CN206862489U - A kind of acoustic resonator using multi-layer-coupled phonon crystal - Google Patents
A kind of acoustic resonator using multi-layer-coupled phonon crystal Download PDFInfo
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- CN206862489U CN206862489U CN201720536536.4U CN201720536536U CN206862489U CN 206862489 U CN206862489 U CN 206862489U CN 201720536536 U CN201720536536 U CN 201720536536U CN 206862489 U CN206862489 U CN 206862489U
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Abstract
The utility model belongs to acoustic function devices field, disclose a kind of acoustic resonator using multi-layer-coupled phonon crystal, formed by multiple different scattering object sizes are nested with the two-dimension phonon crystal of different crystalline lattice coefficient, from the inside to the outside, first layer phonon crystal is to be made up of center for 3 × 3 scattering volume arrays of single-point vacancy defect, second layer phonon crystal is made up of 2 × 2 scattering volume arrays, third layer phonon crystal is to be made up of center for 3 × 3 scattering volume arrays of single-point vacancy defect, 4th layer of phonon crystal is to be made up of center for 5 × 5 scattering volume arrays of multiple spot vacancy defect.The utility model can realize the efficient detection and capture of faint sound wave；Compared with the single phonon crystal of same volume, multi-layer-coupled phonon crystal has stronger acoustic localization effect, higher acoustic pressure multiplication factor.
Description
Technical field
The utility model belongs to novel acoustic function element field, and in particular to a kind of using multi-layer-coupled phonon crystal
Acoustic resonator, for realizing efficient detection, sensing and capture to faint sound wave.
Background technology
Phonon crystal is as a kind of new synthetic material or structure, because of its acoustic band gap characteristic with uniqueness
Be used to design, develop sound insulation and noise reduction material (such as：Chinese utility model patent CN104389935A, CN104141722A,
CN104538019A etc.).In addition, correlative study in the recent period shows that the pass-band performance of phonon crystal contains abundant physical effect,
Wherein acoustic localization effect receives significant attention.Because acoustic localization effect has the characteristics of sound wave capture, acoustic pressure amplification,
So the acoustic resonator of the effect development based on phonon crystal can be utilized.The production of current phonon crystal acoustic localization effect
Life mainly has three kinds of modes：(1) vacancy defect is manufactured, that is, removes some scattering objects, destroys the cycle of scattering object in phonon crystal
Property；(2) impurity or other scattering objects are mixed, break the purity and spatial symmetry of phonon crystal；(3) unsymmetrical knot is designed
Structure.Because stronger acoustic pressure amplifying power is one of important indicator of acoustic resonator superperformance, need to strengthen phonon
The acoustic localization ability of crystal.For acoustic localization effect caused by three of the above type, increasing the number of scattering object is
Current relatively effective means.However, scattering object increases the increase for meaning phonon crystal overall volume, in addition with scattering
Body number increases, and the enhancing effect of acoustic localization harmony pressure amplifying power constantly weakens.How in limited device volume
In the range of, it is that the weight of acoustic resonator is developed using phonon crystal to realize powerful acoustic localization effect, sound wave amplifying power
Want one of problem.
Utility model content
Above-mentioned condition based on prior art, the utility model discloses a kind of sound wave using multi-layer-coupled phonon crystal
Resonator, efficient detection, sensing and the capture of faint sound wave are realized with this.
The utility model realized by following technical proposals, a kind of sound wave resonance using multi-layer-coupled phonon crystal
Device, formed by multiple different scattering object sizes are nested with the two-dimension phonon crystal of different crystalline lattice coefficient.
Specifically, including four layers of two-dimension phonon crystal, from the inside to the outside, it by center is that single-point is empty that first layer phonon crystal, which is,
3 × 3 scattering volume arrays of position defect are formed, and second layer phonon crystal is made up of 2 × 2 scattering volume arrays, and third layer phonon is brilliant
Body is to be made up of center for 3 × 3 scattering volume arrays of single-point vacancy defect, and it by center is multiple spot room that the 4th layer of phonon crystal, which is,
5 × 5 scattering volume arrays of defect are formed.
The scattering object that four layers of photonic crystal structure are selected all is sound-hard material PMMA and cross-sectional area is all circle, its
Lattice shape is square, and substrate is air.When Acoustic Wave Propagation enters the acoustic resonator, first and second layer of phonon crystal
With band the defects of third and fourth layer of phonon crystal cross-couplings effect occurs for passband, causes the sound wave of multiple scattering in first layer sound
Strong in-phase stacking effect occurs in sub- germ nucleus cavity, and acoustic pressure is exaggerated strongly at this, acoustic energy is accumulated, so as to
Form extremely strong acoustic localization effect, acoustic pressure amplifying power.
In a kind of embodiment of the utility model, the shape of cross section of phonon crystal scattering object can be selected else as triangle, ten
Letter stencil type.
In a kind of embodiment of the utility model, phonon crystal diffuser material can be selected else as steel, plastics, plank.
In a kind of embodiment of the utility model, the lattice shape of phonon crystal can be selected else as triangle, rectangle.
In a kind of embodiment of the utility model, the space dimensionality of phonon crystal can be selected else as three-dimensional, by each phonon crystal
Three dimensions nesting is together.
In a kind of embodiment of the utility model, the phonon crystal number of plies can increase to five layers, six layers.
The characteristics of the utility model and advantage are：
(1) multi-layer-coupled photonic crystal structure is used, it is possible to achieve the efficient detection of faint sound wave and capture.With same volume
Single phonon crystal compare, multi-layer-coupled phonon crystal has stronger acoustic localization effect, higher acoustic pressure times magnification
Number.
(2) compared with the single photonic crystal structure with same sound pressure amplifying power, the multi-layer-coupled phonon of use is brilliant
Body structure has smaller volume, has saved space and cost.
(3) due to the symmetry of structure, the multi-layer-coupled photonic crystal structure used can be with significant response multiple directions
Sound wave.
According to These characteristics, it can apply to efficient detection, sensing and the capture of faint sound wave.
Brief description of the drawings
Fig. 1 is acoustic resonator three dimensional structure diagram of the present utility model；
Fig. 2 is acoustic resonator two-dimensional structure schematic diagram of the present utility model；
Fig. 3 is the two-dimensional structure schematic diagram of first layer phonon crystal in the utility model；
Fig. 4 is the two-dimensional structure schematic diagram of second layer phonon crystal in the utility model；
Fig. 5 is the two-dimensional structure schematic diagram of third layer phonon crystal in the utility model；
Fig. 6 is the two-dimensional structure schematic diagram of the 4th layer of phonon crystal in the utility model；
In accompanying drawing：First layer phonon crystal 1, second layer phonon crystal 2, third layer phonon crystal 3, the 4th layer of phonon crystal
4.First layer phonon crystal 1 include scattering object 1-1,1-2 ..., 1-8 and cavity 1-9, second layer phonon crystal 2 include scattering object
2-1,2-2,2-3,2-4 and cavity 2-5, third layer phonon crystal 3 include scattering object 3-1,3-2 ..., 3-8 and cavity 3-9, the
Four layers of phonon crystal 4 include scattering object 4-1,4-2 ..., 4-16 and cavity 4-17.
Embodiment
The utility model is further clarified below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, using multi-layer-coupled photonic crystal structure acoustic resonator by first layer phonon crystal 1,
Second layer phonon crystal 2, third layer phonon crystal 3, the 4th layer of nesting of phonon crystal 4 form.As shown in Fig. 1 and Fig. 3-6, first
Layer phonon crystal 1 is positioned in the cavity 2-5 of second layer phonon crystal 2, and second layer phonon crystal 2 is positioned over third layer phonon crystalline substance
In the cavity 3-9 of body 3, third layer phonon crystal 3 is positioned in the cavity 4-17 of the 4th layer of phonon crystal 4.
First layer phonon crystal 1 include scattering object 1-1,1-2 ..., 1-8 and cavity 1-9, scattering object 1-1,1-2 ..., 1-8
By 3 × 3 arrays.Second layer phonon crystal 2 includes scattering object 2-1,2-2,2-3,2-4 and cavity 2-5, scattering object 2-1,2-2,2-
3rd, 2-4 presses 2 × 2 arrays.Third layer phonon crystal 3 include scattering object 3-1,3-2 ..., 3-8 and cavity 3-9, scattering object 3-1,3-
2nd ..., 3-8 presses 3 × 3 arrays.4th layer of phonon crystal 4 include scattering object 4-1,4-2 ..., 4-16 and cavity 4-17, scattering object
4-1,4-2 ..., 4-16 press 5 × 5 arrays.Scattering object 1-1,1-2 ..., 1-8,2-1,2-2,2-3,2-4,3-1,3-2 ..., 3-
8th, 4-1,4-2 ..., 4-16 material be PMMA；Cavity 1-9,2-5,3-9,4-17 material are air.
Another embodiment, the shape of cross section of each phonon crystal scattering object can be triangle, cross template, for substituting
It is circular.
Another embodiment, each phonon crystal diffuser material can use steel, plastics, plank.
Triangle, rectangle can be selected in another embodiment, the lattice shape of each phonon crystal.
Another embodiment, the space dimensionality of phonon crystal can be three-dimensional, make on the phonon crystal of above-mentioned two dimension arrangement
Three-dimensional extended.
Another embodiment, the phonon crystal number of plies can increase to five layers, six layers, even more more, to obtain putting of needing
Big coefficient.
In above-mentioned example, when incident acoustic wave passes through the 4th layer of phonon crystal 4, third layer phonon crystal 3, second layer sound successively
When sub- crystal 2, first layer phonon crystal 1, because multiple scattering occurs for Bragg effect, multiple scattering sound wave is formed.When each layer
When coupling intersection occurs for the passband of the band structure of phonon crystal, through multiple scattering ripple caused by each layer phonon crystal scattering process
Generation coupling, the in-phase stacking of multiple scattering ripple is finally formed in first layer phonon crystal cavity, acoustic pressure is by consumingly
Amplification, sound wave are limited in herein, so as to form strong acoustic localization effect.Hereby it is achieved that to the efficient of faint sound wave
Detection, sensing and capture.
Claims (5)
1. a kind of acoustic resonator using multi-layer-coupled phonon crystal, it is characterized in that：By four different scattering object sizes and not
Two-dimension phonon crystal nesting with lattice coefficient forms, and from the inside to the outside, first layer phonon crystal is to be lacked by center for single-point room
3 × 3 sunken scattering volume arrays are formed, and second layer phonon crystal is made up of 2 × 2 scattering volume arrays, and third layer phonon crystal is
It is made up of center for 3 × 3 scattering volume arrays of single-point vacancy defect, it by center is multiple spot vacancy defect that the 4th layer of phonon crystal, which is,
5 × 5 scattering volume arrays form.
2. the acoustic resonator according to claim 1 using multi-layer-coupled phonon crystal, it is characterized in that：Phonon crystal
Scattering object uses sound-hard material PMMA.
3. the acoustic resonator according to claim 1 using multi-layer-coupled phonon crystal, it is characterized in that：Phonon crystal
Scattering object material uses steel.
4. the acoustic resonator according to claim 1 using multi-layer-coupled phonon crystal, it is characterized in that：Phonon crystal
Scattering object material uses plank.
5. the acoustic resonator according to claim 1 using multi-layer-coupled phonon crystal, it is characterized in that：Phonon crystal
Scattering object shape of cross section is circle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720536536.4U CN206862489U (en) | 2017-05-09 | 2017-05-09 | A kind of acoustic resonator using multi-layer-coupled phonon crystal |
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| CN201720536536.4U CN206862489U (en) | 2017-05-09 | 2017-05-09 | A kind of acoustic resonator using multi-layer-coupled phonon crystal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091686A (en) * | 2017-05-09 | 2017-08-25 | 国网江西省电力公司电力科学研究院 | A kind of acoustic resonator of use multi-layer-coupled phonon crystal |
| CN113108002A (en) * | 2021-04-23 | 2021-07-13 | 天津大学 | Stereo-form phononic crystal vibration isolation and noise reduction device with particle damping characteristic |
-
2017
- 2017-05-09 CN CN201720536536.4U patent/CN206862489U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091686A (en) * | 2017-05-09 | 2017-08-25 | 国网江西省电力公司电力科学研究院 | A kind of acoustic resonator of use multi-layer-coupled phonon crystal |
| CN113108002A (en) * | 2021-04-23 | 2021-07-13 | 天津大学 | Stereo-form phononic crystal vibration isolation and noise reduction device with particle damping characteristic |
| CN113108002B (en) * | 2021-04-23 | 2022-12-13 | 天津大学 | Stereo-form photonic crystal vibration isolation and noise reduction device with particle damping characteristic |
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