WO2019090534A1

WO2019090534A1 - Portable speaker control method and apparatus

Info

Publication number: WO2019090534A1
Application number: PCT/CN2017/110006
Authority: WO
Inventors: 王刚明; 杜来柱
Original assignee: 深圳市沃特沃德股份有限公司
Priority date: 2017-11-08
Filing date: 2017-11-08
Publication date: 2019-05-16

Abstract

A portable speaker control method and an apparatus, the method comprising: acquiring remaining power of a portable speaker battery; searching in a pre-determined gain table for a gain value corresponding to the remaining power; adjusting amplifier gain of the portable speaker according to the gain value. The present portable speaker control method and apparatus can adjust amplifier gain according to power remaining in a battery of a portable speaker, decreasing system voltage ripple, and thereby increasing operating stability of a portable speaker chip; the present invention can also prevent sound of a loudspeaker from breaking up when power is low, saving power wasted when sound breaks up when amplification power supply is insufficient, extending operating time of a system.

Description

Portable speaker control method and device

[0001] The present invention relates to the field of writing a speaker, and more particularly to a control method and apparatus for a portable speaker.

[0002] A portable speaker is powered by a battery to a power amplifier to enable playback of a sound signal. In the case where the battery is low and the amplifier output is large, power supply may be insufficient. In this case, the horn is prone to distortion; the same because the system voltage ripple is too large and the voltage is low, the chip often does not work stably.

technical problem

[0003] A primary object of the present invention is to provide a control method and apparatus for a portable speaker that improves the stability of a chip of a portable speaker.

Problem solution

Technical solution

[0004] In order to achieve the above object, the present invention provides a control method for a portable speaker, including:

Obtaining a remaining battery power of the battery of the portable speaker;

[0006] searching for a gain value corresponding to the remaining power in a preset gain list;

Adjusting a power amplifier gain of the portable speaker according to the gain value.

[0008] Further, the step of adjusting the power amplifier gain of the portable speaker according to the gain value includes: [0009] adjusting power of the power amplifier input end of the portable speaker according to the gain value.

[0010] Further, the step of adjusting the power amplifier gain of the portable speaker according to the gain value includes: [0011] adjusting a power amplifier magnification of the portable speaker according to the gain value.

[0012] Further, before the step of searching for a gain value corresponding to the remaining power in the preset gain list, the method includes:

[0013] determining whether the remaining power is reduced to a preset power;

[0014] If yes, generating an instruction to find the gain value in the gain list.

[0015] Further, only one gain value is set in the gain list. [0016] Further, the gain value is 2 dB.

[0017] Further, after the step of adjusting the power amplifier gain of the portable speaker according to the gain value, the method includes:

[0018] determining whether the portable speaker is plugged into an external power source;

[0019] If yes, the audio playing state of the portable speaker before the remaining power is restored.

[0020] Further, before the step of searching for a gain value corresponding to the remaining power in the preset gain list, the method includes:

[0021] acquiring a system voltage of the portable speaker;

[0022] determining whether the system voltage changes within a preset time to reach a preset value;

[0023] If yes, generating an instruction to find the gain value in the gain list.

[0024] Further, before the step of searching for a gain value corresponding to the remaining power in the preset gain list, the method includes:

[0025] obtaining a system voltage ripple of the portable speaker;

Determining whether the system voltage ripple is greater than a preset ripple threshold;

[0027] If yes, generating an instruction to find the gain value in the gain list.

[0028]

[0029] The present invention also provides a control device for a portable speaker, comprising:

[0030] a first acquiring unit, configured to acquire a remaining battery power of the battery of the portable speaker;

[0031] a searching unit, configured to search, in a preset gain list, a gain value corresponding to the remaining power amount;

[0032] a gain unit, configured to adjust a power amplifier gain of the portable speaker according to the gain value.

[0033] Further, the gain unit includes:

[0034] a first gain module, configured to adjust power of the power amplifier input end of the portable speaker according to the gain value

[0035] Further, the gain unit includes:

[0036] a second gain module, configured to adjust a power amplifier magnification of the portable speaker according to the gain value.

[0037] Further, the control device of the portable speaker further includes:

[0038] a first determining unit, configured to determine whether the remaining power is reduced to a preset power;

[0039] a first generating unit, configured to generate, at the gain, if the remaining power is determined to be reduced to a preset power An instruction to find the gain value in the list.

[0040] Further, only one gain value is set in the gain list.

[0041] Further, the gain value is 2 dB.

[0042] Further, the control device of the portable speaker further includes:

[0043] a second determining unit, configured to determine whether the portable speaker is plugged into an external power source;

And a recovery unit, configured to restore an audio playing state of the portable speaker before the remaining power if the portable speaker is determined to be plugged into an external power source.

[0045] Further, the control device of the portable speaker further includes:

[0046] an acquiring module, configured to acquire a system voltage of the portable speaker;

[0047] a determining module, configured to determine whether the system voltage changes within a preset time to reach a preset value;

And [0048] generating a module, if yes, generating an instruction to search for the gain value in the gain list.

[0049] Further, the control device of the portable speaker further includes:

[0050] a second acquiring unit, configured to acquire a system voltage ripple of the portable speaker;

[0051] a third determining unit, configured to determine whether the system voltage ripple is greater than a preset ripple threshold;

And a generating unit, configured to generate an instruction to search for the gain value in the gain list if it is determined that the system voltage ripple is greater than a preset ripple threshold.

Advantageous effects of the invention

Beneficial effect

[0053] The control method and device for the portable speaker of the present invention adjusts the power amplifier gain according to the remaining power of the battery of the portable speaker, reduces the system voltage ripple, thereby improving the working stability of the portable speaker chip, thereby improving the sound quality of the playback; It can prevent the battery from being broken when the power is low, which saves the power wasted by the broken sound of the power supply of the power amplifier, and prolongs the working time of the system.

Brief description of the drawing

DRAWINGS

1 is a schematic flow chart of a method for controlling a portable speaker according to an embodiment of the present invention;

2 is a schematic flow chart of a method for controlling a portable speaker according to an embodiment of the present invention;

3 is a schematic flow chart of a method for controlling a portable speaker according to an embodiment of the present invention;

4 is a schematic flow chart of a method for controlling a portable speaker according to another embodiment of the present invention; 5 is a schematic block diagram showing the structure of a control device for a portable speaker according to an embodiment of the present invention;

6 is a schematic block diagram showing the structure of a gain unit according to an embodiment of the present invention;

7 is a schematic block diagram showing the structure of a control device for a portable speaker according to an embodiment of the present invention;

8 is a schematic block diagram showing the structure of a control device for a portable speaker according to an embodiment of the present invention;

9 is a schematic block diagram showing the structure of a control device for a portable speaker according to another embodiment of the present invention.

[0063]

[0064] The implementation, functional features, and advantages of the present invention will be further described with reference to the accompanying drawings.

BEST MODE FOR CARRYING OUT THE INVENTION

The specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0066] Referring to FIG. 1, an embodiment of the present invention provides a method for controlling a portable speaker, including the following steps:

[0067] 51. Acquire a remaining battery capacity of the battery of the portable speaker.

[0068] In this step, the battery is generally a rechargeable battery, and the MCU of the portable speaker always reads the remaining battery power through the battery management system, for example, obtaining the remaining battery power through common ADC sampling.

[0069] 52. Find a gain value corresponding to the remaining power in a preset gain list.

[0070] In this step, the gain list is a list in which the remaining power and its corresponding gain value are set. For example, the remaining power is X吋, and the corresponding gain value is Y or the like.

[0071] 53. Adjust a power amplifier gain of the portable speaker according to the gain value.

[0072] In this step, adjusting the power amplifier gain of the portable speaker generally reduces the power amplifier gain to reduce the system voltage ripple. For example, the maximum output power of the C3101 power amplifier is about 2W. When the voltage is 3.7V, the current is about 600 mA, and the voltage ripple is about 150mV. When the voltage drops to 3.5V and below, the constant power does not change, and the current required by the amplifier increases to 700mA or more. The voltage ripple increases to 200mV, and the transient minimum voltage is close to the system's minimum operating voltage of 3.2V. When the battery voltage drops further, the current required to output 2W power will exceed the maximum current of the battery by 1C or 800mA. The same system will enter the shutdown state because the instantaneous voltage is lower than 3.3V. The same speaker will have noise due to insufficient power. When this is done until the automatic shutdown, the test voltage is 3.5V after one minute, and about 10<3⁄4-12<3⁄4 of power remains. After reducing the power amplifier gain, for example, the C3101 system The 2dB gain is reduced at 3.5V, the current drops to approximately 420mA, and the voltage ripple is less than 80mV. The actual test system can be turned off for 12 minutes, and the battery is fully utilized. After the system is played to auto power off, the test voltage is about 3.39V after one minute, and the actual remaining power is about 2<3⁄4-3<3⁄4.

[0073] In this embodiment, the step S3 of adjusting the power amplifier gain of the portable speaker according to the gain value includes:

[0074] S31, adjusting power of the power amplifier input end of the portable speaker according to the gain value, or

[0075] S32. Adjust a power amplifier magnification of the portable speaker according to the gain value.

[0076] The power amplifier gain of the portable speaker can be realized by the above steps S11 or S12, and the methods for adjusting the gain of the power amplifier are both very simple and easy to implement.

[0077] Referring to FIG. 2, in the embodiment, before the step S2 of searching for a gain value corresponding to the remaining power in the preset gain list, the method includes:

[0078] S201. Determine whether the remaining power is reduced to a preset power;

[0079] S202. If yes, generate an instruction to search for the gain value in the gain list.

[0080] In the above steps S201 and S202, the portable speaker does not always search for the corresponding gain value for each residual voltage in the gain list to save resources, so a preset power is set, when the remaining power and the pre-charge If the power is the same, it means that the portable speaker is about to break, etc., so it is necessary to adjust the power amplifier gain. Then, the command to find the gain value in the gain list is generated, and the subsequent search list and gain adjustment steps are performed. .

[0081] In this embodiment, only one gain value is set in the above gain list, and the gain value is 2 dB. Because the volume and playback power of the portable speaker are relatively small, when the 2dB gain is reduced, it has been reduced a lot, and it can completely prevent the occurrence of breakage. In other embodiments, multiple sets of corresponding remaining power and gain values may be pre-set in the gain list, that is, multiple sets of gain adjustment gears are set, which can smoothly reduce the power amplifier gain and ensure a smooth change of the portable speaker output.

Referring to FIG. 3, in the embodiment, after the step S3 of adjusting the power amplifier gain of the portable speaker according to the gain value, the method includes:

[0083] S4, determining whether the portable speaker is inserted into an external power source;

[0084] S5. If yes, restore the audio playing state of the portable speaker before the remaining power.

[0085] As described in steps S101 and S102 above, if the portable speaker is plugged into an external power source, it will be used directly. The energy of the external power supply, so the power is sufficient, and there is no such thing as breakage due to insufficient power. Therefore, the portable speaker is restored to the normal audio playback state by the audio playback state of reducing the power amplifier gain, that is, the battery is fully charged. Audio playback status, improve the playback of portable speakers.

[0086] In another embodiment, before the step of searching for a gain value corresponding to the remaining power in the preset gain list, the method includes:

Obtaining a system voltage of the portable speaker;

[0088] determining whether the system voltage changes within a preset time to reach a preset value;

[0089] If yes, an instruction to find the gain value in the gain list is generated.

[0090] For example, when a system voltage of 3.5V is detected, the system drops to 3.3V or less within a short preset period (usually tens of milliseconds), which determines that the voltage ripple is too large. It is easy to cause the audio output of the speaker to be distorted, thus generating an instruction to find the gain value in the gain list, and the gain can be adjusted.

[0091] Referring to FIG. 4, in another embodiment, before the step S2 of searching for a gain value corresponding to the remaining power in the preset gain list, the method includes:

[0092] S203. Obtain a system voltage ripple of the portable speaker.

[0093] S204. Determine whether the system voltage ripple is greater than a preset ripple threshold.

[0094] S205. If yes, generate an instruction to search for the gain value in the gain list.

[0095] As described in steps S203, S204 and S205 above, the system voltage ripple of the portable speaker is an important factor affecting the stable operation of the portable speaker chip, so according to the magnitude of the system voltage ripple, it can be determined whether the portable speaker is about to appear. Breaking the sound and so on, so it can be used as a condition to adjust the power amplifier gain of the portable speaker, which can effectively improve the accuracy of judging whether the portable speaker really needs to reduce the power amplifier gain.

[0096] The control method of the portable speaker according to the embodiment of the present invention adjusts the power amplifier gain according to the remaining power of the battery of the portable speaker, reduces the system voltage ripple, thereby improving the working stability of the portable speaker chip; and preventing the battery from being low in power. When the speaker is broken, it saves the power wasted by the broken sound of the power supply of the power amplifier, which prolongs the working time of the system.

[0097] Referring to FIG. 5, the present invention further provides a control device for a portable speaker, including:

[0098] The first obtaining unit 10 is configured to acquire a remaining power of the battery of the portable speaker.

[0099] The above battery is generally a rechargeable battery, and the MCU of the portable speaker is always read by the battery management system. The remaining battery power, such as the usual battery sampling, etc., to obtain the remaining battery power.

[0100] The searching unit 20 is configured to search for a gain value corresponding to the remaining power in the preset gain list.

[0101] The above gain list is a list in which the remaining power and its corresponding gain value are set. For example, the remaining power is X吋, and the corresponding gain is Y or the like.

[0102] The gain unit 30 is configured to adjust a power amplifier gain of the portable speaker according to the gain value.

[0103] Adjusting the power amplifier gain of the portable speaker generally reduces the power amplifier gain to reduce the system voltage ripple. For example, the maximum output power of C3101 power amplifier is about 2W. When the voltage is 3.7V, the current is about 600mA, the voltage ripple is about 150mV. When the voltage drops to 3.5V and below, the constant power does not change, and the current required by the power amplifier increases to more than 700mA. The voltage ripple increases to 200mV, and the transient minimum voltage is close to the system's minimum operating voltage of 3.2V. When the battery voltage drops further, the current required to output 2W power will exceed the maximum current of the battery, 1 C or 800 mA. The same system will enter the shutdown state because the instantaneous voltage is lower than 3.3V. The same speaker will have noise due to insufficient power. . When this is done until the automatic shutdown, the test voltage is 3.5V after one minute, and about 10<3⁄4-12<3⁄4 remains. After reducing the power amplifier gain, for example, the C3101 system reduces the 2d B gain at 3.5V, the current drops to approximately 420mA, and the voltage ripple is less than 80mV. The actual test system can be turned off for 12 minutes and the battery is fully utilized. After the system is played back to auto power off, the test voltage is about 3.39V after one minute, and the actual remaining power is about 2<3⁄4-3<3⁄4.

[0104] Referring to FIG. 6, in the embodiment, the gain unit 30 includes: a first gain module 31, configured to adjust power of a power amplifier input end of the portable speaker according to the gain value; or, the second gain module 32 And for adjusting a power amplifier magnification of the portable speaker according to the gain value.

[0105] The first gain module 11 and the second gain module 12 are two devices for adjusting the gain of the power amplifier, which can realize the power amplifier gain of the portable speaker, and the methods for adjusting the gain of the power amplifier are both simple and easy to implement.

[0106] Referring to FIG. 7, in the embodiment, the control device for the portable speaker further includes:

[0107] The first determining unit 201 is configured to determine whether the remaining power is reduced to a preset power;

[0108] The first generating unit 202 is configured to generate an instruction to search for the gain value in the gain list if it is determined that the remaining power is reduced to a preset power.

[0109] The portable speaker does not always search for the corresponding gain value for each residual voltage in the gain list to save resources, so a preset power is set, and the determining module 201 determines the remaining power and the preset power. The same amount, indicating that the portable speaker is about to break, etc., so it is necessary to adjust the power amplifier gain. The 吋 generating module 202 generates an instruction to find the gain value in the gain list, and performs subsequent lookup lists and adjustment gains. And so on.

[0110] In this embodiment, in the embodiment, only one gain value is set in the gain list, and the gain value is 2 dB. Because the volume and playing power of the portable speaker are relatively small, when the 2dB gain is reduced, it has actually been reduced a lot, and it can completely prevent the occurrence of breakage. In other embodiments, multiple sets of corresponding remaining power and gain values may be pre-set in the profit list, that is, multiple sets of gain adjustment gears are set, which can smoothly reduce the power amplifier gain and ensure a smooth change of the portable speaker output.

[0111] Referring to FIG. 8, in the embodiment, the control device for the portable speaker further includes:

[0112] The second determining unit 40 is configured to determine whether the portable speaker is plugged into an external power source;

[0113] The recovery unit 50 is configured to restore an audio playing state of the portable speaker before the remaining power when the portable speaker is determined to be plugged into an external power source.

[0114] If the portable speaker is plugged into an external power source, the energy of the external power source is directly used, so that the power is sufficient, and there is no occurrence of breakage due to insufficient power, so the portable speaker is reduced in audio playback state by the power amplifier. Resume to the normal audio playback state, that is, the audio playback state of the battery is sufficient, and improve the playback effect of the portable speaker.

[0115] In an embodiment, the control device of the portable speaker further includes:

[0116] an obtaining module, configured to acquire a system voltage of the portable speaker;

[0117] a determining module, configured to determine whether the system voltage changes within a preset time to reach a preset value;

[0118] a generating module, configured to generate an instruction to search for the gain value in the gain list.

[0119] Referring to FIG. 9, in the embodiment, the control device for the portable speaker further includes:

[0120] a second obtaining unit 203, configured to acquire a system voltage ripple of the portable speaker;

[0121] The third determining unit 204 is configured to determine whether the system voltage ripple is greater than a preset ripple threshold; [0122] the second generating unit 205 is configured to determine that the system voltage ripple is greater than a preset The ripple threshold then generates an instruction to look up the gain value in the gain list.

[0123] The system voltage ripple of the portable speaker mentioned above is an important factor affecting the stable operation of the portable speaker chip. Therefore, according to the magnitude of the system voltage ripple, it can be judged whether the portable speaker is about to break, etc., so it can be used as a Whether it is necessary to adjust the condition of the power amplifier gain of the portable speaker, Effectively improve the accuracy of judging whether the portable speaker really needs to reduce the power amplifier gain.

[0124] The control device of the portable speaker according to the embodiment of the present invention adjusts the power amplifier gain according to the remaining power of the battery of the portable speaker, reduces the system voltage ripple, thereby improving the working stability of the portable speaker chip; and preventing the battery from being low in power. When the speaker is broken, it saves the power wasted by the broken sound of the power supply of the power amplifier, which prolongs the working time of the system.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are used directly or indirectly. Other related technical fields are equally included in the scope of patent protection of the present invention.

Claims

Claim

[Claim 1] A method for controlling a portable speaker, comprising:

Obtaining a remaining battery power of the portable speaker;

Finding a gain value corresponding to the remaining power in a preset gain list; adjusting a power amplifier gain of the portable speaker according to the gain value.

[Claim 2] The control method of the portable speaker according to claim 1, wherein the step of adjusting the power amplifier gain of the portable speaker according to the gain value comprises:

Adjusting the power of the power amplifier input end of the portable speaker according to the gain value.

[Claim 3] The control method of the portable speaker according to claim 1, wherein the step of adjusting the power amplifier gain of the portable speaker according to the gain value comprises:

Adjusting a power amplifier magnification of the portable speaker according to the gain value.

[Claim 4] The control method of the portable speaker according to claim 1, wherein the step of searching for a gain value corresponding to the remaining power in the preset gain list includes:

Determining whether the remaining power is reduced to a preset power;

If so, an instruction to look up the gain value in the gain list is generated.

[Claim 5] The control method of the portable speaker according to claim 1, wherein only one gain value is set in the gain list.

[Claim 6] The control method of the portable speaker according to claim 5, wherein the gain value is 2 dB.

[Claim 7] The control method of the portable speaker according to claim 1, wherein the step of searching for a gain value corresponding to the remaining power in the preset gain list includes:

Obtaining a system voltage of the portable speaker;

Determining whether the system voltage changes within a preset time to reach a preset value;

If so, an instruction to look up the gain value in the gain list is generated.

[Claim 8] The control method of the portable speaker according to claim 1, wherein before the step of searching for a gain value corresponding to the remaining power in the preset gain list, include:

Obtaining a system voltage ripple of the portable speaker;

If so, an instruction to look up the gain value in the gain list is generated.

A control device for a portable speaker, comprising:

a first obtaining unit, configured to acquire a remaining amount of power of the battery of the portable speaker; and a searching unit, configured to search, in a preset gain list, a gain value corresponding to the remaining power;

And a gain unit, configured to adjust a power amplifier gain of the portable speaker according to the gain value. The control device for a portable speaker according to claim 9, wherein the profit unit comprises:

And a first gain module, configured to adjust power of the power amplifier input end of the portable speaker according to the gain value.

The control device for a portable speaker according to claim 9, wherein the profit unit comprises:

And a second gain module, configured to adjust a power amplifier amplification factor of the portable speaker according to the gain value.

The control device for a portable speaker according to claim 9, further comprising a first determining unit, configured to determine whether the remaining power is reduced to a preset power; the first generating unit, configured to determine the remaining The power is reduced to a preset power, and an instruction to find the gain value in the gain list is generated.

A control device for a portable speaker according to claim 9, wherein only one gain value is set in said gain list.

The control device for a portable speaker according to claim 13, wherein said gain value is 2 dB.

A control method for a portable speaker according to claim 9, further comprising An acquisition module, configured to acquire a system voltage of the portable speaker;

The determining module is configured to determine whether the system voltage changes within a preset time to reach a preset value generating module, and if yes, generate an instruction to search for the gain value in the gain list.

[Claim 16] The control device for a portable speaker according to claim 9, further comprising a second acquiring unit, configured to acquire a system voltage ripple of the portable speaker; and a third determining unit, configured to determine Whether the system voltage ripple is greater than a preset ripple threshold second generating unit, if it is determined that the system voltage ripple is greater than a preset ripple threshold, generating a search for the gain value in the gain list Instructions.