CN108307265A - A kind of car audio system for supporting bluetooth - Google Patents
A kind of car audio system for supporting bluetooth Download PDFInfo
- Publication number
- CN108307265A CN108307265A CN201810112664.5A CN201810112664A CN108307265A CN 108307265 A CN108307265 A CN 108307265A CN 201810112664 A CN201810112664 A CN 201810112664A CN 108307265 A CN108307265 A CN 108307265A
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- China
- Prior art keywords
- module
- car audio
- audio system
- sound
- bluetooth
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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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The present invention provides a kind of car audio system for supporting bluetooth, and the car audio system includes power supply module, single chip control module, signal receiving module, sound processing module, sound enhancing module, playing module, operation module, display module, communication module and add-on module；The car audio system further includes the accumulator being connect with automobile current generator, and the power supply module is connect with the accumulator of the car audio system, and carries out rectifying and wave-filtering to accumulator output voltage, and will treated voltage output to single chip control module；It further include bluetooth module, the bluetooth module is communicated to connect with the signal receiving module, and the bluetooth module uses AU6210 as main control chip, has 8051 enhanced kernels, and the file of MP3, FAT16 and FAT32 format is read using two groups of MMC/SD sockets, and support power-failure memory.The present invention supports bluetooth equipment to access at any time, and sound broadcasting is carried out using the data in bluetooth equipment as broadcast source, promotes user experience.
Description
Technical field
The present invention relates to field of audio more particularly to a kind of car audio systems for supporting bluetooth.
Background technology
Automobile audio（auto audio）To mitigate the folding and unfolding sound dress that the uninteresting sense in driver and occupant's travelling is arranged
It sets.Automobile AM receiver is used earliest, is AMFM radio, magnetic tape sound reproducer later, is developed to CD cassette players
With compatible DCC, DAT digital acoustics.Present automobile audio no matter in various aspects such as tone color, operation and vibrationproof compared with having in the past
Larger raising, but there is also some problems：
For example, function is more single, the need of audio are played whenever and wherever possible in order to be compatible with existing a variety of audio data sources and user
It asks, it is necessary to which the compatibility of sound equipment is improved；
For another example, sound quality is unstable, the noise that power-supply fluctuation is brought, and the noise that sound wave is brought is harmful to inside speaker can all influence sound
The sound quality of acoustic system, to reduce user experience；
Further, since the specification of bluetooth is consistent in the world, therefore, as long as possessing the equipment of Bluetooth adapter, so that it may
To connect bluetooth, file and information are transmitted.Capital equipment includes laptop, bluetooth headset, mobile phone and Medical Devices
Deng.Therefore, increasingly extensive in Bluetooth technology, and there are the efficient advantage of convenient and fast communication under the premise of, in car audio system
Middle introducing Bluetooth technology is without suspected of wise move.
Invention content
In order to solve the above technical problem, the present invention provides a kind of car audio systems for supporting bluetooth.
The present invention is realized with following technical solution：
A kind of car audio system for supporting bluetooth, the car audio system include power supply module, single chip control module, letter
Number receiving module, sound processing module, sound enhancing module, playing module, operation module, display module, communication module and attached
Add module；
The car audio system further includes the accumulator being connect with automobile current generator, the power supply module and the automobile audio
The accumulator of system connects, and carries out rectifying and wave-filtering to accumulator output voltage, and will treated voltage output to microcontroller
Control module；
The car audio system further includes bluetooth module, and the bluetooth module is communicated to connect with the signal receiving module, institute
Stating bluetooth module uses AU6210 as main control chip, has 8051 enhanced kernels, and use two groups of MMC/SD
Socket reads the file of MP3, FAT16 and FAT32 format, and supports power-failure memory.
Further, the signal receiving module includes radio unit, and the radio unit is used comprising tuning system
Low Medium Frequency tuner and programmable frequency divider are core element, and the Low Medium Frequency tuner can generate main shock signal, and pass through
Automotive interior I2C buses are tuned the frequency division coefficient of programmable frequency divider, the local frequency hair for making voltage controlled oscillator export
Changing, to achieve the purpose that platform is adjusted in digitlization.
Further, the signal receiving module further includes MP3 processing units, and the MP3 processing units are for handling MP3
The audio data of data format；The MP3 processing units include digital cache processor and MP3 decoding device, the number caching
Processor and the communication connection of MP3 decoding device, and the digital cache processor is communicated to connect with the single chip control module；
The number cache processor is for storing decoding and storing CD, VCD, DVD, USB as the MP3 numbers under the scene of data source
According in order to read data from digital cache processor and be sent into MP3 decoding device, to which finally the number that decoding obtains be believed
It number is played out by being converted into analog signal.
Further, the sound enhancing module is made of sequentially connected front end circuit and power amplifier, described preposition
In-phase amplifier may be used in circuit, and the in-phase input end of the in-phase amplifier can also be in series with and play the role of blocking
Enhancing capacitance to deepen the DC feedback of the in-phase amplifier.
Further, the power amplifier realizes two-channel function using the identical single-frequency audio-frequency power amplifier of two panels,
The circuit structure of two sound channels is all identical.
Further, the playing module is made of several loudspeaker units, in each loudspeaker unit, frame and babinet
Increase elastic rubber washer between plate.
The beneficial effects of the invention are as follows：
A kind of car audio system for supporting bluetooth provided by the invention, has the advantages that：
（1）Power supply module, sound enhancing module, sound processing module and playing module are carried out customizing design, from more
Angle reduces issuable noise in audio playing process, promotes sound quality；
（2）Compatible a variety of audio data sources, promote the compatibility of sound system；
（3）It supports bluetooth equipment to access at any time, and carries out sound broadcasting using the data in bluetooth equipment as broadcast source, promoted and used
It experiences at family.
Description of the drawings
Fig. 1 is a kind of car audio system schematic diagram for supporting bluetooth provided in an embodiment of the present invention；
Fig. 2 is power supply module annexation figure provided in an embodiment of the present invention；
Fig. 3 is acoustical panel schematic diagram provided in an embodiment of the present invention；
Fig. 4 is noise reduction plate structure schematic diagram provided in an embodiment of the present invention；
Wherein：1- bases, 2- noise reduction layers, 21- the first noise reduction sublayers, 22- the second noise reduction sublayers, 23- air layers, 221- matrixes,
222- cores.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.
The embodiment of the present invention provides a kind of car audio system for supporting bluetooth, as shown in Figure 1, the car audio system
Including power supply module, single chip control module, signal receiving module, sound processing module, sound enhancing module, playing module,
Operation module, display module, communication module and add-on module；
The car audio system further includes the accumulator being connect with automobile current generator, the power supply module and the automobile audio
The accumulator of system connects, and carries out rectifying and wave-filtering to accumulator output voltage, and will treated voltage output to microcontroller
Control module.
The single chip control module and the power supply module, communication module, signal receiving module, sound processing module,
Sound enhancing module, operation module, playing module are connected with add-on module, and are connect to the power supply module, communication module, signal
It receives module, sound processing module, sound enhancing module, operation module, playing module and add-on module and carries out integrated control.
The signal receiving module, sound processing module, sound enhancing module and playing module are sequentially connected；
The sound enhancing module is also communicated to connect with the add-on module.
As shown in Fig. 2, the power supply module is additionally provided with voltage stabilizing element, institute on the connecting path of the accumulator
It can be that amorphous choke coil is passive low with the CL of big capacity electrolyte capacitor and low capacity monolithic ceramic capacitance composition to state voltage stabilizing element
Bandpass filter is used to that the glitch signal that automobile storage battery exports significantly to be decayed or filtered out completely, and can prevent vapour
The interference noise generated in automobile-used electric equipment internal circuit design is entered by power cord anti-channeling in car audio system, other are polluted
Electrical equipment power supply power supply environment.
Further, on power supply module and the connecting path of single chip control module, rectifier cell and filter are additionally provided with
Wave element can also be arranged as required to step-down transformer before the rectifier cell.
The core of the rectifier cell is that four diodes are connected obtained full-wave rectifying circuit from beginning to end, the full-wave rectification
Circuit is by four output ends, according to up time needle sort, respectively the first output end, second output terminal, third output end and the 4th
Output end, first output end and the third output end are in parallel with a predetermined capacitive, and in parallel with load, and described second is defeated
Outlet and the 4th output end are connected with the step-down transformer.The predetermined capacitive can play primary filter action,
Can be 2000 ~ 4500 μ F, pressure resistance is 16 ~ 50V, to filter out the AC compounent of the 50-100Hz exported by rectification.
In order to further smooth the direct current after rectification, the filter element, the filter are provided in the embodiment of the present invention
Wave element is formed by the electrolytic capacitor of two large capacities and the electrolytic capacitor framework of several hundreds of microfarads.
The signal receiving module can receive a variety of defeated from TYPE, CD, VCD, DVD, USB, TUNDER and AUX
Enter, wherein if the voice signal received comes from TUNER, the transmission of sound signals to electronic tuning unit is subjected to early period
Processing, and pre-processing result is transmitted into sound processing module；If the voice signal received comes from TYPE, CD, VCD, DVD, USB
And AUX, then the voice signal is directly transferred to sound processing module.
Specifically, in order to promote the ability for receiving TUNDER signals, in the embodiment of the present invention by be arranged radio unit come
It is individually used for receiving TUNDER signals, the radio unit adds diversity element on existing structure, and the diversity element passes through
It is worked using two individual tuners, the individual tuner synchronous working receives same channel, in addition, also setting up
It is connect union element with diversity element, to realize the means for closing diversity using high specific, independent signal is merged to realize
The purpose of signal enhancing.Certainly, this is also for avoiding the occurrence of considering for frequency selective fading.
The radio unit uses the Low Medium Frequency tuner comprising tuning system and programmable frequency divider is core element, institute
Main shock signal can be generated by stating Low Medium Frequency tuner, and by automotive interior I2C buses to the frequency division coefficient of programmable frequency divider
It is tuned, the local frequency that voltage controlled oscillator exports is made to change, to achieve the purpose that platform is adjusted in digitlization.
Specifically, for promotion signal receiving module for CD, VCD, DVD, USB as the MP3 under the scene of data source
The reception ability of data is individually used for the sound of processing MP3 data formats in the embodiment of the present invention by the way that MP3 processing units are arranged
Frequency evidence.The MP3 processing units include digital cache processor and MP3 decoding device, and the number cache processor and MP3 are solved
Code device communication connection, and the digital cache processor is communicated to connect with the single chip control module.The number caching
Processor is for store decoding and storing CD, VCD, DVD, USB as the MP3 data under the scene of data source, in order to from number
Data are read in word cache processor and are sent into MP3 decoding device, and the digital signal to finally obtain decoding is by being converted into
Analog signal plays out.
The sound enhancing module is made of sequentially connected front end circuit and power amplifier, and the front end circuit can be adopted
The enhancing capacitance for playing the role of blocking can also be in series with the in-phase input end of in-phase amplifier, and the in-phase amplifier
To deepen the DC feedback of the in-phase amplifier.
The in-phase amplifier of the front end circuit is described with mutually amplification by being grounded after the capacitance C and resistance R2 that connects
Series resistance R1 between the output end and in-phase input end of device.The capacitance C should be more thanWherein, f' is inputted
Signal frequency derivative statistical value.The effect of the front end circuit be to input power amplifier various sound source signals into
Row working process, or amplification, or decaying, make the input sensitivity of itself and power amplifier match, and carry out at frequency equilibrium
Reason so that the holding property of frequency of signal reverts to flat state.
The power amplifier realizes two-channel function using the identical single-frequency audio-frequency power amplifier of two panels, two sound channels
Circuit structure is all identical.
The playing module is made of several loudspeaker units, in each loudspeaker unit, is increased between frame and box plate
Add elastic rubber washer to reach damping purpose, especially woofer unit or medium and low spectrum loudspeaker unit by adding bullet
Property rubber ring can reach preferable damping effect.
Further, in order to promoted playing module broadcasting sound quality, can also be raised using some noise elimination structures to absorb
Harmful sound wave among sound device unit, especially low-frequency sound wave.The embodiment of the present invention provides a kind of disappearing for installation inside loudspeakers
Acoustic form, the noise elimination structure are horizontally placed on the tube wall that the loud speaker sound wave is sent out, specially a kind of acoustical panel, such as Fig. 3 institutes
Show, several through-holes are run through on the acoustical panel.
The acoustical panel Liang Ge bases and the noise reduction layer 2 being clipped among Liang Ge bases 1 as shown in figure 4, be made of, the base
Layer is made of cellular glass fibre.
The noise reduction layer 2 is made of the first noise reduction sublayer 21 and the second noise reduction sublayer 22,21 He of the first noise reduction sublayer
There is interval between second noise reduction sublayer 22, to form air layer 23；The first noise reduction sublayer 21 is fine by low-density polyester
It ties up acoustical cotton to constitute, the second noise reduction sublayer 22 is made using super glass wool as matrix 221 in 221 the inside embedment mass block of matrix
It is core 222 to form simple locally resonant type spring-damp system, absorbs low-frequency sound wave thereby using resonance principle.
Further, since the specification of bluetooth is consistent in the world, as long as possessing setting for Bluetooth adapter
It is standby, so that it may to connect bluetooth, to transmit file and information.Capital equipment includes laptop, bluetooth headset, mobile phone and doctor
Treat equipment etc..Therefore, increasingly extensive in Bluetooth technology, and there are the efficient advantage of convenient and fast communication under the premise of, the present invention is real
It applies example and is also further introduced into bluetooth module, to the function of one promotion sound system of machine.
The bluetooth module is communicated to connect with the signal receiving module.
Specifically, the bluetooth module uses AU6210 as main control chip, with 8051 enhanced kernels,
Two groups of MMC/SD sockets can be used to read the file of MP3, FAT16 and FAT32 format, in addition, the chip can also prop up
Power-failure memory is held, the function of sound system can be significantly increased.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that the implementation of the present invention
Example can be put into practice without these specific details.In some instances, well known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this description.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of each inventive aspect,
Above in the description of exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the method for the disclosure should be construed to reflect following intention：It is i.e. required to protect
Shield the present invention claims the more features of feature than being expressly recited in each claim.More precisely, such as this hair
As bright claims reflect, inventive aspect is all features less than single embodiment disclosed above.Cause
This, it then follows thus claims of specific implementation mode are expressly incorporated in the specific implementation mode, wherein each claim
Itself is all as a separate embodiment of the present invention.
Those skilled in the art, which are appreciated that, to carry out adaptively the module in the equipment in embodiment
Change and they are arranged in the one or more equipment different from the embodiment.It can be the module or list in embodiment
Member or component be combined into a module or unit or component, and can be divided into addition multiple submodule or subelement or
Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it may be used any
Combination is disclosed to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so to appoint
Where all processes or unit of method or equipment are combined.Unless expressly stated otherwise, this specification (including adjoint power
Profit requires, abstract and attached drawing) disclosed in each feature can be by providing the alternative features of identical, equivalent or similar purpose come generation
It replaces.
In addition, it will be appreciated by those of skill in the art that although embodiment described herein includes institute in other embodiments
Including certain features rather than other feature, but the combination of the feature of different embodiment means to be in the scope of the present invention
Within and form different embodiments.For example, in claims of the present invention, embodiment claimed it is arbitrary
One of mode can use in any combination.
The present invention be also implemented as some or all equipment for executing method as described herein or
System program (such as computer program and computer program product).It is such to realize that the program of the present invention be stored in computer
On readable medium, or can be with the form of one or more signal.Such signal can be above and below internet website
Load obtains, and can also be provided on carrier signal, or provide in any other forms.
It should be noted that above-described embodiment is that the present invention will be described rather than limits the invention, and
Those skilled in the art can design alternative embodiment without departing from the scope of the appended claims.In claim
In, any reference mark between bracket should not be configured to limitations on claims.Word "comprising" is not excluded for depositing
In elements or steps etc. not listed in the claims.Word "a" or "an" before element does not exclude the presence of more
A such element.The present invention can be by means of including the hardware of several different elements and by means of properly programmed calculating
Machine is realized.If in the unit claim for listing dry systems, several in these systems can be by same
Hardware branch embodies.The use of word first, second and third etc. does not indicate that any sequence, can explain these words
For title.
Claims (6)
1. a kind of car audio system for supporting bluetooth, it is characterised in that：
The car audio system includes power supply module, single chip control module, signal receiving module, sound processing module, sound
Sound enhances module, playing module, operation module, display module, communication module and add-on module；
The car audio system further includes the accumulator being connect with automobile current generator, the power supply module and the automobile audio
The accumulator of system connects, and carries out rectifying and wave-filtering to accumulator output voltage, and will treated voltage output to microcontroller
Control module；
The car audio system further includes bluetooth module, and the bluetooth module is communicated to connect with the signal receiving module, institute
Stating bluetooth module uses AU6210 as main control chip, has 8051 enhanced kernels, and use two groups of MMC/SD
Socket reads the file of MP3, FAT16 and FAT32 format, and supports power-failure memory.
2. a kind of car audio system for supporting bluetooth according to claim 1, it is characterised in that：
The signal receiving module includes radio unit, the radio unit use comprising tuning system Low Medium Frequency tuner and
Programmable frequency divider is core element, and the Low Medium Frequency tuner can generate main shock signal, and pass through automotive interior I2C buses
The frequency division coefficient of programmable frequency divider is tuned, so that the local frequency that voltage controlled oscillator exports is changed, to reach
The purpose of platform is adjusted in digitlization.
3. a kind of car audio system for supporting bluetooth according to claim 2, it is characterised in that：
The signal receiving module further includes MP3 processing units, and the MP3 processing units are used to handle the sound of MP3 data formats
Frequency evidence；The MP3 processing units include digital cache processor and MP3 decoding device, and the number cache processor and MP3 are solved
Code device communication connection, and the digital cache processor is communicated to connect with the single chip control module；The number caching
Processor is for store decoding and storing CD, VCD, DVD, USB as the MP3 data under the scene of data source, in order to from number
Data are read in word cache processor and are sent into MP3 decoding device, and the digital signal to finally obtain decoding is by being converted into
Analog signal plays out.
4. a kind of car audio system for supporting bluetooth according to claim 1, it is characterised in that：
The sound enhancing module is made of sequentially connected front end circuit and power amplifier, and the front end circuit may be used together
Phase amplifier, and the in-phase input end of the in-phase amplifier can also be in series with the enhancing capacitance for playing the role of blocking to add
The DC feedback of the deep in-phase amplifier.
5. a kind of car audio system for supporting bluetooth according to claim 4, it is characterised in that：
The power amplifier realizes two-channel function, the circuit of two sound channels using the identical single-frequency audio-frequency power amplifier of two panels
Construction is all identical.
6. a kind of car audio system for supporting bluetooth according to claim 1, it is characterised in that：
The playing module is made of several loudspeaker units, in each loudspeaker unit, increases bullet between frame and box plate
Property rubber washer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810112664.5A CN108307265A (en) | 2018-02-05 | 2018-02-05 | A kind of car audio system for supporting bluetooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810112664.5A CN108307265A (en) | 2018-02-05 | 2018-02-05 | A kind of car audio system for supporting bluetooth |
Publications (1)
| Publication Number | Publication Date |
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| CN108307265A true CN108307265A (en) | 2018-07-20 |
Family
ID=62864220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810112664.5A Pending CN108307265A (en) | 2018-02-05 | 2018-02-05 | A kind of car audio system for supporting bluetooth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110830058A (en) * | 2019-09-27 | 2020-02-21 | 福建工程学院 | Frequency modulation transmitter device based on Bluetooth communication |
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Application publication date: 20180720 |