CN107708037B - Control method and device of portable sound box - Google Patents
Control method and device of portable sound box Download PDFInfo
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- CN107708037B CN107708037B CN201711093172.8A CN201711093172A CN107708037B CN 107708037 B CN107708037 B CN 107708037B CN 201711093172 A CN201711093172 A CN 201711093172A CN 107708037 B CN107708037 B CN 107708037B
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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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
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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- Circuit For Audible Band Transducer (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
The invention discloses a control method and a control device of a portable sound box, wherein the method comprises the following steps: acquiring the residual electric quantity of a battery of the portable sound box; searching a gain value corresponding to the residual electric quantity in a preset gain list; and adjusting the power amplifier gain of the portable sound box according to the gain value. According to the control method and the control device of the portable sound box, the power amplifier gain is adjusted according to the residual electric quantity of the battery of the portable sound box, and the system voltage ripple is reduced, so that the working stability of the chip of the portable sound box is improved; and when the electric quantity is low, the loudspeaker can be prevented from sound breaking, the electric quantity wasted by sound breaking caused by insufficient power supply of the power amplifier is saved, and the working time of the system is prolonged.
Description
Technical Field
The invention relates to the field of compiling sound boxes, in particular to a control method and a control device of a portable sound box.
Background
The portable sound box adopts a battery to supply power to the power amplifier so as to realize the playing of sound signals. Under the condition that the battery power is low and the power amplifier output is large, the power supply is insufficient. In this case, the horn is likely to be distorted; meanwhile, the chip often cannot work stably because the system voltage ripple is too large and the voltage becomes low.
Disclosure of Invention
The invention mainly aims to provide a control method and a control device of a portable sound box, which can improve the working stability of a chip of the portable sound box.
In order to achieve the above object, the present invention provides a method for controlling a portable sound box, comprising:
acquiring the residual electric quantity of a battery of the portable sound box;
searching a gain value corresponding to the residual electric quantity in a preset gain list;
and adjusting the power amplifier gain of the portable sound box according to the gain value.
Further, the step of adjusting the power amplifier gain of the portable sound box according to the gain value includes:
and adjusting the power of the power amplifier input end of the portable sound box according to the gain value.
Further, the step of adjusting the power amplifier gain of the portable sound box according to the gain value includes:
and adjusting the power amplification factor of the portable sound box according to the gain value.
Further, before the step of searching for the gain value corresponding to the remaining power in the preset gain list, the method includes:
judging whether the residual electric quantity is reduced to a preset electric quantity or not;
and if so, generating an instruction for searching the gain value in the gain list.
Further, only one gain value is set in the gain list.
Further, the gain value is 2 dB.
Further, after the step of adjusting the power amplifier gain of the portable sound box according to the gain value, the method includes:
judging whether the portable sound box is inserted into an external power supply or not;
and if so, recovering the audio playing state of the portable sound box before the residual electric quantity.
Further, before the step of searching for the gain value corresponding to the remaining power in the preset gain list, the method includes:
acquiring system voltage of the portable sound box;
judging whether the system voltage changes to a preset value within preset time or not;
and if so, generating an instruction for searching the gain value in the gain list.
Further, before the step of searching for the gain value corresponding to the remaining power in the preset gain list, the method includes:
obtaining a system voltage ripple of the portable sound box;
judging whether the system voltage ripple is larger than a preset ripple threshold value or not;
and if so, generating an instruction for searching the gain value in the gain list.
The present invention also provides a control device for a portable sound box, comprising:
the first acquisition unit is used for acquiring the residual electric quantity of the battery of the portable sound box;
the searching unit is used for searching a gain value corresponding to the residual electric quantity in a preset gain list;
and the gain unit is used for adjusting the power amplifier gain of the portable sound box according to the gain value.
Further, the gain unit includes:
and the first gain module is used for adjusting the power of the power amplifier input end of the portable sound box according to the gain value.
Further, the gain unit includes:
and the second gain module is used for adjusting the power amplification factor of the portable sound box according to the gain value.
Further, the control device of the portable sound box further comprises:
the first judging unit is used for judging whether the residual electric quantity is reduced to a preset electric quantity or not;
and the first generating unit is used for generating an instruction for searching the gain value in the gain list if the residual electric quantity is judged to be reduced to the preset electric quantity.
Further, only one gain value is set in the gain list.
Further, the gain value is 2 dB.
Further, the control device of the portable sound box further comprises:
the second judgment unit is used for judging whether the portable sound box is inserted into an external power supply or not;
and the recovery unit is used for recovering the audio playing state of the portable sound box before the residual electric quantity if the portable sound box is judged to be plugged into an external power supply.
Further, the control device of the portable sound box further comprises:
the acquisition module is used for acquiring the system voltage of the portable sound box;
the judging module is used for judging whether the system voltage changes to reach a preset value within preset time;
and if so, generating an instruction for searching the gain value in the gain list.
Further, the control device of the portable sound box further comprises:
the second acquisition unit is used for acquiring system voltage ripples of the portable sound box;
the third judging unit is used for judging whether the system voltage ripple is larger than a preset ripple threshold value or not;
and the generating unit is used for generating an instruction for searching the gain value in the gain list if the system voltage ripple is judged to be larger than a preset ripple threshold value.
According to the control method and the control device of the portable sound box, the power amplifier gain is adjusted according to the residual electric quantity of the battery of the portable sound box, and the system voltage ripple is reduced, so that the working stability of a chip of the portable sound box is improved, and the playing tone quality is improved; and when the electric quantity is low, the loudspeaker can be prevented from sound breaking, the electric quantity wasted by sound breaking caused by insufficient power supply of the power amplifier is saved, and the working time of the system is prolonged.
Drawings
Fig. 1 is a schematic flow chart of a control method of a portable sound box according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a control method of a portable sound box according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a control method of a portable sound box according to an embodiment of the present invention;
fig. 4 is a schematic flow chart illustrating a control method of a portable sound box according to another embodiment of the present invention;
fig. 5 is a block diagram schematically illustrating a structure of a control device of a portable sound box according to an embodiment of the present invention;
FIG. 6 is a block diagram illustrating a gain unit according to an embodiment of the present invention;
fig. 7 is a block diagram schematically illustrating a structure of a control device of a portable sound box according to an embodiment of the present invention;
fig. 8 is a block diagram schematically illustrating a structure of a control device of a portable sound box according to an embodiment of the present invention;
fig. 9 is a block diagram schematically illustrating a structure of a control device of a portable sound box according to another embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, an embodiment of the present invention provides a method for controlling a portable sound box, including:
and S1, acquiring the residual electric quantity of the battery of the portable sound box.
In this step, the battery is generally a rechargeable battery, and the MCU of the portable speaker can always read the remaining power of the battery through the battery management system, for example, the remaining power of the battery is obtained through the commonly used ADC sampling.
And S2, searching a corresponding gain value of the residual capacity in a preset gain list.
In this step, the gain list is a list with the remaining power and the corresponding gain value, for example, when the remaining power is X, the corresponding gain value is Y.
And S3, adjusting the power amplifier gain of the portable sound box according to the gain value.
In this step, the power amplifier gain of the portable speaker is adjusted, generally to reduce the power amplifier gain, so as to reduce the magnitude of the system voltage ripple. If the maximum output power of the C3101 power amplifier is about 2W, when the voltage is 3.7V, the current is about 600mA, and the voltage ripple is about 150 mV; when the voltage is reduced to 3.5V or below, the constant power is unchanged, the current required by the power amplifier is increased to over 700mA, the voltage ripple is increased to 200mV, and the transient minimum voltage is close to the minimum working voltage of the system by 3.2V. When the battery voltage further drops, the current required for outputting 2W power exceeds the maximum current 1C of the battery, namely 800mA, meanwhile, the system enters a shutdown state because the instantaneous voltage is lower than 3.3V, and meanwhile, the horn generates noise because of insufficient power. The operation is carried out until the automatic shutdown is carried out, the test voltage is 3.5V after one minute, and about 10% -12% of electricity is remained. After the power amplifier gain is reduced, for example, the gain of the C3101 system is reduced by 2dB at 3.5V, the current is reduced to about 420mA, and the voltage ripple is less than 80 mV. The actual test system can delay 12 minutes to shut down, and the battery power is fully utilized. After the system is played to be automatically shut down, the test voltage is about 3.39V after one minute, and the actual residual electric quantity is about 2% -3%.
In this embodiment, the step S3 of adjusting the power amplifier gain of the portable sound box according to the gain value includes:
s31, adjusting the power of the power amplifier input end of the portable sound box according to the gain value, or,
and S32, adjusting the power amplification factor of the portable sound box according to the gain value.
The power amplifier gain of the portable sound box can be realized through the steps S11 or S12, and the methods for adjusting the power amplifier gain are very simple and easy to realize.
Referring to fig. 2, in this embodiment, before the step S2 of searching the preset gain list for the gain value corresponding to the remaining power, the method includes:
s201, judging whether the residual electric quantity is reduced to a preset electric quantity;
and S202, if so, generating an instruction for searching the gain value in the gain list.
In the above steps S201 and S202, the portable sound box does not search for a corresponding gain value for each remaining voltage in the gain list all the time to save resources, so a preset electric quantity is set, when the remaining electric quantity is the same as the preset electric quantity, it indicates that the portable sound box is about to achieve a situation of sound break and the like, so that the power amplifier gain needs to be adjusted, and at this time, an instruction for searching for the gain value in the gain list is generated, and subsequent steps such as searching for the list and adjusting the gain are performed.
In this embodiment, only one gain value is set in the gain list, and the gain value is 2 dB. Because the volume of portable audio amplifier, broadcast power etc. are less, when reducing 2dB gain, have actually reduced a lot, can play the emergence of the condition such as preventing to break a sound completely. In other embodiments, multiple sets of corresponding remaining power and gain values may be preset in the gain list, that is, multiple sets of gain adjustment gears are set, so that the power amplifier gain can be smoothly reduced, and the smooth change of the output of the portable sound box is ensured.
Referring to fig. 3, in this embodiment, after the step S3 of adjusting the power amplifier gain of the portable sound box according to the gain value, the method includes:
s4, judging whether the portable sound box is inserted into an external power supply or not;
and S5, if yes, restoring the audio playing state of the portable sound box before the residual electric quantity.
As described in steps S101 and S102, if the portable sound box is plugged into the external power source, the energy of the external power source is directly used, so the power is sufficient, and the situations such as sound breaking due to insufficient power are not caused, so the audio playing state of the portable sound box is restored to the normal audio playing state from the audio playing state in which the power amplification gain is reduced, that is, the audio playing state when the battery power is sufficient, and the playing effect of the portable sound box is improved.
In another embodiment, before the step of searching for the gain value corresponding to the remaining power in the preset gain list, the method includes:
acquiring system voltage of the portable sound box;
judging whether the system voltage changes to a preset value within preset time or not;
and if so, generating an instruction for searching the gain value in the gain list.
For example, when the system voltage is detected to be 3.5V, the voltage of the system drops below 3.3V within a short preset time (usually tens of milliseconds), and it is determined that the voltage ripple is too large, which easily causes audio distortion output by the speaker, so that an instruction for searching the gain value in the gain list is generated, and the gain can be adjusted in time.
Referring to fig. 4, in another embodiment, before the step S2 of searching the preset gain list for the gain value corresponding to the remaining power includes:
s203, obtaining a system voltage ripple of the portable sound box;
s204, judging whether the system voltage ripple is larger than a preset ripple threshold value;
and S205, if so, generating an instruction for searching the gain value in the gain list.
As described in the above steps S203, S204, and S205, the system voltage ripple of the portable sound box is an important factor that affects stable operation of the chip of the portable sound box, so that whether a break occurs in the portable sound box or not can be determined according to the magnitude of the system voltage ripple, and the system voltage ripple can be used as a condition for determining whether the power amplifier gain of the portable sound box needs to be adjusted, so as to effectively improve the accuracy of determining whether the power amplifier gain needs to be reduced.
According to the control method of the portable sound box, disclosed by the embodiment of the invention, the power amplifier gain is adjusted according to the residual electric quantity of the battery of the portable sound box, and the system voltage ripple is reduced, so that the working stability of the chip of the portable sound box is improved; and when the electric quantity is low, the loudspeaker can be prevented from sound breaking, the electric quantity wasted by sound breaking caused by insufficient power supply of the power amplifier is saved, and the working time of the system is prolonged.
Referring to fig. 5, the present invention further provides a control apparatus for a portable speaker, including:
the first obtaining unit 10 is configured to obtain a remaining power of a battery of the portable sound box.
The battery is generally a rechargeable battery, and the MCU of the portable speaker can read the remaining power of the battery through the battery management system, for example, the remaining power of the battery is obtained through the commonly used ADC sampling.
And a searching unit 20, configured to search a preset gain list for a gain value corresponding to the remaining power.
The gain list is a list with the remaining power and the corresponding gain value, for example, when the remaining power is X, the corresponding gain is Y.
And the gain unit 30 is used for adjusting the power amplifier gain of the portable sound box according to the gain value.
The power amplifier gain of the portable sound box is adjusted, generally, the power amplifier gain is reduced, so that the size of the voltage ripple of the system is reduced. If the maximum output power of the C3101 power amplifier is about 2W, when the voltage is 3.7V, the current is about 600mA, and the voltage ripple is about 150 mV; when the voltage is reduced to 3.5V or below, the constant power is unchanged, the current required by the power amplifier is increased to over 700mA, the voltage ripple is increased to 200mV, and the transient minimum voltage is close to the minimum working voltage of the system by 3.2V. When the battery voltage further drops, the current required for outputting 2W power exceeds the maximum current 1C of the battery, namely 800mA, meanwhile, the system enters a shutdown state because the instantaneous voltage is lower than 3.3V, and meanwhile, the horn generates noise because of insufficient power. The operation is carried out until the automatic shutdown is carried out, the test voltage is 3.5V after one minute, and about 10% -12% of electricity is remained. After the power amplifier gain is reduced, for example, the gain of the C3101 system is reduced by 2dB at 3.5V, the current is reduced to about 420mA, and the voltage ripple is less than 80 mV. The actual test system can delay 12 minutes to shut down, and the battery power is fully utilized. After the system is played to be automatically shut down, the test voltage is about 3.39V after one minute, and the actual residual electric quantity is about 2% -3%.
Referring to fig. 6, in this embodiment, the gain unit 30 includes: the first gain module 31 is configured to adjust the power of the power amplifier input end of the portable sound box according to the gain value; or, the second gain module 32 is configured to adjust a power amplification factor of the portable sound box according to the gain value.
The first gain module 11 and the second gain module 12 are two devices for adjusting the power amplifier gain, both of which can realize the power amplifier gain of the portable sound box, and both methods for adjusting the power amplifier gain are very simple and easy to realize.
Referring to fig. 7, in this embodiment, the control device of the portable sound box further includes:
a first determining unit 201, configured to determine whether the remaining power is reduced to a preset power;
a first generating unit 202, configured to generate an instruction to search the gain value in the gain list if it is determined that the remaining power amount is reduced to a preset power amount.
The portable sound box does not search a corresponding gain value for each residual voltage in the gain list all the time so as to save resources, so a preset electric quantity is set, when the judging module 201 judges that the residual electric quantity is the same as the preset electric quantity, it is indicated that the portable sound box is about to achieve the situation of sound breaking and the like, so the power amplifier gain needs to be adjusted, at this time, the generating module 202 generates an instruction for searching the gain value in the gain list, and performs subsequent processes of searching the list, adjusting the gain and the like.
In this embodiment, only one gain value is set in the gain list, and the gain value is 2 dB. Because the volume of portable audio amplifier, broadcast power etc. are less, when reducing 2dB gain, have actually reduced a lot, can play the emergence of the condition such as preventing to break a sound completely. In other embodiments, multiple sets of corresponding remaining power and gain values may be preset in the gain list, that is, multiple sets of gain adjustment gears are set, so that the power amplifier gain can be smoothly reduced, and the smooth change of the output of the portable sound box is ensured.
Referring to fig. 8, in this embodiment, the control device of the portable sound box further includes:
a second judging unit 40, configured to judge whether the portable sound box is plugged into an external power supply;
and the recovery unit 50 is configured to recover the audio playing state of the portable sound box before the remaining power if it is determined that the portable sound box is plugged into an external power supply.
If portable audio amplifier inserts external power supply, then can directly use external power supply's energy, so the electric quantity is sufficient, can not appear breaking the emergence of the condition such as sound because of the electric quantity is not enough, so with portable audio amplifier by the audio playback state recovery to normal audio playback state that reduces the power amplifier gain, audio playback state when battery electric quantity is sufficient promptly improves portable audio amplifier's broadcast effect.
In one embodiment, the control device of the portable speaker further includes:
the acquisition module is used for acquiring the system voltage of the portable sound box;
the judging module is used for judging whether the system voltage changes to reach a preset value within preset time;
and if so, generating an instruction for searching the gain value in the gain list.
Referring to fig. 9, in this embodiment, the control device of the portable sound box further includes:
a second obtaining unit 203, configured to obtain a system voltage ripple of the portable sound box;
a third determining unit 204, configured to determine whether the system voltage ripple is greater than a preset ripple threshold;
a second generating unit 205, configured to generate an instruction to search the gain value in the gain list if it is determined that the system voltage ripple is greater than a preset ripple threshold.
The system voltage ripple of the portable sound box is an important factor influencing the stable work of the chip of the portable sound box, so that whether the portable sound box is about to break sound or not can be judged according to the size of the system voltage ripple, the portable sound box can be used as a condition whether the power amplifier gain of the portable sound box needs to be adjusted or not, and the accuracy of judging whether the portable sound box really needs to reduce the power amplifier gain can be effectively improved.
According to the control device of the portable sound box, disclosed by the embodiment of the invention, the power amplifier gain is adjusted according to the residual electric quantity of the battery of the portable sound box, and the system voltage ripple is reduced, so that the working stability of the chip of the portable sound box is improved; and when the electric quantity is low, the loudspeaker can be prevented from sound breaking, the electric quantity wasted by sound breaking caused by insufficient power supply of the power amplifier is saved, and the working time of the system is prolonged.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A control method of a portable sound box is characterized by comprising the following steps:
acquiring the residual electric quantity of a battery of the portable sound box;
searching a gain value corresponding to the residual electric quantity in a preset gain list, so that the electric quantity of the battery can be fully utilized;
adjusting the power amplifier gain of the portable sound box according to the gain value;
after the step of adjusting the power amplifier gain of the portable sound box according to the gain value, the method comprises the following steps:
judging whether the portable sound box is inserted into an external power supply or not;
if so, restoring the audio playing state of the portable sound box when the battery electric quantity is sufficient;
before the step of searching the gain value corresponding to the remaining power in the preset gain list, the method includes:
obtaining a system voltage ripple of the portable sound box;
judging whether the system voltage ripple is larger than a preset ripple threshold value or not;
and if so, generating an instruction for searching the gain value in the gain list.
2. The method for controlling a portable speaker as claimed in claim 1, wherein the step of searching the gain value corresponding to the remaining power in the preset gain list comprises:
judging whether the residual electric quantity is reduced to a preset electric quantity or not;
and if so, generating an instruction for searching the gain value in the gain list.
3. The method of claim 1, wherein only one gain value is set in the gain list.
4. The method for controlling a portable speaker as claimed in claim 1, wherein the step of searching the gain value corresponding to the remaining power in the preset gain list comprises:
acquiring system voltage of the portable sound box;
judging whether the system voltage changes to a preset value within preset time or not;
and if so, generating an instruction for searching the gain value in the gain list.
5. A control device of a portable sound box is characterized by comprising:
the first acquisition unit is used for acquiring the residual electric quantity of the battery of the portable sound box;
the searching unit is used for searching a gain value corresponding to the residual electric quantity in a preset gain list;
the gain unit is used for adjusting the power amplifier gain of the portable sound box according to the gain value;
the second judgment unit is used for judging whether the portable sound box is inserted into an external power supply or not;
the recovery unit is used for recovering the audio playing state when the battery electric quantity of the portable sound box is sufficient if the portable sound box is judged to be inserted into the external unit;
the second acquisition unit is used for acquiring system voltage ripples of the portable sound box;
the third judging unit is used for judging whether the system voltage ripple is larger than a preset ripple threshold value or not;
and the second generating unit is used for generating an instruction for searching the gain value in the gain list if the system voltage ripple is judged to be larger than a preset ripple threshold value.
6. The control device of a portable speaker as claimed in claim 5, further comprising:
the first judging unit is used for judging whether the residual electric quantity is reduced to a preset electric quantity or not;
and the first generating unit is used for generating an instruction for searching the gain value in the gain list if the residual electric quantity is judged to be reduced to the preset electric quantity.
7. The control device of claim 5, wherein only one gain value is set in the gain list.
8. The control device of a portable speaker as claimed in claim 5, further comprising:
the acquisition module is used for acquiring the system voltage of the portable sound box;
the judging module is used for judging whether the system voltage changes to reach a preset value within preset time;
and the generating module is used for generating an instruction for searching the gain value in the gain list if the system voltage changes to a preset value within a preset time.
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| WO2019090534A1 (en) * | 2017-11-08 | 2019-05-16 | 深圳市沃特沃德股份有限公司 | Portable speaker control method and apparatus |
| CN110475182A (en) * | 2019-08-21 | 2019-11-19 | 四川长虹电器股份有限公司 | The audio system and sound accompaniment output adjusting method of sound accompaniment power supply dynamic change |
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