High-frequency unit temperature protection method for coaxial speaker and related device

Abstract

The embodiment of the application provides a kind of high unit temperature protection method of coaxial loudspeaker and related equipment, coaxial loudspeaker includes high unit and bass unit, the method includes the following steps: obtaining the first real-time temperature of bass unit;First real-time temperature and preprocessed input signal are predicted and calculated by high unit temperature prediction algorithm, and the second real-time temperature of high unit under current state is predicted;In, preprocessed input signal is the signal obtained after audio input signal is handled by audio effect algorithm;Second real-time temperature and preprocessed input signal are handled by high unit temperature protection algorithm to determine whether the second real-time temperature of high unit is greater than preset temperature threshold, if yes, then power suppression is carried out to preprocessed input signal.Compared with related art, the high unit temperature protection method of coaxial loudspeaker and related equipment provided by the application can better protect the high unit, and the reliability is better.

Description

[Technical Field]

[0001] This invention relates to the field of loudspeaker technology, and in particular to a method and related equipment for temperature protection of the tweeter unit of a coaxial loudspeaker. [Background Technology]

[0002] Speakers are indispensable components in mobile devices, especially coaxial speakers, a new type of high-end speaker that has recently emerged in the consumer electronics field. These speakers integrate two speaker units (including a woofer for low-frequency generation and a tweeter for mid-to-high frequency generation) into a single integrated structure through structural design. Current corresponding driving solutions include: Figure 1 As shown, a capacitor is connected in series at the input of the tweeter, and the capacitor is connected in parallel with the tweeter and woofer, finally connected to the output of the intelligent power amplifier. During speaker operation, if the input (peak voltage, power, etc.) is too high, there is a risk of over-amplitude and over-temperature, which may produce abnormal noise in some cases and damage the components in severe cases. As an important part of speaker protection, temperature protection can adjust the input signal through a protection algorithm when the speaker temperature is too high, preventing damage due to overheating.

[0003] However, in existing technologies, loudspeaker temperature detection methods involve superimposing a small low-frequency signal (e.g., 15Hz) onto the input signal, calculating the DC resistance using the low-frequency response, and then converting this to obtain the real-time voice coil temperature using a temperature model. For the low-frequency detection signal, due to the presence of capacitance, the branch containing the tweeter is approximately open-circuited, and what is detected is the resistance of the woofer, thus providing the woofer's temperature. The high-temperature protection method involves processing the input audio signal using an audio effect algorithm before feeding it into a tweeter temperature protection algorithm. This algorithm analyzes the received signal and, if it determines that the loudspeaker is at risk of overheating under the current input, processes the audio signal before feeding it back to the loudspeaker. If there is no risk, the audio signal is generally not processed and fed directly to the loudspeaker. However, the main risk lies in the lack of real-time temperature feedback correction; that is, there is no feedback loop, resulting in limited prediction accuracy.

[0004] Therefore, it is necessary to provide a new method and related equipment for protecting the temperature of the tweeter unit of a coaxial loudspeaker to solve the above-mentioned technical problems. [Summary of the Invention]

[0005] The purpose of this invention is to provide a method and related equipment for temperature protection of the tweeter unit of a coaxial loudspeaker by predicting the temperature of the tweeter unit using the temperature of the woofer unit, thereby better protecting the tweeter unit from temperature.

[0006] To achieve the above objectives, in a first aspect, embodiments of the present invention provide a method for protecting the temperature of the tweeter unit of a coaxial loudspeaker, wherein the coaxial loudspeaker includes a tweeter unit for generating mid-to-high frequency sounds and a woofer unit for generating low frequency sounds, which are coaxially arranged; the method for protecting the temperature of the tweeter unit of the coaxial loudspeaker includes the following steps:

[0007] Obtain the first real-time temperature of the bass unit;

[0008] The first real-time temperature and the preprocessed input signal are used together to predict the second real-time temperature of the tweeter in the current state by using a tweeter temperature prediction algorithm; wherein, the preprocessed input signal is the signal obtained by processing the audio input signal through a sound effect algorithm;

[0009] The second real-time temperature and the preprocessed input signal are processed together by a tweeter temperature protection algorithm to determine whether the second real-time temperature of the tweeter is greater than a preset temperature threshold.

[0010] If so, the preprocessed input signal is output after power suppression.

[0011] Preferably, the tweeter temperature prediction algorithm is a temperature model corresponding to the tweeter.

[0012] Secondly, the present invention also provides a temperature protection system for the tweeter unit of a coaxial loudspeaker, the coaxial loudspeaker including a tweeter unit for generating mid-to-high frequency sounds and a woofer unit for generating low frequency sounds, arranged coaxially; the input terminal of the tweeter unit is connected to the output terminal of a power amplifier via a series capacitor, and the input terminal of the woofer unit is connected to the output terminal of the power amplifier; the temperature protection system for the tweeter unit of the coaxial loudspeaker includes:

[0013] The audio effect algorithm module is used to process the audio input signal using the audio effect algorithm to obtain a preprocessed input signal.

[0014] A temperature acquisition module is used to acquire the first real-time temperature of the bass unit based on the I / V feedback of the power amplifier.

[0015] A tweeter temperature prediction module, wherein the tweeter temperature prediction module is used to receive a first real-time temperature and a preprocessed input signal, and to perform prediction calculations on the received first real-time temperature and the preprocessed input signal using a tweeter temperature prediction algorithm to predict a second real-time temperature of the tweeter in the current state; and,

[0016] A tweeter temperature protection module is used to process the second real-time temperature and the pre-processed input signal together using a tweeter temperature protection algorithm to determine whether the second real-time temperature of the tweeter is greater than a preset temperature threshold. If so, the pre-processed input signal is power suppressed and then output to the tweeter.

[0017] Thirdly, the present invention also provides an electronic device, including a processor, a memory, and a temperature protection program for the tweeter unit of a coaxial speaker stored in the memory and executable on the processor. When the coaxial speaker temperature protection program is executed by the processor, it implements the steps in the temperature protection method for the tweeter unit of the coaxial speaker provided by the present invention.

[0018] Fourthly, the present invention also provides a computer-readable storage medium storing a temperature protection program for the tweeter unit of a coaxial speaker, wherein when the temperature protection program for the tweeter unit of the coaxial speaker is executed by a processor, the program implements the steps in the temperature protection method for the tweeter unit of the coaxial speaker provided by the present invention.

[0019] Compared with related technologies, the coaxial loudspeaker tweeter temperature protection method and related equipment of the present invention obtain a pre-processed input signal after the audio input signal is processed by the sound effect algorithm. The first real-time temperature of the bass unit is obtained, and the first real-time temperature and the pre-processed input signal are jointly processed by the tweeter temperature protection algorithm to determine whether the second real-time temperature of the tweeter is greater than a preset temperature threshold, thereby realizing the temperature protection of the tweeter. That is, by processing the known information (the first real-time temperature of the bass unit), the unknown variable (the second real-time temperature of the tweeter) is predicted in a feedback manner, thereby making the prediction accuracy higher and the temperature protection reliability better through the feedback link. [Attached Image Description]

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0021] Figure 1 This is a structural block diagram of a temperature protection system for the tweeter unit of a coaxial loudspeaker in the prior art.

[0022] Figure 2 A flowchart illustrating a method for protecting the tweeter unit of a coaxial loudspeaker according to an embodiment of the present invention;

[0023] Figure 3 This is a structural block diagram of a temperature protection system for the tweeter unit of a coaxial loudspeaker provided in an embodiment of the present invention;

[0024] Figure 4 This is a structural block diagram of an electronic device provided in an embodiment of the present invention.

Detailed Implementation Methods

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Implementation of List 1

[0027] Please combine Figure 2 As shown, this embodiment of the invention provides a method for protecting the temperature of the tweeter unit of a coaxial loudspeaker. The coaxial loudspeaker includes a tweeter unit for generating mid-to-high frequency sounds and a woofer unit for generating low frequency sounds, which are coaxially arranged. The method for protecting the temperature of the tweeter unit of the coaxial loudspeaker includes the following steps:

[0028] Step S1: Obtain the first real-time temperature of the bass unit.

[0029] In this step, the method for obtaining the first real-time temperature of the bass unit is the same as the method in the prior art, but is not limited to the method described in this embodiment.

[0030] For example, in a speaker acting as a woofer, the temperature rise coefficient of the speaker's voice coil is provided by the supplier and is a known parameter. A temperature rise system refers to the change in DC resistance caused by a change in the voice coil's temperature. As temperature increases, resistance increases, and there is a corresponding relationship between the amount of temperature change and the rate of change in resistance. Generally, this relationship is: (resistance change / original resistance) / temperature change = constant, and this constant is generally called the temperature rise coefficient. First, the DC resistance at room temperature (e.g., 25 degrees Celsius) is calibrated. A small-amplitude, low-frequency single-frequency signal, such as 15Hz, is superimposed on the audio input signal. The voltage and current information across the speaker is obtained through a power amplifier, and the current DC resistance is obtained after data processing. Based on the temperature rise coefficient and the DC resistance at room temperature, the current temperature information of the speaker's voice coil is obtained, i.e., the first real-time temperature of the speaker unit.

[0031] Step S2: The first real-time temperature and the preprocessed input signal are used together to perform prediction calculation through the tweeter temperature prediction algorithm to predict the second real-time temperature of the tweeter in the current state; wherein, the preprocessed input signal is the signal obtained after the audio input signal is processed by the sound effect algorithm.

[0032] In this step, the tweeter temperature prediction algorithm is based on the temperature model corresponding to the tweeter. That is, the real-time voice coil temperature of the tweeter (loudspeaker) is calculated using the temperature model.

[0033] Step S3: The second real-time temperature and the preprocessed input signal are processed together by the tweeter temperature protection algorithm to determine whether the second real-time temperature of the tweeter is greater than a preset temperature threshold.

[0034] If so, the preprocessed input signal is output after power suppression. For example, its voltage and / or current magnitude is suppressed to adjust the input signal, thereby controlling the temperature of the tweeter (speaker) within a threshold range to prevent damage due to excessive temperature.

[0035] If not, there is no need to suppress the input signal; it can be directly input to the tweeter.

[0036] Compared with related technologies, the coaxial loudspeaker tweeter temperature protection method and related equipment of the present invention obtain a pre-processed input signal after the audio input signal is processed by the sound effect algorithm. The first real-time temperature of the bass unit is obtained, and the first real-time temperature and the pre-processed input signal are jointly processed by the tweeter temperature protection algorithm to determine whether the second real-time temperature of the tweeter is greater than a preset temperature threshold, thereby realizing the temperature protection of the tweeter. That is, by processing the known information (the first real-time temperature of the bass unit), the unknown variable (the second real-time temperature of the tweeter) is predicted in a feedback manner, thereby making the prediction accuracy higher and the temperature protection reliability better through the feedback link.

[0037] Example 2

[0038] Please combine Figure 3 As shown, this embodiment of the invention also provides a temperature protection system 300 for the tweeter unit of a coaxial loudspeaker, wherein the coaxial loudspeaker 301 includes a tweeter unit 3011 for generating mid-to-high frequency sounds and a woofer unit 3012 for generating low frequency sounds, which are coaxially arranged.

[0039] The input terminal of the tweeter 3011 is connected to the output terminal of the power amplifier 302 via a series capacitor C, and the input terminal of the woofer 3012 is connected to the output terminal of the power amplifier 302.

[0040] The coaxial loudspeaker tweeter temperature protection system 300 includes:

[0041] The sound effect algorithm module 303 is used to process the audio input signal through the sound effect algorithm to obtain a preprocessed input signal.

[0042] Temperature acquisition module 304 is used to acquire the first real-time temperature of the bass unit 3012 based on the current / voltage (I / V) feedback of the power amplifier 302.

[0043] The tweeter temperature prediction module 305 is used to receive the first real-time temperature and the preprocessed input signal, and to perform prediction calculation on the received first real-time temperature and the preprocessed input signal through the tweeter temperature prediction algorithm to predict the second real-time temperature of the tweeter 3011 in the current state.

[0044] The tweeter temperature prediction algorithm is based on the temperature model corresponding to the tweeter 3011. That is, it calculates the real-time voice coil temperature of the tweeter (loudspeaker) using the temperature model.

[0045] The tweeter unit temperature protection module 306 is used to process the second real-time temperature and the preprocessed input signal together using a tweeter unit temperature protection algorithm to determine whether the second real-time temperature of the tweeter unit 3011 is greater than a preset temperature threshold.

[0046] If so, the preprocessed input signal is power suppressed and then output to the tweeter 3011. For example, the voltage and / or current are suppressed to adjust the input signal, thereby controlling the temperature of the tweeter (speaker) within a threshold range to prevent damage due to excessive temperature. This suppression function is mainly achieved by controlling the power amplifier 302.

[0047] If not, there is no need to suppress the input signal; it can be directly input to the tweeter 3011.

[0048] In this embodiment, the technical effect achieved by the coaxial speaker tweeter temperature protection system 300 is the same as the technical effect and principle achieved by the coaxial speaker tweeter temperature protection method provided above, and will not be repeated here.

[0049] Example 3

[0050] Please combine Figure 4As shown, this embodiment of the invention also provides an electronic device 400, including a processor 401, a memory 402, and a coaxial speaker tweeter temperature protection program stored in the memory 402 and executable on the processor 401. When the coaxial speaker tweeter temperature protection program is executed by the processor 401, it implements the steps in the coaxial speaker tweeter temperature protection method provided by the present invention as follows:

[0051] Step S1: Obtain the first real-time temperature of the bass unit.

[0052] In this step, the method for obtaining the first real-time temperature of the bass unit is the same as the method in the prior art, but is not limited to the method described in this embodiment.

[0053] For example, in a speaker acting as a woofer, the temperature rise coefficient of the speaker's voice coil is provided by the supplier and is a known parameter. A temperature rise system refers to the change in DC resistance caused by a change in the voice coil's temperature. As temperature increases, resistance increases, and there is a corresponding relationship between the amount of temperature change and the rate of change in resistance. Generally, this relationship is: (resistance change / original resistance) / temperature change = constant, and this constant is generally called the temperature rise coefficient. First, the DC resistance at room temperature (e.g., 25 degrees Celsius) is calibrated. A small-amplitude, low-frequency single-frequency signal, such as 15Hz, is superimposed on the audio input signal. The voltage and current information across the speaker is obtained through a power amplifier, and the current DC resistance is obtained after data processing. Based on the temperature rise coefficient and the DC resistance at room temperature, the current temperature information of the speaker's voice coil is obtained, i.e., the first real-time temperature of the speaker unit.

[0054] Step S2: The first real-time temperature and the preprocessed input signal are used together to perform prediction calculation through the tweeter temperature prediction algorithm to predict the second real-time temperature of the tweeter in the current state; wherein, the preprocessed input signal is the signal obtained after the audio input signal is processed by the sound effect algorithm.

[0055] In this step, the tweeter temperature prediction algorithm is based on the temperature model corresponding to the tweeter. That is, the real-time voice coil temperature of the tweeter (loudspeaker) is calculated using the temperature model.

[0056] Step S3: The second real-time temperature and the preprocessed input signal are processed together by the tweeter temperature protection algorithm to determine whether the second real-time temperature of the tweeter is greater than a preset temperature threshold.

[0057] If so, the preprocessed input signal is output after power suppression. For example, its voltage and / or current magnitude is suppressed to adjust the input signal, thereby controlling the temperature of the tweeter (speaker) within a threshold range to prevent damage due to excessive temperature.

[0058] If not, there is no need to suppress the input signal; it can be directly input to the tweeter.

[0059] It should be noted that when the electronic device 400 is in use, it can achieve the technical effect of the temperature protection method for the tweeter unit of the coaxial speaker described above. For details, please refer to the description of the temperature protection method for the tweeter unit of the coaxial speaker described above, which will not be repeated here.

[0060] Example 4

[0061] This invention also provides a computer-readable storage medium storing a temperature protection program for the tweeter unit of a coaxial speaker. When the coaxial speaker tweeter unit temperature protection program is executed by a processor, it implements the steps in the coaxial speaker tweeter unit temperature protection method provided by this invention, thereby achieving the same technical effect as the coaxial speaker tweeter unit temperature protection method described above, which will not be repeated here.

[0062] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A method for temperature protection of the tweeter unit of a coaxial loudspeaker, the coaxial loudspeaker comprising a tweeter unit for generating mid-to-high frequency sounds and a woofer unit for generating low frequency sounds, coaxially arranged, characterized in that... The temperature protection method for the tweeter unit of this coaxial loudspeaker includes the following steps: Obtain the first real-time temperature of the bass unit; The first real-time temperature and the preprocessed input signal are used together to predict the second real-time temperature of the tweeter in the current state by using a tweeter temperature prediction algorithm; wherein, the preprocessed input signal is the signal obtained by processing the audio input signal through a sound effect algorithm; The second real-time temperature and the preprocessed input signal are processed together by a tweeter temperature protection algorithm to determine whether the second real-time temperature of the tweeter is greater than a preset temperature threshold. If so, the preprocessed input signal is output after power suppression.

2. The method for temperature protection of the tweeter unit of a coaxial loudspeaker according to claim 1, characterized in that, The tweeter temperature prediction algorithm is a temperature model corresponding to the tweeter.

3. A temperature protection system for the tweeter unit of a coaxial loudspeaker, the coaxial loudspeaker comprising a tweeter unit for generating mid-to-high frequency sounds and a woofer unit for generating low frequency sounds, arranged coaxially; the input terminal of the tweeter unit is connected to the output terminal of a power amplifier via a series capacitor, and the input terminal of the woofer unit is connected to the output terminal of the power amplifier; characterized in that, The temperature protection system for the tweeter unit of the coaxial loudspeaker includes: The audio effect algorithm module is used to process the audio input signal using the audio effect algorithm to obtain a preprocessed input signal. A temperature acquisition module is used to acquire the first real-time temperature of the bass unit based on the I / V feedback of the power amplifier. A tweeter temperature prediction module, wherein the tweeter temperature prediction module is used to receive a first real-time temperature and a preprocessed input signal, and to perform prediction calculations on the received first real-time temperature and the preprocessed input signal using a tweeter temperature prediction algorithm to predict a second real-time temperature of the tweeter in the current state; and, A tweeter temperature protection module is used to process the second real-time temperature and the pre-processed input signal together using a tweeter temperature protection algorithm to determine whether the second real-time temperature of the tweeter is greater than a preset temperature threshold. If so, the pre-processed input signal is power suppressed and then output to the tweeter.

4. An electronic device, characterized in that, The method includes a processor, a memory, and a temperature protection program for the tweeter unit of a coaxial speaker stored in the memory and executable on the processor. When the coaxial speaker temperature protection program is executed by the processor, it implements the steps in the temperature protection method for the tweeter unit of a coaxial speaker as described in any one of claims 1-2.

5. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a temperature protection program for the tweeter unit of a coaxial speaker, which, when executed by a processor, implements the steps of the temperature protection method for the tweeter unit of a coaxial speaker as described in any one of claims 1-2.

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