Protection method, protection system, protection device and protection means for coaxial loudspeaker

Abstract

The application provides a coaxial loudspeaker protection method, a protection system, a protection device and a protection apparatus. The protection method comprises the following steps: temperature modeling of a high-pitched unit to obtain a transfer function of voltage and temperature of the high-pitched unit; temperature and amplitude modeling of a bass unit to obtain a transfer function of voltage, amplitude and temperature of the bass unit; modeling of a coaxial device with the high-pitched unit and the bass unit to obtain a heat conduction function between the coaxial device; current temperature calculation of the high-pitched unit according to a current voltage of the high-pitched unit; temperature prediction of the bass unit at a next moment according to temperature information fed back by a current of the bass unit at a previous moment; series connection of the high-pitched unit and the bass unit of the coaxial device; target gain acquisition according to the current temperature of the high-pitched unit, the temperature of the bass unit at the next moment, an original audio signal and a corresponding preset threshold; and original audio signal processing according to the target gain. The application can protect the coaxial loudspeaker.

Description

[0001] The present application relates to a coaxial speaker, in particular to a coaxial speaker protection method, protection system, protection device and protection means.

[0002] The prior art coaxial speaker drives the bass unit and the treble unit at the same time through the same power amplifier. When the speaker plays large signals such as high loudness and high frequency, the temperature of the speaker gradually rises, resulting in a shift in amplitude, and further abnormal conditions such as noise, resulting in distortion of the speaker.

[0003] Therefore, it is necessary to provide a coaxial speaker protection method, protection system, protection device and protection means.

[0004] The present application relates to a coaxial speaker, in particular to a coaxial speaker protection method, protection system, protection device and protection means.

[0005] The technical solution of the present application is as follows:

[0006] A coaxial speaker protection method, the coaxial speaker protection method comprising:

[0007] Modeling the temperature of the treble unit to obtain the transfer function of the voltage and temperature of the treble unit;

[0008] Modeling the temperature and amplitude of the bass unit to obtain the transfer function of the voltage, amplitude and temperature of the bass unit;

[0009] Modeling the coaxial device with the treble unit and the bass unit to obtain the heat conduction function between the coaxial devices;

[0010] Calculating the current temperature of the treble unit according to the current voltage of the treble unit;

[0011] Predicting the temperature of the bass unit at the next time according to the temperature information fed back by the current of the bass unit at the last time;

[0012] The treble unit protection and bass unit protection of the coaxial device are connected in series, the target gain is obtained according to the current temperature of the treble unit, the temperature of the bass unit at the next time, the original audio signal and the corresponding preset threshold, and the original audio signal is processed according to the target gain.

[0013] In a possible implementation, the transfer function of the voltage, amplitude and temperature of the bass unit is composed of the transfer function of the voltage and temperature of the bass unit, and the transfer function of the voltage and amplitude of the bass unit in series.

[0014] ​​​In a possible implementation, the transfer function of the voltage of the bass unit and the temperature is obtained by a thermal model function of the bass unit, I / V feedback data, and a heat conduction function between the coaxial device.

[0015] In a possible implementation, the transfer function of the voltage of the high unit and the temperature is composed of a transfer function of the total voltage of the power amplifier of the coaxial speaker and the voltage of the high unit, a transfer function of the voltage of the high unit and the temperature, and a heat conduction function between the coaxial device.

[0016] In a possible implementation, the transfer function of the voltage of the high unit and the temperature is obtained by a thermal model function of the high unit and a simulation power calculation.

[0017] The second aspect of the present application provides a protection system of a coaxial speaker, applied to the protection method of the coaxial speaker in any one of the above aspects, and the protection system of the coaxial speaker comprises a bass unit, a high unit, a signal control module, and a heat conduction module.

[0018] The signal control module is configured to weight the signal gain of the bass unit and the high unit.

[0019] The heat conduction module is configured to establish a heat transfer model between the high unit and the bass unit.

[0020] In a possible implementation, the bass unit comprises:

[0021] A bass signal acquisition module;

[0022] An I / V feedback module configured to feedback the voltage of the bass unit.

[0023] A voice coil temperature calculation module configured to feedback the temperature of the voice coil.

[0024] A bass temperature control module configured to perform gain processing on the original audio signal by a temperature gain.

[0025] An amplitude module configured to obtain a transfer function of the amplitude and the voltage of the bass unit.

[0026] A bass amplitude prediction module configured to predict the amplitude and perform gain processing on the original audio signal by an amplitude gain.

[0027] The high unit comprises:

[0028] A high signal acquisition module;

[0029] a temperature module for obtaining a transfer function of voltage and temperature of the tweeter unit;

[0030] a tweeter temperature control module for predicting the temperature of the tweeter unit and performing gain processing on the original audio signal by using a temperature gain.

[0031] The third aspect of the present application provides a coaxial loudspeaker protection device applied to the coaxial loudspeaker protection method of any one of the preceding aspects, the coaxial loudspeaker protection device comprising a main link and a plurality of branch links connected in parallel with the main link;

[0032] The main link comprises a signal control module, the input end of the signal control module being configured to receive an original audio signal, and the output end of the signal control module being connected with the amplitude control module of the woofer unit and the output end of the tweeter temperature control module of the tweeter unit, and the output end of the signal control module being connected with a coaxial device, and the output end of each branch link being connected with the input end of the signal control module.

[0033] At least one of the branch links comprises a tweeter temperature calculation module, and a temperature module and a heat conduction module are connected in series in the remaining branch links.

[0034] At least one of the branch links comprises a woofer temperature calculation module, and an I / V feedback module and a voice coil temperature calculation module are connected in series in the remaining branch links.

[0035] At least one of the branch links comprises a woofer amplitude prediction module, and an I / V feedback module and an amplitude module are connected in series in the remaining branch links.

[0036] In a possible implementation, the tweeter temperature calculation module and the woofer temperature calculation module each comprise a thermal model function and a DC resistance calculation module.

[0037] The fourth aspect of the present application provides a coaxial loudspeaker protection device, characterized in that at least one coaxial loudspeaker protection device is connected in series with the audio signal input end of the coaxial loudspeaker protection device.

[0038] The coaxial loudspeaker protection device is the coaxial loudspeaker protection device of any one of the preceding aspects.

[0039] The present application has the advantages that the tweeter unit is protected by feedforward, the woofer unit is protected by feedback, the original audio is adjusted to reduce the power of the loudspeaker, thereby reducing the temperature of the coaxial loudspeaker, and the possibility of distortion and noise of the coaxial loudspeaker is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 A schematic diagram of the coaxial loudspeaker provided by the present invention;

[0041] Figure 2 A schematic diagram of the protection system for the coaxial loudspeaker provided by the present invention;

[0042] Figure 3 This is a schematic diagram of the high-frequency temperature control module provided by the present invention;

[0043] Figure 4 This is a schematic diagram of the bass temperature control module provided by the present invention.

[0044] Figure Labels

[0045] 1- Bass unit;

[0046] 2-Tweeter unit.

Detailed Implementation Methods

[0047] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0048] This invention provides a method for protecting a coaxial loudspeaker, such as... Figure 1 As shown, a coaxial speaker can be a speaker that simultaneously drives both the woofer 1 and the tweeter 2 using a single power amplifier (PA). Protection methods for coaxial speakers include:

[0049] Temperature modeling is performed on tweeter 2 to obtain its voltage-temperature transfer function. Temperature and amplitude modeling is performed on woofer 1 to obtain its voltage, amplitude, and temperature transfer functions. The coaxial device, a combined unit of tweeter 2 and woofer 1, is modeled to obtain its thermal conductivity function. Modeling is performed on the coaxial device of tweeter 2 and woofer 1. The current temperature of tweeter 2 is calculated based on its current voltage, and its temperature is fed forward. The temperature of woofer 1 at the next moment is predicted based on the temperature information fed back from the current of woofer 1 at the previous moment, thus providing temperature information feedback for woofer 1. The output of tweeter 2 is connected to the input of woofer 1 to connect tweeter protection and woofer protection in series. The target gain is obtained based on the original audio signal and the corresponding preset threshold, and the original audio signal is processed according to the target gain. The preset threshold is the maximum temperature of the coaxial speaker, and the target gain is the desired gain. For example, if the preset threshold of the coaxial speaker is 100 degrees and the predicted temperature of the coaxial speaker is about to reach 200 degrees, the original audio signal needs to be compressed by 70%, and the target gain is 70%.

[0050] In the mode provided by the present application, the bass unit 1 can be protected by monitoring the current of the bass unit 1 in a feedback mode, the treble unit 2 is protected in a feedforward temperature protection mode, the original audio signal is adjusted according to the target gain to reduce the load of the loudspeaker, so as to reduce the possibility of temperature overheat of the coaxial loudspeaker, thereby protecting the coaxial loudspeaker, reducing noise and reducing the possibility of distortion of the coaxial loudspeaker.

[0051] In a possible implementation, the transfer function of the voltage, amplitude and temperature of the bass unit 1 is the overall transfer function of the bass unit 1 protection, and the overall transfer function of the bass unit 1 protection is obtained by connecting the transfer function of the voltage and temperature of the bass unit 1 and the transfer function of the voltage and amplitude of the bass unit 1 in series.

[0052] The data of the bass unit 1 is integrated by a corresponding algorithm to obtain the transfer function of the voltage, amplitude and temperature of the bass unit 1, so that the bass unit 1 can be better protected in a feedback mode.

[0053] In a possible implementation, the transfer function of the voltage and temperature of the bass unit 1 is obtained by a thermal model function of the bass unit, I / V feedback data and a heat conduction function between coaxial devices.

[0054] The transfer function of the voltage and temperature of the bass unit 1 can be obtained by calculating the corresponding data, so as to facilitate the protection of the bass unit 1.

[0055] In a possible implementation, the transfer function of the voltage and temperature of the treble unit 2 is composed of the transfer function of the total voltage of the power amplifier of the coaxial loudspeaker and the voltage of the treble unit 2, the transfer function of the voltage and temperature of the treble unit 2 and the heat conduction function between coaxial devices.

[0056] The data of the treble unit 2 is integrated by a corresponding algorithm to obtain the transfer function of the voltage and temperature of the treble unit 2, so that the treble unit 2 can be protected in a feedforward mode.

[0057] In a possible implementation, the transfer function of the voltage and temperature of the treble unit 2 is obtained by a thermal model function of the treble unit and a simulated power calculation.

[0058] The transfer function of the voltage and temperature of the treble unit 2 can be obtained in this way.

[0059] As Figure 2As shown, the present invention also provides a protection system for a coaxial loudspeaker, which can be applied to the protection methods for coaxial loudspeakers described above. The protection system for the coaxial loudspeaker includes a woofer 1, a tweeter 2, a signal control unit, and a heat conduction module. The heat conduction module is used to establish a heat transfer model between the tweeter 2 and the woofer 1, and the signal control module is used to weight the signal gains of the woofer 1 and the tweeter 2.

[0060] A heat transfer model between tweeter 2 and woofer 1 is established using a heat conduction module to obtain the heat transfer coefficient between coaxial components, thereby better protecting the coaxial speaker. The signal control module dynamically adjusts the gain of woofer 1 and tweeter 2 through corresponding algorithms to better protect the coaxial speaker and improve sound quality.

[0061] like Figure 2 As shown, in one possible implementation, the woofer 1 includes a bass signal acquisition module, an I / V feedback module, a voice coil temperature calculation module, a bass temperature control module, an amplitude module, and a bass amplitude prediction module. The bass signal acquisition module acquires the bass signal through signal fusion. Signal fusion refers to the need to synthesize the two signals when a single power amplifier simultaneously drives the woofer 1 and tweeter 2, as the woofer 1 and tweeter 2 play different audio frequencies. The I / V feedback module is used to provide feedback on the voltage of the woofer 1. The voice coil temperature calculation module is used to provide feedback on the voice coil temperature. The bass temperature control module is used to perform gain processing on the original audio signal using temperature gain. The amplitude module is used to obtain the amplitude and voltage transfer function of the woofer 1. The bass amplitude prediction module is used to predict the amplitude and perform gain processing on the original audio signal using amplitude gain.

[0062] The tweeter unit 2 includes a tweeter signal acquisition module, a temperature module, and a tweeter temperature control module. The tweeter signal acquisition module acquires the tweeter signal through signal fusion. The temperature module acquires the voltage-temperature transfer function of the tweeter unit 2. The tweeter temperature control module predicts the temperature of the tweeter unit 2 and uses temperature gain to perform gain processing on the original audio signal.

[0063] This protection system can protect coaxial speakers, reducing the possibility of noise and distortion, and thus improving the sound quality of the coaxial speakers.

[0064] The application also provides a coaxial speaker protection device, which comprises a main link and a plurality of branch links connected in parallel with the main link. The main link comprises a signal control module, and the input end of the signal control module is connected with the output end of the amplitude control module of the bass unit 1 and the output end of the treble temperature control module of the treble unit 2, so as to obtain the corresponding signals. The output end of the signal control module is connected with the coaxial device, i.e. the speaker. The output end of each branch link is connected with the input end of the signal control module.

[0065] At least one branch link comprises a treble temperature calculation module, as shown in the figure. Figure 3 The treble temperature calculation module is contained in the treble temperature control module, and in the remaining branch links, there are a temperature module and a heat conduction module arranged in series. The treble temperature calculation module is contained in the treble temperature control module.

[0066] At least one branch link comprises a bass temperature calculation module, as shown in the figure. Figure 4 The bass temperature calculation module is contained in the bass temperature control module, and in the remaining branch links, there are an I / V feedback module and a voice coil temperature calculation module arranged in series. The bass temperature calculation module is contained in the bass temperature control module.

[0067] At least one branch link comprises a bass amplitude prediction module, and in the remaining branch links, there are an I / V feedback module and an amplitude module arranged in series.

[0068] In a possible implementation, the temperature calculation modules of the treble unit and the bass unit comprise a thermal model function and a DC resistance calculation module. By combining the thermal model function and the DC resistance calculation module, the accuracy of temperature calculation can be improved, and the coaxial speaker can be better protected.

[0069] The application also provides a coaxial speaker protection device, which can be a combined device with stable and amplitude protection functions. The audio signal input end of the protection device is connected in series with one or more coaxial speaker protection devices, which can be the coaxial speaker protection devices mentioned above.

[0070] The embodiment of the present application provides a coaxial loudspeaker protection method, a protection system, a protection device and a protection apparatus, wherein the coaxial loudspeaker protection method comprises the following steps: temperature modeling is performed on a high pitch unit 2 to obtain a transfer function of voltage and temperature of the high pitch unit 2; temperature and amplitude modeling is performed on a low pitch unit 1 to obtain a transfer function of voltage, amplitude and temperature of the low pitch unit 1; modeling is performed on a coaxial device with the high pitch unit 2 and the low pitch unit 1 to obtain a heat conduction function between the coaxial device; the current temperature of the high pitch unit 2 is calculated according to the current voltage of the high pitch unit 2; the temperature of the low pitch unit 1 at the next moment is predicted according to the temperature information fed back by the current of the low pitch unit 1 at the last moment; the high pitch unit 2 and the low pitch unit 1 of the coaxial device are connected in series, the target gain is obtained according to the current temperature of the high pitch unit 2, the temperature of the low pitch unit 1 at the next moment, the original audio signal and the corresponding preset threshold, and the original audio signal is processed according to the target gain. The scheme provided by the present application protects the high pitch unit 2 in a feedforward manner and protects the low pitch unit 1 in a feedback manner, which can improve the sound quality of the coaxial loudspeaker, reduce the possibility of noise and distortion, and better meet the actual use requirements.

[0071] The above only describes the embodiments of the present application, and it should be pointed out that those skilled in the art can make improvements without departing from the concept of the present application, and these improvements are within the protection scope of the present application.

Claims

1. A method for protecting a coaxial loudspeaker, characterized in that, The protection methods for the coaxial loudspeaker include: Temperature modeling is performed on the tweeter to obtain the voltage-temperature transfer function of the tweeter; Temperature and amplitude modeling is performed on the bass unit to obtain the transfer functions of voltage, amplitude, and temperature of the bass unit; A model is created for the coaxial device having the tweeter and the woofer, and the thermal conductivity function between the coaxial devices is obtained. Calculate the current temperature of the tweeter unit based on its current voltage; Predict the temperature of the bass unit at the next moment based on the temperature information fed back by the current of the bass unit at the previous moment; The high-frequency unit protection and low-frequency unit protection of the coaxial device are connected in series. The target gain is obtained based on the current temperature of the high-frequency unit, the temperature of the low-frequency unit at the next moment, the original audio signal and the corresponding preset threshold. The original audio signal is then processed based on the target gain.

2. The method for protecting a coaxial loudspeaker according to claim 1, characterized in that, The voltage, amplitude, and temperature transfer functions of the bass unit are composed of the voltage and temperature transfer functions of the bass unit and the voltage and amplitude transfer functions of the bass unit connected in series.

3. The method for protecting a coaxial loudspeaker according to claim 2, characterized in that, The voltage-temperature transfer function of the bass unit is calculated using the bass unit's thermal model function, I / V feedback data, and the thermal conduction function between coaxial devices.

4. The method for protecting a coaxial loudspeaker according to claim 1, characterized in that, The voltage-temperature transfer function of the tweeter is composed of the voltage-to-temperature transfer function of the total voltage of the coaxial speaker amplifier and the tweeter voltage, the voltage-temperature transfer function of the tweeter, and the thermal conductivity function between the coaxial components, all connected in series.

5. The method for protecting a coaxial loudspeaker according to claim 4, characterized in that, The voltage-temperature transfer function of the tweeter is obtained by calculating the thermal model function and simulated power of the tweeter.

6. A protection system for a coaxial loudspeaker, applied to the protection method for the coaxial loudspeaker according to any one of claims 1 to 5, characterized in that, The protection system of the coaxial loudspeaker includes a woofer, a tweeter, a signal control module, and a heat conduction module; The signal control module is used to weight the signal gain of the bass unit and the treble unit; The heat conduction module is used to establish a heat transfer model between the tweeter and the woofer.

7. The protection system for the coaxial loudspeaker according to claim 6, characterized in that, The bass unit includes: Low-frequency signal acquisition module; I / V feedback module, the I / V feedback module is used to provide feedback on the voltage of the bass unit; A voice coil temperature calculation module, which is used to provide feedback on the temperature of the voice coil; A bass temperature control module, which is used to perform gain processing on the original audio signal through temperature gain; An amplitude module is used to obtain the amplitude and voltage transfer function of the bass unit; A bass amplitude prediction module is used to predict the amplitude and perform gain processing on the original audio signal using the amplitude gain. The tweeter unit includes: High-frequency signal acquisition module; A temperature module, which is used to obtain the voltage-temperature transfer function of the tweeter unit; A tweeter temperature control module is used to predict the temperature of the tweeter unit and perform gain processing on the original audio signal using temperature gain.

8. A protection device for a coaxial loudspeaker, applied to the protection method for the coaxial loudspeaker according to any one of claims 1 to 5, characterized in that, The protection device for the coaxial speaker includes a main link and multiple branch links connected in parallel with the main link; The main link includes a signal control module. The input of the signal control module is used to receive the original audio signal. It is also connected to the output of the amplitude control module of the bass unit and the high-frequency temperature control module of the tweeter. The output of the signal control module is connected to a coaxial device. The output of each branch link is connected to the input of the signal control module. At least one of the branch links includes a high-frequency temperature calculation module, and a temperature module and a heat conduction module are connected in series in the remaining branch links; At least one of the branch links includes a bass temperature calculation module, and an I / V feedback module and a voice coil temperature calculation module are connected in series in the remaining branch links; At least one of the said branches includes a bass amplitude prediction module, and an I / V feedback module and an amplitude module are connected in series in the remaining said branches.

9. The protective device for the coaxial loudspeaker according to claim 8, characterized in that, Both the high-frequency temperature calculation module and the low-frequency temperature calculation module include thermal model functions and DC resistance calculation modules.

10. A protective device for a coaxial loudspeaker, characterized in that, The audio signal input terminal of the protection device for the coaxial loudspeaker is connected in series with at least one protection device for the coaxial loudspeaker. The protective device for the coaxial loudspeaker is the same as the protective device for the coaxial loudspeaker according to any one of claims 8 to 9.

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