CN110225434A - Excess temperature protection method, device and computer storage medium and electronic equipment - Google Patents
Excess temperature protection method, device and computer storage medium and electronic equipment Download PDFInfo
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- CN110225434A CN110225434A CN201910472192.9A CN201910472192A CN110225434A CN 110225434 A CN110225434 A CN 110225434A CN 201910472192 A CN201910472192 A CN 201910472192A CN 110225434 A CN110225434 A CN 110225434A
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- loudspeaker
- impedance
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- change
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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
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/05—Detection of connection of loudspeakers or headphones to amplifiers
Abstract
The embodiment of the present application discloses a kind of excess temperature protection method, device and computer storage medium and electronic equipment; this method comprises: during loudspeaker plays music; it is acquired by the impedance to the loudspeaker, obtains the first impedance value of the loudspeaker；According to the reference impedance value of the loudspeaker and first impedance value, the corresponding impedance rate of change of the loudspeaker is determined；Wherein, the reference impedance value is to be acquired before playing music to the impedance of the loudspeaker；Based on determining impedance rate of change, controls intelligent power amplifier and overheat protector processing is carried out to the loudspeaker.
Description
Technical field
This application involves power electronics fields more particularly to a kind of excess temperature protection method, device and computer to deposit
Storage media and electronic equipment.
Background technique
With advances in technology and develop, the development of intelligent power amplifier (Smart Power Amplifier, SPA)
It is more and more mature, it is largely used on the electronic equipments such as smart phone, such as drive the speaker etc..Since loudspeaker is usual
Large driven current density is needed, and is Yi Fare in work, loudspeaker fever in order to prevent seriously causes to burn phenomenon, at present may be used
To carry out overheat protector using intelligent power amplifier.
In current traditional solution, there are contact connections between speaker cavity and circuit board, it will usually in contact
Place coats grease to prevent the oxidation of contact.During music, the vibration of speaker cavity can bring the shake of contact
It is dynamic, lead to that grease may be introduced under contact, the impedance for causing loudspeaker increases；At this time intelligent power amplifier will mistakenly believe that
The temperature of loudspeaker is excessively high and causes loudspeaker noiseless, to there is the possibility of accidentally protection.
Summary of the invention
The main purpose of the application is to propose a kind of excess temperature protection method, device and computer storage medium and electronics
Equipment not only realizes overheat protector function, but also also reduces the probability of accidentally protection.
In order to achieve the above objectives, the technical solution of the application is achieved in that
In a first aspect, the embodiment of the present application provides a kind of excess temperature protection method, which is characterized in that the described method includes:
During loudspeaker plays music, it is acquired by the impedance to the loudspeaker, obtains the loudspeaking
First impedance value of device；
According to the reference impedance value of the loudspeaker and first impedance value, the corresponding impedance of the loudspeaker is determined
Change rate；Wherein, the reference impedance value is to be acquired before playing music to the impedance of the loudspeaker；
Based on determining impedance rate of change, controls intelligent power amplifier and overheat protector processing is carried out to the loudspeaker.
Second aspect, the embodiment of the present application provide a kind of over-temperature protection device, and the over-temperature protection device includes: acquisition
Unit, determination unit and control unit；Wherein,
The acquisition unit, be configured to loudspeaker play music during, by the impedance to the loudspeaker into
Row acquisition, obtains the first impedance value of the loudspeaker；
The determination unit is configured to reference impedance value and first impedance value according to the loudspeaker, determines
The corresponding impedance rate of change of the loudspeaker；Wherein, the reference impedance value is before playing music to the loudspeaker
What impedance was acquired；
Described control unit is configured to determining impedance rate of change, controls intelligent power amplifier to the loudspeaking
Device carries out overheat protector processing.
The third aspect, the embodiment of the present application provide a kind of over-temperature protection device, and the over-temperature protection device includes: storage
Device and processor；Wherein,
The memory, for storing the computer program that can be run on the processor；
The processor, for the step of when running the computer program, executing method as described in relation to the first aspect.
Fourth aspect, the embodiment of the present application provide a kind of computer storage medium, the computer storage medium storage
There is overheat protector program, method as described in relation to the first aspect is realized when the overheat protector program is executed by least one processor
The step of.
5th aspect, the embodiment of the present application provide a kind of electronic equipment, and the electronic equipment includes at least loudspeaker, intelligence
It can power amplifier and the over-temperature protection device as described in second aspect or the third aspect.
A kind of excess temperature protection method, device provided by the embodiment of the present application and computer storage medium and electronics are set
Standby, this method is applied to over-temperature protection device, and over-temperature protection device is located in electronic equipment.The mistake of music is played in loudspeaker
Cheng Zhong is acquired by the impedance to the loudspeaker, obtains the first impedance value of the loudspeaker；According to the loudspeaker
Reference impedance value and first impedance value, determine the corresponding impedance rate of change of the loudspeaker；Wherein, the benchmark resistance
Anti- value is to be acquired before playing music to the impedance of the loudspeaker；Based on determining impedance rate of change, control
Intelligent power amplifier processed carries out overheat protector processing to the loudspeaker；In this way, being protected by introducing impedance rate of change to excess temperature
Shield processing is controlled, and overheat protector function is not only realized, but also also reduces the probability of accidentally protection, is effectively prevented simultaneously
Due to contact impedance increase and be mistaken for loudspeaker temperature it is excessively high caused by loudspeaker without voice output the phenomenon that.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of excess temperature protection method provided by the embodiments of the present application；
Fig. 2 is a kind of electrical block diagram of intelligent power amplifier provided by the embodiments of the present application；
Fig. 3 is the contact connection schematic diagram of a kind of electronic equipment provided by the embodiments of the present application；
Fig. 4 is a kind of detailed process schematic diagram of traditional excess temperature protection method provided by the embodiments of the present application；
Fig. 5 is a kind of detailed process schematic diagram of excess temperature protection method provided by the embodiments of the present application；
Fig. 6 is the detailed process schematic diagram of another excess temperature protection method provided by the embodiments of the present application；
Fig. 7 is a kind of composed structure schematic diagram of over-temperature protection device provided by the embodiments of the present application；
Fig. 8 is a kind of specific hardware structure schematic diagram of over-temperature protection device provided by the embodiments of the present application；
Fig. 9 is the composed structure schematic diagram of a kind of electronic equipment provided by the embodiments of the present application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiment is some embodiments of the present application, instead of all the embodiments.Based on this Shen
Please in embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall in the protection scope of this application.
Power amplifier referred to as " power amplifier " refers under conditions of given distortion rate, can generate maximum power output to drive
Move the amplifier of a certain load (such as loudspeaker)；And intelligent power amplifier, referred to as " intelligent power output amplification ", it and power amplifier
It compares, maximum difference is to increase signal feedback.Intelligent power amplifier can specially improve the music output of electronic equipment
Dynamic range and the state of dynamically track loudspeaker simultaneously perceive the variation of its local environment and are adaptively adjusted, and are
The music of loudspeaker brings higher volume and better sound quality in electronic equipment.Currently, intelligent power amplifier is in intelligence
It can mobile phone, palm PC, personal digital assistant (Personal Digital Assistant, PDA), portable media player
It is largely used on the electronic equipments such as (Portable Media Player, PMP), desktop computer.
It is to be appreciated that loudspeaker usually requires biggish electric current to drive, and Yi Fare when speaker operation, in order to
It prevents loudspeaker fever from seriously causing to burn phenomenon, can use intelligent power amplifier and carry out overheat protector.Wherein, the mistake
The working principle of temperature protection is when loudspeaker is during playing music, and loudspeaker can generate heat, so as to cause the temperature of loudspeaker
It increases, and then impedance is caused to increase；In this way, can be by the impedance of monitoring loudspeaker, to realize the monitoring to loudspeaker temperature.
Many manufacturers mix a sine wave signal during loudspeaker plays music in music, pass through detection sine wave letter
Number voltage and current, it will be able to realize monitoring loudspeaker impedance, to achieve the purpose that be monitored loudspeaker temperature.
The embodiment of the present application provides a kind of excess temperature protection method, and this method is applied to over-temperature protection device, and excess temperature is protected
Protection unit is located in electronic equipment.During loudspeaker plays music, it is acquired by the impedance to the loudspeaker,
Obtain the first impedance value of the loudspeaker；According to the reference impedance value of the loudspeaker and first impedance value, determine
The corresponding impedance rate of change of the loudspeaker；Wherein, the reference impedance value is before playing music to the loudspeaker
What impedance was acquired；Based on determining impedance rate of change, controls intelligent power amplifier and the loudspeaker was carried out
Warm protection processing；In this way, controlling according to the situation of change of impedance overheat protector processing, overheat protector function is not only realized
Can, and the probability of accidentally protection is also reduced, while effectively preventing being mistaken for loudspeaker temperature since contact impedance increases
Spend the phenomenon that loudspeaker caused by height is without voice output.
Each embodiment of the application is described in detail below in conjunction with attached drawing.
Referring to Fig. 1, it illustrates a kind of flow diagrams of excess temperature protection method provided by the embodiments of the present application.Such as Fig. 1
Shown, this method may include:
S101: it during loudspeaker plays music, is acquired by the impedance to the loudspeaker, described in acquisition
First impedance value of loudspeaker；
It should be noted that, when electronic equipment plays music by loudspeaker, at this time may be used for electronic equipment
To acquire the impedance of loudspeaker, to obtain the first impedance value of loudspeaker.Wherein, the impedance for acquiring loudspeaker can be in real time
Acquisition, it is also possible to periodically to acquire, can also be randomness acquisition；In practical applications, according to the actual situation into
Row setting, the embodiment of the present application are not especially limited.
It should also be noted that, can be the music institute played by acquisition loudspeaker for the impedance for acquiring loudspeaker
What corresponding voltage value and current value were calculated.Therefore, in some embodiments, for S101, which can
To include:
Acquire the corresponding voltage value of the loudspeaker and current value；
It is calculated according to the voltage value and the current value, obtains the first impedance value of the loudspeaker.
For most manufacturers, during loudspeaker plays music, a sine can be mixed in music
Wave signal.In this way, the corresponding voltage value of acquisition loudspeaker and current value, can specifically refer to the voltage for acquiring the sine wave signal
Value and current value；To the empirical equation calculated according to collected voltage value and current value, combined impedance, so that it may be somebody's turn to do
First impedance value of loudspeaker.
Referring to fig. 2, it illustrates a kind of electrical block diagrams of intelligent power amplifier provided by the embodiments of the present application.
As shown in Fig. 2, the model that the intelligent power amplifier uses is MAX98928WLCSP, it is electric around the intelligent power amplifier
Line structure is as shown in Figure 2；Wherein, SPK+, SPK- indicate the output signal of intelligent power amplifier, sound for controlling loudspeaker
Or loudspeaker is without voice output；SPK_SENSE_P, SPK_SENSE_N indicate voltage acquisition signal, for obtaining collected electricity
Volume corresponding to pressure value and the voltage value；In this way, according to the collected voltage value of institute and current value, so that it may calculate
To the first impedance value of loudspeaker, so as to the subsequent further temperature increase for obtaining loudspeaker, thus by controlling intelligent function
The output signal of rate amplifier exports to control loudspeaker sound or silence.
S102: according to the reference impedance value of the loudspeaker and first impedance value, determine that the loudspeaker is corresponding
Impedance rate of change；Wherein, the reference impedance value is to be acquired before playing music to the impedance of the loudspeaker
It arrives；
It should be noted that after electronic equipment booting, and before loudspeaker plays music, it at this time can also be right
The impedance of loudspeaker is acquired, to obtain the reference impedance value (the also referred to as basal impedance value of loudspeaker) of loudspeaker.Cause
This, in some embodiments, before S101, this method can also include:
Before loudspeaker plays music, the impedance of the loudspeaker is acquired, the benchmark of the loudspeaker is obtained
Impedance value.
That is, can at this time be acquired, will acquire to the impedance of loudspeaker before loudspeaker plays music
Reference impedance value of the impedance value arrived as loudspeaker measures subsequent impedance variations situation (such as impedance rate of change) with this
With temperature variations (such as temperature increase).
In this way, during playing music, can use benchmark resistance after getting the reference impedance value of loudspeaker
Anti- value and the first impedance value acquired in real time measure the impedance variations situation of loudspeaker；Such as impedance variations are to increase suddenly
, or slowly increase.That is, after the reference impedance value for getting loudspeaker and the first impedance value, according to this
Impedance differences and acquisition time difference between reference impedance value and the first impedance value, can determine the corresponding resistance of loudspeaker
Resistance rate.
Further, after getting the reference impedance value of loudspeaker, can also using the reference impedance value and in real time
First impedance value of acquisition measures the temperature variations of loudspeaker.For loudspeaker, the corresponding impedance of the loudspeaker
Calculated relationship between temperature can directly acquire, it is related with loudspeaker self-characteristic；In this way, according to impedance and temperature
Calculated relationship between degree can determine the temperature variations of loudspeaker.Therefore, in some embodiments, this method is also
May include:
Reference impedance value and first impedance value to the loudspeaker carry out difference calculating, obtain impedance increase
Value；
Based on the calculated relationship between the impedance and temperature obtained in advance, the corresponding temperature liter of the impedance value added is determined
High level.
That is, passing through the difference meter of the two after getting the reference impedance value and the first impedance value of loudspeaker
It calculates, available impedance value added；Then according to the calculated relationship between impedance and temperature, the impedance value added can be determined
Corresponding temperature increase, to obtain the temperature variations of loudspeaker.
S103: it based on determining impedance rate of change, controls intelligent power amplifier and overheat protector is carried out to the loudspeaker
Processing.
It should be noted that loudspeaker has voice output or without voice output, can pass through intelligent power amplifier
Output signal (than SPK+, SPK- as shown in Figure 2) is come what is controlled, so as to realize the overheat protector processing of loudspeaker.
It should also be noted that, carrying out overheat protector processing to loudspeaker using intelligent power amplifier, mainly pass through
The impedance of loudspeaker is acquired to achieve the purpose that monitor loudspeaker temperature.Typically, impedance value increases, and illustrates loudspeaker
Temperature increases；It, can be by hindering according to the calculated relationship between impedance and temperature and based on the reference impedance value of loudspeaker
Anti- value added extrapolates the temperature increase of loudspeaker.Thus it is possible, on the one hand, can be sentenced according to the temperature increase of loudspeaker
It is disconnected whether to need to carry out overheat protector processing to loudspeaker；On the other hand, can also further be judged according to impedance rate of change
Whether need to carry out overheat protector processing to loudspeaker.Therefore, in some embodiments, for S103, which can be with
Include:
When the impedance rate of change is less than default change rate threshold value and the temperature increase is more than preset temperature threshold,
Overheat protector processing is carried out to the loudspeaker by the intelligent power amplifier.
It should be noted that default change rate threshold value is preset for measuring whether loudspeaker executes overheat protector
The change rate decision content of processing, such as default change rate threshold value can be 10 Ω/s；Preset temperature threshold is preset use
In measure loudspeaker whether the temperature decision content of overheat protector processing, for example preset temperature threshold can be 40 DEG C；Actually answering
In, presets change rate threshold value and preset temperature threshold and set according to the actual conditions of loudspeaker, the embodiment of the present application is not made to have
Body limits.
By taking the electronic equipments such as smart phone as an example, speaker cavity (BOX) and flexible circuit (Flexible Printed
Circuit, FPC) it is connected for contact between plate；As shown in figure 3, it illustrates a kind of electronic equipment provided by the embodiments of the present application
Contact connection schematic diagram.Contact is oxidized and corrodes in order to prevent, it will usually the anti-oxidation materials such as grease are coated at contact.
In this way, the vibration of speaker cavity can bring the vibration of contact during loudspeaker plays music, thus may under contact
Grease can be introduced, the impedance for causing loudspeaker increases.In current traditional solution, as shown in figure 4, according to impedance
Value added extrapolate the temperature increase of loudspeaker after, which only accounts for the temperature change of loudspeaker,
It whether is more than preset temperature threshold to determine whether needing to carry out overheat protector processing to loudspeaker by temperature increase；Tool
Body the step of returning to front, continues to execute the impedance to loudspeaker if temperature increase is no more than preset temperature threshold
It is acquired in real time；If temperature increase is more than preset temperature threshold, loudspeaker was carried out by intelligent power amplifier
Warm protection processing, control loudspeaker pause play music.In this way, leading to impedance due to introducing grease at the contact of loudspeaker
When increasing excessive, the temperature increase obtained at this time is excessive, and at this time intelligent power amplifier may will mistakenly believe that loudspeaker temperature
Height is spent, so that overheat protector processing is carried out to loudspeaker, so that loudspeaker brings very bad user's body without voice output
It tests.
The embodiment of the present application also additionally considers the impedance of loudspeaker other than the temperature change that loudspeaker can be considered
Variation, i.e., according to determining impedance rate of change, if the impedance rate of change is less than default change rate threshold value, showing impedance value is
Slowly increase, then can determine that the variation of the impedance is caused by generating heat loudspeaker, at this time to can control intelligence
Energy power amplifier carries out overheat protector processing to loudspeaker；If the impedance rate of change is not less than default change rate threshold value, table
Clear impedance value increases suddenly, then can determine the variation of the impedance be by contact at contact impedance increase led
It causes, at this time can control intelligent power amplifier and overheat protector processing is not carried out to loudspeaker, also avoid the operating condition
The phenomenon that lower loudspeaker is without voice output solves the mistake protection problem in traditional solution.That is, the embodiment of the present application
Excess temperature protection method not only allow for the temperature increase of loudspeaker, and also contemplate the impedance rate of change of loudspeaker；From
And the optimization to traditional solution is realized, the probability of accidentally protection is reduced, while effectively preventing connecing at due to contact
Touching impedance increases and is mistaken for the phenomenon that excessively high caused loudspeaker of loudspeaker temperature is without voice output.
Since the embodiment of the present application considers the temperature change of loudspeaker and the impedance variations of loudspeaker simultaneously, in this way, holding
Row sequence is the judgement for first carrying out temperature change, the rear judgement for executing impedance variations, still first carry out impedance variations judgement, after
Execute temperature change judgement, the effect achieved of the two be it is identical, sequence is executed for this, the embodiment of the present application is not made to have
Body limits.
In another embodiment of the application, it is assumed that execution sequence is the judgement for first carrying out impedance variations, executes temperature afterwards
Spend the judgement of variation.In this way, in some embodiments, it is described when the impedance rate of change is less than default become for S103
When rate threshold value and the temperature increase are more than preset temperature threshold, by the intelligent power amplifier to the loudspeaker
Overheat protector processing is carried out, which may include:
Judge whether the impedance rate of change is less than default change rate threshold value；
When the impedance rate of change is less than default change rate threshold value, judge whether the temperature increase is more than default temperature
Spend threshold value；
When the temperature increase is more than preset temperature threshold, by the intelligent power amplifier to the loudspeaker
Carry out overheat protector processing.
Further, in some embodiments, judge the impedance rate of change whether be less than default change rate threshold value it
Afterwards, this method can also include:
When the impedance rate of change is not less than default change rate threshold value, using first impedance value as the loudspeaker
Reference impedance value, continue to execute the step of being acquired to the impedance of the loudspeaker.
Further, in some embodiments, after judging whether the temperature increase is more than preset temperature threshold,
This method can also include:
When the temperature increase is no more than preset temperature threshold, continues to execute and the impedance of the loudspeaker is adopted
The step of collection.
It should be noted that in order to reduce the probability of accidentally protection, the embodiment of the present application is sentenced not only according to impedance rate of change
It is disconnected whether to need to carry out overheat protector processing to loudspeaker, but also further judged according to the temperature increase of loudspeaker be
It is no to need to carry out overheat protector processing to loudspeaker.
Referring to Fig. 5, it illustrates a kind of detailed process schematic diagrames of excess temperature protection method provided by the embodiments of the present application.Such as
Shown in Fig. 5, after electronic equipment booting, the impedance of loudspeaker can be acquired first, using the impedance value as loudspeaking
The reference impedance value of device；Loudspeaker play music during, can also the impedance to loudspeaker acquired in real time, with must
To the first impedance value of loudspeaker；According to the reference impedance value of the loudspeaker and first impedance value, can determine
The corresponding impedance rate of change of the loudspeaker；In this way, first determining whether impedance rate of change is less than default change rate threshold value；When this
When impedance rate of change is not less than default change rate threshold value, shows impedance value and increase suddenly, then the impedance can be determined
Variation be contact at contact impedance increase caused by, it not will cause loudspeaker temperature raising so that occurred
Temperature can then return to the impedance to loudspeaker and carry out in real time using first impedance value as new reference impedance value at this time
The step of acquisition, continues to execute the excess temperature protection method of the embodiment of the present application；When the impedance rate of change is less than default change rate threshold
It when value, shows impedance value and slowly increases, then can determine that the variation of the impedance is caused by loudspeaker fever
, the judgement of temperature change can be at this time executed, according to the conversion relation between impedance and temperature, is pushed away by the value added of impedance
Calculate the temperature increase of loudspeaker；Judge whether temperature increase is more than preset temperature threshold；When temperature increase is no more than
When preset temperature threshold, there is not excess temperature in the temperature for showing loudspeaker, then not needing through intelligent power amplifier pair
The loudspeaker carries out overheat protector processing, also may return to the step of being acquired in real time to the impedance of loudspeaker at this time, after
The continuous excess temperature protection method for executing the embodiment of the present application；When temperature increase is more than preset temperature threshold, loudspeaker is shown
Temperature there is excess temperature, then need by intelligent power amplifier to the loudspeaker carry out overheat protector processing so that loudspeaking
Device stops playing music, and still is returned to the step of being acquired in real time to the impedance of loudspeaker；In this way, stopping in loudspeaker
During only playing music, when the second impedance value of collected loudspeaker is less than default impedance threshold, then can be with
Loudspeaker is controlled by intelligent power amplifier to continue to play music.
In the embodiment of the present application, the specific implementation of previous embodiment is elaborated, is become not only according to impedance
Rate is to determine whether need to carry out loudspeaker overheat protector processing, but also according to the temperature increase of loudspeaker come into one
Step judges whether to need to carry out overheat protector processing to loudspeaker；To realize the optimization to traditional solution, reduce
The accidentally probability of protection, while effectively preventing the contact impedance at by contact and increasing and be mistaken for the excessively high institute of loudspeaker temperature
Cause the phenomenon that loudspeaker is without voice output.
In the another embodiment of the application, it is assumed that execution sequence is the judgement for first carrying out temperature change, executes resistance afterwards
The judgement of resistance.In this way, in some embodiments, it is described when the impedance rate of change is less than default become for S103
When rate threshold value and the temperature increase are more than preset temperature threshold, by the intelligent power amplifier to the loudspeaker
Overheat protector processing is carried out, which may include:
Judge whether the temperature increase is more than preset temperature threshold；
When the temperature increase is more than preset temperature threshold, judge whether the impedance rate of change is less than default variation
Rate threshold value；
When the impedance rate of change is less than default change rate threshold value, by the intelligent power amplifier to the loudspeaking
Device carries out overheat protector processing.
Further, in some embodiments, judge the impedance rate of change whether be less than default change rate threshold value it
Afterwards, this method can also include:
When the impedance rate of change is not less than default change rate threshold value, using first impedance value as the loudspeaker
Reference impedance value, continue to execute the step of being acquired to the impedance of the loudspeaker.
Further, in some embodiments, judging whether the temperature increase is more than preset temperature threshold
Later, this method can also include:
When the temperature increase is no more than preset temperature threshold, continues to execute and the impedance of the loudspeaker is adopted
The step of collection.
It should be noted that in order to reduce the probability of accidentally protection, primarily directed to oily due to introducing at the contact of loudspeaker
Rouge and to cause impedance to increase excessive so that the excessive operating condition of the temperature increase being calculated is for further processing；Based on this,
It may be incorporated into impedance rate of change on the basis of traditional solution.That is, the embodiment of the present application is not only according to loudspeaking
The temperature increase of device to determine whether need to carry out loudspeaker overheat protector processing, but also according to impedance rate of change come into
One step judges whether to need to carry out overheat protector processing to loudspeaker.
Referring to Fig. 6, it illustrates the detailed process schematic diagrames of another excess temperature protection method provided by the embodiments of the present application.
As shown in fig. 6, can be acquired first to the impedance of loudspeaker after electronic equipment booting, using the impedance value as raising
The reference impedance value of sound device；Loudspeaker play music during, can also the impedance to loudspeaker acquired in real time, with
Obtain the first impedance value of loudspeaker；Impedance can be calculated according to the reference impedance value of loudspeaker and the first impedance value to increase
Value, according to the conversion relation between impedance and temperature, the temperature increase of loudspeaker is extrapolated by the value added of impedance；In this way,
First determine whether temperature increase is more than preset temperature threshold；When temperature increase is no more than preset temperature threshold, show
There is not excess temperature in the temperature of loudspeaker, then not needing to carry out overheat protector to the loudspeaker by intelligent power amplifier
Processing, may return to the step of being acquired in real time to the impedance of loudspeaker at this time, continues to execute the mistake of the embodiment of the present application
Warm guard method；When temperature increase is more than preset temperature threshold, the temperature for showing loudspeaker is likely to occur excess temperature, at this moment
The judgement that time can execute impedance variations can be true according to the reference impedance value of the loudspeaker and first impedance value
Make the corresponding impedance rate of change of the loudspeaker；Judge whether impedance rate of change is less than default change rate threshold value；When the impedance
When change rate is not less than default change rate threshold value, shows impedance value and increase suddenly, then the change of the impedance can be determined
Change be contact at contact impedance increase caused by, it not will cause the temperature raising of loudspeaker or even excess temperature occurs,
It can then return to the impedance to loudspeaker using first impedance value as new reference impedance value at this time and be acquired in real time
The step of, continue to execute the excess temperature protection method of the embodiment of the present application；When the impedance rate of change is less than default change rate threshold value,
Impedance value is shown slowly to increase, then can determine the variation of the impedance be loudspeaker fever caused by, this
When loudspeaker temperature there is excess temperature, then need by intelligent power amplifier to the loudspeaker carry out overheat protector processing,
So that loudspeaker stops playing music, and it still is returned to the step of being acquired in real time to the impedance of loudspeaker；In this way,
Loudspeaker stops during playing music, when the second impedance value of collected loudspeaker is less than default impedance threshold, that
Loudspeaker can also be controlled by intelligent power amplifier to continue to play music.
In the embodiment of the present application, the specific implementation of previous embodiment is elaborated, not only according to loudspeaker
Temperature increase to determine whether need to carry out loudspeaker overheat protector processing, but also according to impedance rate of change come into one
Step judges whether to need to carry out overheat protector processing to loudspeaker；To realize the optimization to traditional solution, reduce
The accidentally probability of protection, while effectively preventing the contact impedance at by contact and increasing and be mistaken for the excessively high institute of loudspeaker temperature
Cause the phenomenon that loudspeaker is without voice output.
It is to be appreciated that can be controlled and be raised by intelligent power amplifier when carrying out overheat protector processing to loudspeaker
Sound device stops playing music, is in noiseless output state；During stopping playing music, since loudspeaker stops working
Leading to the temperature of loudspeaker reduces, and then the impedance of loudspeaker is caused to reduce；When impedance is reduced to default impedance threshold, at this moment
Time can also be restored to play music.Therefore, in the another embodiment of the application, for S103, which may include:
When the impedance rate of change is less than default change rate threshold value and the temperature increase is more than preset temperature threshold,
It controls intelligent power amplifier and exports first control signal；Wherein, the first control signal is stopped for controlling the loudspeaker
Only play music；
When the second impedance value of the loudspeaker is less than default impedance threshold, control intelligent power amplifier output second
Signal is controlled, the step of being acquired to the impedance of the loudspeaker is continued to execute；Wherein, the second control signal is for controlling
It makes the loudspeaker to continue to play music, second impedance value is during stopping playing music to the loudspeaker
What impedance was acquired.
It should be noted that since loudspeaker in the presence of no voice output and has voice output two states, corresponding, intelligent power
There is also two kinds of forms, such as first control signal and second control signal for the output signal of amplifier.Here, the first control letter
Number it can be used for controlling loudspeaker to stop playing music, loudspeaker is in noiseless output state at this time；Second control signal can be with
Continue to play music for controlling loudspeaker, loudspeaker is in sound output state at this time.
It should also be noted that, to be whether the preset impedance for measuring loudspeaker meets extensive for default impedance threshold
Replay the decision content put the music on；For example default impedance threshold can be equal to reference impedance value, the embodiment of the present application does not limit specifically
It is fixed.In this way, at this time being needed when temperature increase is more than preset temperature threshold and impedance rate of change is less than default change rate threshold value
Overheat protector processing is carried out to loudspeaker by intelligent power amplifier.Specifically, defeated by intelligent power amplifier first
First control signal out stops playing music to control loudspeaker, and loudspeaker is in noiseless output state；Stopping playing music
During, cause the temperature of loudspeaker to reduce since loudspeaker stops working, and then the impedance of loudspeaker is caused to reduce；When
It, at this time can be extensive when collected second impedance value is less than default impedance threshold after stopping playing music for a period of time
Replay is put the music on, and the excess temperature protection method of the embodiment of the present application is continued to execute.
It should also be noted that, showing impedance value is when the impedance rate of change is not less than default change rate threshold value
Increase suddenly, at this time it is considered that the variation of the impedance be contact at contact impedance increase caused by, it is not
The temperature that will cause loudspeaker increases or even occurs excess temperature.In this case, when the impedance rate of change becomes not less than default
When rate threshold value, this method can also include:
During loudspeaker plays music, the corresponding volume of loudspeaker is reduced；
When the third impedance value of the loudspeaker is equal to first impedance value, restore the corresponding sound of the loudspeaker
Amount continues to execute the progress of the impedance to the loudspeaker using first impedance value as the reference impedance value of the loudspeaker
The step of acquisition；Wherein, the third impedance value is to be acquired during volume reduces to the impedance of the loudspeaker
It obtains.
It should be noted that the corresponding volume of loudspeaker reduces or restores, it can be by intelligent power amplifier come real
It is existing.Specifically, according to determining impedance rate of change, if the impedance rate of change is less than default change rate threshold value, impedance is shown
Value slowly increases, then can determine that the variation of the impedance is caused by generating heat loudspeaker, can at this time to control
Intelligent power amplifier processed carries out overheat protector processing to loudspeaker；If the impedance rate of change is not less than default change rate threshold
Value, show impedance value and increase suddenly, then can determine the variation of the impedance be due to contact at contact impedance increase
Caused by big, intelligent power amplifier can be at this time first passed through to reduce the corresponding volume of loudspeaker；It is reduced in volume
In the process, when the third impedance value of the loudspeaker of acquisition is still equal to the first impedance value, i.e., there is no variations for impedance, also just into
One step show the impedance variation be contact at contact impedance increase caused by, intelligent power can be passed through at this time
Amplifier restores volume, and using first impedance value as reference impedance value, then proceedes to execute the embodiment of the present application
Excess temperature protection method.
It is also to be noted that the embodiment of the present application can also optimize the making material of contact, using preferably material, from
And the poor contact at contact is avoided, it is also just avoided as much as possible due to contact and leads to asking for contact impedance increase
Topic, to reduce the probability of accidentally protection.
Above mentioned embodiment provide a kind of excess temperature protection method, this method is applied to over-temperature protection device, and overheat protector
Device is located in electronic equipment.During loudspeaker plays music, it is acquired, is obtained by the impedance to the loudspeaker
Obtain the first impedance value of the loudspeaker；According to the reference impedance value of the loudspeaker and first impedance value, institute is determined
State the corresponding impedance rate of change of loudspeaker；Wherein, the reference impedance value is the resistance before playing music to the loudspeaker
It is anti-to be acquired；Based on determining impedance rate of change, controls intelligent power amplifier and excess temperature is carried out to the loudspeaker
Protection processing；In this way, controlling by introducing impedance rate of change overheat protector processing, overheat protector function is not only realized
Can, but also traditional overheat protector scheme is optimized, the probability of accidentally protection is reduced, while effectively preventing due at contact
Contact impedance increase and be mistaken for loudspeaker temperature it is excessively high caused by loudspeaker without voice output the phenomenon that.
Based on the identical inventive concept of previous embodiment, referring to Fig. 7, it illustrates a kind of mistakes provided by the embodiments of the present application
The composed structure of temperature protection device 70, the over-temperature protection device 70 may include: acquisition unit 701, determination unit 702 and control
Unit 703；Wherein,
The acquisition unit 701 is configured to pass through the impedance to the loudspeaker during loudspeaker plays music
It is acquired, obtains the first impedance value of the loudspeaker；
The determination unit 702 is configured to reference impedance value and first impedance value according to the loudspeaker, really
Determine the corresponding impedance rate of change of the loudspeaker；Wherein, the reference impedance value is before playing music to the loudspeaker
Impedance be acquired；
Described control unit 703, is configured to determining impedance rate of change, and control intelligent power amplifier is raised to described
Sound device carries out overheat protector processing.
In the above scheme, referring to Fig. 7, the over-temperature protection device 70 can also include computing unit 704, be configured to pair
The reference impedance value of the loudspeaker and first impedance value carry out difference calculating, obtain impedance value added；
The determination unit 702 is additionally configured to determine institute based on the calculated relationship between the impedance and temperature obtained in advance
State the corresponding temperature increase of impedance value added.
In the above scheme, referring to Fig. 7, the over-temperature protection device 70 can also include over-temperature protection unit 705, configuration
To pass through institute when the impedance rate of change is less than default change rate threshold value and the temperature increase is more than preset temperature threshold
It states intelligent power amplifier and overheat protector processing is carried out to the loudspeaker.
In the above scheme, referring to Fig. 7, the over-temperature protection device 70 can also include judging unit 706, be configured to sentence
Whether the impedance rate of change of breaking is less than default change rate threshold value；And when the impedance rate of change is less than default change rate threshold value
When, judge whether the temperature increase is more than preset temperature threshold；And when the temperature increase is more than preset temperature threshold
When value, overheat protector processing is carried out to the loudspeaker by the intelligent power amplifier.
In the above scheme, the judging unit 706 is additionally configured to judge whether the temperature increase is more than default temperature
Spend threshold value；And when the temperature increase is more than preset temperature threshold, it is default to judge whether the impedance rate of change is less than
Change rate threshold value；And when the impedance rate of change is less than default change rate threshold value, pass through the intelligent power amplifier pair
The loudspeaker carries out overheat protector processing.
In the above scheme, the judging unit 706 is additionally configured to be not less than default change rate when the impedance rate of change
When threshold value, using first impedance value as the reference impedance value of the loudspeaker, the impedance to the loudspeaker is continued to execute
The step of being acquired.
In the above scheme, the judging unit 706 is additionally configured to be no more than preset temperature threshold when the temperature increase
When value, the step of being acquired to the impedance of the loudspeaker is continued to execute.
In the above scheme, the over-temperature protection unit 705, concrete configuration are when the impedance rate of change is less than default become
When rate threshold value and the temperature increase are more than preset temperature threshold, control intelligent power amplifier output the first control letter
Number；Wherein, the first control signal stops playing music for controlling the loudspeaker；And when the second of the loudspeaker
When impedance value is less than default impedance threshold, control intelligent power amplifier exports second control signal, continues to execute and raises to described
The step of impedance of sound device is acquired；Wherein, the second control signal continues to play music for controlling the loudspeaker,
Second impedance value is to be acquired during stopping and playing music to the impedance of the loudspeaker.
In the above scheme, the acquisition unit 701, concrete configuration are to acquire the corresponding voltage value of the loudspeaker and electricity
Flow valuve；
The computing unit 704 is additionally configured to be calculated according to the voltage value and the current value, obtains described raise
First impedance value of sound device.
It is to be appreciated that in the present embodiment, " unit " can be partial circuit, segment processor, subprogram or soft
Part etc., naturally it is also possible to be module, can also be non-modularization.And each component part in the present embodiment can collect
It is physically existed alone at each unit in one processing unit, is also possible to, it can also be integrated with two or more units
In a unit.Above-mentioned integrated unit both can take the form of hardware realization, can also be using software function module
Form is realized.
If the integrated unit realizes that being not intended as independent product is sold in the form of software function module
Or in use, can store in a computer readable storage medium, based on this understanding, the technical side of the present embodiment
Substantially all or part of the part that contributes to existing technology or the technical solution can be produced case in other words with software
The form of product embodies, which is stored in a storage medium, including some instructions are used so that one
Platform computer equipment (can be personal computer, server or the network equipment etc.) or processor (processor) execute sheet
The all or part of the steps of embodiment the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory
(Read Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic or disk
Etc. the various media that can store program code.
Therefore, a kind of computer storage medium is present embodiments provided, which is stored with overheat protector
Program realizes method described in any one of previous embodiment when the overheat protector program is executed by least one processor
Step.
Based on the composition and computer storage medium of above-mentioned over-temperature protection device 70, referring to Fig. 8, it illustrates the application
The specific hardware structure for the over-temperature protection device 70 that embodiment provides may include: network interface 801, memory 802 and processing
Device 803；Various components are coupled by bus system 804.It is understood that bus system 804 for realizing these components it
Between connection communication.Bus system 804 further includes power bus, control bus and status signal in addition to including data/address bus
Bus.But for the sake of clear explanation, various buses are all designated as bus system 804 in fig. 8.Wherein, network interface
801, during for being received and sent messages between other ext nal network elements, signal is sended and received；
Memory 802, for storing the computer program that can be run on processor 803；
Processor 803, for executing when running the computer program:
During loudspeaker plays music, it is acquired by the impedance to the loudspeaker, obtains the loudspeaking
First impedance value of device；
According to the reference impedance value of the loudspeaker and first impedance value, the corresponding impedance of the loudspeaker is determined
Change rate；Wherein, the reference impedance value is to be acquired before playing music to the impedance of the loudspeaker；
Based on determining impedance rate of change, controls intelligent power amplifier and overheat protector processing is carried out to the loudspeaker.
It is appreciated that the memory 802 in the embodiment of the present application can be volatile memory or nonvolatile memory,
It or may include both volatile and non-volatile memories.Wherein, nonvolatile memory can be read-only memory (Read-
Only Memory, ROM), programmable read only memory (Programmable ROM, PROM), the read-only storage of erasable programmable
Device (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or
Flash memory.Volatile memory can be random access memory (Random Access Memory, RAM), be used as external high
Speed caching.By exemplary but be not restricted explanation, the RAM of many forms is available, such as static random access memory
(Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory
(Synchronous DRAM, SDRAM), double data speed synchronous dynamic RAM (Double Data Rate
SDRAM, DDRSDRAM), enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), synchronized links
Dynamic random access memory (Synchlink DRAM, SLDRAM) and direct rambus random access memory (Direct
Rambus RAM, DRRAM).The memory 802 of system and method described herein is intended to include but is not limited to these and arbitrarily its
It is suitble to the memory of type.
And processor 803 may be a kind of IC chip, the processing capacity with signal.During realization, on
Each step for stating method can be completed by the integrated logic circuit of the hardware in processor 803 or the instruction of software form.
Above-mentioned processor 803 can be general processor, digital signal processor (Digital Signal Processor, DSP),
Specific integrated circuit (Application Specific Integrated Circuit, ASIC), ready-made programmable gate array
(Field Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor are patrolled
Collect device, discrete hardware components.It may be implemented or execute disclosed each method, step and the logical box in the embodiment of the present application
Figure.General processor can be microprocessor or the processor is also possible to any conventional processor etc..In conjunction with the application
The step of method disclosed in embodiment, can be embodied directly in hardware decoding processor and execute completion, or use decoding processor
In hardware and software module combination execute completion.Software module can be located at random access memory, and flash memory, read-only memory can
In the storage medium of this fields such as program read-only memory or electrically erasable programmable memory, register maturation.The storage
Medium is located at memory 802, and processor 803 reads the information in memory 802, and the step of the above method is completed in conjunction with its hardware
Suddenly.
It is understood that embodiments described herein can with hardware, software, firmware, middleware, microcode or its
Combination is to realize.For hardware realization, processing unit be may be implemented in one or more specific integrated circuit (Application
Specific Integrated Circuits, ASIC), digital signal processor (Digital Signal Processing,
DSP), digital signal processing appts (DSP Device, DSPD), programmable logic device (Programmable Logic
Device, PLD), field programmable gate array (Field-Programmable Gate Array, FPGA), general processor,
In controller, microcontroller, microprocessor, other electronic units for executing herein described function or combinations thereof.
For software implementations, it can be realized herein by executing the module (such as process, function etc.) of function described herein
The technology.Software code is storable in memory and is executed by processor.Memory can in the processor or
It is realized outside processor.
Optionally, as another embodiment, processor 803 is additionally configured to when running the computer program, is executed
The step of method described in any one of previous embodiment.
Referring to Fig. 9, it illustrates the composed structure schematic diagrames of a kind of electronic equipment 90 provided by the embodiments of the present application.Such as figure
Shown in 9, electronic equipment 90 other than it may include to have loudspeaker 901 and intelligent power amplifier 902, may be used also by electronic equipment 90
To include any one over-temperature protection device 70 involved in previous embodiment.
It should be noted that in this application, the terms "include", "comprise" or its any other variant are intended to non-
It is exclusive to include, so that the process, method, article or the device that include a series of elements not only include those elements,
It but also including other elements that are not explicitly listed, or further include solid by this process, method, article or device
Some elements.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including
There is also other identical elements in the process, method of the element, article or device.
Above-mentioned the embodiment of the present application serial number is for illustration only, does not represent the advantages or disadvantages of the embodiments.
Disclosed method in several embodiments of the method provided herein, in the absence of conflict can be any group
It closes, obtains new embodiment of the method.
Disclosed feature in several product embodiments provided herein, in the absence of conflict can be any group
It closes, obtains new product embodiments.
Disclosed feature in several methods provided herein or apparatus embodiments, in the absence of conflict can be with
Any combination obtains new embodiment of the method or apparatus embodiments.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Those familiar with the art within the technical scope of the present application, can easily think of the change or the replacement, and should all contain
Lid is within the scope of protection of this application.Therefore, the protection scope of the application should be based on the protection scope of the described claims.
Claims (13)
1. a kind of excess temperature protection method, which is characterized in that the described method includes:
During loudspeaker plays music, it is acquired by the impedance to the loudspeaker, obtains the loudspeaker
First impedance value；
According to the reference impedance value of the loudspeaker and first impedance value, the corresponding impedance variations of the loudspeaker are determined
Rate；Wherein, the reference impedance value is to be acquired before playing music to the impedance of the loudspeaker；
Based on determining impedance rate of change, controls intelligent power amplifier and overheat protector processing is carried out to the loudspeaker.
2. the method according to claim 1, wherein controlling intelligent power based on determining impedance rate of change
Before amplifier carries out overheat protector processing to the loudspeaker, the method also includes:
Reference impedance value and first impedance value to the loudspeaker carry out difference calculating, obtain impedance value added；
Based on the calculated relationship between the impedance and temperature obtained in advance, determine that the corresponding temperature of the impedance value added increases
Value.
3. according to the method described in claim 2, it is characterized in that, described based on determining impedance rate of change, the intelligent function of control
Rate amplifier carries out overheat protector processing to the loudspeaker, comprising:
When the impedance rate of change is less than default change rate threshold value and the temperature increase is more than preset temperature threshold, pass through
The intelligent power amplifier carries out overheat protector processing to the loudspeaker.
4. according to the method described in claim 3, it is characterized in that, described when the impedance rate of change is less than default change rate threshold
Value and the temperature increase be more than preset temperature threshold when, the loudspeaker was carried out by the intelligent power amplifier
Warm protection processing, comprising:
Judge whether the impedance rate of change is less than default change rate threshold value；
When the impedance rate of change is less than default change rate threshold value, judge whether the temperature increase is more than preset temperature threshold
Value；
When the temperature increase is more than preset temperature threshold, the loudspeaker is carried out by the intelligent power amplifier
Overheat protector processing.
5. according to the method described in claim 3, it is characterized in that, described when the impedance rate of change is less than default change rate threshold
Value and the temperature increase be more than preset temperature threshold when, the loudspeaker was carried out by the intelligent power amplifier
Warm protection processing, comprising:
Judge whether the temperature increase is more than preset temperature threshold；
When the temperature increase is more than preset temperature threshold, judge whether the impedance rate of change is less than default change rate threshold
Value；
When the impedance rate of change is less than default change rate threshold value, by the intelligent power amplifier to the loudspeaker into
The processing of row overheat protector.
6. method according to claim 4 or 5, which is characterized in that judging it is default whether the impedance rate of change is less than
After change rate threshold value, the method also includes:
When the impedance rate of change is not less than default change rate threshold value, using first impedance value as the base of the loudspeaker
Quasi- impedance value continues to execute the step of being acquired to the impedance of the loudspeaker.
7. method according to claim 4 or 5, which is characterized in that judge the temperature increase whether be more than
After preset temperature threshold, the method also includes:
When the temperature increase is no more than preset temperature threshold, continues to execute and the impedance of the loudspeaker is acquired
Step.
8. according to the method described in claim 3, it is characterized in that, described based on determining impedance rate of change, the intelligent function of control
Rate amplifier carries out overheat protector processing to the loudspeaker, comprising:
When the impedance rate of change is less than default change rate threshold value and the temperature increase is more than preset temperature threshold, control
Intelligent power amplifier exports first control signal；Wherein, the first control signal is broadcast for controlling the loudspeaker stopping
It puts the music on；
When the second impedance value of the loudspeaker is less than default impedance threshold, the second control of output of control intelligent power amplifier
Signal continues to execute the step of being acquired to the impedance of the loudspeaker；Wherein, the second control signal is for controlling institute
It states loudspeaker to continue to play music, second impedance value is impedance during stopping playing music to the loudspeaker
It is acquired.
9. the method according to claim 1, wherein the impedance by the loudspeaker is acquired,
Obtain the first impedance value of the loudspeaker, comprising:
Acquire the corresponding voltage value of the loudspeaker and current value；
It is calculated according to the voltage value and the current value, obtains the first impedance value of the loudspeaker.
10. a kind of over-temperature protection device, which is characterized in that the over-temperature protection device includes: acquisition unit, determination unit and control
Unit processed；Wherein,
The acquisition unit is configured to adopt during loudspeaker plays music by the impedance to the loudspeaker
Collection, obtains the first impedance value of the loudspeaker；
The determination unit, is configured to reference impedance value and first impedance value according to the loudspeaker, determine described in
The corresponding impedance rate of change of loudspeaker；Wherein, the reference impedance value is the impedance before playing music to the loudspeaker
It is acquired；
Described control unit, is configured to determining impedance rate of change, control intelligent power amplifier to the loudspeaker into
The processing of row overheat protector.
11. a kind of over-temperature protection device, which is characterized in that the over-temperature protection device includes: memory and processor；Wherein,
The memory, for storing the computer program that can be run on the processor；
The processor, for executing method as described in any one of claim 1 to 9 when running the computer program
The step of.
12. a kind of computer storage medium, which is characterized in that the computer storage medium is stored with overheat protector program, institute
State the step of realizing method as described in any one of claim 1 to 9 when overheat protector program is executed by least one processor.
13. a kind of electronic equipment, which is characterized in that the electronic equipment includes at least loudspeaker, intelligent power amplifier and such as
Over-temperature protection device described in claim 10 or 11.
Priority Applications (1)
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|---|---|---|---|
| CN201910472192.9A CN110225434B (en) | 2019-05-31 | 2019-05-31 | Over-temperature protection method and device, computer storage medium and electronic equipment |
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| CN201910472192.9A CN110225434B (en) | 2019-05-31 | 2019-05-31 | Over-temperature protection method and device, computer storage medium and electronic equipment |
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| CN110225434B CN110225434B (en) | 2021-01-12 |
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| CN113163305A (en) * | 2020-01-07 | 2021-07-23 | 青岛海信移动通信技术股份有限公司 | Audio playing terminal and protection method of loudspeaker thereof |
| CN113518287A (en) * | 2021-07-14 | 2021-10-19 | 歌尔光学科技有限公司 | Method for adjusting device state, terminal device and computer readable storage medium |
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| CN110225434B (en) | 2021-01-12 |
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