CN201570995U - Sound absorption and noise reduction device based on ferroelectric materials - Google Patents
Sound absorption and noise reduction device based on ferroelectric materials Download PDFInfo
- Publication number
- CN201570995U CN201570995U CN2009202948639U CN200920294863U CN201570995U CN 201570995 U CN201570995 U CN 201570995U CN 2009202948639 U CN2009202948639 U CN 2009202948639U CN 200920294863 U CN200920294863 U CN 200920294863U CN 201570995 U CN201570995 U CN 201570995U
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- cantilever beam
- lamina rara
- rara externa
- sound wave
- rear end
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Abstract
The utility model relates to a device which utilizes ferroelectric materials to absorb the outside noise. The existing acoustic celotex boards have the defects of large thickness and low noise reduction efficiency. In the utility model, a plurality of cantilever beams are arranged at the inside of a front end outer plate along the horizontal direction and the vertical direction at an equal distance, wherein a ferroelectric film is arranged at the center of the upper surface of each cantilever beam, one end of the cantilever beam is vertically and fixedly arranged with the front end outer plate, and the other end thereof is vertically and fixedly arranged with a capture soundwave plate which is a platy square plate, the side length of the square is smaller than the space between two adjacent cantilever beams, and all the capture soundwave plates are arranged on one plane which is parallel to the front end outer plate; the cantilever beams, the ferroelectric films and the capture soundwave plates are arranged on a rear end outer plate in the same way as being arranged on the front end outer plate; and the front and the rear end outer plates are arranged in a parallel staggering way. The utility model not only improves the sound absorption and noise reduction efficiency, but also reduces the thickness of the device.
Description
Technical field
The utility model belongs to material, the energy and electronic technology field, is specifically related to a kind of device that utilizes ferroelectric material to absorb outside noise.
Background technology
Along with human life quality's progressively raising, the problem of noise pollution displays thereupon, and its same air pollution, water pollute becomes one of society's three big public hazards together.Noise not only endangers people's live and work environment, and influences people's physical and mental health, infringement instrument and equipment.Therefore, the noise reduction by absorption ability that how to improve a sheet material hot issue having become present society and be concerned about.
Along with the fast development of social rhythm and the raising of people's quality of life, city noise is more and more stronger, sound insulating sheet material noise abatement Capability Requirement is the bigger the better, and to reduce sound insulating sheet material thickness, just require the harm that sound insulating sheet material is brought in the certain situation of its thickness reduction noise source as much as possible.What tradition adopted is sound insulating sheet material, and this material belongs to the acoustic material of specialty, and both sides are to be the foamed plastic with deadening in the middle of the sheet metal, the big more soundproof effect of this sheet metal thickness is just good more, but sheet material thickness is big more, and demand space is just big more, reduces usage space.That is to say that its acoustically effective is subjected to the restriction of sheet metal thickness, noise abatement efficient is low, so range of application can be subjected to certain restriction.Therefore, how improving the acoustical absorptivity of sheet material, reduce sheet metal thickness, is urgent problem.
Along with development of material technology, the application of intellectual material in fields such as electronics is subjected to increasing attention.Particularly ferroelectric material under the effect of external force, no longer overlaps owing to deformation causes the positive and negative charge center, brings out electric polarization and polarization upset at material internal, makes ferroelectric material two ends surface charging.The electric polarization of ferroelectric material and input strain present certain non-linear hysteresis characteristic, and no matter are that stretching strain or compressive strain all can produce electric polarization.Utilize ferroelectric material that the character that noise energy is converted into electric energy can be accomplished to absorb the function of outside noise, so can be introduced into the sound-absorbing and noise-decreasing field.
Summary of the invention
The utility model proposes a kind of sound-absorbing and noise-decreasing device based on ferroelectric material at the defective of existing sheet material noise abatement ability.The noise abatement sound absorber that the utility model proposes adopts ferroelectric thin film as machine-electric transducer, has effectively improved the absorption to the noise sound wave, can improve noise reduction function greatly when lowering sheet metal thickness.
The utility model solves the problems of the technologies described above the technical scheme of being taked:
A kind of sound-absorbing and noise-decreasing device based on ferroelectric material comprises front end lamina rara externa, rear end lamina rara externa, cantilever beam, ferroelectric thin film and catches the sound wave plate.
The inboard of front end lamina rara externa is along the equidistant multi-disc cantilever beam that is provided with on level and the vertical direction, every cantilever beam upper surface middle position is provided with ferroelectric thin film, one end of cantilever beam and front end lamina rara externa vertical fixing are provided with, the other end with catch the setting of sound wave plate vertical fixing, catching the sound wave plate is the sheet facing, the foursquare length of side is less than the spacing between the adjacent cantilever beam, all catch the sound wave plate all on a plane and this plane parallel with the front end lamina rara externa;
The inboard of rear end lamina rara externa is along the equidistant multi-disc cantilever beam that is provided with on level and the vertical direction, every cantilever beam upper surface middle position is provided with ferroelectric thin film, one end of cantilever beam and rear end lamina rara externa vertical fixing are provided with, the other end with catch the setting of sound wave plate vertical fixing, catching the sound wave plate is the sheet facing, the foursquare length of side is less than the spacing between the adjacent cantilever beam, all catch the sound wave plate all on a plane and this plane parallel with the rear end lamina rara externa;
Front end lamina rara externa and rear end lamina rara externa be arranged in parallel, and the distance between front end lamina rara externa and the rear end lamina rara externa is greater than the cantilever beam length of twice, and the cantilever beam on cantilever beam on the front end lamina rara externa and the rear end lamina rara externa is staggered and is provided with;
The described mode of being crisscross arranged is that the cantilever beam correspondence on the front end lamina rara externa is arranged on the foursquare center that adjacent four cantilever beams on the lamina rara externa of rear end are formed.
Mentality of designing of the present utility model: the cantilever beam that contains ferroelectric thin film is the core parts of absorption of noise, the strain that ferroelectric thin film produces by the cantilever beam weak vibration, in ferroelectric thin film, bring out the electric polarization upset, produce electric field, the mechanical energy of deformation that extraneous sound wave causes is converted into the electric energy of ferroelectric thin film.The charge concentration that electric polarization produces is distributed in the top and the bottom of ferroelectric thin film.By the polarization upset and the electric polarization size of strain-induced, the electric energy that ferroelectric thin film produced can be consumed by connected stressed iron plate in the ferroelectric thin film, also can utilize the energy capture principle that it is used other places.
The beneficial effects of the utility model: the utility model adopts ferroelectric material that sound wave is converted into the noise reduction by absorption mode that electric energy consumes electric energy then, thereby has improved the efficient of noise reduction by absorption significantly, can absorb the sound wave harm that big noise source is brought.Can reduce sheet metal thickness greatly.In addition, the electric energy that can also produce ferroelectric thin film as required is used, and reaches insulation effect by consuming the generation heat, the electric energy that all ferroelectric thin films produce can also be integrated into indoor simple illumination the energy is provided.That this noise reduction by absorption body of wall has is simple in structure, the noise reduction by absorption ability is big, body of wall is frivolous, is easy to standardization, advantage applied widely.Can be widely used in family room's interior decoration, cut off, laboratory sound insulation, numerous places and field uses such as hospital's sound insulation.
Description of drawings
Fig. 1 is the utility model side cutaway view;
Fig. 2 is the utility model top plan view;
Fig. 3 is for cantilever beam in the utility model and catch the sound wave plate schematic diagram is set.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, a kind of sound-absorbing and noise-decreasing device based on ferroelectric material comprises front end lamina rara externa 1, rear end lamina rara externa 5, cantilever beam 2, ferroelectric thin film 4 and catches sound wave plate 3.
Front end lamina rara externa 1 is an iron plate.The inboard of the outer iron plate of front end is along the equidistant multi-disc cantilever beam 2 that is provided with on level and the vertical direction, cantilever beam 2 is an iron plate, long is 18mm, wide 10mm, thick 0.5mm, every iron plate cantilever beam 2 upper surface middle positions are provided with ferroelectric thin film 4, ferroelectric thin film 4 adopts the electric barium strontium titanate ferroelectric film that is mixed with impurity, ferroelectric thin film 4 length are 15mm, and wide is 10mm, thick 1mm, the outer iron plate vertical fixing of one end of iron plate cantilever beam 4 and front end is provided with, the other end with catch the 3 vertical fixing settings of sound wave plate, catch sound wave plate 3 and be sheet facing iron plate, plate is long to be 60mm, wide 60mm, thick 0.5mm, the foursquare length of side is slightly less than the spacing between the adjacent iron plate cantilever beam, all catch sound wave iron plate plate all on a plane and this plane parallel with the outer iron plate of front end;
Rear end lamina rara externa 5 also adopts iron plate, the inboard of this iron plate is along the equidistant multi-disc iron plate cantilever beam that is provided with on level and the vertical direction, every iron plate cantilever beam upper surface middle position is provided with ferroelectric thin film, the outer iron plate vertical fixing in one end of iron plate cantilever beam and rear end is provided with, the other end with catch the setting of sound wave iron plate plate vertical fixing, catching sound wave iron plate plate is the sheet facing, the foursquare length of side is less than the spacing between the adjacent iron plate cantilever beam, all catch sound wave iron plate plate all on a plane and this plane parallel with the outer iron plate in rear end;
The outer iron plate of outer iron plate of front end and rear end be arranged in parallel, distance between the outer iron plate of outer iron plate of front end and rear end is greater than the iron plate cantilever beam length of twice, and the iron plate cantilever beam on the outer iron plate of iron plate cantilever beam on the outer iron plate of front end and rear end is staggered and is provided with; The mode of being crisscross arranged is that the iron plate cantilever beam correspondence on the outer iron plate of front end is arranged on the foursquare center that adjacent four the iron plate cantilever beams on the outer iron plate in rear end are formed.
The course of work of the utility model device is: when extraneous sound wave imports into, sound wave is at first by the outer iron plate of front end, affact then and catch on the sound wave iron plate plate, make and catch sound wave iron plate plate generation deformation, since the iron plate cantilever beam with catch that sound wave iron plate plate links to each other and its width to catch sound wave iron plate plate little, therefore will produce bigger deformation, make the ferroelectric thin film that pastes on the iron plate cantilever beam also produce certain deformation simultaneously, ferroelectric thin film is subjected to the influence of strain variation, generating electrodesization and polarization upset, thereby the electric weight that ferroelectric thin film is produced concentrates on the top and the bottom of ferroelectric thin film, and this moment, ferroelectric thin film had the indefinite alternating current output of peak value.At this moment can this part electric consumption be fallen or the electric energy unification be used by catching sound wave iron plate plate by the external electrode line.Utilize mode shown in Figure 3 to arrange and iron plate cantilever beam and catch sound wave iron plate plate can guarantee to absorb whole sources sound wave.
Claims (1)
1. sound-absorbing and noise-decreasing device based on ferroelectric material, comprise the front end lamina rara externa, the rear end lamina rara externa, cantilever beam, ferroelectric thin film and catch the sound wave plate, it is characterized in that: the inboard of front end lamina rara externa is along the equidistant multi-disc cantilever beam that is provided with on level and the vertical direction, every cantilever beam upper surface middle position is provided with ferroelectric thin film, one end of cantilever beam and front end lamina rara externa vertical fixing are provided with, the other end with catch the setting of sound wave plate vertical fixing, catching the sound wave plate is the sheet facing, the foursquare length of side is less than the spacing between the adjacent cantilever beam, all catch the sound wave plate all on a plane and this plane parallel with the front end lamina rara externa;
The inboard of rear end lamina rara externa is along the equidistant multi-disc cantilever beam that is provided with on level and the vertical direction, every cantilever beam upper surface middle position is provided with ferroelectric thin film, one end of cantilever beam and rear end lamina rara externa vertical fixing are provided with, the other end with catch the setting of sound wave plate vertical fixing, catching the sound wave plate is the sheet facing, the foursquare length of side is less than the spacing between the adjacent cantilever beam, all catch the sound wave plate all on a plane and this plane parallel with the rear end lamina rara externa;
Front end lamina rara externa and rear end lamina rara externa be arranged in parallel, and the distance between front end lamina rara externa and the rear end lamina rara externa is greater than the cantilever beam length of twice, and the cantilever beam on cantilever beam on the front end lamina rara externa and the rear end lamina rara externa is staggered and is provided with;
The described mode of being crisscross arranged is that the cantilever beam correspondence on the front end lamina rara externa is arranged on the foursquare center that adjacent four cantilever beams on the lamina rara externa of rear end are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202948639U CN201570995U (en) | 2009-12-18 | 2009-12-18 | Sound absorption and noise reduction device based on ferroelectric materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202948639U CN201570995U (en) | 2009-12-18 | 2009-12-18 | Sound absorption and noise reduction device based on ferroelectric materials |
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| Publication Number | Publication Date |
|---|---|
| CN201570995U true CN201570995U (en) | 2010-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202948639U Expired - Lifetime CN201570995U (en) | 2009-12-18 | 2009-12-18 | Sound absorption and noise reduction device based on ferroelectric materials |
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| CN (1) | CN201570995U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787750B (en) * | 2009-12-18 | 2011-04-20 | 杭州电子科技大学 | Sound-absorbing and noise-decreasing device based on ferroelectric material |
| CN103236802A (en) * | 2013-05-02 | 2013-08-07 | 东华大学 | Sound energy power generation device |
-
2009
- 2009-12-18 CN CN2009202948639U patent/CN201570995U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787750B (en) * | 2009-12-18 | 2011-04-20 | 杭州电子科技大学 | Sound-absorbing and noise-decreasing device based on ferroelectric material |
| CN103236802A (en) * | 2013-05-02 | 2013-08-07 | 东华大学 | Sound energy power generation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100901 Effective date of abandoning: 20091218 |