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 coaxial loudspeaker protection method comprises the following steps: temperature modeling of a high-pitch unit to obtain a transfer function of voltage and temperature of the high-pitch unit; temperature and amplitude modeling of a low-pitch unit to obtain a transfer function of voltage, amplitude and temperature of the low-pitch unit; modeling of a coaxial device with the high-pitch unit and the low-pitch unit to obtain a heat conduction function between the coaxial device; current temperature calculation according to a current voltage of the high-pitch unit; current temperature calculation according to a current voltage of the low-pitch unit; series connection of high-pitch unit protection and low-pitch unit protection of the coaxial device; target gain acquisition according to current temperatures of the high-pitch unit and the low-pitch unit, an original audio signal and corresponding preset thresholds; and original audio signal processing according to the target gain. The scheme provided by the application protects the high-pitch unit and the low-pitch unit in a feedforward manner, and improves sound production quality.

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] According to the current voltage of the treble unit, the current temperature of the treble unit is calculated;

[0011] According to the current voltage of the bass unit, the current temperature of the bass unit is calculated;

[0012] The treble unit protection and the 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 current temperature of the bass unit, 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 connected in series by 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.

[0014] ​​​In a possible implementation, the transfer function between the voltage and the temperature of the bass unit is composed in series of a thermal model function of the bass unit and a thermal conduction function between the coaxial device.

[0015] In a possible implementation, the transfer function between the voltage and the temperature of the tweeter unit is composed in series of a transfer function of the total voltage of the power amplifier of the coaxial speaker and the voltage of the tweeter unit, a thermal model function of the tweeter unit and a thermal conduction function between the coaxial device.

[0016] 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, the protection system of the coaxial speaker comprising a bass unit, a tweeter unit, a signal control module and a thermal conduction module.

[0017] The signal control module is configured to weight the signal gain of the bass unit and the signal gain of the tweeter unit.

[0018] The thermal conduction module is configured to establish a heat transfer model between the tweeter unit and the bass unit.

[0019] In a possible implementation, the bass unit comprises:

[0020] a bass signal acquisition module;

[0021] a bass temperature module configured to acquire a transfer function between the voltage and the temperature of the bass unit;

[0022] a bass temperature control module configured to predict the temperature of the bass unit and perform gain processing on the original audio signal by using a temperature gain;

[0023] an amplitude module configured to acquire a transfer function between the amplitude and the voltage;

[0024] an amplitude prediction module configured to predict the amplitude;

[0025] an amplitude compression module configured to perform gain processing on the original audio signal by using an amplitude gain.

[0026] In a possible implementation, the tweeter unit comprises:

[0027] a tweeter signal acquisition module;

[0028] a tweeter temperature module configured to acquire a transfer function between the voltage and the temperature of the tweeter unit;

[0029] A high pitch temperature control module is used to predict the temperature of the high pitch unit and facilitate temperature gain to process the original audio signal.

[0030] The third aspect of the present application provides a coaxial speaker protection device, applied to the coaxial speaker protection method of any one of the above, the coaxial speaker protection device comprising a main link and a plurality of branch links connected in parallel with the main link;

[0031] The main link comprises a signal control module, the input end of the signal control module is used to receive the original audio signal, and the output end of the signal control module is connected with the amplitude control module of the bass unit, the bass temperature control module and the high pitch temperature control module, and the output end of the signal control module is connected with the coaxial device, and the output end of each branch link is connected with the input end of the signal control module.

[0032] In a possible implementation, at least one of the branch links comprises a high pitch temperature module;

[0033] At least one of the branch links comprises a bass temperature module;

[0034] At least one of the branch links comprises a heat conduction module;

[0035] At least one of the branch links comprises an amplitude module.

[0036] The fourth aspect of the present application provides a coaxial speaker protection device, and at least one coaxial speaker protection device is connected in series at the audio signal input end of the coaxial speaker protection device;

[0037] The coaxial speaker protection device is the coaxial speaker protection device of any one of the above.

[0038] The present application has the beneficial effects that the high pitch unit and the bass unit are protected by the feedforward mode, the original audio is adjusted to reduce the power of the speaker, thereby reducing the temperature of the coaxial speaker, and reducing the possibility of distortion and noise of the coaxial speaker. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The coaxial speaker provided by the present application is shown in the schematic diagram;

[0040] Figure 2 The protection system of the coaxial speaker provided by the present application is shown in the schematic diagram;

[0041] Figure 3 The amplitude control module provided by the present application is shown in the schematic diagram.

[0042] Reference signs:

[0043] 1 - bass unit;

[0044] 2 - tweeter unit.

DETAILED DESCRIPTION

[0045] The application will be further described below in conjunction with the accompanying drawings and embodiments.

[0046] The application provides a protection method for a coaxial loudspeaker, as shown in the figure, the coaxial loudspeaker can be a loudspeaker driven by a single power amplifier (PA) to drive the bass unit 1 and the tweeter unit 2, the protection method for the coaxial loudspeaker comprises: Figure 1

[0047] The voltage and temperature transfer function of the tweeter unit 2 is obtained by modeling the temperature of the tweeter unit 2. The voltage, amplitude and temperature transfer function of the bass unit 1 is obtained by modeling the temperature and amplitude of the bass unit 1. The coaxial device is a two-in-one device with the tweeter unit 2 and the bass unit 1, and the heat conduction function between the coaxial devices is obtained by modeling the coaxial devices. The coaxial devices of the tweeter unit 2 and the bass unit 1 are modeled. The current temperature of the tweeter unit 2 is calculated according to the current voltage of the tweeter unit 2, and the temperature of the tweeter unit 2 is fed forward. The current temperature of the bass unit 1 is calculated according to the current voltage of the bass unit 1, and the temperature of the bass unit 1 is fed forward. The output end of the tweeter unit 2 is connected to the input end of the bass unit 1, so that the tweeter unit protection and the bass unit protection are connected in series. The target gain is obtained according to 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 loudspeaker, and the target gain is the gain that is wanted to obtain. For example, when the preset threshold of the coaxial loudspeaker is 100 degrees and the temperature of the coaxial loudspeaker is predicted to reach 200 degrees, 70% of the original audio signal needs to be compressed, and the target gain is 70%.

[0048] In the mode provided by the application, the tweeter unit 2 and the bass unit 1 can be protected by feedforward, the original audio signal is adjusted according to the target gain to reduce the load of the loudspeaker, so that the temperature of the coaxial loudspeaker can be reduced, thereby protecting the coaxial loudspeaker, reducing noise and reducing the possibility of distortion of the coaxial loudspeaker.

[0049] In a possible implementation, the voltage, amplitude and temperature transfer function 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 voltage and temperature transfer function of the bass unit 1 and the voltage and amplitude transfer function of the bass unit 1 in series.

[0050] ​The data of the bass unit 1 is integrated through 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 through feedforward.

[0051] In a possible implementation, the transfer function between the voltage and the temperature of the bass unit 1 is in series with a heat conduction function between the thermal model function of the bass unit 1 and the coaxial device.

[0052] The temperature transfer function of the bass unit 1 can be obtained through calculation on the corresponding data, so that the bass unit 1 can be protected.

[0053] In a possible implementation, the transfer function between the voltage and the temperature of the bass unit 1 is in series with a heat conduction function between the thermal model function of the bass unit 1 and the coaxial device.

[0054] The data of the bass unit 1 is integrated through 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 through feedforward.

[0055] As shown in Figure 2 The present application also provides a protection system for a coaxial loudspeaker, which can be applied to the protection method for the coaxial loudspeaker. The protection system for the coaxial loudspeaker comprises a bass unit 1, a treble unit 2, a signal control unit and a heat conduction module. The heat conduction module is used to establish a heat transfer model between the bass unit 1 and the treble unit 2, and the signal control module is used to weight the signal gain of the bass unit 1 and the treble unit 2.

[0056] The heat transfer model between the bass unit 1 and the treble unit 2 is established through the heat conduction module to obtain the heat conduction coefficient between the coaxial device, so that the coaxial loudspeaker can be better protected. The signal control module dynamically adjusts the gain of the bass unit 1 and the treble unit 2 through a corresponding algorithm to better protect the coaxial loudspeaker and achieve the purpose of improving the sound quality.

[0057] As shown in Figure 2 In a possible implementation, the bass unit 1 comprises a bass signal acquisition module, a bass temperature module, a bass temperature control module, an amplitude module and an amplitude control module, wherein, as shown in Figure 3As shown, the amplitude control module comprises an amplitude prediction module and an amplitude compression module. The bass signal acquisition module acquires the bass signal through signal fusion. Signal fusion refers to the need to synthesize two signals when a single power amplifier area simultaneously drives the bass unit 1 and the treble unit 2 due to the difference in audio played by the bass unit 1 and the treble unit 2 and the difference in frequency band. The bass temperature module is used to acquire the transfer function of the voltage and temperature of the bass unit 1. The bass temperature control module is used to predict the temperature of the bass speaker and facilitate gain processing of the original audio signal by the temperature gain to achieve temperature protection of the bass unit 1. The amplitude module is used to acquire the transfer function of the amplitude and voltage. The amplitude control module can include an amplitude prediction module and an amplitude compression module, the amplitude prediction module is used to predict the amplitude. The amplitude compression module is used to process the original audio signal by the amplitude gain to achieve amplitude protection of the speaker.

[0058] The treble unit 2 comprises a treble signal acquisition module, a treble temperature module and a treble temperature control module. The treble signal acquisition module is used to acquire the treble signal through signal fusion. The treble temperature module is used to acquire the transfer function of the voltage and temperature of the treble unit 2. The treble temperature control module is used to predict the temperature of the treble unit 2 and perform gain processing of the original audio signal by the temperature gain to protect the temperature of the treble unit 2.

[0059] The protection system can protect the coaxial speaker, reduce the possibility of noise and distortion of the coaxial speaker, and improve the sound quality of the coaxial speaker.

[0060] The application also provides a protection device for a coaxial speaker, 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, the input end of the signal control module is used to receive an original audio signal, and at the same time, the input end of the signal control module is also connected with the output end of the amplitude control module of the bass unit 1, the bass temperature control module and the output end of the treble temperature control module, so as to acquire corresponding signals. The output end of the signal control module is connected with the coaxial device, i.e. connected with the speaker. The output end of each branch link is connected with the input end of the signal control module.

[0061] At least one branch link comprises a treble temperature module.

[0062] At least one branch link comprises a bass temperature module.

[0063] At least one branch link comprises a heat conduction module.

[0064] At least one branch link comprises an amplitude module.

[0065] The application further provides a protection device for a coaxial loudspeaker, which can be a combined device with stable and amplitude protection functions.

[0066] The embodiment of the application provides a protection method, a protection system, a protection device and a protection device for a coaxial loudspeaker, wherein the protection method for the coaxial loudspeaker 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 are 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; a current temperature of the high-pitch unit 2 is calculated according to a current voltage of the high-pitch unit 2; a current temperature of the low-pitch unit 1 is calculated according to a current voltage of the low-pitch unit 1; the high-pitch unit 2 and the low-pitch unit 1 of the coaxial device are connected in series, a target gain is obtained according to the current temperatures of the high-pitch unit 2 and the low-pitch unit 1, an original audio signal and a corresponding preset threshold value, and the original audio signal is processed according to the target gain. The scheme provided by the application protects the high-pitch unit 2 and the low-pitch unit 1 in a feedforward manner, can be beneficial to improving sound quality of the coaxial loudspeaker, reducing the possibility of noise and distortion, and is more in line with actual use requirements.

[0067] The above only describes the embodiments of the application, and it should be noted that those skilled in the art can make improvements without departing from the concept of the application, and these improvements are within the protection scope of the application.

Claims

1. A method of protecting a coaxial loudspeaker, characterized by, The protection method of the coaxial speaker comprises the following steps: temperature modeling is performed on the high-frequency unit to obtain a transfer function of voltage and temperature of the high-frequency unit; temperature and amplitude modeling is performed on the low-frequency unit to obtain a transfer function of voltage, amplitude and temperature of the low-frequency unit; coaxial device modeling is performed on the coaxial device with the high-frequency unit and the low-frequency unit to obtain a heat conduction function between the coaxial devices; a current temperature of the high-frequency unit is calculated according to a current voltage of the high-frequency unit; a current temperature of the low-frequency unit is calculated according to a current voltage of the low-frequency unit; the high-frequency unit protection and the low-frequency unit protection of the coaxial device are connected in series, a target gain is obtained according to the current temperature of the high-frequency unit, the current temperature of the low-frequency unit, an original audio signal and a corresponding preset threshold, and the original audio signal is processed according to the target gain.

2. The method of protecting a coaxial loudspeaker according to claim 1, wherein, The transfer function of voltage, amplitude and temperature of the low-frequency unit is obtained by connecting the transfer function of voltage and temperature of the low-frequency unit and the transfer function of voltage and amplitude of the low-frequency unit in series.

3. The method of protecting a coaxial loudspeaker of claim 2, wherein, The transfer function between the voltage and the temperature of the low-frequency unit is obtained by connecting the thermal model function of the low-frequency unit and the heat conduction function between the coaxial devices.

4. The method of protecting a coaxial loudspeaker of claim 1, wherein, The transfer function between the voltage and the temperature of the high-frequency unit is obtained by connecting the total voltage and the high-frequency unit voltage transfer function of the power amplifier of the coaxial speaker, the thermal model function of the high-frequency unit and the heat conduction function between the coaxial devices.

5. A protection system for a coaxial speaker, applied to the protection method for a coaxial speaker according to any one of claims 1 to 4, characterized in that, The protection system of the coaxial speaker comprises a low-frequency unit, a high-frequency unit, a signal control module and a heat conduction module. The signal control module is used to weight the signal gain of the low-frequency unit and the high-frequency unit. The heat conduction module is used to establish a heat transfer model between the high-frequency unit and the low-frequency unit.

6. A protection system for a coaxial loudspeaker according to claim 5, characterised in that, The low-frequency unit comprises: a low-frequency signal acquisition module; a low-frequency temperature module used to obtain the transfer function between the voltage and the temperature of the low-frequency unit; a low-frequency temperature control module used to predict the temperature of the low-frequency unit and perform gain processing on the original audio signal by using the temperature gain; an amplitude module used to obtain the transfer function of amplitude and voltage; an amplitude prediction module used to predict the amplitude; an amplitude compression module used to perform gain processing on the original audio signal by using the amplitude gain.

7. The protection system for a coaxial loudspeaker of claim 5, wherein, The high-frequency unit comprises: a high-frequency signal acquisition module; a high-frequency temperature module used to obtain the transfer function of voltage and temperature of the high-frequency unit; a high-frequency temperature control module used to predict the temperature of the high-frequency unit and perform gain processing on the original audio signal by using the temperature gain.

8. A protection device for a coaxial speaker, applied to the protection method for the coaxial speaker according to any one of claims 1 to 4, characterized in that, The protection device of the coaxial speaker comprises a main link and a plurality of branch links connected in parallel with the main link; The main link includes a signal control module, the input end of the signal control module is used to receive the original audio signal, and is also connected to the output ends of the amplitude control module, bass temperature control module, and treble temperature control module of the woofer. The output end of the signal control module is connected to the coaxial device, and the output end of each branch link is connected to the input end of the signal control module.

9. A protection device for a coaxial loudspeaker according to claim 8, characterized in that At least one of the branch links includes a treble temperature module; At least one of said branch links comprises a bass temperature module; At least one of the branch links comprises a heat transfer module At least one of the branch links comprises an amplitude module.

10. A protection device for a coaxial loudspeaker, characterized in that The audio signal input end of the protection device of the coaxial speaker is provided with at least one coaxial speaker protection device in series; Wherein, the coaxial loudspeaker protection device is the coaxial loudspeaker protection device according to any one of claims 8 to 9.

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