate and lower flat board by the first side wall and second sidewall, described flat
Multiple rectangular preiections are evenly arranged with the lower surface of plate；
The centre of two adjacent rectangular preiections on the upper flat plate is provided with correspondence on the first gap, the lower flat board
The centre position of two adjacent rectangular preiections is provided with the second gap；
It is convex that a rectangle is separated between first gap and second gap of the first structure unit
Rise；
It is convex that three rectangles are separated between first gap and second gap of second construction unit
Rise.
With reference to first aspect the embodiments of the invention provide the possible embodiment of the first of first aspect, wherein：
Five rectangular preiections are evenly arranged with the upper flat plate, so that the first structure unit and second structure
Unit six cavity type structures of formation.
With reference to the first possible embodiment of first aspect, the embodiment of the present invention additionally provides the second of first aspect
Possible embodiment is planted, wherein：
Three rectangular preiections are evenly arranged with the upper flat plate, so that the first structure unit and second structure
Unit is four cavity type structures.
With reference in a first aspect, the present invention implement in provide first aspect the third possible embodiment, wherein：
The first structure unit is identical with the size of second construction unit, the upper flat plate of the first structure unit
Thickness, lower slab-thickness, the size of rectangular preiection, the first gap width, the second gap width respectively with the second structure list
The upper flat plate thickness of member, lower slab-thickness, the size of rectangular preiection, the first gap width, the width correspondence in the second gap are identical.
With reference in a first aspect, the present invention implement in provide first aspect the 4th kind of possible embodiment, wherein：
The cross-sectional length perpendicular to first gap of the first structure unit and second construction unit is L,
The first structure unit and the gross thickness of second construction unit, upper flat plate thickness, lower slab-thickness, the width in the first gap
Degree is in proportionate relationship with the length L with the width in the second gap and the size of rectangular preiection.
With reference to the first possible embodiment of first aspect, the embodiments of the invention provide the 5th of first aspect kind
Possible embodiment, wherein：
The cross-sectional length perpendicular to first gap of the first structure unit and second construction unit is L,
The gross thickness H of the gross thickness of the first structure unit and second construction unit is：H=6L/31, the upper flat plate with
The thickness h of the lower flat board is：H=5L/124；The width w in first gap and second gap is：W=L/31；Institute
The width a for stating rectangular preiection is：A=2L/31, the height b of the rectangular preiection is b=3L/31.
With reference to the 5th kind of possible embodiment of first aspect, the embodiments of the invention provide the 6th of first aspect kind
Possible embodiment, wherein：
Spacing p is between described two rectangular preiections：P=5L/31.
With reference to second of possible embodiment of first aspect, the embodiments of the invention provide the 7th of first aspect kind
Possible embodiment, wherein：
The cross-sectional length perpendicular to first gap of the first structure unit and second construction unit is L,
The gross thickness H of the gross thickness H of the first structure unit and second construction unit is：H=2L/7；The upper flat plate
Thickness h and the thickness h of the lower flat board are：H=5L/84；The width w in first gap and second gap is：W=
1L/21；The width a of the rectangular preiection is：A=2L/21, the height b of the rectangular preiection is b=3L/21.
With reference to the 7th kind of possible embodiment of first aspect, the embodiments of the invention provide the 8th of first aspect kind
Possible embodiment, wherein：
Spacing p is between described two rectangular preiections：P=5L/21.
Second aspect, the embodiments of the invention provide a kind of sound wave focusing arrangement, including any of the above-described possible realization side
The super surface of acoustics described in formula, described device includes core and periphery, multiple the second of the super surface of acoustics
Construction unit connects and composes the core of described device, the first structure unit and the second construction unit on the super surface of acoustics
It is spaced the outer part for constituting described device.
The super surface of a kind of acoustics provided in an embodiment of the present invention and sound wave focusing arrangement, the super surface of acoustics is by first structure list
Member and the second construction unit composition, due to first structure unit and the cavity and gap structure of the second construction unit so that first
The phase-delay difference of the incident acoustic wave of construction unit and the second construction unit is 180 degree, by the first structure unit and the second knot
The phase of different incident acoustic waves can be adjusted for the super surface of structure unit composition, under different arrangement modes, the first knot
Structure unit is different therewith to the reflected phase of incident acoustic wave from the second construction unit, can be by setting different arrangement modes real
Now carry out to the more effective regulation and control of sound wave, such as the directed radiation of sound wave, focus on etc..
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore is not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 a show a kind of structural representation on the super surface of acoustics that the embodiment of the present invention one is provided；
Fig. 1 b show that a kind of structure of the first structure unit on the super surface of acoustics that the embodiment of the present invention one is provided is shown
It is intended to；
Fig. 1 c show that a kind of structure of second construction unit on the super surface of acoustics that the embodiment of the present invention one is provided is shown
It is intended to；
Fig. 2 a show first structure unit and the second construction unit that the embodiment of the present invention one provided to incident acoustic wave
Transmissivity relation schematic diagram；
Fig. 2 b show first structure unit and the second construction unit that the embodiment of the present invention one provided to incident acoustic wave
Phase difference schematic diagram；
Fig. 2 c show the velocity field v of the first structure unit that the embodiment of the present invention one provided and the second construction unity
Distribution map；
Fig. 2 d show the velocity field v of the first structure unit that the embodiment of the present invention one provided and the second construction unitx
Distribution map；
Fig. 2 e show the first gap of the four cavity type structures that the embodiment of the present invention one is provided and the position in the second gap
Put schematic diagram；
Fig. 2 f show the first gap of the six cavity type structures that the embodiment of the present invention one is provided and the position in the second gap
Put schematic diagram；
Fig. 2 g show the first structure unit and the second structure for the four cavity type structures that the embodiment of the present invention one is provided
Relation schematic diagram of the unit to the transmissivity of incident acoustic wave；
Fig. 2 h show the first structure unit and the second structure for the four cavity type structures that the embodiment of the present invention one is provided
The relation schematic diagram of the phase of the incident acoustic wave of unit；
Fig. 3 a show the difference of a kind of first structure unit that the embodiment of the present invention one provided and the second construction unit
The effect schematic diagram that arrangement mode is produced；
Fig. 3 b show another first structure unit and the second construction unit that the embodiment of the present invention one provided not
The effect schematic diagram produced with arrangement mode；
Fig. 3 c show another first structure unit and the second construction unit that the embodiment of the present invention one provided not
The effect schematic diagram produced with arrangement mode；
Fig. 4 shows a kind of structural representation for sound wave focusing arrangement that the embodiment of the present invention two is provided；
Reference：The gaps of 10- first；20- upper flat plates；30- rectangular preiections；Flat board under 40-；The gaps of 50- second；60-
First structure unit；The construction units of 70- second；80- the first side walls；90- second sidewalls.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
Middle accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
It is a part of embodiment of the invention, rather than whole embodiments.The present invention being generally described and illustrated herein in the accompanying drawings is real
Applying the component of example can be arranged and be designed with a variety of configurations.Therefore, it is of the invention to what is provided in the accompanying drawings below
The detailed description of embodiment is not intended to limit the scope of claimed invention, but is merely representative of the selected reality of the present invention
Apply example.Based on embodiments of the invention, the institute that those skilled in the art are obtained on the premise of creative work is not made
There is other embodiment, belong to the scope of protection of the invention.
At present, the super surface of acoustics is more and more applied in the manufacture field of acoustical device, and the super surface of acoustics is one
Planting has certain special acoustic properties, the entity different from common material, the structure composition unit on the existing super surface of acoustics
It can not accomplish to be consistent the change of the phase-delay difference of incident acoustic wave, enter to be unable to more efficient, flexible progress pair
The regulation and control of sound wave；Based on this, the embodiments of the invention provide a kind of super surface of acoustics and sound wave focusing arrangement.
Carry out that the present invention is discussed in detail below by specific embodiment；
Embodiment one
A kind of super surface of acoustics is provided in embodiment shown in reference picture 1a, the present embodiment, the super surface of the acoustics includes：
Multiple first structure units 60 and multiple second construction units 70, the plurality of first structure unit and the plurality of second construction unit
It is connected with each other, arbitrary arrangement can be carried out, in approximately the same plane, the further first structure unit and first structure list
Be connected with each other between member, between first structure unit and the second construction unit or the second construction unit and the second construction unit it
It is connected with each other, described connected mode can be bonding, the outgoing sound wave of the construction unit 70 of first structure unit 60 and second
Phase-delay difference be 180 degree；
Shown in reference picture 1b and Fig. 1 c, the construction unit 70 of first structure unit 60 and second includes respectively：Upper flat plate 20, under
Flat board 40, the first side wall 80 and second sidewall 90, the first side wall 80 are located at the left side of first structure unit and the second construction unit,
Second sidewall 90 is located at the right side of first structure unit and the second construction unit, and first structure unit and the second construction unit pass through
The first side wall and second sidewall are connected as one on formula structure, the lower surface of upper flat plate and are evenly arranged with multiple rectangular preiections
30；Cavity is formed between two adjacent rectangular preiections；
The centre position of two adjacent rectangular preiections on upper flat plate is provided with 40 correspondences on the first gap 10, lower flat board
The second gap 50 is provided between two adjacent rectangular preiections；
A rectangular preiection 30 is separated between the first gap 10 and the second gap 50 of first structure unit 60；
Three rectangular preiections 30 are separated between the first gap 10 and the second gap 50 of second construction unit 70；
Second gap is sound wave incident gap, and the first gap is sound wave outgoing gap；Above-mentioned first structure unit with it is above-mentioned
Second construction unit can make the phase-delay difference of outgoing sound wave remain 180 degree.
In the present embodiment, five rectangles are evenly arranged with the upper flat plate of first structure unit and the second construction unit convex
Rise, cavity is formed between adjacent rectangle is raised so that first structure unit and the second construction unit are six cavity type structures, reference
Shown in Fig. 1 b, the first gap 10 of first structure unit 60 can be disposed on from left side the 3rd rectangular preiection and the 4th
On upper flat plate between rectangular preiection, the second gap 50 of first structure unit 60 is positioned corresponding to the second rectangle from left side
On lower flat board 40 between raised and the 3rd rectangular preiection, a rectangle is separated by between first gap and the second gap convex
Rise.
Further, shown in reference picture 1c, the first gap 10 of above-mentioned second construction unit 70 is located at upper flat plate from left side
Rise between the 3rd rectangular preiection and the 4th rectangular preiection, the second gap 50 of the second construction unit 70 is right on lower flat board
Should be in the left side of the first rectangular preiection.
Above-mentioned first structure unit is identical with the position in the first gap of the second construction unit, above-mentioned first structure unit
Second gap is different from the position in the second gap of the second construction unit, and first structure unit is being arranged with the second construction unit
The first gap of first structure unit is set to be located at the first gap of the second construction unit on straight line during row；The present embodiment
In, first structure unit and the second construction unit have similar internal structure so that with the second machine inside first structure unit
Include same resonance mode inside structure unit, while setting makes the first structure unit be adopted with second construction unit
With the material with identical refractive index, first structure unit is set to have identical saturating incident acoustic wave with second construction unit
Rate is penetrated, and then causes the transmitted wave of first structure unit and the second construction unit that there is consistent amplitude, and first structure list
Second gap of member is located at the diverse location of lower flat board with the second gap of the second construction unit, when incident acoustic wave enters the second seam
There is identical phase during gap, different phases, first structure unit and the second structure are had when from outgoing at the first gap
Unit postpones the phase of incident acoustic wave, and first structure unit and the second construction unit are when making incident acoustic wave outgoing
Phase-delay difference is 180 degree, overcomes traditional Meta Materials phase difference under bandwidth and changes inconsistent and inconsistent amplitude lack
Point, and then the super surface of acoustics provided in the embodiment of the present invention has more practicality relative to traditional Meta Materials.
It should be noted that above are only for example, on the upper flat plate of first structure unit and the second construction unit
The position in one gap is not limited to a kind of above-mentioned set-up mode, accordingly, and upper flat plate is worked as nor fixed in the position in the second gap
On when being provided with five rectangular preiections, first structure unit and the second mechanism unit are six cavity type structures, first structure list
First gap of member and the position in the second gap only need to be separated with a rectangular preiection, the second structure list between satisfaction makes therebetween
The first gap and the second gap of member only need to be separated with three rectangular preiections between satisfaction makes therebetween；With six cavity structures
First structure unit and the second construction unit have the beneficial effect that：With more consistent transmission peaks and phase difference.
More stable and more convenient for the regulation and control to sound wave for the performance that is reached above-mentioned super surface, setting makes above-mentioned
First structure unit is identical with the size of above-mentioned second construction unit, the upper flat plate thickness of first structure unit and the second structure list
The upper flat plate thickness of member is identical, the lower slab-thickness of above-mentioned first structure unit and the lower slab-thickness phase of the second construction unit
Together, the size of the rectangular preiection of above-mentioned first structure unit is identical with the size of the rectangular preiection of the second construction unit, and above-mentioned
First gap width of one construction unit is identical with the first gap width of the second construction unit, and the of above-mentioned first structure unit
Two gap widths are identical with the width in the second gap of the second construction unit；First structure unit and the second construction unit head and the tail phase
Company forms the super surface of whole acoustics；
Further, the section perpendicular to the first gap and the second gap of first structure unit and the second construction unit
Length is L, first structure unit gross thickness, upper flat plate thickness, lower slab-thickness, the width in the first gap and the width in the second gap
The size of degree and rectangular preiection is in proportionate relationship, accordingly, the gross thickness of the second construction unit, upper flat plate with length L
Thickness, lower slab-thickness, the width in the first gap and the width in the second gap and rectangular preiection size also with above-mentioned length L
In proportionate relationship.
As preferred, the gross thickness H of above-mentioned first structure unit and the gross thickness H of the second construction unit are：H=
6L/31, the thickness h of upper flat plate and the thickness h of lower flat board are：H=5L/124；
The width w in above-mentioned first gap and the second gap is：W=L/31；
Further, the width a of above-mentioned rectangular preiection is：A=2L/31, the height b of rectangular preiection is b=3L/31；
Further, spacing between two rectangular preiections (or formed between two adjacent rectangular preiections it is recessed
The width of groove) p is：P=5L/31.
Preferably, the length L in the section perpendicular to the first gap for making first structure unit and the second construction unit is set
For：L=6.2 centimetres, now corresponding working frequency be 4453HZ, the frequency heard positioned at human ear, available for the acoustics of speech,
Muscial acoustics, room acoustics and Noise measarement.
Embodiment shown in reference picture 2a, Fig. 2 b, first structure unit and the second construction unit are in whole working frequency model
The transmission amplitude of transmitted acoustic pulse in enclosing is consistent, and phase difference remains 180 degree；Amplitude result shows that one is positioned at wavelength
Transmission peaks during 1.23L, although smaller in the local transmissivity away from the transmission peaks, phase difference still can remain 180
Degree.Therefore, the super surface of acoustics of first structure unit and the second construction unit composition, overcomes traditional Meta Materials phase under bandwidth
Potential difference changes and the inconsistent shortcoming of amplitude, and this makes it more practical.
Phase difference change is inconsistent to influence the directionality of transmitted acoustic pulse at different frequencies, such as the sound wave at formant
Propagated along some principal direction, and sound wave direction is deviateed at deviation resonance peak.Therefore the sound that the embodiment of the present invention is provided
Super surface is learned to be particularly suitable for use in acoustic antennas manufacture.
The velocity field v inside first structure unit and the second mechanism unit shown in reference picture 2c and 2dyWith vxIt is distributed feelings
The local area mode between cavity is excited by respective inside configuration for condition, first structure unit and the second construction unit, the first knot
Sound wave is in the first gap (outgoing gap) and the opposite in phase in the second gap (incident gap) in structure unit, and the second structure list
Sound wave is identical with the phase in the second gap (incident gap) in the first gap (outgoing gap) in member；It is convex in the rectangle of upper flat plate
To rise have very strong transverse mass vibration between lower flat board, it was demonstrated that the presence of resonance；Locally resonant is by double cavity resonances
What structure was produced, phase delay by double Resonance Structures necessarily 180 degree.Here we add the structure of cavity with slit
To make sound wave be coupled with locally resonant pattern.In first structure unit, two slits add the structure of cavity directly to connect, and
In second construction unit, a double Resonance Structure has been added in centre, therefore, first structure unit and the second construction unit it
Between phase-delay difference be 180 degree.
Under the integrated mode of different first structure unit and the second construction unit, the transmission phase on the super surface of acoustics with
Difference, different transmission phases interfere, and can form different transmitted waves, and then can be by not when specifically used
With super surface realize different functions, such as the directed radiation of sound wave is focused on etc., and most typical application is the poly- of high intensity
Burnt ultrasonic wave can be used in medical surgery.
When a branch of sound wave is from vertical incidence below super surface, different from the second construction unit groups of first structure unit
Combined array row have difference in functionality, for example, shown in reference picture 3a, when the super surface array of acoustics is all by first structure or complete
When portion is made up of the second construction unit, main transmitted wave will be propagated along incident direction.Shown in reference picture 3b, when acoustics is super
When surface array is spaced by first structure unit and the second construction unit in one-dimensional square, incidence wave is just scattered as two
Individual symmetrical wave beam.Shown in reference picture 3c, when the super surface array of acoustics by first structure unit and the second construction unit two
When being spaced on dimension direction such as checkerboard, incidence wave is just scattered as four symmetrical wave beams.When arrangement is more unordered, wave beam
Direction is more.Beam splitting effect enables super surface to be applied in acoustic antennas, sound wave is propagated along several specific directions.
In a certain specific embodiment, the first structure unit on the above-mentioned super surface of acoustics and the upper flat plate of the second construction unit
On be evenly arranged with three rectangular preiections, now first structure unit and the second construction unit are four cavity type structures, enter one
Step, the first gap of first structure unit can be positioned at the left side of the rectangular preiection of upper flat plate first, the first corresponding knot
Second gap of structure unit is located on lower flat board and corresponded between first rectangular preiection and second rectangular preiection, the second structure
First gap of unit is located at the left side of the first rectangular preiection on the first flat board, the second gap of corresponding the second construction unit
Correspond to the right side of the 3rd rectangular preiection on lower flat board；First structure unit and the second construction unit are four cavity type structures
Have the beneficial effect that：With smaller structure lateral dimension, it is possible to achieve higher integrated level, the essence to sound wave control is improved
Degree；
Further, for four cavity type structures, to make performance more stable and being easy to the regulation and control to sound wave, setting makes above-mentioned
The cross-sectional length perpendicular to the first gap of first structure unit and the second construction unit is L, the gross thickness H of first structure unit
Gross thickness H with the second construction unit is：H=2L/7；The thickness h of upper flat plate and the thickness h of the lower flat board are：H=5L/
84；The width w in the first gap and the second gap is：W=1L/21；The width a of rectangular preiection is：A=2L/21, rectangular preiection
Height b is b=3L/21；Spacing p is between two rectangular preiections：P=5L/21.
Fig. 2 g and Fig. 2 h show the first structure unit and the second construction unit of four cavity type structures to incident acoustic wave
The relation of transmissivity, and first structure unit and the second construction unit outgoing sound wave phase difference relation, wherein 0 represents
The corresponding curve of one construction unit, 1 represents the corresponding curve of the second construction unit；It should be noted that first in the embodiment
The position in the first gap of construction unit and the second construction unit be not it is fixed, accordingly, the position in the second gap nor
Fixed, it above are only for example, should not be considered limiting of the invention；
Shown in reference picture 2e, Fig. 2 f, it is four cavity type knots that first structure unit and the second construction unit are shown in Fig. 2 e
During structure, first structure unit and the second construction unit can set the position A in the first gap1、A2、A3、A4, and can set
Put the position B in the second gap1、B2、B3、B4；It is six cavity type knots that first structure unit and the second construction unit are shown in Fig. 2 f
During structure, first structure unit and the second construction unit can set the position A in the first gap1、A2、A3、A4、A5、A6, Yi Jike
To set the position B in the second gap1、B2、B3、B4、B5、B6, under four cavity types and six cavity type structures, first structure unit
The position relationship in the first gap and the second gap and the first gap of the second construction unit and the second gap possible position
Put relation as shown in table 1 below：
Table 1
In table 1, A1B2The position for representing the first gap in first structure unit is A1Place, the position in the second gap is B2
Place；The like.
It should be noted that the first structure unit and the second knot on the super surface of acoustics provided in foregoing invention embodiment
The acoustic impedance of the composition material of structure unit should be greater than 200 times of the acoustic impedance of its background media, empty if background media is air
The density and the velocity of sound of gas are respectively 1.2kg/m3And 343m/s, then above-mentioned first structure unit and the second construction unit composition material
Material can be any one in plastics, metal or alloy.
Embodiment two
A kind of sound wave focusing arrangement is provided in the present embodiment, the sound wave focusing arrangement is included described in above-described embodiment
The super surface of acoustics, the device includes core and periphery, and multiple second construction units on the above-mentioned super surface of acoustics are connected
The core of the device is constituted, the first structure unit and the second construction unit on the above-mentioned super surface of acoustics are spaced composition should
The periphery of device；
Shown in reference picture 4, above-mentioned sound wave focusing arrangement be a wavestrip chip architecture, zone plate horizontal tangent plane in other words
See along the x-axis direction, core is constituted by 5 the second construction units, be the second construction unit, its outer part in y-axis direction
It is divided into first structure unit and the second construction unit is alternately arranged, is first structure unit or the second structure in y-axis direction
Unit；Experiment shows, can show extraordinary focusing effect on the sound wave focusing arrangement that wavestrip number is 5, especially
It is to have good performance on focal plane, a width of 4.6cm of its half-peak.Wherein, in the first structure unit on the right side of core
It is located at the right side in the first gap with the second gap of the second construction unit, and has between first structure unit and the second construction unit
There are certain intervals, further, shown in reference picture 4, at intervals of d1=1.8cm, d4=0.8cm, d2=d5=2.5cm, d3=d6
=0.9cm, now focal length xcFor 50cm.
, it is necessary to explanation in the embodiment of the present invention, term " " center ", " on ", " under ", "left", "right", " vertical ", " water
It is flat ", " interior ", the orientation of the instruction such as " outer " or position relationship for based on orientation shown in the drawings or position relationship, or the hair
Orientation or position relationship that bright product is usually put when using, are for only for ease of the description present invention and simplify description, rather than
Indicate or imply that the device or element of meaning there must be specific orientation, with specific azimuth configuration and operation, therefore can not
It is interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, without being understood that
To indicate or implying relative importance.
It should also be noted that, unless otherwise clearly defined and limited, term " setting ", " installation ", " connected ", " company
Connect " it should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or it is integrally connected；It can be machine
Tool is connected or electrically connected；Can be joined directly together, can also be indirectly connected to by intermediary, can be two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in the present invention with concrete condition
Concrete meaning.
Finally it should be noted that：Embodiment described above, is only the embodiment of the present invention, to illustrate the present invention
Technical scheme, rather than its limitations, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those within the art that：Any one skilled in the art
The invention discloses technical scope in, it can still modify to the technical scheme described in previous embodiment or can be light
Change is readily conceivable that, or equivalent substitution is carried out to which part technical characteristic；And these modifications, change or replacement, do not make
The essence of appropriate technical solution departs from the spirit and scope of technical scheme of the embodiment of the present invention.The protection in the present invention should all be covered
Within the scope of.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of super surface of acoustics, it is characterised in that including：
Multiple first structure units and multiple second construction units, multiple first structure units and multiple second structures
Unit is connected with each other and in the same plane, the phase of the first structure unit and the outgoing sound wave of second construction unit
Position delay difference is 180 degree, and the first structure unit has identical transmissivity to incident acoustic wave with second construction unit；
The first structure unit and second construction unit include respectively：Upper flat plate, lower flat board, the first side wall and the second side
Wall, formula structure is connected as one between the upper flat plate and lower flat board by the first side wall and second sidewall, the upper flat plate
Multiple rectangular preiections are evenly arranged with lower surface；
The centre of two adjacent rectangular preiections on the upper flat plate, which is provided with the first gap, the lower flat board, corresponds to two
The centre position of individual adjacent rectangular preiection is provided with the second gap；
A rectangular preiection is separated between first gap and second gap of the first structure unit；
Three rectangular preiections are separated between first gap and second gap of second construction unit.
2. the super surface of acoustics according to claim 1, it is characterised in that five rectangles are evenly arranged with the upper flat plate
Projection, so that the first structure unit and second construction unit, six cavity type structures of formation.
3. the super surface of acoustics according to claim 1, it is characterised in that three rectangles are evenly arranged with the upper flat plate
Projection, so that the first structure unit and second construction unit are four cavity type structures.
4. the super surface of acoustics according to claim 1, it is characterised in that the first structure unit and second structure
The size of unit is identical, upper flat plate thickness, lower slab-thickness, the size of rectangular preiection, the first seam of the first structure unit
The chi of gap width, the second gap width respectively with the upper flat plate thickness, lower slab-thickness, rectangular preiection of second construction unit
Very little, the first gap width, the width correspondence in the second gap are identical.
5. the super surface of acoustics according to claim 1, it is characterised in that the first structure unit and second structure
The cross-sectional length perpendicular to first gap of unit is L, and the first structure unit is total with second construction unit
Thickness, upper flat plate thickness, lower slab-thickness, the width in the first gap and the width in the second gap and the size of rectangular preiection are equal
It is in proportionate relationship with the length L.
6. the super surface of acoustics according to claim 2, it is characterised in that the first structure unit and second structure
The cross-sectional length perpendicular to first gap of unit is L, the gross thickness H of the first structure unit and second structure
The gross thickness H of unit is：H=6L/31；The thickness h of the upper flat plate and the thickness h of the lower flat board are：H=5L/124；
The width w in first gap and second gap is：W=L/31；The width a of the rectangular preiection is：A=2L/31, institute
The height b for stating rectangular preiection is b=3L/31.
7. the super surface of acoustics according to claim 6, it is characterised in that spacing p is between described two rectangular preiections：p
=5L/31.
8. the super surface of acoustics according to claim 3, it is characterised in that the first structure unit and second structure
The cross-sectional length perpendicular to first gap of unit is L, the gross thickness H of the first structure unit and second structure
The gross thickness H of unit is：H=2L/7；The thickness h of the upper flat plate and the thickness h of the lower flat board are：H=5L/84；Institute
The width w for stating the first gap and second gap is：W=1L/21；The width a of the rectangular preiection is：A=2L/21, institute
The height b for stating rectangular preiection is b=3L/21.
9. the super surface of acoustics according to claim 8, it is characterised in that spacing p is between described two rectangular preiections：p
=5L/21.
10. a kind of sound wave focusing arrangement, it is characterised in that described including any described super surface of acoustics of claim 1~9
Device includes core and periphery, and multiple second construction units on the super surface of acoustics connect and compose described device
Core, the first structure unit and the second construction unit on the super surface of acoustics are spaced the periphery for constituting described device
Part.
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| CN111667809A (en) * | 2020-05-29 | 2020-09-15 | 哈尔滨工程大学 | Acoustic super surface capable of regulating underwater sound wave reflection angle |
| CN111667809B (en) * | 2020-05-29 | 2022-12-13 | 哈尔滨工程大学 | Acoustic super surface capable of regulating underwater sound wave reflection angle |
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