CN108882107B - A kind of sound equipment of high tone quality - Google Patents
A kind of sound equipment of high tone quality Download PDFInfo
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- CN108882107B CN108882107B CN201811019916.6A CN201811019916A CN108882107B CN 108882107 B CN108882107 B CN 108882107B CN 201811019916 A CN201811019916 A CN 201811019916A CN 108882107 B CN108882107 B CN 108882107B
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- module
- master control
- control borad
- mxene
- sound equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/03—Connection circuits to selectively connect loudspeakers or headphones to amplifiers
Abstract
The present invention relates to a kind of sound equipments of high tone quality, including cabinet and master control borad, loudspeaker is provided on the cabinet, the master control borad is arranged in box house, the master control borad includes microprocessor module, Audio Input Modules, D/A conversion module, power amplifier module and control electric appliance, controls electric appliance as device and provides power supply, Audio Input Modules are connected with microprocessor module, microprocessor module is connected with D/A conversion module, and D/A conversion module is connected with power amplifier module；Each module on the master control borad is equipped with electromagnetic shielding cover, and each module is protected by extraneous and intermodule electromagnetic interference, not improve acoustical quality.
Description
Technical field
The present invention relates to field of audio more particularly to a kind of sound equipments of high tone quality.
Background technique
Sound equipment be it is a kind of audio electric energy is converted to the device that sound can and be radiated to space, be the important composition for broadcasting sound system
Part, on the one hand, for the working environment of sound equipment close to various electrical equipments, each module of master control borad is highly prone to external electromagnetic radiation
Interference causes noise；On the other hand, the interference that electromagnetic radiation can be also generated between each module of master control borad, reduces acoustic product
Psycho-acoustical quality.The prior art is to wrap up the electromagnetic shielding material containing metallic fiber or carbon nanotube, patent in casing of sound equipment
CN202940936U discloses a kind of sound equipment with electro-magnetic screen function, and head unit is wrapped with filling conductive fiber
Resin layer is as shield shell, but electromagnet shield effect is poor, not only influences sound equipment appearance, can not also shield each module of master control borad
Between the electromagnetic interference that generates.
Summary of the invention
The present invention is intended to provide a kind of sound equipment of high tone quality, set forth above to solve the problems, such as.
A kind of sound equipment of high tone quality, including cabinet and master control borad are provided in the embodiment of the present invention, are set on the cabinet
Be equipped with loudspeaker, the master control borad is arranged in box house, the master control borad include microprocessor module, Audio Input Modules,
D/A conversion module, power amplifier module and control electric appliance, control electric appliance as device and provide power supply, Audio Input Modules and microprocessor module
It is connected, microprocessor module is connected with D/A conversion module, and D/A conversion module is connected with power amplifier module；It is each on the master control borad
Module, which is equipped with, is equipped with electromagnetic shielding film with the matched the cover of block size, the cover outer patch, and the electromagnetic shielding film is to apply
It is covered with the pad pasting of electromagnetic screen coating；
Preferably, the electromagnetic screen coating is by filler: film-forming resin: diluent: coupling agent: dispersing agent example in mass ratio
150-200:100:30-50:1:3 is mixed to prepare；
Preferably, the filler is the modified MXene in surface；The film-forming resin is epoxy resin；The coupling agent is silicon
Alkane coupling agent；The dispersing agent is organobentonite；
Preferably, the modified MXene in the surface includes MXene carrier and load layer, and load layer includes zinc oxide phase, carbon phase
With titanium dioxide phase；
It is further preferred that the MXene carrier is that sintering titanium aluminum carbide is etched through the hydrofluoric acid solution containing lithium ion
It arrives；The carbon phase and titanium dioxide are mutually obtained by MXene carrier through carbon dioxide high-temperature oxydation；The zinc oxide is mutually by MXene
Carrier is obtained through zinc ion load, hydrazine hydrate reduction, carbon dioxide high-temperature oxydation；
It is further preferred that the hydrofluoric acid solution containing lithium ion is the concentrated hydrochloric acid solution dissolved with lithium fluoride, it is fluorinated lithium concentration
For 0.05g/ml；
It is further preferred that sintering titanium aluminum carbide is made by titanium, aluminium, titanium carbide 5:3:20 in mass ratio through high temperature sintering；
It is further preferred that carbon dioxide high-temperature oxidation process temperature is 850 DEG C, soaking time 60min, carbon dioxide stream
Measure 150ml/min.
The technical solution that the embodiment of the present invention provides can include the following benefits:
By the way that electromagnetic shielding cover is arranged in each module on master control borad, protect each module not by intermodule and the external world
Electromagnetic interference improves acoustical quality, by providing bigger surface and interface to MXene surface microstructure Modification design, drops
Contact resistance caused by low stacking and dimensional effect, enhances electric conductivity, increases electromagnetic wave propagation path, promote its decaying,
Impedance matching is improved, effective absorption band is widened, improves electromagnetic absorption performance.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.It should be understood that above general description and following detailed description are only
Be it is exemplary and explanatory, the present invention can not be limited.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings, but the embodiment in attached drawing is not constituted to any limit of the invention
System, for those of ordinary skill in the art, without creative efforts, can also obtain according to the following drawings
Other attached drawings.
Fig. 1 is module connection structure schematic diagram of the invention.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
Electromagnetic radiation is called electronic smoke, is the phenomenon that energy is emitted to space with electromagnetic wave, electronics and information industry
Fast development, be greatly promoted the universal of wireless telecom equipment and high-frequency electron device, also result in the electricity got worse
Magnetic disturbance and electromagnetic pollution not only interfere the normal work of electronic component, and potential health danger can be also caused to human body
Evil, electromagenetic wave radiation are listed in the fourth-largest pollution sources after water source, atmosphere, noise, long-term excessive electromagnetic radiation meeting pair
Human body reproduction, nerve and immune system etc. damage.
Electromagnetic shielding material can absorb the electromagnetic wave issued with reflective electron equipment to a certain extent, be developed
A variety of electromagnetic shielding materials are to eliminate electromagnetic pollution, and traditional electromagnetic shielding material uses the metals such as copper, aluminium to manufacture more, high density
It is limited in the application of the multiple fields such as movable equipment, wearable electronic product and physical protection, Qi Taru with large volume
Nickel cobalt metallic fiber is overlying on to paraffin based composites, the carbonization silicon sponge, graphene-dimethyl silicone polymer of biological Carbon fibe
Composite sponge, it is big that there are density, using the wide disadvantage of thickness, therefore, develops light, high tenacity and the strong electromagnetic screen of machinability
Covering material and product will be with important research significance and practical application value.
MXene is a kind of two-dimentional new material with class graphene-structured, special metalloid characteristic and stratiform knot
Structure makes it have potential application in electromagnetic shielding field, but its absorbing property is unsatisfactory, this is with material with the phase interaction of electromagnetic wave
Related with mechanism and impedance matching capability, exploitation lightweight, broad absorption band be wide, high-absorbility MXene class material, need to its into
Row microstructure design surface is modified to promote Absorbing Materials.
The embodiment of the present invention is related to a kind of sound equipment of high tone quality, including cabinet and master control borad, is provided on the cabinet
Loudspeaker, the master control borad are arranged in box house, and the master control borad includes microprocessor module, Audio Input Modules, D/A turns
Block, power amplifier module and control electric appliance are changed the mold, electric appliance is controlled as device and power supply is provided, Audio Input Modules are connected with microprocessor module,
Microprocessor module is connected with D/A conversion module, and D/A conversion module is connected with power amplifier module；Each module on the master control borad
Be equipped with the matched the cover of block size, the cover outer patch be equipped with electromagnetic shielding film, the electromagnetic shielding film be coated with
The pad pasting of electromagnetic screen coating；
Preferably, the electromagnetic screen coating is by filler: film-forming resin: diluent: coupling agent: dispersing agent example in mass ratio
150-200:100:30-50:1:3 is mixed to prepare；
Preferably, the filler is the modified MXene in surface；The film-forming resin is epoxy resin；The coupling agent is silicon
Alkane coupling agent；The dispersing agent is organobentonite；
Preferably, the modified MXene in the surface includes MXene carrier and load layer, and load layer includes zinc oxide phase, carbon phase
With titanium dioxide phase；
It is further preferred that the MXene carrier is that sintering titanium aluminum carbide is etched through the hydrofluoric acid solution containing lithium ion
It arrives；The carbon phase and titanium dioxide are mutually obtained by MXene carrier through carbon dioxide high-temperature oxydation；The zinc oxide is mutually by MXene
Carrier is obtained through zinc ion load, hydrazine hydrate reduction, carbon dioxide high-temperature oxydation；
As oxidant and oxidizing condition is controlled using carbon dioxide, part oxygen while keeping the lamellar structure of MXene carrier
Change, in its Surface Creation carbon phase and titanium dioxide phase, improves conductivity and impedance matching, intrinsic defect increases dipole polarization；It carves
Obtained MXene carrier surface is lost with electron rich group, is easily combined, is reduced in the form of electrostatic or complexing with zinc metal ion
Radical position, enhancing is conductive, then is reduced to Metal Supported in MXene carrier surface, and zinc oxide is that a kind of direct band gap is wide
Bandgap semiconductor has low dielectric constant, can form the heterogeneous of multiple class fish scales with titanium dioxide phase, carbon phase, MXene carrier
Interface shows high dielectric loss, hinders the effective mobility of electronics in the structure, under the action of electromagnetic wave, material surface
The a large amount of charges inspired are assembled at the hetero-junctions of interface, form space charge doping region, form scattering effect to electron transfer,
Dielectric dipolar interaction and relevant relaxation effect are generated, dissipative electromagnetic wave, performance is better than single-phase MXene carrier or respectively
Ingredient is simply mixed；
It is further preferred that the hydrofluoric acid solution containing lithium ion is the concentrated hydrochloric acid solution dissolved with lithium fluoride, it is fluorinated lithium concentration
For 0.05g/ml；
It is further preferred that sintering titanium aluminum carbide is made by titanium, aluminium, titanium carbide 5:3:20 in mass ratio through high temperature sintering；
It is further preferred that carbon dioxide high-temperature oxidation process temperature is 850 DEG C, soaking time 60min, carbon dioxide stream
Measure 150ml/min.
Enumerate embodiment further below with the present invention will be described in detail.It will similarly be understood that following embodiment is served only for this
Invention is further described, and should not be understood as limiting the scope of the invention, those skilled in the art is according to this hair
Some nonessential modifications and adaptations that bright above content is made all belong to the scope of protection of the present invention.Following examples are specific
Technological parameter etc. is also only an example in OK range, i.e. those skilled in the art can be done properly by the explanation of this paper
In the range of select, and do not really want to be defined in hereafter exemplary specific value.
Embodiment 1
In the present embodiment, a kind of sound equipment of high tone quality, including cabinet and master control borad is provided with loudspeaker on the cabinet,
The master control borad is arranged in box house, the master control borad include microprocessor module, Audio Input Modules, D/A conversion module,
Power amplifier module and control electric appliance, control electric appliance as device and provide power supply, Audio Input Modules are connected with microprocessor module, microprocessor
Module is connected with D/A conversion module, and D/A conversion module is connected with power amplifier module；Each module on the master control borad be equipped with
The matched the cover of block size, the cover outer patch are equipped with electromagnetic shielding film, and the electromagnetic shielding film is coated with electromagnetic shielding
The pad pasting of coating, the preparation of the electromagnetic screen coating the following steps are included:
A. partial size is mixed less than the Ti powder, Al powder and TiC powder of 300 mesh according to the ratio of mass ratio 5:3:20, mixing
Powder is dispersed in dehydrated alcohol, after entering ball mill ball milling for 24 hours, is dried sample, graphite jig is pressed into, in argon atmosphere
Under, it is warming up to 1400 DEG C, keeps temperature calcination 2h, after naturally cool to obtaining Ti after room temperature3AlC2Agglomerate, crush, grind,
Sieving, obtains Ti of the partial size less than 500 mesh3AlC2Powder；
B. LiF 1g is added in cooling PTEF container, is slowly added to the HCl solution of 20ml 10mol/L, stirs
30min weighs Ti obtained by 1g step A3AlC2Powder, controls temperature at 50 DEG C hereinafter, be slowly added to above-mentioned solution several times,
35 DEG C of heat preservation 72h after addition, every 6h shake is primary, and after reaction, repeated centrifugation, washing to cleaning solution are in neutrality, and does
Dry precipitating,
C. the precipitating 2g of step B is added in 100ml deionized water, ultrasonication handles 2min, ultrasonic power 270W, surpasses
The sound time: then the anhydrous ZnCl of 0.86g is added in dwell time 1s:2s2, 0.36g bromine palm fibre trimethyl ammonium, stirring and dissolving, NH4OH
PH value of solution is adjusted to 10,30min is stirred, obtains suspension M, bromine palm fibre trimethyl ammonium 0.18g, hydration are added in 50ml deionized water
Hydrazine 5g obtains solution N, and solution N is slowly added into suspension M, stirs 2h, alternately dehydrated alcohol and distilled water carry out more
Secondary washing, 50 DEG C of drying；
D. sample obtained by 0.2g step C is weighed, under Ar protective atmosphere, 600 DEG C is warming up to, keeps the temperature 45min, temperature rises to
750 DEG C, 15min is kept the temperature, atmosphere is switched to CO2, gas flow 150ml/min, heat preservation 60min, atmosphere is switched to Ar, self cooling
To room temperature, oxidation product is obtained；
E. step D oxidation product and epoxy resin, ethyl acetate, silane coupling agent, organobentonite are with mass ratio
200:100:50:1:3 mixing, is made electromagnetic screen coating.
Embodiment 2
In the present embodiment, a kind of sound equipment of high tone quality, including cabinet and master control borad is provided with loudspeaker on the cabinet,
The master control borad is arranged in box house, the master control borad include microprocessor module, Audio Input Modules, D/A conversion module,
Power amplifier module and control electric appliance, control electric appliance as device and provide power supply, Audio Input Modules are connected with microprocessor module, microprocessor
Module is connected with D/A conversion module, and D/A conversion module is connected with power amplifier module；Each module on the master control borad be equipped with
The matched the cover of block size, the cover outer patch are equipped with electromagnetic shielding film, and the electromagnetic shielding film is coated with electromagnetic shielding
The pad pasting of coating, the preparation of the electromagnetic screen coating the following steps are included:
A. partial size is mixed less than the Ti powder, Al powder and TiC powder of 300 mesh according to the ratio of mass ratio 5:3:20, mixing
Powder is dispersed in dehydrated alcohol, after entering ball mill ball milling for 24 hours, is dried sample, graphite jig is pressed into, in argon atmosphere
Under, it is warming up to 1400 DEG C, keeps temperature calcination 2h, after naturally cool to obtaining Ti after room temperature3AlC2Agglomerate, crush, grind,
Sieving, obtains Ti of the partial size less than 500 mesh3AlC2Powder；
B. LiF 1g is added in cooling PTEF container, is slowly added to the HCl solution of 20ml 10mol/L, stirs
30min weighs Ti obtained by 1g step A3AlC2Powder, controls temperature at 50 DEG C hereinafter, be slowly added to above-mentioned solution several times,
35 DEG C of heat preservation 72h after addition, every 6h shake is primary, and after reaction, repeated centrifugation, washing to cleaning solution are in neutrality, and does
Dry precipitating,
C. the precipitating 2g of step B is added in 100ml deionized water, ultrasonication handles 2min, ultrasonic power 270W, surpasses
The sound time: then the anhydrous ZnCl of 0.86g is added in dwell time 1s:2s2, 0.36g bromine palm fibre trimethyl ammonium, stirring and dissolving, NH4OH
PH value of solution is adjusted to 10,30min is stirred, obtains suspension M, bromine palm fibre trimethyl ammonium 0.18g, hydration are added in 50ml deionized water
Hydrazine 5g obtains solution N, and solution N is slowly added into suspension M, stirs 2h, alternately dehydrated alcohol and distilled water carry out more
Secondary washing, 50 DEG C of drying；
D. sample obtained by 0.2g step C is weighed, under Ar protective atmosphere, 600 DEG C is warming up to, keeps the temperature 45min, temperature rises to
750 DEG C, 15min is kept the temperature, atmosphere is switched to CO2, gas flow 150ml/min, heat preservation 60min, atmosphere is switched to Ar, self cooling
To room temperature, oxidation product is obtained；
E. step D oxidation product and epoxy resin, ethyl acetate, silane coupling agent, organobentonite are with mass ratio
150:100:30:1:3 mixing, is made electromagnetic screen coating.
Comparative example 1
Step B products therefrom and epoxy resin, ethyl acetate, silane coupling agent, organobentonite are with mass ratio 200:
100:50:1:3 mixing, is made coating.
Experiment test:
Using the test method of the Materials ' Shielding Effectiveness in SJ50524-1995 standard 100 × 103—1.5×109kHz
Frequency range in the electromagnetic wave shielding of electromagnetic shielding film of the preparation of the electromagnetic screen coating described in embodiment can be carried out test,
It is surveyed using the conductivity of the electromagnetic shielding film of comprehensive physical property measuring system electromagnetic screen coating described in embodiment preparation
Examination, test result such as table 1.
1 embodiment test result of table
| Conductivity (S/cm) | Shielding properties (dB) | |
| Embodiment 1 | 18 | 48-55 |
| Embodiment 2 | 15 | 28-34 |
| Comparative example 1 | 2 | 10-15 |
The foregoing is merely preferred modes of the invention, are not intended to limit the invention, all in spirit and original of the invention
Within then, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of sound equipment of high tone quality, which is characterized in that including cabinet and master control borad, loudspeaker, institute are provided on the cabinet
It states master control borad to be arranged in box house, the master control borad includes microprocessor module, Audio Input Modules, D/A conversion module, function
Amplification module and control electric appliance, control electric appliance as device and provide power supply, Audio Input Modules are connected with microprocessor module, microprocessor mould
Block is connected with D/A conversion module, and D/A conversion module is connected with power amplifier module；Each module on the master control borad is equipped with and mould
The matched the cover of block size, the cover outer patch are equipped with electromagnetic shielding film, and the electromagnetic shielding film is to apply coated with electromagnetic shielding
The pad pasting of material；The electromagnetic screen coating is by filler: film-forming resin: diluent: coupling agent: dispersing agent example 150- in mass ratio
200:100:30-50:1:3 is mixed to prepare, and the filler is the modified MXene in surface；The film-forming resin is epoxy resin；It is described
Coupling agent is silane coupling agent；The dispersing agent is organobentonite, and the modified MXene in the surface includes MXene carrier and bears
Carrier layer, load layer include zinc oxide phase, carbon phase and titanium dioxide phase, the MXene carrier by sintering titanium aluminum carbide pass through containing lithium from
The hydrofluoric acid solution of son etches to obtain；The carbon phase and titanium dioxide are mutually obtained by MXene carrier through carbon dioxide high-temperature oxydation；
The zinc oxide is mutually obtained by MXene carrier through zinc ion load, hydrazine hydrate reduction, carbon dioxide high-temperature oxydation.
2. a kind of sound equipment of high tone quality according to claim 1, which is characterized in that the hydrofluoric acid solution containing lithium ion
For the concentrated hydrochloric acid solution dissolved with lithium fluoride, fluorination lithium concentration is 0.05g/ml.
3. a kind of sound equipment of high tone quality according to claim 1, which is characterized in that the sintering titanium aluminum carbide by titanium, aluminium,
Titanium carbide 5:3:20 in mass ratio is made through high temperature sintering.
4. a kind of sound equipment of high tone quality according to claim 1, which is characterized in that the mistake of the carbon dioxide high-temperature oxydation
Cheng Wendu is 850 DEG C, soaking time 60min, carbon dioxide flow 150ml/min.
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| CN107938026A (en) * | 2017-11-17 | 2018-04-20 | 浙江大学 | A kind of MXene fibers and preparation method thereof |
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| CN101974283A (en) * | 2010-11-30 | 2011-02-16 | 上海纳米技术及应用国家工程研究中心有限公司 | Epoxy resin coating with electromagnetic shielding performance and preparation method thereof |
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