CN116320897A - High-pitch unit temperature protection method of coaxial loudspeaker and related equipment - Google Patents
High-pitch unit temperature protection method of coaxial loudspeaker and related equipment Download PDFInfo
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- CN116320897A CN116320897A CN202310354033.5A CN202310354033A CN116320897A CN 116320897 A CN116320897 A CN 116320897A CN 202310354033 A CN202310354033 A CN 202310354033A CN 116320897 A CN116320897 A CN 116320897A
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Abstract
The embodiment of the invention provides a high-pitch unit temperature protection method and related equipment of a coaxial loudspeaker, wherein the coaxial loudspeaker comprises a high-pitch unit and a low-pitch unit, and the method comprises the following steps: acquiring a first real-time temperature of a bass unit; the first real-time temperature and the preprocessed input signal are jointly subjected to predictive calculation through a high-pitch unit temperature predictive algorithm, and a second real-time temperature of the high-pitch unit in the current state is obtained through prediction; wherein the preprocessing input signal is a signal obtained by processing an audio input signal through an audio effect algorithm; and processing the second real-time temperature and the preprocessed input signal together through a high-pitch unit temperature protection algorithm to judge whether the second real-time temperature of the high-pitch unit is greater than a preset temperature threshold value, and if so, performing power suppression on the preprocessed input signal. Compared with the related art, the high-pitch unit temperature protection method and the related equipment for the coaxial loudspeaker can better protect the high-pitch unit temperature and have better reliability.
Description
[ field of technology ]
The invention relates to the technical field of speakers, in particular to a high-pitch unit temperature protection method of a coaxial speaker and related equipment.
[ background Art ]
The loudspeaker is an indispensable component of the mobile terminal, and particularly the coaxial loudspeaker is a novel high-end loudspeaker which is recently appeared in the consumer electronics field, and two loudspeaker units (comprising a bass unit for generating low frequency and a treble unit for generating medium and high frequency) are integrated into a whole structure through structural design; the current corresponding driving scheme is: as shown in fig. 1, a capacitor is connected in series with the input end of the high-pitch unit, the capacitor is connected with the whole high-pitch unit and the low-pitch unit in parallel, and finally the capacitor is connected to the output end of the intelligent power amplifier. In the working process of the loudspeaker, if the input is too large (voltage peak value, power and the like), the risks of over-amplitude, over-temperature and the like exist, abnormal sound can be generated under partial conditions, and devices can be damaged under serious conditions; as an important ring of speaker protection, temperature protection can adjust input signals through a protection algorithm when the temperature of the speaker is too high, so that the speaker is not damaged due to the too high temperature.
However, in the prior art, the temperature detection method of the loudspeaker is to superimpose a small low-frequency signal (for example, 15 Hz) on the input signal, calculate the direct flow resistance through the low-frequency response, and then calculate the real-time temperature of the voice coil through the temperature model. For the low-frequency detection signal, the branch circuit where the high-frequency unit is located is approximately disconnected due to the existence of the capacitor, and the resistance of the low-frequency unit is detected, so that the temperature of the low-frequency unit can be obtained. The protection method of the high-temperature unit is that the input audio signal is processed by the sound effect algorithm and then is input into the high-sound unit temperature protection algorithm for processing, the high-sound unit temperature protection algorithm performs calculation and analysis according to the received signal, and if the loudspeaker is judged to have the risk of overhigh temperature under the current input, the input audio signal is processed by the high-sound unit temperature protection algorithm and then is input into the loudspeaker; if the related risk does not exist, the input audio signal is not processed generally and is directly input to a loudspeaker; the risk is mainly that feedback correction cannot be performed on the real-time temperature, namely, a feedback link does not exist, and the prediction accuracy is limited.
Therefore, there is a need to provide a new method for protecting the temperature of a high-pitched unit of a coaxial speaker and related equipment to solve the above-mentioned problems.
[ invention ]
The invention aims to provide a high-pitch unit temperature protection method and related equipment for a coaxial loudspeaker, which can better protect the high-pitch unit by utilizing the temperature of the low-pitch unit to predict the temperature of the high-pitch unit.
In order to achieve the above object, in a first aspect, an embodiment of the present invention provides a method for protecting a high-pitched unit of a coaxial speaker, the coaxial speaker including a high-pitched unit for generating middle-high frequency sound and a low-pitched unit for generating low frequency sound, which are coaxially disposed; the high-pitch unit temperature protection method of the coaxial loudspeaker comprises the following steps:
acquiring a first real-time temperature of the bass unit;
the first real-time temperature and the preprocessed input signal are jointly subjected to predictive calculation through a high-pitch unit temperature predictive algorithm, and a second real-time temperature of the high-pitch unit in the current state is obtained through prediction; wherein the preprocessing input signal is a signal obtained by processing an audio input signal through an audio effect algorithm;
processing the second real-time temperature and the preprocessing input signal together through a high-pitch unit temperature protection algorithm to judge whether the second real-time temperature of the high-pitch unit is greater than a preset temperature threshold value or not:
if yes, the preprocessing input signal is output after power suppression.
Preferably, the temperature prediction algorithm of the high-pitched unit is a temperature model corresponding to the high-pitched unit.
In a second aspect, the present invention also provides a high-pitched unit temperature protection system of a coaxial speaker including a high-pitched unit for generating middle-high frequency sound and a low-pitched unit for generating low frequency sound, which are coaxially disposed; the input end of the high-pitch unit is connected to the output end of the power amplifier after passing through the series capacitor, and the input end of the low-pitch unit is connected to the output end of the power amplifier; the high-pitch unit temperature protection system of the coaxial loudspeaker comprises:
the sound effect algorithm module is used for processing the audio input signal through a sound effect algorithm to obtain a preprocessed input signal;
the temperature acquisition module is used for acquiring a first real-time temperature of the bass unit according to the I/V feedback of the power amplifier;
the high-pitch unit temperature prediction module is used for receiving the first real-time temperature and the preprocessing input signal, performing prediction calculation on the received first real-time temperature and the received preprocessing input signal through a high-pitch unit temperature prediction algorithm, and predicting to obtain a second real-time temperature of the high-pitch unit in the current state; the method comprises the steps of,
the high-pitch unit temperature protection module is used for jointly carrying out high-pitch unit temperature protection algorithm processing on the second real-time temperature and the preprocessing input signal so as to judge whether the second real-time temperature of the high-pitch unit is greater than a preset temperature threshold value: if yes, the preprocessing input signal is subjected to power suppression and then output to the high-pitched unit.
In a third aspect, the present invention further provides an electronic device, including a processor, a memory, and a temperature protection program for a coaxial speaker stored in the memory and capable of running on the processor, where the temperature protection program for the coaxial speaker implements the steps in the temperature protection method for the coaxial speaker according to the present invention when the temperature protection program for the coaxial speaker is executed by the processor.
In a fourth aspect, the present invention also provides a computer readable storage medium, where a high-pitched unit temperature protection program of a coaxial speaker is stored, where the high-pitched unit temperature protection program of the coaxial speaker is executed by a processor to implement the steps in the high-pitched unit temperature protection method of the coaxial speaker as provided by the present invention.
Compared with the related art, in the method for protecting the temperature of the high-pitched unit and the related equipment for protecting the temperature of the coaxial loudspeaker, the audio input signal is processed by the sound effect algorithm to obtain the preprocessed input signal, the first real-time temperature of the low-pitched unit is obtained, and the first real-time temperature and the preprocessed input signal are processed together by the high-pitched unit temperature protecting algorithm to judge whether the second real-time temperature of the high-pitched unit is greater than the preset temperature threshold, so that the temperature protection of the high-pitched unit is realized, namely, the known information (the first real-time temperature of the low-pitched unit) is processed, and the feedback prediction is performed on the unknown variable (the second real-time temperature of the high-pitched unit), so that the prediction precision is higher and the temperature protection reliability is better through the feedback link.
[ description of the drawings ]
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
fig. 1 is a block diagram of a prior art system for protecting the temperature of a tweeter unit of a coaxial speaker;
fig. 2 is a flow chart of a method for protecting the temperature of a high-pitched unit of a coaxial speaker according to an embodiment of the present invention;
fig. 3 is a block diagram of a temperature protection system for a high-pitched unit of a coaxial speaker according to an embodiment of the present invention;
fig. 4 is a block diagram of an electronic device according to an embodiment of the present invention.
[ detailed description ] of the invention
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Detailed description of the preferred embodiments
Referring to fig. 2, an embodiment of the present invention provides a method for protecting a temperature of a high-pitched unit of a coaxial speaker, where the coaxial speaker includes a high-pitched unit for generating middle-high frequency sound and a low-pitched unit for generating low frequency sound, which are coaxially arranged; the high-pitch unit temperature protection method of the coaxial loudspeaker comprises the following steps:
and step S1, acquiring a first real-time temperature of the bass unit.
In this step, the method for acquiring the first real-time temperature of the bass unit is the same as the acquisition method in the prior art, but is not limited to the description of the present embodiment.
For example, as a speaker of a bass unit, a temperature rise coefficient corresponding to a voice coil of the speaker is provided by a supplier as a known parameter; the temperature rise system is a system in which a direct current resistance is changed when the temperature of the voice coil is changed, the temperature rises, the resistance increases, and there is a correspondence between the amount of change in temperature and the rate of change in resistance, and generally the following relationship exists: (resistance change/original resistance)/temperature change=constant, which is generally referred to as temperature increase coefficient. Firstly calibrating direct flow resistance at normal temperature (for example, 25 ℃), superposing a small-amplitude low-frequency single-frequency signal, for example, 15Hz, in an audio input signal, acquiring voltage and current information at two ends of a loudspeaker through a power amplifier, and obtaining the current direct flow resistance after data processing; and acquiring temperature information of the voice coil of the current loudspeaker, namely the first real-time temperature of the sound unit, according to the temperature rise coefficient and the direct flow resistance at normal temperature.
S2, carrying out prediction calculation on the first real-time temperature and the preprocessed input signal through a high-pitch unit temperature prediction algorithm, and predicting to obtain a second real-time temperature of the high-pitch unit in the current state; the preprocessing input signal is a signal obtained by processing an audio input signal through an audio effect algorithm.
In this step, the temperature prediction algorithm of the treble unit is a temperature model corresponding to the treble unit. I.e. the real-time temperature of the voice coil converted to a tweeter unit (loudspeaker) by means of a temperature model.
Step S3, processing the second real-time temperature and the preprocessing input signal together through a high-pitch unit temperature protection algorithm to judge whether the second real-time temperature of the high-pitch unit is greater than a preset temperature threshold value or not:
if yes, the preprocessing input signal is output after power suppression. Such as to suppress its voltage and/or current level to adjust the input signal to control the temperature of the high-pitched unit (speaker) within a threshold range without damage from excessive temperatures.
If not, the input signal is directly input to the treble unit without performing the suppression processing.
Compared with the related art, in the method for protecting the temperature of the high-pitched unit and the related equipment for protecting the temperature of the coaxial loudspeaker, the audio input signal is processed by the sound effect algorithm to obtain the preprocessed input signal, the first real-time temperature of the low-pitched unit is obtained, and the first real-time temperature and the preprocessed input signal are processed together by the high-pitched unit temperature protecting algorithm to judge whether the second real-time temperature of the high-pitched unit is greater than the preset temperature threshold, so that the temperature protection of the high-pitched unit is realized, namely, the known information (the first real-time temperature of the low-pitched unit) is processed, and the feedback prediction is performed on the unknown variable (the second real-time temperature of the high-pitched unit), so that the prediction precision is higher and the temperature protection reliability is better through the feedback link.
Example two
Referring to fig. 3, an embodiment of the present invention further provides a high-pitched unit temperature protection system device 300 of a coaxial speaker, where the coaxial speaker 301 includes a high-pitched unit 3011 for generating middle-high frequency sound and a low-pitched unit 3012 for generating low frequency sound, which are coaxially disposed.
The input end of the high-pitch unit 3011 is connected to the output end of the power amplifier 302 after passing through the series capacitor C, and the input end of the low-pitch unit 3012 is connected to the output end of the power amplifier 302.
The high-pitched unit temperature protection system 300 of the coaxial speaker includes:
the sound effect algorithm module 303 is configured to process an audio input signal by a sound effect algorithm to obtain a preprocessed input signal.
A temperature acquisition module 304, wherein the temperature acquisition module 304 is configured to acquire a first real-time temperature of the bass unit 3012 according to current/voltage (I/V) feedback of the power amplifier 302.
The treble unit temperature prediction module 305 is configured to receive the first real-time temperature and the pre-processed input signal, and perform prediction calculation on the received first real-time temperature and the pre-processed input signal through a treble unit temperature prediction algorithm, so as to predict and obtain a second real-time temperature of the treble unit 3011 in a current state.
The temperature prediction algorithm of the high-pitched unit is a temperature model corresponding to the high-pitched unit 3011. I.e. the real-time temperature of the voice coil converted to a tweeter unit (loudspeaker) by means of a temperature model.
The high-pitch unit temperature protection module 306, where the high-pitch unit temperature protection module 306 is configured to perform high-pitch unit temperature protection algorithm processing on the second real-time temperature and the preprocessed input signal together, so as to determine whether the second real-time temperature of the high-pitch unit 3011 is greater than a preset temperature threshold:
if yes, the preprocessing input signal is output to the high-pitched unit 3011 after power suppression. Such as to suppress its voltage and/or current level to adjust the input signal to control the temperature of the tweeter unit (speaker) within a threshold range without being damaged by excessive temperatures, the suppression function being achieved primarily by controlling the power amplifier 302.
If not, the input signal is directly input to the treble unit 3011 without performing the suppression processing.
In this embodiment, the technical effects and principles achieved by the temperature protection system 300 for a high-pitched unit of a coaxial speaker are the same as those achieved by the temperature protection method for a high-pitched unit of a coaxial speaker according to the present invention, and are not described herein.
Example III
Referring to fig. 4, an embodiment of the present invention further provides an electronic device 400, including a processor 401, a memory 402, and a temperature protection program for a coaxial speaker stored in the memory 402 and capable of running on the processor 401, where the temperature protection program for the coaxial speaker implements the steps in the temperature protection method for the coaxial speaker according to the present invention when executed by the processor 401:
and step S1, acquiring a first real-time temperature of the bass unit.
In this step, the method for acquiring the first real-time temperature of the bass unit is the same as the acquisition method in the prior art, but is not limited to the description of the present embodiment.
For example, as a speaker of a bass unit, a temperature rise coefficient corresponding to a voice coil of the speaker is provided by a supplier as a known parameter; the temperature rise system is a system in which a direct current resistance is changed when the temperature of the voice coil is changed, the temperature rises, the resistance increases, and there is a correspondence between the amount of change in temperature and the rate of change in resistance, and generally the following relationship exists: (resistance change/original resistance)/temperature change=constant, which is generally referred to as temperature increase coefficient. Firstly calibrating direct flow resistance at normal temperature (for example, 25 ℃), superposing a small-amplitude low-frequency single-frequency signal, for example, 15Hz, in an audio input signal, acquiring voltage and current information at two ends of a loudspeaker through a power amplifier, and obtaining the current direct flow resistance after data processing; and acquiring temperature information of the voice coil of the current loudspeaker, namely the first real-time temperature of the sound unit, according to the temperature rise coefficient and the direct flow resistance at normal temperature.
S2, carrying out prediction calculation on the first real-time temperature and the preprocessed input signal through a high-pitch unit temperature prediction algorithm, and predicting to obtain a second real-time temperature of the high-pitch unit in the current state; the preprocessing input signal is a signal obtained by processing an audio input signal through an audio effect algorithm.
In this step, the temperature prediction algorithm of the treble unit is a temperature model corresponding to the treble unit. I.e. the real-time temperature of the voice coil converted to a tweeter unit (loudspeaker) by means of a temperature model.
Step S3, processing the second real-time temperature and the preprocessing input signal together through a high-pitch unit temperature protection algorithm to judge whether the second real-time temperature of the high-pitch unit is greater than a preset temperature threshold value or not:
if yes, the preprocessing input signal is output after power suppression. Such as to suppress its voltage and/or current level to adjust the input signal to control the temperature of the high-pitched unit (speaker) within a threshold range without damage from excessive temperatures.
If not, the input signal is directly input to the treble unit without performing the suppression processing.
It should be noted that, when the electronic device 400 is used, the technical effects achieved by the method for protecting a high-pitched unit of the coaxial speaker described above can be achieved, and the description of the method for protecting a high-pitched unit of the coaxial speaker described above is specifically referred to and will not be repeated here.
Example IV
The embodiment of the invention also provides a computer readable storage medium, on which a high-pitch unit temperature protection program of the coaxial loudspeaker is stored, wherein the high-pitch unit temperature protection program of the coaxial loudspeaker realizes the steps in the high-pitch unit temperature protection method of the coaxial loudspeaker when being executed by a processor, so that the technical effect which can be realized is the same as that which is realized by the high-pitch unit temperature protection method of the coaxial loudspeaker, and is not repeated herein.
While the invention has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the invention.
Claims (5)
1. A method for protecting a temperature of a high-pitched unit of a coaxial speaker, the coaxial speaker including a high-pitched unit for generating middle-high frequency sound and a low-pitched unit for generating low frequency sound, which are coaxially disposed, the method comprising the steps of:
acquiring a first real-time temperature of the bass unit;
the first real-time temperature and the preprocessed input signal are jointly subjected to predictive calculation through a high-pitch unit temperature predictive algorithm, and a second real-time temperature of the high-pitch unit in the current state is obtained through prediction; wherein the preprocessing input signal is a signal obtained by processing an audio input signal through an audio effect algorithm;
processing the second real-time temperature and the preprocessing input signal together through a high-pitch unit temperature protection algorithm to judge whether the second real-time temperature of the high-pitch unit is greater than a preset temperature threshold value or not:
if yes, the preprocessing input signal is output after power suppression.
2. The method of claim 1, wherein the temperature prediction algorithm of the tweeter unit is a temperature model corresponding to the tweeter unit.
3. A high-pitched unit temperature protection system of a coaxial speaker, the coaxial speaker comprising a high-pitched unit for generating middle-high frequency sound and a low-pitched unit for generating low frequency sound, which are coaxially arranged; the input end of the high-pitch unit is connected to the output end of the power amplifier after passing through the series capacitor, and the input end of the low-pitch unit is connected to the output end of the power amplifier; the high-pitch unit temperature protection system of the coaxial loudspeaker is characterized by comprising:
the sound effect algorithm module is used for processing the audio input signal through a sound effect algorithm to obtain a preprocessed input signal;
the temperature acquisition module is used for acquiring a first real-time temperature of the bass unit according to the I/V feedback of the power amplifier;
the high-pitch unit temperature prediction module is used for receiving the first real-time temperature and the preprocessing input signal, performing prediction calculation on the received first real-time temperature and the received preprocessing input signal through a high-pitch unit temperature prediction algorithm, and predicting to obtain a second real-time temperature of the high-pitch unit in the current state; the method comprises the steps of,
the high-pitch unit temperature protection module is used for jointly carrying out high-pitch unit temperature protection algorithm processing on the second real-time temperature and the preprocessing input signal so as to judge whether the second real-time temperature of the high-pitch unit is greater than a preset temperature threshold value: if yes, the preprocessing input signal is subjected to power suppression and then output to the high-pitched unit.
4. An electronic device comprising a processor, a memory, a temperature protection program for a coaxial speaker stored on the memory and operable on the processor, the temperature protection program for the coaxial speaker, when executed by the processor, performing the steps in the temperature protection method for the coaxial speaker of any one of claims 1-2.
5. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a treble unit temperature protection program of a coaxial loudspeaker, which, when executed by a processor, implements the steps of the method for protecting a treble unit temperature of a coaxial loudspeaker according to any one of claims 1-2.
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