CN209390297U - A kind of intelligent audio amplification system and mobile terminal - Google Patents
A kind of intelligent audio amplification system and mobile terminal Download PDFInfo
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- CN209390297U CN209390297U CN201820743621.2U CN201820743621U CN209390297U CN 209390297 U CN209390297 U CN 209390297U CN 201820743621 U CN201820743621 U CN 201820743621U CN 209390297 U CN209390297 U CN 209390297U
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Abstract
The utility model discloses a kind of intelligent audio amplification system and mobile terminal is worked including audio-frequency amplifier with drive the speaker, comprising: the first storage unit stores loudspeaker overall model equation；Second storage unit, recording individual loudspeaker model equation；Signal processing part, the signal processing part are connect with first storage unit and second storage unit, obtain the individual information of each loudspeaker, by the individual information input individual loudspeaker model equation；And a correction model is generated according to the loudspeaker overall model equation and the individual loudspeaker model equation；Signal amplifying part connects the signal processing part and the loudspeaker, pushes the speaker operation according to the correction model.Beneficial effect is: the adaptive algorithm of application system identification adaptively filters, with drive the speaker steady operation, the damage for causing entire audio-frequency amplifier because of the difference of loudspeaker individual parameter is avoided, so that the stability of audio-frequency amplifier is more preferable.
Description
Technical field
The utility model relates to micro-electromechanical device technical field more particularly to a kind of intelligent audio amplification system and movements eventually
End.
Background technique
The purpose of audio-frequency amplifier is that the audio signal of input is rebuild on the output element for generating sound, signal volume and
Power stage can be realized effectively and ideally.Audio range is about 20Hz~20kHz, therefore amplifier is necessary within this range
There is good frequency response.
In the prior art, audio-frequency amplifier is to obtain loudspeaker by detection electric current, voltage using preceding to protection technique
Impedance, and estimate that temperature and the displacement of loudspeaker protect loudspeaker to control the amplitude of certain band frequency of loudspeaker, it is this
Advantage is to detect simply, does not need real-time monitoring, but the difference of individual loudspeaker can not be learnt, the individual difference of loudspeaker
It is very big, it is especially more prominent in Low ESR loudspeaker.
Summary of the invention
For the above-mentioned problems in the prior art, a kind of intelligent audio amplifier and mobile terminal are now provided.
Specific technical solution is as follows:
A kind of intelligent audio amplification system, wherein including an audio-frequency amplifier, worked with drive the speaker, comprising:
First storage unit stores a loudspeaker overall model equation；
Second storage unit, the individual loudspeaker model equation of record one；
Signal processing part, the signal processing part are connect with first storage unit and second storage unit, are obtained every
The individual information of one loudspeaker, by the individual information input individual loudspeaker model equation；And according to the loudspeaker
Overall model equation and the individual loudspeaker model equation generate a correction model；
Signal amplifying part connects the signal processing part and the loudspeaker, raises according to described in correction model promotion
The work of sound device.
Preferably, the individual information includes impedance information and/or displacement information.
Preferably, the loudspeaker that the loudspeaker is 3 ohm or 4 ohm.
Preferably, the loudspeaker is the loudspeaker that diameter is 16mm.
Preferably, the loudspeaker overall model equation are as follows:
vc·p[n]=Rebic·m[n]+φ(xd[n])ud[n]；
Wherein,
vc·p[n] indicates the predicted voltage signal of the loudspeaker；
ic·m[n] indicates the measurement current signal of the loudspeaker；
RebIndicate the detection resistance of the loudspeaker；
φ(xd[n]) indicate the loudspeaker displacement the coefficient of conductivity；
ud[n] indicates the speed parameter of the loudspeaker.
Preferably, the individual loudspeaker model equation are as follows:
Wherein,
ic·p[n] indicates the predicted current signal of the loudspeaker；
vc·m[n] indicates the measurement voltage signal of the loudspeaker；
RebIndicate the detection resistance of the loudspeaker；
φ(xd[n]) indicate the loudspeaker displacement the coefficient of conductivity；
ud[n] indicates the speed parameter of the loudspeaker.
Preferably, the impedance information of the individual loudspeaker model equation, displacement information obtain by the following method: being directed to
The loudspeaker issues a swept-frequency signal, passes through the relationship R of the impedance of detection and electric current, voltageeb=(vc·m[n],ic·p[n])
Real-time fitting obtains the impedance of each loudspeaker, displacement information.
A kind of mobile terminal, including intelligent audio amplification system described in any one.
The technical solution of the utility model beneficial effect is: the adaptive algorithm of application system identification is adaptively filtered
Wave avoids the damage for causing entire audio-frequency amplifier because of the difference of loudspeaker individual parameter with drive the speaker steady operation,
So that the stability of audio-frequency amplifier is more preferable.
Detailed description of the invention
With reference to appended attached drawing, more fully to describe the embodiments of the present invention.However, appended attached drawing is only used for
Bright and elaboration, does not constitute the limitation to the scope of the utility model.
Fig. 1 is the overall structure figure about intelligent audio amplifier in the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise for not making creative work
Under every other embodiment obtained, fall within the protection scope of the utility model.
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, but not as the utility model
It limits.
The utility model includes a kind of intelligent audio amplification system, wherein including an audio-frequency amplifier 1, to drive loudspeaking
Device 2 works, comprising:
First storage unit 10 stores a loudspeaker overall model equation；
Second storage unit 11, the individual loudspeaker model equation of record one；
Signal processing part 12, signal processing part 12 are connect with the first storage unit 10 and the second storage unit 11, obtain each raise
Individual information is inputted individual loudspeaker model equation by the individual information of sound device 2；And according to loudspeaker overall model equation and
Body loudspeaker model equation generates a correction model；
Signal amplifying part 13, connection signal processing unit 12 and loudspeaker 2 push speaker operation according to correction model.
By the technical solution of above-mentioned intelligent audio amplification system, as shown in Figure 1, intelligent audio amplification system includes audio
Amplifier 1 is used to drive the speaker 2 and works, and further includes the first storage unit 10, the second storage unit 11, signal processing part 12 and letter
Number enlarging section 13, wherein the first storage unit 10 is for storing loudspeaker overall model equation vc·p[n]=Rebic·m[n]+φ(xd
[n])ud[n]；Second storage unit 11 is used for recording individual loudspeaker model equation
Wherein vc·p[n] indicates the predicted voltage signal of loudspeaker, ic·m[n] indicates the measurement current signal of loudspeaker, ic·p[n] table
Show the predicted current signal of loudspeaker, vc·m[n] indicates the measurement voltage signal of loudspeaker, RebIndicate the detection electricity of loudspeaker
Resistance, φ (xd[n]) indicate loudspeaker displacement the coefficient of conductivity, udThe speed parameter of [n] expression loudspeaker；
Further, during the manufacturing, after complete machine assembles, signal processing part 12 is directed to loudspeaker 2
A swept-frequency signal is issued, the relationship R of the impedance of detection and electric current, voltage is passed througheb=(vc·m[n],ic·p[n]) real-time fitting obtains
The impedance of each loudspeaker 2, displacement information are inputted individual loudspeaker model side by impedance, the displacement information for obtaining each loudspeaker 2
Cheng Zhong, wherein RebIndicate the detection resistance of loudspeaker, vc·m[n] indicates the measurement voltage signal of loudspeaker, ic·p[n] expression is raised
The predicted current signal of sound device；
Further, the adaptive algorithm of 12 application system of signal processing part identification, wherein adaptive algorithm is used for iteration
The R that ground updatesebParameter, so that error signal is minimized with mean square meaning, while adaptive algorithm uses simple stochastic gradient,
By error signaloei[n] and the R to be updatedebThe error signal of parameteroeiThe product of the derivative of [n] determines that wherein individual is raised
In sound device model equation, the predicted current signal i of loudspeakerc·p[n], by with measurement current signal signal ic·m[n] into
Row compares, to obtain the error signal of loudspeaker 2oei[n]=ic·m[n]-ic·p[n]；
Further, correction model, amendment are generated according to loudspeaker overall model equation and individual loudspeaker model equation
It filters to model adaptation, signal amplifying part 13 is further avoided with pushing 2 steady operation of loudspeaker because of loudspeaker individual parameter
Difference and cause the damage of entire audio-frequency amplifier.
In a kind of preferably embodiment, individual information includes impedance information and/or displacement information.
Specifically, the adaptive algorithm of 5 application system of information treatment part identification, the individual information of each loudspeaker of acquisition
It is inputted in individual loudspeaker model equation including impedance information and/or displacement information, and by individual information.
It should be noted that the individual information in the utility model is not limited to impedance information and/or displacement information,
This is repeated no more.
In a kind of preferably embodiment, loudspeaker that loudspeaker 2 is 3 ohm or 4 ohm.
In a kind of preferably embodiment, loudspeaker 2 is the loudspeaker that diameter is 16mm.
Specifically, 2 selection standard diameter of loudspeaker is the Microspeaker of 16mm, while 3 ohm or 4 ohm of selection is low
Impedance speakers, according to Ohm's law, under identical voltage, impedance exceed it is high then flow through exceed few electric current, impedance exceed it is low then
It flows through and exceedes high electric current, select low-impedance loudspeaker 2, audio-frequency amplifier 1 needs bigger power to push, while loudspeaker
2 individual difference is bigger, therefore is directed to this low-impedance loudspeaker 2,1 inside setting signal processing unit of audio-frequency amplifier
12, the adaptive algorithm of application system identification is repaired according to loudspeaker overall model equation and individual loudspeaker model equation generation
Positive model, and correction model adaptively filters, and to drive steady operation, further avoids the difference because of loudspeaker individual parameter
Damage that is different and causing entire audio-frequency amplifier.
In a kind of preferably embodiment, loudspeaker overall model equation are as follows:
vc·p[n]=Rebic·m[n]+φ(xd[n])ud[n]；
Wherein,
vc·pThe predicted voltage signal of [n] expression loudspeaker；
ic·mThe measurement current signal of [n] expression loudspeaker；
RebIndicate the detection resistance of loudspeaker；
φ(xd[n]) indicate loudspeaker displacement the coefficient of conductivity；
udThe speed parameter of [n] expression loudspeaker.
In a kind of preferably embodiment, individual loudspeaker model equation are as follows:
Wherein,
ic·pThe predicted current signal of [n] expression loudspeaker；
vc·mThe measurement voltage signal of [n] expression loudspeaker；
RebIndicate the detection resistance of loudspeaker；
φ(xd[n]) indicate loudspeaker displacement the coefficient of conductivity；
udThe speed parameter of [n] expression loudspeaker.
Specifically, correction model is generated according to loudspeaker overall model equation and individual loudspeaker model equation, and repaired
Positive model adaptively filters, with 2 steady operation of drive the speaker；
Further, the signal processing part 12 inside audio-frequency amplifier 1 uses the adaptive algorithm of system identification, for fitting
Free parameter is answered, measurement current signal i is minimized with mean square meaningc·m[n] and predicted current signal ic·pDifference between [n],
Simultaneously according to the measurement current signal i of loudspeaker 2c·m[n], to calculate the predicted voltage signal v of loudspeaker 2c·p[n], this is root
It is done directly according to loudspeaker overall model equation；
Further, by the predicted voltage signal v of loudspeaker 2c·p[n] and measurement voltage signal vc·m[n] is compared,
Simultaneously according to above-mentioned loudspeaker overall model equation, adjusting parameter is to minimize error between the two, it should be noted that
Since audio-frequency amplifier 1 provides constant output voltage signal, loudspeaker can be known from the output signal of controller
Measurement voltage signal, do not need independent measurement.
In a kind of preferably embodiment, the impedance information of individual loudspeaker model equation, displacement information pass through with lower section
Method obtains: issuing a swept-frequency signal for loudspeaker 2, passes through the relationship R of the impedance of detection and electric current, voltageeb=(vc·m[n],
ic·p[n]) real-time fitting obtains the impedance of each loudspeaker 2, displacement information.
Specifically, during the manufacturing, after complete machine assembles, signal processing part 12 is sent out for loudspeaker 2
A swept-frequency signal out passes through the relationship R of the impedance of detection and electric current, voltageeb=(vc·m[n],ic·p[n]) real-time fitting acquisition
The impedance of each loudspeaker 2, displacement information are inputted individual loudspeaker model equation by the impedance of each loudspeaker 2, displacement information
In, to obtain the individual information of loudspeaker, wherein RebIndicate the detection resistance of loudspeaker, vc·mThe measurement of [n] expression loudspeaker
Voltage signal, ic·pThe predicted current signal of [n] expression loudspeaker.
A kind of mobile terminal, including the intelligent audio amplification system of any one.
It specifically, include intelligent audio amplification system in mobile terminal, for the individual difference between low-impedance loudspeaker 2
Adaptive algorithm that is different, being identified with application system, adaptive filtering, and then avoid due to the difference of loudspeaker individual parameter
Cause the damage of entire audio-frequency amplifier, so that entire mobile terminal stability is more preferable.
The technical solution of the utility model beneficial effect is: the adaptive algorithm of application system identification is adaptively filtered
Wave avoids the damage for causing entire audio-frequency amplifier because of the difference of loudspeaker individual parameter with drive the speaker steady operation,
So that the stability of audio-frequency amplifier is more preferable.
The foregoing is merely the utility model preferred embodiment, be not intended to limit the embodiments of the present invention and
Protection scope should can appreciate that all in the utility model specification and diagram to those skilled in the art
Hold made equivalent replacement and obviously change obtained scheme, the protection model of the utility model should all be included in
In enclosing.
Claims (7)
1. a kind of intelligent audio amplification system, which is characterized in that including an audio-frequency amplifier, worked with drive the speaker, comprising:
First storage unit stores a loudspeaker overall model equation；
Second storage unit, the individual loudspeaker model equation of record one；
Signal processing part, the signal processing part are connect with first storage unit and second storage unit, obtain each raise
The individual information of sound device, by the individual information input individual loudspeaker model equation；And it is overall according to the loudspeaker
Model equation and the individual loudspeaker model equation generate a correction model；
Signal amplifying part connects the signal processing part and the loudspeaker, pushes the loudspeaker according to the correction model
Work.
2. intelligent audio amplification system according to claim 1, which is characterized in that the individual information includes impedance information
And/or displacement information.
3. intelligent audio amplification system according to claim 1, which is characterized in that the loudspeaker is 3 ohm or 4 ohm
Loudspeaker.
4. intelligent audio amplification system according to claim 1, which is characterized in that the loudspeaker is that diameter is 16mm's
Loudspeaker.
5. intelligent audio amplification system according to claim 1, which is characterized in that the loudspeaker overall model equation
Are as follows:
vc·p[n]=Rebic·m[n]+φ(xd[n])ud[n]；
Wherein,
vc·p[n] indicates the predicted voltage of the loudspeaker；
ic·m[n] indicates the measurement electric current of the loudspeaker；
RebIndicate the detection resistance of the loudspeaker；
φ(xd[n]) indicate the loudspeaker displacement the coefficient of conductivity；
ud[n] indicates the speed parameter of the loudspeaker.
6. intelligent audio amplification system according to claim 2, which is characterized in that the individual loudspeaker model equation
Are as follows:
Wherein,
ic·p[n] indicates the predicted current of the loudspeaker；
vc·m[n] indicates the measurement voltage of the loudspeaker；
RebIndicate the detection resistance of the loudspeaker；
φ(xd[n]) indicate the loudspeaker displacement the coefficient of conductivity；
ud[n] indicates the speed parameter of the loudspeaker.
7. a kind of mobile terminal, which is characterized in that including intelligent audio amplification system described in claim 1 to 6 any one.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108513221A (en) * | 2018-05-18 | 2018-09-07 | 钰太芯微电子科技（上海）有限公司 | A kind of intelligent audio amplification system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108513221A (en) * | 2018-05-18 | 2018-09-07 | 钰太芯微电子科技（上海）有限公司 | A kind of intelligent audio amplification system |
| CN108513221B (en) * | 2018-05-18 | 2024-01-16 | 钰太芯微电子科技（上海）有限公司 | Intelligent audio amplification system |
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