CN108062948A - A kind of method based on patterning tailoring technique regulation and control sound wave - Google Patents
A kind of method based on patterning tailoring technique regulation and control sound wave Download PDFInfo
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- CN108062948A CN108062948A CN201711210888.1A CN201711210888A CN108062948A CN 108062948 A CN108062948 A CN 108062948A CN 201711210888 A CN201711210888 A CN 201711210888A CN 108062948 A CN108062948 A CN 108062948A
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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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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
- D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
Abstract
The invention discloses it is a kind of based on patterning tailoring technique regulation and control sound wave method, including：Determine that phase regulates and controls film, the phase change 180 degree for the sound wave that the phase regulation and control film can be transmitted；Phase regulation and control film is cut, so that the sound wave field distribution after the phase regulation and control film after cutting transmits changes, cutting pattern by control can make the sound wave flat focus after transmission stablize the sound propagated vortex in focus, generation in focus or space-focusing or form hyperoscillating phenomenon, so as to generate the focal spot of sub-wavelength, the present invention is by controlling the regulation and control for cutting pattern realization to transmitted acoustic pulse different-effect, the present invention is passive device, all have great advantage in energy consumption, volume, portability, have broad application prospects.
Description
Technical field
The invention belongs to sound wave control technical field, more particularly, to one kind based on patterning tailoring technique regulation and control sound
The method of ripple.
Background technology
Have emphatically for noise isolation and absorption, acoustic communication, Sound stealth, acoustic imaging, acoustic energy weapon etc. to the regulation and control of sound wave
The meaning wanted.In existing document, regulated and controled to realize that the method for above-mentioned a variety of functions has the stacking of waveguide cavity to sound wave
With the etching of metallic plate etc..
Change transmission sound phase by designing the structure of waveguide cavity, in the plane design perpendicular to incident direction not
With position have different phase changes can be used for regulate and control sound field distribution.It can additionally by a series of heimholtz resonators
To realize that sub-wavelength is imaged.And sound-filed simulation can also be adjusted into specific pattern by metallic plate being etched (or cutting)
Control.Thick metallic plate goes back sound reflection as bounds, and transmission sound field is done as sub- sound source in the part being etched away
Go out contribution, so as to regulate and control sound wave.These are all passive device and belong to the regulating device of plane.For example, the prior art is distinguished
Sound wave is regulated and controled using the method for the etching of the stacking and metallic plate of waveguide cavity, to realize sound focusing and acoustics vortex
Deng.
Both the above mode is required for thick steel plate to isolate sound wave as waveguide or bounds so that whole device is stupid
Weight is huge, is not easy to process, cost is also higher, limits its application range.And the method for phase unit is stacked due to its body
Product cannot be ignored, and the precision of specific effect is limited.And the method for metallic plate etching is transmission due to there was only the part of etching,
Degree of freedom in design is also than relatively limited.
The content of the invention
The defects of for the prior art, it is an object of the invention to solve existing sound wave control to need thick steel plate as ripple
It leads or bounds isolates sound wave so that whole device bulky is not easy to process, cost is also higher, and limiting it should
Use scope.And the method for phase unit is stacked since its volume cannot be ignored, the precision of specific effect is limited etc., and technologies are asked
Topic.
To achieve the above object, the present invention provides a kind of method based on patterning tailoring technique regulation and control sound wave, including：
Determine that phase regulates and controls film, the phase change 180 degree for the sound wave that the phase regulation and control film can be transmitted；It is right
The phase regulation and control film is cut so that the sound wave field distribution after phase regulation and control film transmission after cutting changes
Become, by controlling cutting pattern that the sound wave flat focus after transmission can be made steady in focus, generation in focus or space-focusing
Surely the sound propagated is vortexed or forms hyperoscillating phenomenon, so as to generate the focal spot of sub-wavelength.
Optionally, by controlling the size cut, the non-cutting of process for making the sound wave behind clipping region adjacent thereto
The wave path-difference that sound wave after the transmission of region reaches focus is the half of wave length of sound so that the phase regulation and control film after cutting
Sound wave flat focus after transmission are in focus or space-focusing in focus.
Optionally, phase regulation and control film is cut into fermat spiral pattern so that the phase tune Jing Guo the cutting
The stable sound propagated of the sound wave generation after film transmission is controlled to be vortexed.
Optionally, phase regulation and control film is cut into the quasi-periodic pattern of Pan Luosi lattices so that pass through the sanction
Sound wave after the phase regulation and control film cut forms hyperoscillating phenomenon, so as to generate the focal spot of sub-wavelength.
Optionally, when the sound wave flat focus after the phase regulation and control film transmission after cutting are in focus, to described
Phase regulation and control film cutting includes：
By the strip structure that is symmetrically distributed of phase regulation and control film cutting, to symmetrical centre nth bar line at a distance of right
The width l at title centernMeet：
Wherein, fcFor the focal length of design, λ is wave length of sound, and N is the total line number of the strip structure one side.
Optionally, when the sound wave space-focusing after the phase regulation and control film transmission after cutting is in focus, to described
Phase regulation and control film cutting includes：
The loop configuration that phase regulation and control film cutting is symmetrically distributed, the ring radius r of nth bar loop wirenMeet：
Wherein, fcFor the focal length of design, λ is wave length of sound, and N is total loop wire number of the loop configuration.
Optionally, the fermat spiral pattern includes two helicals, and the expression formula of two helicals meets respectively：
Wherein, m is linear coefficient, r1And r2The polar diameter of respectively two helicals, θ1And θ2The pole of respectively two helicals
Angle.
Optionally, by choosing suitable m so that the sound wave of different wave length regulates and controls film by the phase cut and transmits
Stable sound can be generated afterwards to be vortexed.
Optionally, as m=9.1,11 millimeters -17 millimeters of sound wave can after the phase regulation and control film transmission by cutting
Stable sound is generated to be vortexed.
Optionally, the quasi-periodic pattern of the Pan Luosi lattices is combined by two kinds of diamond shapes, the acute angle point of described two diamond shapes
Wei not be 36 degree and 72 degree, described two diamond shapes, which are combined into, to be paved with phase regulation and control film similar to pentagonal quasi-periodic pattern and puts down
Face, the circular hole cut out are located on the vertex of two kinds of diamond shapes.
Optionally it is determined that phase regulates and controls film, including：Arbitrary density is more than to the metallic particles or nonmetallic of fibrous material
Particle and arbitrary modulus are less than the high molecular material of particle or soft material solution is uniformly mixed to get mixed solution；It will mix molten
Liquid, using electrostatic spinning technique, obtains the electrospun fibers with particle, and then accumulates shape by electrospun fibers as raw material
Into electrostatic spinning film, the electrostatic spinning film is the phase regulation and control film.
In general, by the above technical scheme conceived by the present invention compared with prior art, have below beneficial to effect
Fruit：
1st, the present invention by by film cutting be in strip or circular pattern can realize it is high to the sound wave after transmissive film
The Acoustic focusing of effect can be used for the needs such as medical ultrasound ripple rubble, acoustics positioning heating, acoustic weapon and accurately control high-energy
The acoustic applications occasion of concentration.
2nd, the present invention is cut into fermat spiral pattern by film, and the sound wave after transmission can be made to generate stable sound whirlpool
Rotation, sound vortex can stablize propagation in the certain distance of transmitted field, and vortex center intensity is 0.The present invention can realize
Multi-functional and make free burial ground for the destitute by oneself sound wave is regulated and controled, the sound vortex that thin-film material based on this invention obtains can be used for noise
It isolation, acoustic communication, particle manipulation etc., therefore film provided by the invention and cuts pattern by controlling and obtains what sound was vortexed
Method has broad application prospects.
3rd, the quasi-periodic pattern of the invention by the way that film to be cut into Pan Luosi lattices realizes the sound wave sub-wavelength in far field
It differentiates, acquired sub-wavelength focal spot full width at half maximum is about 0.25 times of wavelength.Mean to double in length resolution, and from whole
It is seen on a area, the imaging precision limit can be 4 times of conventional means, and in one direction, wavelength used in imaging reduces half,
Imaging precision doubles, i.e., is to be imaged its precision using sub-wavelength in both direction all to improve one for thin film planar
Times, therefore imaging precision rises to original 4 times.
4th, size reduction.Compared with the design of arbitrary similar function before, present invention utilizes the two of initial phase difference 180 degree
Subregion collective effect, making device area, y both directions all reduce half in x, so the film gross area can be made to reduce 3/
4 (z directions are incidence wave direction, and xy is vertical with z directions).
5th, capacity usage ratio higher.The present invention is based on total transmissivity structure, make use of the energy of entire plane, there is higher
Capacity usage ratio.And the present invention is passive device, is all had great advantage in energy consumption, volume, portability.
Description of the drawings
Fig. 1 is the method flow schematic diagram provided by the invention for regulating and controlling sound wave based on patterning tailoring technique；
Fig. 2 integrates field computation schematic diagram for transmission provided by the invention；
Fig. 3 is strip structure focus pattern cutting schematic diagram provided by the invention；
Fig. 4 is sound wave focal path schematic diagram provided by the invention；
Fig. 5 emulates transmitted field figure (xz planes) for strip structure provided by the invention；
Fig. 6 is strip structure experiment test transmitted field figure (xz planes) provided by the invention；
Fig. 7 is loop configuration focus pattern cutting schematic diagram provided by the invention；
Fig. 8 emulates transmitted field figure (x/y plane) for loop configuration provided by the invention；
Fig. 9 emulates transmitted field figure (yz planes) for loop configuration provided by the invention；
Figure 10 is the emulation relation that focus energy intensification factor provided by the invention increases and changes with fringe number and number of rings N
Figure；
Figure 11 is fermat spiral pattern schematic diagram of the present invention；
Figure 12 is the schematic diagram that the sound wave that the present invention is formed is vortexed；
Figure 13 is the emulation of the rotational field provided by the invention specifically generated and experiment test phase diagram；
Figure 14 is the emulation of rotational field and experiment test intensity map that the present invention specifically generates；
Figure 15 is emulation phase diagram of the rotational field of the invention specifically generated with distance change；
Figure 16 is emulation intensity map of the rotational field of the invention specifically generated with distance change；
Figure 17 is the quasi-periodic pattern schematic diagram provided by the invention that phase regulation and control film is cut into Pan Luosi lattices；
Figure 18 emulates transmitted field figure (xz planes) for Pan's Loews lattice structure provided by the invention；
Figure 19 emulates transmitted field center detail view and corresponding experiment test for Pan's Loews lattice structure provided by the invention
Scheme (xz planes)；
Figure 20 is the intensity distribution on the transversal of Figure 19 fields center；
Figure 21 is emulation intensity map of the sound-filed simulation provided by the invention specifically generated with distance change；
Figure 22 is the relational graph of focal spot intensity provided by the invention and full width at half maximum with distance change；
Figure 23 is that the quality of copper particle and polyvinyl alcohol provided by the invention is 1:When 8, obtained according to the method for the present invention
The scanning electron microscope (SEM) photograph of fiber membrane；
Figure 24 is that the quality of copper particle and polyvinyl alcohol provided by the invention is 1:When 4, obtained according to the method for the present invention
The scanning electron microscope (SEM) photograph of fiber membrane；
Figure 25 is that the quality of copper particle and polyvinyl alcohol provided by the invention is 1:When 2, obtained according to the method for the present invention
The scanning electron microscope (SEM) photograph of fiber membrane；
Figure 26 is that the quality of copper particle and polyvinyl alcohol provided by the invention is 1:When 1, obtained according to the method for the present invention
The scanning electron microscope (SEM) photograph of fiber membrane；
Figure 27 is that the quality of copper particle and polyvinyl alcohol provided by the invention is 1:The fiber membrane obtained when 8 carries out sound wave
Transmit the result figure of test；
Figure 28 is that the quality of copper particle and polyvinyl alcohol provided by the invention is 1:The fiber membrane obtained when 4 carries out sound wave
Transmit the result figure of test；
Figure 29 is that the quality of copper particle and polyvinyl alcohol provided by the invention is 1:The fiber membrane obtained when 2 carries out sound wave
Transmit the result figure of test；
Figure 30 is that the quality of copper particle and polyvinyl alcohol provided by the invention is 1:The fiber membrane obtained when 1 carries out sound wave
Transmit the result figure of test.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Conflict is not formed each other to can be combined with each other.
For the disadvantages described above or Improvement requirement of the prior art, the present invention is based on can transmission phase be changed 180 degree
Film and specific pattern design rule are to realize sound wave control.Film is cut into using laser cutting or other cutting means
Designed pattern can realize that the sound field that rear film different-effect is cut to transmission regulates and controls.Cutting on this fexible film
Cut very convenient, and integral device is also very light, and cost is relatively low, is made beneficial to large-scale production.This mode is also passive
, there is advantage in energy consumption and portability.
Fig. 1 is the method flow schematic diagram provided by the invention for regulating and controlling sound wave based on patterning tailoring technique, such as Fig. 1 institutes
Show, including step S101 to step S102.
S101 determines that phase regulates and controls film, the phase change 180 for the sound wave that phase regulation and control film can be transmitted
Degree.
S102 cuts phase regulation and control film so that after the phase regulation and control film transmission after cutting
Sound wave field distribution changes, by controlling cutting pattern that the sound wave flat focus after transmission can be made to gather in focus or space
Coke stablizes the sound vortex propagated in focus, generation or forms hyperoscillating phenomenon, so as to generate the focal spot of sub-wavelength.
It specifically, can according to Rayleigh-Suo Mofei diffraction formulas when the film surface after plane sound wave normal incidence to cutting
Calculate corresponding transmission field distribution.The formation of transmitted field is specifically as shown in Figure 2：A in Fig. 2, b figure are in rectangular coordinate system respectively
With situation about being discussed under cylindrical coordinate, two kinds of situations are similar, here mainly with rectangular coordinate system introduction.Flat table where XOY
Show sub- sound source face, and the plane where point S is the object penetrating plane of our of interest any one parallel to sound source face,
P represents acoustic pressure.The acoustic pressure (amplitude and phase that include acoustic pressure) at any point of objective plane is all source point hairs on sound source face
The result that the sub- sound wave gone out is superimposed at target point.By Rayleigh-Suo Mofei diffraction integral formula, can obtain in target face a bit
Acoustic pressure be expressed as (contribution of the part of no film to transmitted field)：
Wherein,ω is the angular frequency of incidence wave, and k is the wave vector of incidence wave.ρairFor the density of air,It is source point (x under rectangular coordinate systemS,yS,zS) between target point (x, y, z)
Distance, Ω1Indicate the integrating range of no film portion (cropped part).
And for the part for having film, since film has incident acoustic wave the phase change of 180 degree, it is equivalent to this part
Initial phase adds 180 degree, so showing in formula and being then：
Wherein, Ω2Indicate the integrating range of film portion.
Under cylindrical coordinate, similar has：
Wherein,It is source point (r under cylindrical coordinateS,θS,zS) and target point
The distance between (r, θ, z).
Optionally, when the sound wave flat focus after the phase regulation and control film transmission after cutting are in focus, to phase
Regulation and control film cutting includes：
The strip structure that phase regulation and control film cutting is symmetrically distributed, as shown in Fig. 2, the nth bar line to symmetrical centre
At a distance of the width l of symmetrical centrenMeet：
Wherein, fcFor the focal length of design, λ is wave length of sound, and N is the total line number of strip structure one side.
As shown in Figure 2, according to the embodiment of the present invention, main body is made of film 1 to be cut and cutting mode 2.It will
Film is cut according to the method for Fig. 2.Further, for strip structure, the specific integrating range of transmitted field is substituted into public
Formula, the acoustic pressure after simplifying us and can be transmitted are distributed following expression：
Fig. 4 is sound wave focal path schematic diagram provided by the invention, as shown in Figure 4, black portions (not cutting part) generation in figure
Table initial phase is 180 degree, and blank parts represent initial phase as 0 (by part is reduced).The principle mutually grown according to phase, two adjacent sources
The wave path-difference of point to focus should be the half of wavelength, i.e.,
The π on the equal sign left side indicates film and does not have the initial phase of membrane part difference 180 degree in formula, so making the equal sign left side integrally equal to π's
Words, then the phase difference of adjacent source points to focus is just just 2 π, and such field is just superimposed without the part of counteracting completely.
The width l of bar patennIt is marked in figure, n represents which bar line to center, fcIt is the focal length of design, λ is
To the wave length of sound in requisition for regulation and control.Due to l0=0, we can be obtained by
So width of fringe can be expressed as：
Specifically, the maximum N of n is bigger, focus strength is stronger, and corresponding whole image area is also bigger, is designed in Fig. 2
N illustrated exemplified by 6.fcIt is the focal length of design, can specifies according to demand, then lnAlso can accordingly change.
Fig. 5 and Fig. 6 is the emulation of specific focusing effect and experiment test design sketch respectively, plane sound wave normal incidence to pattern
The device surface of change, the sound wave for inciding into device dash area (not cutting part) occur the phase change of 180 degree, incide into sky
Phase change does not occur for white part (by part is reduced).Every bit in plane interferes superposition as sub- sound source, finally
Assemble in the focal point of design.From the intensity distribution of Fig. 5 and Fig. 6 it may be seen that in middle there are one apparent speck,
Here it is designed focus, therefore illustrate that experiment and simulated effect coincide very well.
According to Fig. 5 and Fig. 6, after phase regulation and control film is cut into strip structure, the sound wave after transmission gathers plane
Coke illustrates to cause sound wave flat focus using the method for cutting out provided by the invention based on film in focus.
Optionally, when the sound wave space-focusing after the phase regulation and control film transmission after cutting is in focus, to described
Phase regulation and control film cutting includes：
The loop configuration that phase regulation and control film cutting is symmetrically distributed, the ring radius r of nth bar loop wirenMeet：
Wherein, fcFor the focal length of design, λ is wave length of sound, and N is total loop wire number of loop configuration.
Fig. 7 is ring focusing design schematic diagram, similar with strip structure principle, and correspondingly, 1 represents to be cut in Fig. 7
Film is cut, 2 represent cutting mode, are analyzed with reference to above-mentioned strip structure Focusing Theory, in the loop configuration, the ring of the n-th ring item
Radius rnMeet It is only focused in one direction compared with bar shaped, the ring
Shape structure has the effect of focusing in two dimensions.
It should be noted that since strip structure provided by the invention is consistent with the principle that loop configuration focuses on sound wave,
The line sequence number of strip structure can be then referred to by identical symbol n or the loop wire sequence number of loop configuration, N refer to strip structure
Total line number or loop wire structure total loop wire number.
The focusing effect analogous diagram of Fig. 8 and Fig. 9 respective annular structures, Fig. 8 are distributed for xy cross-sectional strengths, and Fig. 9 is strong for xz faces
Degree distribution.It can be seen that the energy overwhelming majority is all concentrated at gonglion, and there is focusing on xy, two planes of xz.
According to Fig. 8 and Fig. 9, after phase regulation and control film is cut into loop configuration, the sound wave after transmission gathers space
Coke illustrates to cause sound wave space-focusing using the method for cutting out provided by the invention based on film in focus.
Figure 10 is the focus center energy intensification factor (being represented with dB) of emulation, and the legend in Figure 10 shows triangle and side
Shape represents to cut respectively pattern as bar shaped and the situation of loop configuration, and the energy of focus center is with striped quantity as seen from Figure 10
(or quantity of ring item) increases and enhances.Their rule is similar, and energy intensification factor is all with striped quantity into positive
It closes, simply the intensification factor bigger of loop configuration.
The present invention to can transmission phase be changed 180 degree film by being cut into specific pattern, to realize to sound wave
Passive regulation and control.Such as film is cut into bar paten (Fig. 3), it can be used for being focused on perpendicular to stripe direction sound wave.If
Film is cut into circular pattern (Fig. 7), can be used for the plane inner focusing perpendicular to acoustic propagation direction, corresponding focus is strong
Degree also can be stronger.
Optionally, phase can be regulated and controled film and is cut into fermat spiral pattern so that the phase regulation and control Jing Guo the cutting
Sound wave after film transmission generates the sound stablized and propagated and is vortexed.
Specifically, as shown in figure 11, according to the embodiment of the present invention, main body is by 2 groups of film 1 to be cut and cutting mode
Into.Film is cut according to the pattern of Figure 11 to obtain fermat spiral pattern, is center superposition field phase according to Phase Stacking
The principle of acute variation is spent from 0 to 360, has selected fermat spiral pattern.Fermat spiral pattern includes two helicals, two helicals
Expression formula meet respectively：
Wherein, above-mentioned formula is polar coordinate representation method, and m is linear coefficient, determines the size of pattern, this parameter can
It is modified with the wavelength adjusted as needed, to adapt to wavelength.r1And r2The polar diameter of respectively two helicals, θ1And θ2Respectively
For the polar angle of two helicals.
Optionally, as m=9.1,11 millimeters -17 millimeters of sound wave can after the phase regulation and control film transmission by cutting
Stable sound is generated to be vortexed.M also has a similar effect when being other values, and m mainly influences the size of entire pattern and corresponding
The wavelength of regulation and control.Regulate and control wavelength with pattern flight pitch usually in a magnitude.
As shown in Figure 12, figure bend dash area (not cutting part) represents initial phase as 180 degree, blank parts (quilt
Cut part) initial phase is represented as 0.Specifically, the phase change of 180 degree occurs for the sound wave of incident dash area, incides into sky
Phase change does not occur for white part.Every bit in plane interferes superposition as sub- sound source, is finally formed in transmitted field
Stablize the vortex propagated.
Specifically, the transmitted field acoustic pressure calculation formula provided with reference to Fig. 2, the fermat spiral pattern of the application, by integrated area
Between substitute into, the acoustic pressure put in the sound wave target face after being transmitted is：
Wherein, R represents the maximum radius (maximum radius of pattern as shown in Figure 2 or Figure 3) of fermat spiral pattern, PFIt represents
Contribution of the cropped part to acoustic pressure.In one example, R can be configured to 5 centimetres.
Figure 13 is the emulation of rotational field and experiment test phase diagram specifically generated, and the plane shown is x/y plane, is put down
To patterned device surface, 180 degree occurs face sound wave normal incidence for the sound wave for inciding into device dash area (not cutting part)
Phase change, incide into blank parts (by reduce part) phase change does not occur.Every bit in plane is as sub- sound
Source interferes superposition, is finally formed and is vortexed after device.From the field of behaviour of Figure 13 it may be seen that entire plane phase
The place of being centrally located is to change from -180 degree to 180 degree, and experimental result and simulation result coincide preferably.
Figure 14 is the emulation of rotational field and experiment test intensity map specifically generated, and the plane shown is x/y plane, is put down
To patterned device surface, 180 degree occurs face sound wave normal incidence for the sound wave for inciding into device dash area (not cutting part)
Phase change, incide into blank parts (by reduce part) phase change does not occur.Every bit in plane is as sub- sound
Source interferes superposition, is finally formed and is vortexed after device.From the intensity field of Figure 14 it may be seen that entire planar central
It is extremely weak to locate intensity, is almost 0, side demonstrates the presence of phase singularity, and phase singularity, that is, such phase in finger center is violent
The point of variation, at this sampling point, field strength is not present.Meanwhile such intensity distribution field can be used for particle rotation, manipulation etc.
Aspect.
Figure 15 is the emulation phase diagram of the rotational field that specifically generates with distance change, and the plane shown is x/y plane, point
The situation under 4 distance z is not simulated, perfect vortex is all formd under these distances, during entire plane phase is distributed in
It is to change from -180 degree to 180 degree at the heart.From the field of behaviour of Figure 15 it may be seen that with the increase of distance z, entire phase
Potential field starts rotation (under minimum distance, be vortexed still unstable) counterclockwise, it was demonstrated that such a rotational field, meanwhile, explanation
In the range of certain distance, it can generate sound transmitted through the sound wave for cutting pattern and be vortexed.
Figure 16 is the emulation intensity map of the rotational field that specifically generates with distance change, and the plane shown is x/y plane, point
The situation under 4 distance z is not simulated, and perfect vortex is all formd under these distances.From the field of behaviour of Figure 15, we can
To see with the increase of distance z, entire intensity field is kept approximately constant and (under minimum distance, is vortexed still unstable), and in
Psychological field is all 0 by force, it was demonstrated that the sound wave after transmission is respectively formed such a rotational field in the range of certain distance.
From Figure 13-Figure 16, stable sound can be formed based on film provided by the invention and tailoring technology and be vortexed, and
Sound vortex can be formed in transmission certain distance, the scope of application is wider；And obtained sound voorticity is efficient, and loss is small.
Such sound vortex is particularly used in noise isolation, acoustic communication, particle manipulation etc..
Optionally, phase regulation and control film is cut into the quasi-periodic pattern of Pan Luosi lattices so that by the cutting
Sound wave after phase regulation and control film forms hyperoscillating phenomenon, so as to generate the focal spot of sub-wavelength.
Wherein, the length of Rayleigh limit is 0.5 times of wavelength (on the basis of full width at half maximum), also means that prior art energy
The minimum length of resolution is 0.5 times of wavelength.And the target that sub-wavelength is differentiated seeks to generate a full width at half maximum less than Rayleigh pole
The focal spot of limit for length's degree.
Optionally, the quasi-periodic pattern of Pan Luosi lattices is combined by two kinds of diamond shapes, and the acute angle of two kinds of diamond shapes is respectively 36 degree
With 72 degree, described two diamond shapes are combined into is paved with phase regulation and control thin film planar similar to pentagonal quasi-periodic pattern, cuts
The circular hole gone out is located on the vertex of two kinds of diamond shapes.
Optionally, the radius of circular hole is depending on the size of pattern, makes circular hole as far as possible big and does not interfere with each other, circular hole aperture and
Circular hole average headway and the wave length of sound that is regulated and controled are in an order of magnitude.
Figure 17 is the quasi-periodic pattern schematic diagram provided by the invention that phase regulation and control film is cut into Pan Luosi lattices.Such as
Shown in Figure 17, according to the embodiment of the present invention, main body is made of film 1 to be cut and cutting mode 2.By film according to Figure 17
Method cut, when plane sound wave normal incidence to cutting after film surface when, can according to Rayleigh-Suo Mofei diffraction formulas
Calculate corresponding transmission field distribution.Dash area represents the sound wave initial phase after transmission as 180 degree, blank parts generation in Figure 17
Table sound wave initial phase is 0.
As shown in figure 17, the pattern that dotted line is sketched the contours of in figure is the quasi-periodic pattern similar to Pan Luosi lattices.Pattern by
Two kinds of diamond shapes (acute angle is respectively 36 degree and 72 degree) are combined into, and a plane is paved with similar to pentagonal quasi-periodic pattern with this
(specific size is depending on the cycle), the circular hole being cut into are located on the vertex of diamond shape.The radius of circular hole is according to the big of pattern
Depending on small, make circular hole as far as possible big and do not interfere with each other.Circular hole aperture and circular hole average headway are also with regulated and controled wavelength in a quantity
Grade.
In a specific example, Circularhole diameter can be set as 4 millimeters, the diamond shape length of side is 16 millimeters, the wave length of sound of adjusting
For 11 millimeters -17 millimeters.
One simple case of hyperoscillating function is as follows：
F (x)=∑ an cos(2πnx)
Formula represents the superposition of the cosine function of some different space frequency components, and f (x) represents hyperoscillating function, and x is represented
Position on one direction, anThe intensity of n-th ingredient in representative function, in other words to the contribution of generic function.By suitable
Choose anValue, finally superposition can be caused to obtain the component of more high frequency (vibration is faster).anValue correspond to the tribute of each section
It offers, the point of different position determines to the contribution of target focal spot by them to the distance of focal spot and direction on the Thinfilm pattern cut
It is fixed, so specific a can be formed by adjusting the distribution of Thinfilm patternnDistribution.And Pan Luosi lattices are to the diffraction of transmitted field
Superposition just meets similar relation, can be superimposed the component for generating more high frequency.Generating the component of more high frequency can just make
The minimum full width at half maximum for obtaining focal spot is limited to the component of this high frequency, so that the full width at half maximum of focal spot is less than with incident frequencies
On the basis of Rayleigh criterion.
Figure 18 is the emulation intensity map of hyperoscillating sound-filed simulation specifically generated, and the plane shown is x/y plane, plane
To patterned device surface, 180 degree occurs sound wave normal incidence for the sound wave for inciding into device dash area (not cutting part)
Phase change, incide into blank parts (by part is reduced) does not occur phase change.Every bit in plane is as sub- sound source
Superposition is interfered, is finally formed and is vortexed after device.From the field of behaviour of Figure 18 it may be seen that entire plane forms
One five axisymmetric pattern, and at bosom, there is the focal spot that intensity is weaker at one, it is exactly formed hyperoscillating herein
Sub-wavelength focal spot.
Figure 19 is from the emulation intensity map of Figure 18 central parts intercepted out and the experiment test intensity map of corresponding region.Institute
The plane of displaying is x/y plane, and from this figure it may be seen that experimental result is coincide very well with emulation, and center has one
The weaker focal spot in place, is hyperoscillating sub-wavelength focal spot, that is to say, that is sub- ripple at the bosom of the sound wave flat field after transmission
Long focal spot.
Further, Figure 20 is two intensity distributions by the center of circle intercepted from the emulation of Figure 18 and experiment distribution
Figure, we can be more clearly visible that between two intensity peaks there are one small peak from strength distribution curve, and this small peak
Exactly represent the focal spot of hyperoscillating formation.As shown in Figure 20, half height half of the small peak that hyperoscillating is centrally formed in regional transmission
Wide experimental result is：4.8mm, simulation result are：3.5mm illustrates the transmitted acoustic pulse obtained by the cutting pattern of the present invention
The full width at half maximum of the focal spot at center be smaller than Rayleigh criterion (7.3mm, by regulation and control wave length of sound half), therefore form
The focal spot of sub-wavelength width is imaged for sub-wavelength acoustic scan, imaging resolution can be greatly improved.
Figure 21 is the emulation intensity map of the sound-filed simulation that specifically generates with distance change, and the plane shown is x/y plane,
4 distance z (z are simulated respectively1=28mm, z2=31mm, z3=32mm, z4=40mm.) under situation, these distance under
All form preferable hyperoscillating phenomenon.It will be seen that increasing with distance, center focal spot intensity first weakens and enhances afterwards, and
Focal spot width is also first to reduce to increase afterwards, it is seen that the phase after the cutting that Figure 17 is provided regulates and controls film within the specific limits
Sound wave has such hyperoscillating phenomenon, illustrates to realize in a wide range of distance in far field using tailoring technique provided by the invention
Interior sub-wavelength is differentiated, and can generate the focal spot of sub-wavelength width.
Figure 22 more clearly illustrates the relation of focal spot intensity and full width at half maximum with distance change, it may be seen that distance
For that can form the focal spot of sub-wavelength between 24 to 40 millimeters, the full width at half maximum of focal spot is smaller than Rayleigh criterion, that is, realizes
Far field is on a large scale apart from interior sub-wavelength super-resolution.And correspondingly, when focal spot minimum when is also intensity minimum, this
Meet the principle of hyperoscillating, practice is to need the corresponding power for improving sound source, to improve the size of focal spot intensity.
The sub-wavelength that the present invention realizes far field is differentiated, and can be used for acoustic scan imaging.Acquired sub-wavelength focal spot half
High overall with is about 0.25 times of wavelength.Mean to double in length resolution, and from entire area, the imaging precision limit
Can be 4 times of conventional means.
To sum up, present invention utilizes two parts region collective effect of initial phase difference 180 degree, film size can be subtracted
It is small.The present invention is based on total transmissivity structures, make use of the energy of entire plane, there is higher capacity usage ratio.And the present invention
It is passive device, all has great advantage in energy consumption, volume, portability.
Optionally it is determined that phase regulates and controls film, including：Arbitrary density is more than to the metallic particles or nonmetallic of fibrous material
Particle and arbitrary modulus are less than the high molecular material of particle or soft material solution is uniformly mixed to get mixed solution；It will mix molten
Liquid, using electrostatic spinning technique, obtains the electrospun fibers with particle, and then accumulates shape by electrospun fibers as raw material
Into electrostatic spinning film, the electrostatic spinning film is the phase regulation and control film.
The mixed solution that the present invention obtains after being mixed by variable grain from different high molecular materials or soft material solution,
Different-diameter and the electrostatic spinning film of distribution can be prepared, due to the vibration of particle in film, so as to different frequency scope
Sound wave has 180 degree phase change, wherein, particle is more, and response frequency gets over low frequency；Film is thicker (being less than in the case of 1 millimeter),
Response frequency is also lower.
Optionally, arbitrary density be more than fibrous material metallic particles or non-metallic particle for copper, iron, gold, silver, platinum, cobalt,
Nickel, lead and its corresponding oxide.
Optionally, the area of electrostatic spinning film is with being used for the syringe of spinneret in the plane perpendicular to spinneret direction
Moving range is related, and moving range is bigger, and the area of electrostatic spinning film is bigger.The thickness of electrostatic spinning film and spinning time
Related, the spinning time is longer, and the thickness of electrostatic spinning film is thicker.The diameter of electrospun fibers is related with spinning voltage, spins
Filament voltage is bigger, and the diameter of electrospun fibers is smaller.Numbers of particles and particle and high molecular material in electrostatic spinning film
Or the mass ratio of soft material solution is related, the mass ratio is bigger, and contained numbers of particles is got in the electrostatic spinning film
It is more.
It describes in detail below in conjunction with specific embodiment to phase provided by the invention regulation and control film：
Embodiment 1：
By the copper particle of 0.5 micron~1.5 microns of diameter and polyvinyl alcohol (model：PVA124) aqueous solution uniformly mixes,
The concentration of the polyvinyl alcohol water solution used is 7%~12%, and the mass ratio of copper particle and polyvinyl alcohol is according to actual demand
It is specific to adjust.
Wherein, the concentration of poly-vinyl alcohol solution in embodiments of the present invention can also be the dense of other dissolvings relatively stabilization
Degree.
Copper particle is given in embodiments of the present invention：Polyvinyl alcohol is 1:1,1:2,1:4,1:8 four kinds of situations.It will mix molten
Liquid is as raw material, and using electrostatic spinning technique, the electrostatic spinning with particle that can obtain 0.5 micron~1.5 microns of diameter is fine
Dimension, is accumulated by electrospun fibers and forms electrostatic spinning film.
The different Cu particle and the mixing liquid of polyvinyl alcohol mass ratio configured according to the present invention, the copper being uniformly mixed
After particle/polyvinyl alcohol liquid, so that it may carry out electrostatic spinning using this as raw material.In embodiments of the present invention, change and receive
Distance, spinning voltage, different-diameter and the electrostatic spinning film of distribution can be obtained by injecting the parameters such as speed.In a certain range,
Spinning voltage is bigger, and fibre diameter is smaller.The speed injected needs and the speed of spinneret (mainly electric field force and surface tension etc.
The speed of silk after balance) mutually coordinate.The spinning condition of recommendation is：25 degrees Celsius of environment temperature, humidity 30%~45%, spinning electricity
9.7kV~11.7kV is pressed, injects speed 0.02mL/s~0.03mL/s.Manufactured film surface microscopic appearance scanning electron microscope (SEM) photograph is such as
Shown in Figure 23 to Figure 26, the mass ratio of copper particle and polyvinyl alcohol is respectively 1 during electrostatic spinning film production:8,1:4,1:2,1:1.
Various concentration is more significantly different than numbers of particles as can be seen from Figure.Figure 27 to Figure 30 is respectively that the film of aforementioned proportion carries out sound wave
Transmit the result of test.It may be seen that they can in corresponding frequency range (gray area as shown in Figure 27-Figure 30)
Enough there is the phase change of 180 degree, and maintain higher transmissivity (being more than 80%).And with the increase of particle accounting,
Frequency range is gradually moved to low frequency, therefore these films cover the frequency range from 3.8kHz to 24kHz.
Embodiment 2：
By the particles of lead oxide of 0.5 micron~1.5 microns of diameter and the dimethylformamide (DMF) of polyacrylonitrile (PAN)
Solution (PAN is not soluble in water, is dissolved in organic solvent such as DMF etc.) uniformly mixes, the DMF solution concentration of the polyacrylonitrile used for
8%~12%, and particles of lead oxide and polyacrylonitrile mass ratio are specifically adjusted according to actual demand.
Wherein, the concentration of polyacrylonitrile solution in embodiments of the present invention can also be the dense of other dissolvings relatively stabilization
Degree.
Particles of lead oxide is provided in embodiments of the present invention：Polyacrylonitrile is 1:1,1:4,1:8,1:16 4 kinds of situations.It will
Mixed solution is as raw material, using electrostatic spinning technique, can obtain the electrostatic with particle of 0.5 micron~1.5 microns of diameter
Spinning fibre is accumulated by electrospun fibers and forms electrostatic spinning film.
The different particles of lead oxide and the mixing liquid of polyacrylonitrile mass ratio configured according to the present invention, are uniformly mixed
Particles of lead oxide/polyacrylonitrile mixed liquor after, so that it may using this as raw material carry out electrostatic spinning.In embodiments of the present invention,
Change and receive distance, spinning voltage, different-diameter and the electrostatic spinning film of distribution can be obtained by injecting the parameters such as speed.Centainly
In the range of, spinning voltage is bigger, and fibre diameter is smaller.The speed injected needs and the speed of spinneret (mainly electric field force and table
The speed of silk after the tension isoequilibrium of face) mutually coordinate.The spinning condition of recommendation is：25 degrees Celsius of environment temperature, humidity 30%~
45%, spinning voltage 8.7kV~10.7kV inject speed 0.03mL/s~0.04mL/s.
It is worth noting that example 2 is particles used and soft material can mutually be replaced with example 1, if necessary to last
Film is not soluble in water, then just uses polymer not soluble in water such as polyacrylonitrile；There is magnetic just use if necessary to film
Magnetic particle such as ferroso-ferric oxide etc..
Based on the electrostatic spinning film of the present invention, its thickness is controllable, and the spinning time is longer, and thickness is thicker；Stablize the thickness of film forming
It is only 20 microns that degree is most thin, to be regulated and controled wavelength 1/650, is significantly thinner than present level (about 1/250), can apply more
Scene.The shearing on electrostatic spinning film being prepared in the present invention is very convenient, and integral device is also very light, cost
It is relatively low, it is made beneficial to large-scale production.The realization method that electrostatic spinning film using the present invention regulates and controls acoustic phase
It is passive, there is advantage in energy consumption and portability.
The present invention is based on electrostatic spinning techniques to have made phase regulation and control film.Due to the vibration of particle in film, can cause
The variation of 180 degree occurs for acoustic wave transmission phase.The acoustic response frequency of film depends mainly on the density of spinning fibre and particle, mould
Measure ratio, total particle is accounted for the thickness of the mass ratio of fibrous material and film etc..And these parameters can by material mixture ratio and
Spinning parameter is adjusted.This film can large area continuously manufacture, further, this film can combine corresponding cutting
Technology is sheared and is fabricated to multi-functional device.Shearing on this fexible film is very convenient, and integral device
Also very light, cost is relatively low, is made beneficial to large-scale production.This mode is also passive, is had in energy consumption and portability
Advantage.
Optionally, the film that transmission phase can be changed to 180 degree can make electrostatic spinning film or other
Meaning can change the device or material of transmission phase；The part that phase change does not occur is the part that cut (cutting) is fallen,
Can also can not arbitrarily change transmission phase, make sound wave completely through material.
Optionally, the pattern of cutting is not limited to the described four kinds of schemes of Fig. 3, Fig. 7, Figure 11 and Figure 17, and above-mentioned 4
Kind scheme is to cut the representative of pattern, and the film provided using the present invention carries out the method for cutting transmitted acoustic pulse field distribution
It belongs in protection scope of the present invention.
Optionally, such regulation and control method is suitable for fluid media (medium), i.e., whether in air either in water or other streams
Regulation and control in body are all applicable.
Optionally, in addition to regulating and controlling to sound wave, such method is also fully applicable for the tune to light wave or electromagnetic wave
Control, it is only necessary to which the material of light-wave transmission phase can be changed by being substituted for film.
More than, it is only the preferable specific embodiment of the application, but the protection domain of the application is not limited thereto, and it is any
In the technical scope that those familiar with the art discloses in the application, the change or replacement that can readily occur in all should
Cover within the protection domain of the application.Therefore, the protection domain of the application should be subject to the protection scope in claims.
Claims (10)
- A kind of 1. method based on patterning tailoring technique regulation and control sound wave, which is characterized in that including：Determine that phase regulates and controls film, the phase change 180 degree for the sound wave that the phase regulation and control film can be transmitted；Phase regulation and control film is cut so that the sound wave field distribution after phase regulation and control film transmission after cutting Change, by control cut pattern can make the sound wave flat focus after transmission in focus or space-focusing in focus, It generates the sound stablized and propagated to be vortexed or form hyperoscillating phenomenon, so as to generate the focal spot of sub-wavelength.
- 2. the method according to claim 1 based on patterning tailoring technique regulation and control sound wave, which is characterized in that pass through control The size of cutting, the sound wave for making the sound wave behind clipping region adjacent thereto after non-clipping region transmits reach focus Wave path-difference be wave length of sound half so that after cutting phase regulation and control film transmission after sound wave flat focus in coke Point or space-focusing are in focus.
- 3. the method according to claim 1 based on patterning tailoring technique regulation and control sound wave, which is characterized in that by the phase Position regulation and control film is cut into fermat spiral pattern so that the sound wave after phase regulation and control film transmission by the cutting generates steady Surely the sound propagated is vortexed.
- 4. the method according to claim 1 based on patterning tailoring technique regulation and control sound wave, which is characterized in that by the phase Position regulation and control film is cut into the quasi-periodic pattern of Pan Luosi lattices so that the sound wave after phase regulation and control film by the cutting Hyperoscillating phenomenon is formed, so as to generate the focal spot of sub-wavelength.
- 5. the method according to claim 2 based on patterning tailoring technique regulation and control sound wave, which is characterized in that when by cutting out The sound wave flat focus after phase regulation and control film transmission after cutting include the phase regulation and control film cutting when focus：By the strip structure that is symmetrically distributed of phase regulation and control film cutting, to symmetrical centre nth bar line in symmetrical The width l of the heartnMeet：<mrow> <msub> <mi>l</mi> <mi>n</mi> </msub> <mo>=</mo> <mfrac> <mi>&lambda;</mi> <mn>2</mn> </mfrac> <msqrt> <mrow> <msup> <mi>n</mi> <mn>2</mn> </msup> <mo>+</mo> <mfrac> <mrow> <mn>4</mn> <msub> <mi>nf</mi> <mi>c</mi> </msub> </mrow> <mi>&lambda;</mi> </mfrac> </mrow> </msqrt> <mo>,</mo> <mrow> <mo>(</mo> <mi>n</mi> <mo>=</mo> <mn>0</mn> <mo>,</mo> <mn>1</mn> <mo>,</mo> <mn>2</mn> <mo>,</mo> <mo>...</mo> <mo>,</mo> <mi>N</mi> <mo>)</mo> </mrow> </mrow>Wherein, fcFor the focal length of design, λ is wave length of sound, and N is the total line number of the strip structure one side.
- 6. the method according to claim 2 based on patterning tailoring technique regulation and control sound wave, which is characterized in that when by cutting out The sound wave space-focusing after phase regulation and control film transmission after cutting includes the phase regulation and control film cutting when focus：The loop configuration that phase regulation and control film cutting is symmetrically distributed, the ring radius r of nth bar loop wirenMeet：<mrow> <msub> <mi>r</mi> <mi>n</mi> </msub> <mo>=</mo> <mfrac> <mi>&lambda;</mi> <mn>2</mn> </mfrac> <msqrt> <mrow> <msup> <mi>n</mi> <mn>2</mn> </msup> <mo>+</mo> <mfrac> <mrow> <mn>4</mn> <msub> <mi>nf</mi> <mi>c</mi> </msub> </mrow> <mi>&lambda;</mi> </mfrac> </mrow> </msqrt> <mo>,</mo> <mrow> <mo>(</mo> <mi>n</mi> <mo>=</mo> <mn>0</mn> <mo>,</mo> <mn>1</mn> <mo>,</mo> <mn>2</mn> <mo>,</mo> <mo>...</mo> <mo>,</mo> <mi>N</mi> <mo>)</mo> </mrow> </mrow>Wherein, fcFor the focal length of design, λ is wave length of sound, and N is total loop wire number of the loop configuration.
- 7. the method according to claim 3 based on patterning tailoring technique regulation and control sound wave, which is characterized in that the Fermat Spiral pattern includes two helicals, and the expression formula of two helicals meets respectively：<mrow> <msub> <mi>r</mi> <mn>1</mn> </msub> <mo>=</mo> <mi>m</mi> <msqrt> <msub> <mi>&theta;</mi> <mn>1</mn> </msub> </msqrt> <mo>,</mo> <mrow> <mo>(</mo> <mn>0</mn> <mo>&le;</mo> <msub> <mi>&theta;</mi> <mn>1</mn> </msub> <mo>&le;</mo> <mn>9</mn> <mi>&pi;</mi> <mo>)</mo> </mrow> <mo>,</mo> </mrow><mrow> <msub> <mi>r</mi> <mn>2</mn> </msub> <mo>=</mo> <mi>m</mi> <msqrt> <mrow> <msub> <mi>&theta;</mi> <mn>2</mn> </msub> <mo>-</mo> <mi>&pi;</mi> </mrow> </msqrt> <mo>,</mo> <mrow> <mo>(</mo> <mi>&pi;</mi> <mo>&le;</mo> <msub> <mi>&theta;</mi> <mn>2</mn> </msub> <mo>&le;</mo> <mn>9</mn> <mi>&pi;</mi> <mo>)</mo> </mrow> <mo>,</mo> </mrow>Wherein, m is linear coefficient, r1And r2The polar diameter of respectively two helicals, θ1And θ2The polar angle of respectively two helicals.
- 8. the method according to claim 7 based on patterning tailoring technique regulation and control sound wave, which is characterized in that pass through selection Suitable m is vortexed so that can generate stable sound after phase regulation and control film transmission of the sound wave by cutting of different wave length.
- 9. the method according to claim 4 based on patterning tailoring technique regulation and control sound wave, which is characterized in that the Pan Luo The quasi-periodic pattern of this lattice is combined by two kinds of diamond shapes, and the acute angles of described two diamond shapes is respectively 36 degree and 72 degree, described two Diamond shape is combined into is paved with the phase regulation and control thin film planar similar to pentagonal quasi-periodic pattern, and the circular hole cut out is located at two kinds On the vertex of diamond shape.
- 10. according to method of claim 1 to 9 any one of them based on patterning tailoring technique regulation and control sound wave, feature exists In, determine that phase regulates and controls film, including：Arbitrary density is less than to the macromolecule material of particle more than the metallic particles or non-metallic particle of fibrous material and arbitrary modulus Material or soft material solution are uniformly mixed to get mixed solution；Using mixed solution as raw material, using electrostatic spinning technique, the electrospun fibers with particle are obtained, and then by Static Spinning Silk fiber is accumulated to form electrostatic spinning film, and the electrostatic spinning film is the phase regulation and control film.
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