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

Abstract

The application provides a coaxial loudspeaker protection method, a coaxial loudspeaker protection system, a coaxial loudspeaker protection device and a coaxial loudspeaker protection element. The coaxial loudspeaker protection method comprises the following steps: temperature modeling is performed on a high-pitch unit to obtain a transfer function of voltage and temperature of the high-pitch unit; temperature and amplitude modeling are performed on a low-pitch unit to obtain a transfer function of voltage, amplitude and temperature of the low-pitch unit; coaxial device modeling is performed on the coaxial device with the high-pitch unit and the low-pitch unit to obtain a heat conduction function between the coaxial devices; the temperature information fed back by the current of the high-pitch unit and the low-pitch unit at the previous moment is used to predict the temperature at the next moment; the high-pitch unit protection and the low-pitch unit protection of the coaxial device are connected in series, the target gain is obtained according to the temperature at the next moment of the high-pitch unit and the low-pitch unit, 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 application protects the coaxial loudspeaker through the feedback mode.

Description

[Technical Field]

[0001] This application relates to coaxial loudspeakers, and more particularly to methods, systems, devices and components for protecting coaxial loudspeakers. [Background Technology]

[0002] Existing coaxial loudspeakers drive both the woofer and tweeter simultaneously through the same amplifier. When the loudspeaker plays high-volume, high-frequency signals, the speaker temperature gradually increases, causing the amplitude to shift and resulting in abnormalities such as noise, leading to speaker distortion.

[0003] Therefore, it is necessary to provide a protection method, protection system, protection device, and protection component for coaxial loudspeakers. [Summary of the Invention]

[0004] The purpose of this invention is to provide a method, system, device, and component for protecting a coaxial loudspeaker.

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

[0006] A method for protecting a coaxial loudspeaker, the method comprising:

[0007] Temperature modeling is performed on the tweeter to obtain the voltage-temperature transfer function of the tweeter;

[0008] Temperature and amplitude modeling is performed on the bass unit to obtain the transfer functions of voltage, amplitude, and temperature of the bass unit;

[0009] 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.

[0010] Predict the temperature of the tweeter at the next moment based on the temperature information fed back by the current of the tweeter at the previous moment;

[0011] 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;

[0012] 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 temperature of the high-frequency unit at the next moment, 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.

[0013] In one possible implementation, the voltage, amplitude, and temperature transfer functions of the bass unit are derived by concatenating the voltage and temperature transfer functions of the bass unit and the voltage and amplitude transfer functions of the bass unit.

[0014] In one possible implementation, the voltage-temperature transfer function of the bass unit is calculated by a combination of a thermal model function, I / V feedback data, and the thermal conduction function between coaxial devices.

[0015] In one possible implementation, the voltage-temperature transfer function of the tweeter is calculated by a combination of a thermal model function, I / V feedback data, and the thermal conduction function between coaxial devices.

[0016] A second aspect of the present invention provides a protection system for a coaxial loudspeaker, applicable to the protection method for a coaxial loudspeaker described in any of the preceding claims, wherein the protection system for the coaxial loudspeaker includes a woofer, a tweeter, a signal control module, and a heat conduction module;

[0017] The signal control module is used to weight the signal gain of the bass unit and the treble unit;

[0018] The heat conduction module is used to establish a heat transfer model between the tweeter and the woofer.

[0019] In one possible implementation, the bass unit includes:

[0020] Low-frequency signal acquisition module;

[0021] A bass I / V feedback module, wherein the bass I / V feedback module is used to provide feedback on the voltage of the bass unit;

[0022] A bass voice coil temperature calculation module, which is used to provide feedback on the temperature of the bass voice coil;

[0023] A bass temperature control module, which is used to perform gain processing on the original audio signal using temperature gain;

[0024] An amplitude module, which is used to obtain the transfer functions of amplitude and voltage;

[0025] An amplitude control module is used to predict the amplitude and perform gain processing on the original audio signal using amplitude gain.

[0026] In one possible implementation, the tweeter unit includes:

[0027] High-frequency signal acquisition module;

[0028] A tweeter I / V feedback module, wherein the tweeter I / V feedback module is used to provide feedback on the voltage of the tweeter unit;

[0029] A tweeter voice coil temperature calculation module, which is used to provide feedback on the temperature of the tweeter voice coil;

[0030] A high-frequency temperature control module is used to perform gain processing on the original audio signal using temperature gain.

[0031] A third aspect of the present invention provides a protection device for a coaxial loudspeaker, applied to the protection method for a coaxial loudspeaker described in any of the above claims, characterized in that the protection device for the coaxial loudspeaker includes a main link and a plurality of branch links connected in parallel with the main link;

[0032] 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 outputs of the amplitude control module, the treble temperature control module, and the bass temperature control module. The output of the signal control module is connected to a coaxial device. The output of each of the branch links is connected to the input of the signal control module.

[0033] In one possible implementation, at least one of the branch links includes a tweeter voice coil temperature calculation module, and the remaining branch links are provided with a tweeter I / V feedback module.

[0034] At least one of the branch links includes a bass voice coil temperature calculation module, and the remaining branch links are provided with a bass I / V feedback module;

[0035] At least one of the said branches includes an amplitude module, and the remaining said branches are provided with a bass I / V feedback module.

[0036] The fourth aspect of the present invention provides a protection device for a coaxial loudspeaker, wherein at least one protection device for a coaxial loudspeaker is connected in series at the audio signal input terminal of the protection device.

[0037] Wherein, the protection device for the coaxial loudspeaker is any one of the protection devices for the coaxial loudspeaker described above.

[0038] The beneficial effects of this invention are: by using feedback to protect the tweeter and woofer respectively, and by adjusting the original audio to reduce the power of the speaker, the temperature of the coaxial speaker is reduced, thereby reducing the occurrence of coaxial speaker problems. [Attached Image Description]

[0039] Figure 1 A schematic diagram of the coaxial loudspeaker provided by the present invention;

[0040] Figure 2 This is a schematic diagram of the protection system for the coaxial loudspeaker provided by the present invention.

[0041] Figure label:

[0042] 1- Tweeter unit;

[0043] 2- Bass unit.

Detailed Implementation Methods

[0044] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0045] This application 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:

[0046] 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 is a combined device with tweeter 2 and woofer 1; modeling of the coaxial device is performed to obtain the heat conduction function between the coaxial devices. Modeling is performed on the coaxial device of tweeter 2 and woofer 1. The temperature of tweeter 2 at the next moment is predicted based on the temperature information fed back from the current of tweeter 2 at the previous moment, and 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. The output terminal of tweeter 2 is connected to the input terminal of woofer 1 to connect the 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%.

[0047] In the method provided by the present invention, the tweeter 2 and the woofer 1 can be protected by feedback. The original audio signal is adjusted according to the target gain to reduce the load on the speaker, thereby reducing the possibility of the coaxial speaker overheating, thus protecting the coaxial speaker, reducing noise, and reducing the possibility of distortion in the coaxial speaker.

[0048] In one possible implementation, the transfer functions of voltage, amplitude, and temperature of bass unit 1 are the overall transfer functions of bass unit 1 protection. The overall transfer functions of bass unit 1 protection are obtained by connecting the transfer functions of bass unit 1 voltage and temperature, and the transfer functions of bass unit 1 voltage and amplitude in series.

[0049] By integrating the data of the bass unit 1 through a corresponding algorithm, the transfer functions of the voltage, amplitude and temperature of the bass unit 1 are obtained, so that the bass unit 1 can be better protected through feedback.

[0050] In one possible implementation, the voltage-temperature transfer function of the bass unit 1 is calculated by a combination of a thermal model function, I / V feedback data, and the thermal conduction function between coaxial devices.

[0051] By calculating the relevant data, the voltage and temperature transfer function of the bass unit 1 can be obtained, which facilitates the protection of the bass unit 1.

[0052] In one possible implementation, the voltage-temperature transfer function of the tweeter 2 is calculated by a combination of a thermal model function, I / V feedback data, and the thermal conduction function between coaxial devices.

[0053] By integrating the data of tweeter 2 through a corresponding algorithm, the voltage and temperature transfer function of tweeter 2 can be obtained, thereby enabling the tweeter 2 to be protected through feedback.

[0054] like Figure 2 As 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.

[0055] 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.

[0056] like Figure 2As shown, in one possible implementation, the bass unit 1 includes a bass signal acquisition module, a bass I / V feedback module, a bass voice coil temperature calculation module, a bass temperature control module, an amplitude module, and an 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 bass unit 1 and the tweeter 2, as they play different audio frequencies. The bass I / V feedback module provides feedback on the voltage of the bass unit 1. The bass voice coil temperature calculation module provides feedback on the temperature of the bass voice coil. The bass temperature control module uses temperature gain to perform gain processing on the original audio signal to protect the temperature of the bass unit 1. The amplitude module obtains the transfer functions of amplitude and voltage. The amplitude control module predicts the amplitude and uses amplitude gain to perform gain processing on the original audio signal to protect the amplitude of the bass unit 1.

[0057] The tweeter unit 2 includes a tweeter signal acquisition module, a tweeter I / V feedback module, a tweeter voice coil temperature calculation module, and a tweeter temperature control module. The tweeter signal acquisition module acquires the tweeter signal through signal fusion. The tweeter I / V feedback module provides feedback on the speaker voltage. The tweeter voice coil temperature calculation module provides feedback on the tweeter voice coil temperature. The tweeter temperature control module performs gain processing on the original audio signal using temperature gain to protect the speaker's temperature.

[0058] This protection system can protect coaxial speakers, reducing the possibility of noise and distortion, and thus improving the sound quality of the coaxial speakers.

[0059] This invention also provides a protection device for a coaxial loudspeaker, comprising a main link and multiple branch links connected in parallel with the main link. The main link includes a signal control module, whose input terminal is used to receive the raw audio signal. Simultaneously, the input terminal of the signal control module is also connected to the output terminals of an amplitude control module, a treble temperature control module, and a bass temperature control module to acquire the corresponding signals. The output terminal of the signal control module is connected to the coaxial device, i.e., to the loudspeaker. The output terminals of each branch link are connected to the input terminal of the signal control module.

[0060] At least one branch includes a tweeter voice coil temperature calculation module, and the remaining branches have tweeter I / V feedback modules.

[0061] At least one branch includes a bass voice coil temperature calculation module, and the remaining branches have bass I / V feedback modules.

[0062] At least one branch includes an amplitude module, and the remaining branches have a bass I / V feedback module.

[0063] The present invention also provides a protection device for a coaxial loudspeaker, which can be a combination device with stabilization and amplitude protection functions. One or more protection devices for coaxial loudspeakers are connected in series at the audio signal input terminal of the protection device, and the protection devices for coaxial loudspeakers can be the coaxial loudspeaker protection devices described above.

[0064] This invention provides a protection method, system, device, and component for a coaxial loudspeaker. The protection method includes: temperature modeling of the tweeter 2 to obtain the voltage-temperature transfer function of the tweeter 2; temperature and amplitude modeling of the woofer 1 to obtain the voltage, amplitude, and temperature transfer functions of the woofer 1; modeling the coaxial device with the tweeter 2 and woofer 1 to obtain the heat conduction function between the coaxial device; predicting the temperature of the tweeter 2 at the next moment based on the temperature information fed back from the current of the tweeter 2 at the previous moment; predicting the temperature of the woofer 1 at the next moment based on the temperature information fed back from the current of the woofer 1 at the previous moment; connecting the tweeter protection and woofer protection of the coaxial device in series; obtaining a target gain based on the next moment's temperature of the tweeter 2 and woofer 1, the original audio signal, and a corresponding preset threshold; and processing the original audio signal based on the target gain. The solution provided by this invention protects the tweeter 2 and woofer 1 through feedback, which can improve the sound quality of the coaxial loudspeaker, reduce the possibility of noise and distortion, and better meet practical usage needs.

[0065] 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 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. Predict the temperature of the tweeter at the next moment based on the temperature information fed back by the current of the tweeter at the previous moment; 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 temperature of the high-frequency unit at the next moment, 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 formed by connecting the voltage and temperature transfer functions of the bass unit and the voltage and amplitude transfer functions of the bass unit 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 by combining the 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 calculated by combining the thermal model function, I / V feedback data, and the thermal conduction function between coaxial devices.

5. A protection system for a coaxial loudspeaker, applied to the protection method for the coaxial loudspeaker according to any one of claims 1 to 4, 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.

6. The protection system for the coaxial loudspeaker according to claim 5, characterized in that, The bass unit includes: Low-frequency signal acquisition module; A bass I / V feedback module, wherein the bass I / V feedback module is used to provide feedback on the voltage of the bass unit; A bass voice coil temperature calculation module, which is used to provide feedback on the temperature of the bass voice coil; A bass temperature control module, which is used to perform gain processing on the original audio signal using temperature gain; An amplitude module, which is used to obtain the transfer functions of amplitude and voltage; An amplitude control module is used to predict the amplitude and perform gain processing on the original audio signal using amplitude gain.

7. The protection system for the coaxial loudspeaker according to claim 5, characterized in that, The tweeter unit includes: High-frequency signal acquisition module; A tweeter I / V feedback module, wherein the tweeter I / V feedback module is used to provide feedback on the voltage of the tweeter unit; A tweeter voice coil temperature calculation module, which is used to provide feedback on the temperature of the tweeter voice coil; A high-frequency temperature control module is used to 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 4, 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, the treble temperature control module, and the bass temperature control module. The output of the signal control module is connected to a coaxial device. The output of each of the branch links is connected to the input of the signal control module.

9. The protective device for the coaxial loudspeaker according to claim 8, characterized in that, In each of the branch links, at least one branch link includes a tweeter voice coil temperature calculation module, and the remaining branch links are provided with a tweeter I / V feedback module; At least one of the branch links includes a bass voice coil temperature calculation module, and the remaining branch links are provided with a bass I / V feedback module; At least one of the said branches includes an amplitude module, and DD230684I is provided in the remaining said branches. It has a bass I / V feedback module.

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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