CN113810826A - Multi-threshold temperature protection circuit, method, protection device and electronic equipment - Google Patents
Multi-threshold temperature protection circuit, method, protection device and electronic equipment Download PDFInfo
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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
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
Abstract
The invention provides a multi-threshold temperature protection circuit, a multi-threshold temperature protection method, a multi-threshold temperature protection device and electronic equipment.
Description
Technical Field
The invention relates to the technical field of audio control, in particular to a multi-threshold temperature protection circuit, a multi-threshold temperature protection method, a multi-threshold temperature protection device and electronic equipment.
Background
With the continuous development of scientific technology, various terminals are equipped with audio devices, and for the audio devices (speakers/loudspeakers), customers want to make the speakers/loudspeakers output more power as much as possible on the premise of ensuring the service lives of the speakers/loudspeakers so as to enhance the loudness and listening feeling of sound.
However, the temperature of the speaker/horn after long-term operation is an important factor affecting the service life of the speaker/horn, and if the temperature exceeds the maximum temperature established by the manufacturer, the speaker/horn is easily burned out, so that it is a high demand in the current audio market to control the operating temperature of the speaker/horn and keep the output power of the speaker/horn as high as possible.
Disclosure of Invention
In view of the above, the present invention provides a multi-threshold temperature protection circuit, a method, a protection device and an electronic device to achieve a higher power output when the working temperature of the speaker does not exceed the maximum working temperature.
The technical scheme of the invention is as follows:
a multi-threshold temperature protection circuit for controlling an operating temperature of a speaker, the multi-threshold temperature protection circuit comprising: the temperature real-time calculation module, the multi-threshold temperature protection control module and the signal adjustment module;
the detection end of the temperature real-time calculation module is connected with the signal input end of a loudspeaker, the output end of the temperature real-time calculation module is connected with the input end of the multi-threshold temperature protection control module, and the temperature real-time calculation module is used for calculating the real-time working temperature of the loudspeaker;
the output end of the multi-threshold temperature protection control module is connected with the input end of the signal adjusting module, and the multi-threshold temperature protection control module is used for outputting gain signals corresponding to the real-time working temperature under different temperature thresholds according to the real-time working temperature;
the signal adjusting module is used for generating a target audio input signal according to the audio input signal and the gain signal corresponding to the real-time working temperature under different temperature thresholds and transmitting the target audio input signal to the loudspeaker so as to control the temperature of the loudspeaker in the working state.
Preferably, in the multi-threshold temperature protection circuit, the multi-threshold temperature protection circuit further includes: a current detection device;
the loudspeaker comprises a first input end and a second input end;
the first output end of the signal adjusting module is connected with the first input end of the loudspeaker;
a second output end of the signal adjusting module is connected with a second input end of the loudspeaker through the current detection device;
the first detection end and the second detection end of the temperature real-time calculation module are respectively connected with two ends of the current detection device and are used for detecting the current flowing through the loudspeaker;
the third detection end of the temperature real-time calculation module is connected with the first input end of the loudspeaker, and the fourth detection end of the temperature real-time calculation module is connected with the second input end of the loudspeaker and is used for detecting the voltage at the two ends of the loudspeaker;
the temperature real-time calculation module is used for calculating real-time direct current impedance of the loudspeaker according to the current of the loudspeaker and the voltage of the loudspeaker;
the temperature real-time calculation module is further used for calculating reference direct-current impedance of the loudspeaker at a reference temperature, and obtaining real-time working temperature of the loudspeaker according to the real-time direct-current impedance and the reference direct-current impedance.
Preferably, in the multi-threshold temperature protection circuit, the multi-threshold temperature protection control module includes: a first gain signal control unit;
the first gain signal control unit is used for determining a gain value of the gain signal when the real-time working temperature is lower than a first preset temperature; when the gain value of the gain signal is 0dB, controlling the gain value of the gain signal to be kept unchanged; and when the gain value of the gain signal is smaller than 0dB, controlling to increase the gain value of the gain signal every other first preset time until the gain value is 0 dB.
Preferably, in the multi-threshold temperature protection circuit, the multi-threshold temperature protection control module further includes: a second gain signal control unit;
the second gain signal control unit is used for acquiring the average slope of the real-time working temperature within a second preset time when the real-time working temperature is greater than a first preset temperature and less than a second preset temperature; when the average slope is larger than or equal to a first preset slope, reducing the gain value of the gain signal; when the average slope is smaller than the first preset slope and the gain value of the gain signal is 0dB, controlling the gain value of the gain signal to be kept unchanged; and when the average slope is smaller than the first preset slope and the gain value of the gain signal is not 0dB, controlling to increase the gain value of the gain signal every second preset time.
Preferably, in the multi-threshold temperature protection circuit, the multi-threshold temperature protection control module further includes: a third gain signal control unit;
the third gain signal control unit is used for acquiring the average slope of the real-time working temperature within a third preset time when the real-time working temperature is greater than a second preset temperature and less than a third preset temperature; when the average slope is larger than or equal to a second preset slope, reducing the gain value of the gain signal; and when the average slope is smaller than the second preset slope, controlling the gain value of the gain signal to be kept unchanged.
Preferably, in the multi-threshold temperature protection circuit, the multi-threshold temperature protection control module further includes: a fourth gain signal control unit;
and the fourth gain signal control unit is used for reducing the gain value of the gain signal when the real-time working temperature is higher than a third preset temperature until the real-time working temperature is lower than the third preset temperature.
A multi-threshold temperature protection method for controlling an operating temperature of a speaker, the multi-threshold temperature protection method comprising:
acquiring the real-time working temperature of a loudspeaker;
outputting gain signals corresponding to the real-time working temperature under different temperature thresholds according to the real-time working temperature;
and generating a target audio input signal according to the audio input signal to be input to the loudspeaker and the gain signal corresponding to the real-time working temperature under different temperature thresholds, and transmitting the target audio input signal to the loudspeaker so as to control the temperature of the loudspeaker in the working state.
Preferably, in the multi-threshold temperature protection method, the generating a target audio input signal includes:
multiplying the audio input signal by the gain signal to generate the target audio input signal.
Preferably, in the multi-threshold temperature protection method, outputting the gain signals corresponding to the real-time operating temperature under different temperature thresholds according to the real-time operating temperature includes
When the real-time working temperature is lower than a first preset temperature, determining a gain value of the gain signal;
when the gain value of the gain signal is 0dB, the gain value of the gain signal is kept unchanged;
and when the gain value of the gain signal is less than 0dB, increasing the gain value of the gain signal every other first preset time until the gain value is 0 dB.
Preferably, in the multi-threshold temperature protection method, the method further includes outputting a gain signal corresponding to the real-time operating temperature under different temperature thresholds according to the real-time operating temperature, and the method further includes
When the real-time working temperature is higher than a first preset temperature and lower than a second preset temperature, acquiring the average slope of the real-time working temperature within a second preset time;
when the average slope is larger than or equal to a first preset slope, reducing the gain value of the gain signal;
when the average slope is smaller than the first preset slope and the gain value of the gain signal is 0dB, the gain value of the gain signal is kept unchanged;
and when the average slope is smaller than the first preset slope and the gain value of the gain signal is not 0dB, increasing the gain value of the gain signal every other second preset time.
Preferably, in the multi-threshold temperature protection method, the method further includes outputting a gain signal corresponding to the real-time operating temperature under different temperature thresholds according to the real-time operating temperature, and the method further includes
When the real-time working temperature is higher than a second preset temperature and lower than a third preset temperature, acquiring the average slope of the real-time working temperature within a third preset time;
when the average slope is larger than or equal to a second preset slope, reducing the gain value of the gain signal;
when the average slope is smaller than the second preset slope, the gain value of the gain signal is kept unchanged;
judging whether the real-time working temperature is greater than a third preset temperature or not;
and if so, reducing the gain value of the gain signal until the real-time working temperature is lower than the third preset temperature.
A protection device comprising a processor and a memory;
the memory is used for storing preset control instructions and storing data generated in the running process of the processor;
the processor is used for reading the control instruction stored in the memory and executing the multi-threshold temperature protection method.
An electronic device comprising a speaker and the multi-threshold temperature protection circuit of any of the above, the multi-threshold temperature protection circuit for controlling an operating temperature of the speaker;
or the like, or, alternatively,
the electronic equipment comprises a loudspeaker and the protection device, wherein the protection device is used for controlling the working temperature of the loudspeaker.
Compared with the prior art, the invention has the following beneficial effects:
according to the multi-threshold temperature protection circuit provided by the invention, the real-time working temperature of the loudspeaker is detected in real time, the gain signals corresponding to the real-time working temperature under different temperature thresholds are output, the audio input signal is adjusted in real time, and the target audio input signal is generated and transmitted to the loudspeaker, so that the situation that the loudspeaker does not exceed the maximum working temperature is ensured, and the output of higher power is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a multi-threshold temperature protection circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a multi-threshold temperature protection circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a control waveform of a multi-threshold temperature protection control module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another temperature stable protection circuit according to an embodiment of the present invention;
fig. 5 is a schematic flowchart of a multi-threshold temperature protection method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Because the coil of the loudspeaker/horn heats quickly and dissipates slowly, and the generated heat has a certain hysteresis compared with the energy of the audio input signal, when the working temperature of the loudspeaker/horn is found to exceed the specified maximum temperature quickly, if the adjustment amplitude of the temperature control algorithm for adjusting the gain is not large and the speed is not high, the temperature of the loudspeaker/horn is in danger of exceeding the specified maximum temperature for a short time; if the adjustment amplitude of the adjustment gain of the temperature control algorithm is large and the speed is high, the sound emitted by the loudspeaker/horn has a suddenly reduced hearing feeling, so that the market demand cannot be met.
Based on the above problem, this application technical scheme is used and is given birth to, and this technical scheme is simple, can not produce great calculated amount, under the prerequisite of guaranteeing the normal life of speaker/loudspeaker, can let speaker/loudspeaker be as far as with great power output to, when adjusting audio input signal, can not produce big gain sudden change, and then can not appear the listening sense problem that speaker/loudspeaker sound is suddenly big or suddenly little.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a multi-threshold temperature protection circuit according to an embodiment of the present invention.
The multi-threshold temperature protection circuit is used for controlling the working temperature of a loudspeaker and comprises: the temperature real-time calculation module 12, the multi-threshold temperature protection control module 13 and the signal adjustment module 14;
the detection end of the temperature real-time calculation module 12 is connected with the signal input end of the loudspeaker 11, the output end of the temperature real-time calculation module 12 is connected with the input end of the multi-threshold temperature protection control module 13, and the temperature real-time calculation module 12 is used for calculating the real-time working temperature of the loudspeaker;
the output end of the multi-threshold temperature protection control module 13 is connected with the input end of the signal adjusting module 14, and the multi-threshold temperature protection control module 13 is configured to output the Gain signals Gain corresponding to the real-time working temperature at different temperature thresholds according to the real-time working temperature;
the signal adjusting module 14 is configured to generate a target audio input signal according to the audio input signal Din and the Gain signal Gain corresponding to the real-time working temperature under different temperature thresholds, and transmit the target audio input signal to the speaker 11, so as to control the temperature of the speaker 11 in the working state.
In the embodiment, in order to prevent the loudspeaker from being burnt out due to overhigh temperature of the loudspeaker, the working temperature of the loudspeaker is detected in real time, and the size of the audio input signal transmitted to the loudspeaker is dynamically adjusted through the detected real-time working temperature, so that the working temperature of the loudspeaker does not exceed the specified maximum temperature, the protection of the loudspeaker is realized, and the output of higher power can be realized.
Specifically, the multi-threshold temperature protection circuit 13 detects the real-time working temperature of the speaker in real time, generates the corresponding Gain signal Gain according to different real-time working temperatures and different threshold ranges, adjusts the audio input signal Din in real time, and further generates a target audio input signal to be transmitted to the speaker, so as to ensure that the speaker realizes high power output without exceeding the maximum working temperature.
Referring to fig. 2, fig. 2 is a schematic diagram of a specific structure of a multi-threshold temperature protection circuit according to an embodiment of the present invention.
The multi-threshold temperature protection circuit further comprises: a current detection device 15;
the loudspeaker 11 comprises a first input end and a second input end;
a first output end of the signal adjusting module 14 is connected with a first input end of the loudspeaker 11;
a second output end of the signal adjusting module 14 is connected to a second input end of the speaker 11 through the current detecting device 15;
the first detection end and the second detection end of the temperature real-time calculation module 12 are respectively connected with two ends of the current detection device 15, and are used for detecting the current flowing through the loudspeaker 11;
the third detection end of the temperature real-time calculation module 12 is connected to the first input end of the speaker 11, and the fourth detection end of the temperature real-time calculation module 12 is connected to the second input end of the speaker 11, and is configured to detect voltages at two ends of the speaker 11;
the temperature real-time calculation module 12 is configured to calculate a real-time dc impedance of the speaker 11 according to the current of the speaker 11 and the voltage of the speaker 11;
the temperature real-time calculation module 12 is further configured to calculate a reference dc impedance of the speaker 11 at a reference temperature, and obtain a real-time working temperature of the speaker 11 according to the real-time dc impedance and the reference dc impedance.
In this embodiment, by disposing a current detection device 15 in series at a corresponding position in the temperature protection circuit line, including but not limited to a resistor R, taking the resistor R as an example for explanation, since the current flowing through the current detection device 15 is the same as the current flowing through the speaker 11, the current flowing through the current detection device 15, that is, the current flowing through the speaker 11 can be calculated by detecting the voltage across the resistor R.
The two ends of the loudspeaker 11 are provided with voltage detection points, the voltage of the loudspeaker 11 can be detected through the temperature real-time calculation module 12, and the real-time direct current impedance of the loudspeaker 11 can be calculated in real time through the voltage and current data of the loudspeaker 11.
Because the coil of the speaker 11 is generally made of a characteristic alloy material, the temperature rise coefficient is relatively fixed, and the real-time working temperature of the speaker 11 can be calculated through the calculated real-time direct-current impedance and the reference direct-current impedance of the speaker 11 at the reference temperature, and the specific calculation mode is as follows:
wherein, T0Representing the reference temperature, is typically set at 25 ℃.
R0Represents T0The following reference dc impedance.
α represents a temperature rise coefficient of the speaker coil.
ReRepresenting the real-time dc impedance.
T represents the real-time operating temperature.
Further, according to the above embodiment of the present invention, the signal adjusting module 14 is a multiplier.
In this embodiment, the multi-threshold temperature protection control module 13 adjusts the Gain value of the Gain signal Gain according to the real-time working temperature received in real time, and the Gain value is multiplied by the audio input signal Din to adjust the amplitude of the audio input signal Din in real time, so as to generate a target audio input signal and transmit the target audio input signal to the speaker, which not only can ensure that the temperature of the speaker 11 does not exceed the specified maximum temperature, but also can ensure that the signal input to the speaker 11 does not change greatly, thereby avoiding the problem of a sudden hearing sensation of the speaker 11.
The following illustrates how to adjust the amplitude of the audio input signal Din to generate the target audio input signal:
assuming that the amplitude of the audio input signal Din is 1, the Gain signal Gain is 0.5, and the amplitude of the target audio input signal after multiplying the two is 0.5, that is, the amplitude of the target audio input signal input to the speaker is 0.5, thereby realizing the adjustment of the amplitude of the audio signal of the speaker.
Further, based on the above embodiments of the present invention, referring to fig. 3, fig. 3 is a schematic diagram of a control waveform of a multi-threshold temperature protection control module according to an embodiment of the present invention.
First, the multi-threshold temperature protection module 13 sets three thresholds, namely a first preset temperature threshold1, a second preset temperature threshold2, and a third preset temperature threshold 3. The control region of the multi-threshold temperature protection module 13 is accordingly divided into A, B, C and D four control regions, wherein the first preset temperature threshold1 is lower than the second preset temperature threshold2 is lower than the third preset temperature threshold 3.
In the embodiment of the present invention, the third preset temperature threshold3 is 5 to 10 degrees lower than the maximum temperature specified by the speaker 11 (it should be noted that the range may be determined according to different speaker heating conditions), and it is ensured that the highest point of the temperature curve does not exceed the maximum temperature specified by the speaker 11, so as to leave a sufficient temperature margin.
Referring to fig. 4, fig. 4 is a schematic diagram of another specific structure of a temperature stable protection circuit according to an embodiment of the present invention.
The multi-threshold temperature protection control module 13 includes: a first gain signal control unit 41;
the first Gain signal control unit 41 is configured to determine a Gain value of the Gain signal Gain when the real-time operating temperature is less than a first preset temperature threshold 1; when the Gain value of the Gain signal Gain is 0dB, controlling the Gain value of the Gain signal Gain to be kept unchanged; and when the Gain value of the Gain signal Gain is smaller than 0dB, controlling to increase the Gain value of the Gain signal Gain every other first preset time Dtime until the Gain value is 0 dB.
In this embodiment, when the speaker 11 starts to operate, the temperature curve is in the D region, and the gain value increased every first preset time Dtime is the same, and the above process is repeated until the temperature curve leaves the D region and enters the C region.
Further, based on the above-mentioned embodiment of the present invention, as shown in fig. 4, in another embodiment of the present invention, the multi-threshold temperature protection control module 13 includes: a second gain signal control unit 42;
the second gain signal control unit 42 is configured to obtain an average slope of the real-time operating temperature within a second preset time Ctime when the real-time operating temperature is greater than a first preset temperature threshold1 and less than a second preset temperature threshold 2; when the average slope is larger than or equal to a first preset slope, reducing the Gain value of the Gain signal Gain; when the average slope is smaller than the first preset slope and the Gain value of the Gain signal Gain is 0dB, controlling the Gain value of the Gain signal Gain to be kept unchanged; and when the average slope is smaller than the first preset slope and the Gain value of the Gain signal Gain is not 0dB, controlling the Gain value of the Gain signal Gain to be increased every other second preset time Ctime.
In this embodiment, the temperature region is in the region C, and when the average slope of the temperature curve within the second preset time Ctime is greater than or equal to a first preset slope (the first preset slope may be adjusted, and is generally a larger positive number, because there is a large enough margin between the temperature of the region C and the maximum temperature of the speaker, the suppression is only required when the temperature curve rises quickly, otherwise, the speaker does not output a larger output power), the Gain value of the Gain signal Gain is reduced, and the specific range of the reduced Gain value may be determined according to specific situations.
And then, when the temperature curve is still in the C area, repeating the three processes at intervals of a second preset time Ctime until the temperature curve falls into the D area or enters the B area.
Further, based on the above-mentioned embodiment of the present invention, as shown in fig. 4, in another embodiment of the present invention, the multi-threshold temperature protection control module 13 includes: a third gain signal control unit 43;
the third gain signal control unit 43 is configured to obtain an average slope of the real-time operating temperature within a third preset time Btime when the real-time operating temperature is greater than a second preset temperature threshold2 and less than a third preset temperature threshold 3; when the average slope is larger than or equal to a second preset slope, reducing the Gain value of the Gain signal Gain; and when the average slope is smaller than the second preset slope, controlling the Gain value of the Gain signal Gain to be kept unchanged.
In this embodiment, when the average slope of the temperature curve within the third preset time Btime is greater than or equal to a second preset slope (the second preset slope can be adjusted, and generally the second preset slope is smaller than the first preset slope, because the temperature of the B region is near the maximum temperature of the speaker, the triggering condition for suppressing the Gain is more sensitive than the triggering condition of the C region), the Gain value of the Gain signal Gain is decreased, and the specific range of the decreased Gain value may be determined according to specific situations.
And then, when the temperature curve is still in the B area, repeating the process every other third preset time Btime until the temperature curve falls into the C area or enters the A area, and ending.
Further, based on the above-mentioned embodiment of the present invention, as shown in fig. 4, in another embodiment of the present invention, the multi-threshold temperature protection control module 13 includes: a fourth gain signal control unit 44;
the fourth Gain signal control unit 44 is configured to decrease the Gain value of the Gain signal Gain when the real-time operating temperature is greater than a third preset temperature threshold3, until the real-time operating temperature is less than the third preset temperature threshold 3.
In this embodiment, the temperature curve is in the B region, and the preset gain value is decreased every fourth preset time Atime until the temperature curve falls into the B region.
As can be seen from the above description and with reference to fig. 3, after the speaker 11 starts to operate normally, if the real-time operating temperature of the speaker 11 does not rise fast, the pressing instruction of the multi-threshold temperature protection module 13 is only triggered in the area a, so that the real-time operating temperature of the speaker 11 is not higher than the specified maximum operating temperature, and the real-time operating temperature of the speaker 11 is also ensured to be within a higher acceptable temperature range as much as possible, so as to ensure that the speaker realizes higher power output, and meet market requirements.
If the real-time working temperature of the loudspeaker 11 rises quickly, the pressing instruction of the multi-threshold temperature protection module 13 is triggered in advance in the region C and the region B, so that the real-time working temperature of the loudspeaker cannot exceed the specified maximum working temperature, and the hearing of the loudspeaker can be slowly reduced by adjusting the second preset time, the third preset time and the adjusted gain value, and the hearing of suddenly reduced sound cannot occur.
And when the temperature curve falls from a higher temperature, the gain is kept in the B area, the corresponding gain value is increased in the C area at intervals of a second preset time, the corresponding gain value is increased in the D area at intervals of a first preset time, and the hearing sense that the sound is suddenly increased can be ensured not to occur by adjusting the size of the parameters.
That is to say, in the process of adjusting the Gain value of the Gain signal Gain, large Gain jump will not occur, and then the problem of listening sensation that the sound of the speaker/horn is suddenly changed will not occur.
It should be noted that, in the embodiment of the present invention, the multi-threshold temperature protection control module 13 may include one or more of a first gain signal control unit 41, a second gain signal control unit 42, a third gain signal control unit 43, and a fourth gain signal control unit 44. The first preset temperature threshold1 is lower than the second preset temperature threshold2 and lower than the third preset temperature threshold 3.
Based on all the above embodiments of the present invention, in another embodiment of the present invention, a multi-threshold temperature protection method is further provided for controlling the working temperature of the speaker, referring to fig. 5, and fig. 5 is a schematic flow chart of the multi-threshold temperature protection method provided in the embodiment of the present invention.
The temperature protection method comprises the following steps:
s101: acquiring the real-time working temperature of a loudspeaker;
s102: outputting gain signals corresponding to the real-time working temperature under different temperature thresholds according to the real-time working temperature;
s103: and generating a target audio input signal according to the audio input signal to be input to the loudspeaker and the gain signal corresponding to the real-time working temperature under different temperature thresholds, and transmitting the target audio input signal to the loudspeaker so as to control the temperature of the loudspeaker in the working state.
Wherein the generating a target audio input signal comprises:
multiplying the audio input signal by the gain signal to generate the target audio input signal.
In this embodiment, the real-time working temperature of the speaker is detected in real time, the gain signals corresponding to the real-time working temperature under different temperature thresholds are output, the audio input signal is adjusted in real time, a target audio input signal is generated and transmitted to the speaker, so that the situation that the speaker does not exceed the maximum working temperature is ensured, and the output of higher power is realized.
Further, based on the above embodiment of the present invention, the outputting the gain signal corresponding to the real-time operating temperature under different temperature thresholds according to the real-time operating temperature includes:
when the real-time working temperature is lower than a first preset temperature, determining a gain value of the gain signal;
when the gain value of the gain signal is 0dB, the gain value of the gain signal is kept unchanged;
and when the gain value of the gain signal is less than 0dB, increasing the gain value of the gain signal every other first preset time until the gain value is 0 dB.
Further, based on the above embodiment of the present invention, the outputting, according to the real-time operating temperature, the gain signal corresponding to the real-time operating temperature under different temperature thresholds further includes:
when the real-time working temperature is higher than a first preset temperature and lower than a second preset temperature, acquiring the average slope of the real-time working temperature within a second preset time;
when the average slope is larger than or equal to a first preset slope, reducing the gain value of the gain signal;
when the average slope is smaller than the first preset slope and the gain value of the gain signal is 0dB, the gain value of the gain signal is kept unchanged;
and when the average slope is smaller than the first preset slope and the gain value of the gain signal is not 0dB, increasing the gain value of the gain signal every other second preset time.
Further, based on the above embodiment of the present invention, the outputting, according to the real-time operating temperature, the gain signal corresponding to the real-time operating temperature under different temperature thresholds further includes:
when the real-time working temperature is higher than a second preset temperature and lower than a third preset temperature, acquiring the average slope of the real-time working temperature within a third preset time;
when the average slope is larger than or equal to a second preset slope, reducing the gain value of the gain signal;
when the average slope is smaller than the second preset slope, the gain value of the gain signal is kept unchanged;
judging whether the real-time working temperature is greater than a third preset temperature or not;
and if so, reducing the gain value of the gain signal until the real-time working temperature is lower than the third preset temperature.
It should be noted that the principle of the multi-threshold temperature protection method provided by this embodiment of the present invention is the same as that of the multi-threshold temperature protection circuit provided by the above embodiment, and details are not repeated herein.
Based on all the above embodiments of the present invention, in another embodiment of the present invention, there is further provided a protection device, including a processor and a memory;
the memory is used for storing preset control instructions and storing data generated in the running process of the processor;
the processor is used for reading the control instruction stored in the memory and executing the multi-threshold temperature protection method.
Based on all the above embodiments of the present invention, in another embodiment of the present invention, there is further provided an electronic device, including a speaker and the multi-threshold temperature protection circuit described in the above embodiments, where the multi-threshold temperature protection circuit is configured to control an operating temperature of the speaker;
or the like, or, alternatively,
the electronic equipment comprises a loudspeaker and the protection device of the embodiment, and the protection device is used for controlling the working temperature of the loudspeaker.
The multi-threshold temperature protection circuit, the method, the protection device and the electronic device provided by the invention are described in detail, a specific example is applied in the description to explain the principle and the implementation of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include or include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (13)
1. A multi-threshold temperature protection circuit for controlling an operating temperature of a speaker, the multi-threshold temperature protection circuit comprising: the temperature real-time calculation module, the multi-threshold temperature protection control module and the signal adjustment module;
the detection end of the temperature real-time calculation module is connected with the signal input end of a loudspeaker, the output end of the temperature real-time calculation module is connected with the input end of the multi-threshold temperature protection control module, and the temperature real-time calculation module is used for calculating the real-time working temperature of the loudspeaker;
the output end of the multi-threshold temperature protection control module is connected with the input end of the signal adjusting module, and the multi-threshold temperature protection control module is used for outputting gain signals corresponding to the real-time working temperature under different temperature thresholds according to the real-time working temperature;
the signal adjusting module is used for generating a target audio input signal according to the audio input signal and the gain signal corresponding to the real-time working temperature under different temperature thresholds and transmitting the target audio input signal to the loudspeaker so as to control the temperature of the loudspeaker in the working state.
2. The multi-threshold temperature protection circuit of claim 1, further comprising: a current detection device;
the loudspeaker comprises a first input end and a second input end;
the first output end of the signal adjusting module is connected with the first input end of the loudspeaker;
a second output end of the signal adjusting module is connected with a second input end of the loudspeaker through the current detection device;
the first detection end and the second detection end of the temperature real-time calculation module are respectively connected with two ends of the current detection device and are used for detecting the current flowing through the loudspeaker;
the third detection end of the temperature real-time calculation module is connected with the first input end of the loudspeaker, and the fourth detection end of the temperature real-time calculation module is connected with the second input end of the loudspeaker and is used for detecting the voltage at the two ends of the loudspeaker;
the temperature real-time calculation module is used for calculating real-time direct current impedance of the loudspeaker according to the current of the loudspeaker and the voltage of the loudspeaker;
the temperature real-time calculation module is further used for calculating reference direct-current impedance of the loudspeaker at a reference temperature, and obtaining real-time working temperature of the loudspeaker according to the real-time direct-current impedance and the reference direct-current impedance.
3. The multi-threshold temperature protection circuit of claim 1, wherein the multi-threshold temperature protection control module comprises: a first gain signal control unit;
the first gain signal control unit is used for determining a gain value of the gain signal when the real-time working temperature is lower than a first preset temperature; when the gain value of the gain signal is 0dB, controlling the gain value of the gain signal to be kept unchanged; and when the gain value of the gain signal is smaller than 0dB, controlling to increase the gain value of the gain signal every other first preset time until the gain value is 0 dB.
4. The multi-threshold temperature protection circuit of claim 1, wherein the multi-threshold temperature protection control module further comprises: a second gain signal control unit;
the second gain signal control unit is used for acquiring the average slope of the real-time working temperature within a second preset time when the real-time working temperature is greater than a first preset temperature and less than a second preset temperature; when the average slope is larger than or equal to a first preset slope, reducing the gain value of the gain signal; when the average slope is smaller than the first preset slope and the gain value of the gain signal is 0dB, controlling the gain value of the gain signal to be kept unchanged; and when the average slope is smaller than the first preset slope and the gain value of the gain signal is not 0dB, controlling to increase the gain value of the gain signal every second preset time.
5. The multi-threshold temperature protection circuit of claim 1, wherein the multi-threshold temperature protection control module further comprises: a third gain signal control unit;
the third gain signal control unit is used for acquiring the average slope of the real-time working temperature within a third preset time when the real-time working temperature is greater than a second preset temperature and less than a third preset temperature; when the average slope is larger than or equal to a second preset slope, reducing the gain value of the gain signal; and when the average slope is smaller than the second preset slope, controlling the gain value of the gain signal to be kept unchanged.
6. The multi-threshold temperature protection circuit of claim 1, wherein the multi-threshold temperature protection control module further comprises: a fourth gain signal control unit;
and the fourth gain signal control unit is used for reducing the gain value of the gain signal when the real-time working temperature is higher than a third preset temperature until the real-time working temperature is lower than the third preset temperature.
7. A multi-threshold temperature protection method for controlling an operating temperature of a speaker, the multi-threshold temperature protection method comprising:
acquiring the real-time working temperature of a loudspeaker;
outputting gain signals corresponding to the real-time working temperature under different temperature thresholds according to the real-time working temperature;
and generating a target audio input signal according to the audio input signal to be input to the loudspeaker and the gain signal corresponding to the real-time working temperature under different temperature thresholds, and transmitting the target audio input signal to the loudspeaker so as to control the temperature of the loudspeaker in the working state.
8. The multi-threshold temperature protection method of claim 7, wherein the generating a target audio input signal comprises:
multiplying the audio input signal by the gain signal to generate the target audio input signal.
9. The multi-threshold temperature protection method according to claim 7, wherein outputting the gain signals corresponding to the real-time operating temperature under different temperature thresholds according to the real-time operating temperature comprises
When the real-time working temperature is lower than a first preset temperature, determining a gain value of the gain signal;
when the gain value of the gain signal is 0dB, the gain value of the gain signal is kept unchanged;
and when the gain value of the gain signal is less than 0dB, increasing the gain value of the gain signal every other first preset time until the gain value is 0 dB.
10. The multi-threshold temperature protection method according to claim 7, wherein the gain signals corresponding to the real-time operating temperature under different temperature thresholds are output according to the real-time operating temperature, further comprising
When the real-time working temperature is higher than a first preset temperature and lower than a second preset temperature, acquiring the average slope of the real-time working temperature within a second preset time;
when the average slope is larger than or equal to a first preset slope, reducing the gain value of the gain signal;
when the average slope is smaller than the first preset slope and the gain value of the gain signal is 0dB, the gain value of the gain signal is kept unchanged;
and when the average slope is smaller than the first preset slope and the gain value of the gain signal is not 0dB, increasing the gain value of the gain signal every other second preset time.
11. The multi-threshold temperature protection method according to claim 7, wherein the gain signals corresponding to the real-time operating temperature under different temperature thresholds are output according to the real-time operating temperature, further comprising
When the real-time working temperature is higher than a second preset temperature and lower than a third preset temperature, acquiring the average slope of the real-time working temperature within a third preset time;
when the average slope is larger than or equal to a second preset slope, reducing the gain value of the gain signal;
when the average slope is smaller than the second preset slope, the gain value of the gain signal is kept unchanged;
judging whether the real-time working temperature is greater than a third preset temperature or not;
and if so, reducing the gain value of the gain signal until the real-time working temperature is lower than the third preset temperature.
12. A protection device, comprising a processor and a memory;
the memory is used for storing preset control instructions and storing data generated in the running process of the processor;
the processor is configured to read the control instructions stored in the memory and execute the multi-threshold temperature protection method of any one of claims 7-11.
13. An electronic device, wherein the electronic device comprises a speaker and the multi-threshold temperature protection circuit of any of claims 1-6, wherein the multi-threshold temperature protection circuit is configured to control an operating temperature of the speaker;
or the like, or, alternatively,
the electronic device comprising a loudspeaker and a protection device as claimed in claim 12 for controlling the operating temperature of the loudspeaker.
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