CN116437264A - Protection method, protection system, protection device and protection device for coaxial loudspeaker - Google Patents
Protection method, protection system, protection device and protection device for coaxial loudspeaker Download PDFInfo
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- CN116437264A CN116437264A CN202310354455.2A CN202310354455A CN116437264A CN 116437264 A CN116437264 A CN 116437264A CN 202310354455 A CN202310354455 A CN 202310354455A CN 116437264 A CN116437264 A CN 116437264A
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- 230000005236 sound signal Effects 0.000 claims abstract description 27
- 238000004364 calculation method Methods 0.000 claims description 26
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- 230000009286 beneficial effect Effects 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a protection method, a protection system, a protection device and a protection device of a coaxial loudspeaker. The protection method comprises the steps of carrying out temperature modeling on a high-pitch unit to obtain a transfer function of voltage and temperature of the high-pitch unit; modeling the temperature and the amplitude of the bass unit to obtain the transfer functions of the voltage, the amplitude and the temperature of the bass unit; modeling the coaxial devices with the high-pitch unit and the low-pitch unit, and obtaining a heat conduction function between the coaxial devices; calculating the current temperature of the high-pitched unit according to the current voltage of the high-pitched unit; predicting the temperature of the bass unit at the next moment according to the temperature information fed back by the current of the bass unit at the next moment; the high-pitch unit and the low-pitch unit of the coaxial device are connected in series, a target gain is obtained according to the current temperature of the high-pitch unit, the temperature of the low-pitch unit at the next moment, an original audio signal and a corresponding preset threshold value, and the original audio signal is processed according to the target gain. The invention can protect the coaxial loudspeaker.
Description
[ field of technology ]
The present invention relates to a coaxial speaker, and more particularly, to a protection method, a protection system, a protection device, and a protection device for a coaxial speaker.
[ background Art ]
The coaxial loudspeaker in the prior art drives the bass unit and the treble unit simultaneously through the same power amplifier, when the loudspeaker plays high-loudness, high-frequency and other large signals, the temperature of the loudspeaker gradually rises, so that the amplitude is deviated, and abnormal conditions such as noise and the like are further caused, so that the loudspeaker is distorted.
Therefore, it is necessary to provide a protection method, a protection system, a protection device and a protection device for a coaxial speaker.
[ invention ]
The invention aims to provide a protection method, a protection system, a protection device and a protection device of a coaxial loudspeaker.
The technical scheme of the invention is as follows:
a method of protecting a coaxial speaker, the method comprising:
modeling the temperature of a high-pitched unit, and obtaining a transfer function of the voltage and the temperature of the high-pitched unit;
modeling the temperature and the amplitude of a bass unit, and obtaining the transfer function of the voltage, the amplitude and the temperature of the bass unit;
modeling the coaxial devices with the high-pitched unit and the low-pitched unit, and obtaining a heat conduction function between the coaxial devices;
calculating the current temperature of the high-pitched unit according to the current voltage of the high-pitched unit;
predicting the temperature of the bass unit at the next moment according to the temperature information fed back by the current of the bass unit at the previous moment;
and the high-pitch unit protection and the low-pitch unit protection of the coaxial device are connected in series, a target gain is obtained according to the current temperature of the high-pitch unit, the temperature of the low-pitch unit at the next moment, an original audio signal and a corresponding preset threshold value, and the original audio signal is processed according to the target gain.
In one possible embodiment, the transfer function of the voltage, amplitude and temperature of the bass unit consists of a transfer function of the voltage and temperature of the bass unit and a transfer function of the voltage and amplitude of the bass unit in series.
In one possible embodiment, the transfer function of the voltage and temperature of the bass unit is calculated from the thermal model function of the bass unit, the I/V feedback data and the thermal transfer function between the coaxial devices.
In one possible embodiment, the transfer function of the voltage and the temperature of the tweeter unit is composed of a transfer function of the total voltage and the tweeter unit voltage of the power amplifier of the coaxial speaker, a transfer function of the voltage and the temperature of the tweeter unit, and a thermal transfer function between coaxial devices in series.
In one possible implementation, the transfer function of the voltage and temperature of the treble unit is obtained by calculation of a thermal model function and a simulated power of the treble unit.
A second aspect of the present invention provides a protection system for a coaxial speaker, which is applied to the protection method for a coaxial speaker described in any one of the above, the protection system for a coaxial speaker including a bass unit, a treble unit, a signal control module, and a heat conduction module;
the signal control module is used for weighting the signal gains of the bass unit and the treble unit;
the heat conduction module is used for establishing a heat transfer model between the high-pitched unit and the low-pitched unit.
In one possible embodiment, the bass unit includes:
a bass signal acquisition module;
the I/V feedback module is used for feeding back the voltage of the bass unit;
the voice coil temperature calculation module is used for feeding back the temperature of the voice coil;
the low-tone temperature control module is used for performing gain processing on the original audio signal through temperature gain;
the amplitude module is used for acquiring the transfer function of the amplitude and the voltage of the bass unit;
a bass amplitude prediction module for predicting the amplitude and performing gain processing on the original audio signal using the amplitude gain;
the treble unit includes:
a high-pitch signal acquisition module;
the temperature module is used for acquiring a transfer function of the voltage and the temperature of the high-pitched unit;
and the high-pitch temperature control module is used for predicting the temperature of the high-pitch unit and performing gain processing on the original audio signal by utilizing the temperature gain.
The third aspect of the present invention provides a protection device for a coaxial speaker, which is applied to the protection method for a coaxial speaker described in any one of the above, and the protection device for a coaxial speaker includes a main link and a plurality of branched links connected in parallel with the main link;
the main link comprises a signal control module, wherein the input end of the signal control module is used for receiving an original audio signal and is also connected with the output ends of an amplitude control module of a bass unit and a treble temperature control module of a treble unit, the output end of the signal control module is connected with a coaxial device, and the output end of each branch link is connected with the input end of the signal control module;
at least one branched path comprises a high-pitch temperature calculation module, and a temperature module and a heat conduction module are arranged in the rest branched paths in series;
at least one branched path comprises a bass temperature calculation module, and I/V feedback modules and voice coil temperature calculation modules are arranged in the rest branched paths in series;
at least one branched path comprises a bass amplitude prediction module, and I/V feedback modules and amplitude modules are arranged in the rest branched paths in series.
In one possible implementation, the high-pitch temperature calculation module and the low-pitch temperature calculation module each include a thermal model function and a direct current resistance calculation module.
A fourth aspect of the present invention provides a protection device for a coaxial speaker, wherein an audio signal input end of the protection device for a coaxial speaker is provided with at least one protection device for a coaxial speaker in series;
wherein the protection device of the coaxial loudspeaker is any one of the protection devices of the coaxial loudspeaker.
The invention has the beneficial effects that: the high-pitch unit is protected in a feedforward mode, the low-pitch unit is protected in a feedback mode, and the original audio frequency is adjusted to reduce the power of the loudspeaker, so that the temperature of the coaxial loudspeaker is reduced, and the possibility of distortion and noise of the coaxial loudspeaker is reduced.
[ description of the drawings ]
Fig. 1 is a schematic diagram of a coaxial speaker according to the present invention;
fig. 2 is a schematic diagram of a protection system of a coaxial speaker according to the present invention;
FIG. 3 is a schematic diagram of a high-pitched sound temperature control module according to the present invention;
fig. 4 is a schematic diagram of a bass temperature control module provided by the present invention.
Reference numerals
1-bass units;
2-high pitch unit.
[ detailed description ] of the invention
The invention will be further described with reference to the drawings and embodiments.
The embodiment of the invention provides a protection method for a coaxial speaker, as shown in fig. 1, where the coaxial speaker may be a speaker that drives a bass unit 1 and a treble unit 2 simultaneously through a single Power Amplifier (PA), and the protection method for the coaxial speaker includes:
and (3) carrying out temperature modeling on the high-pitch unit 2, and obtaining a transfer function of voltage and temperature of the high-pitch unit 2. The temperature and amplitude modeling is performed on the bass unit 1, and the transfer function of the voltage, amplitude and temperature of the bass unit 1 is obtained. The coaxial device is a two-in-one device with a high-pitch unit 2 and a low-pitch unit 1, and the coaxial device is modeled to obtain a heat transfer function between the coaxial devices. Modeling is performed based on the coaxial devices of the treble unit 2 and the bass unit 1. The present temperature of the treble unit 2 is calculated from the present voltage of the treble unit 2, and the temperature of the treble unit 2 is fed forward. The temperature of the bass unit 1 at the next moment is predicted according to the temperature information fed back by the current of the bass unit 1 at the previous moment, so as to feed back the temperature information of the bass unit 1. The output of the treble unit 2 is connected to the input of the bass unit 1 such that the treble unit protection is connected in series with the bass unit protection. And obtaining a target gain according to the original audio signal and a corresponding preset threshold value, and processing the original audio signal according to the target gain. The preset threshold is the maximum temperature of the coaxial speaker and the target gain is the gain desired to be obtained. For example, when the preset threshold of the coaxial speaker is 100 degrees and the temperature of the coaxial speaker is predicted to reach 200 degrees, the original audio signal needs to be compressed by 70%, and the target gain is 70%.
In the mode provided by the invention, the current of the bass unit 1 can be monitored, the bass unit 1 can be protected in a feedback mode, the feedforward temperature protection is carried out on the treble unit 2, and the original audio signal is regulated according to the target gain so as to reduce the load of the loudspeaker, thereby reducing the possibility of overhigh temperature of the coaxial loudspeaker, protecting the coaxial loudspeaker, reducing noise and reducing the possibility of distortion of the coaxial loudspeaker.
In one possible embodiment, 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 in series with the transfer function of the voltage and amplitude of the bass unit 1.
The data of the bass unit 1 are integrated through a corresponding algorithm, and a transfer function of the voltage, the amplitude and the temperature of the bass unit 1 is obtained, so that the bass unit 1 can be better protected in a feedback mode.
In one possible embodiment, the transfer function of the voltage and temperature of the bass unit 1 is obtained by calculation of the thermal model function of the bass unit, the I/V feedback data and the thermal transfer function between the coaxial devices.
By calculating the corresponding data, a transfer function of the voltage and the temperature of the bass unit 1 can be obtained, thereby facilitating the protection of the bass unit 1.
In one possible embodiment, the transfer function of the voltage and temperature of the tweeter unit 2 is composed of a transfer function of the total voltage of the power amplifier of the coaxial speaker and the voltage of the tweeter unit 2, a transfer function of the voltage and temperature of the tweeter unit 2, and a thermal transfer function between the coaxial devices in series.
The data of the high-pitch unit 2 are integrated through a corresponding algorithm to obtain a transfer function of the voltage and the temperature of the high-pitch unit 2, so that the high-pitch unit 2 can be protected in a feedforward mode.
In one possible implementation, the transfer function of the voltage and temperature of the treble unit 2 is obtained by calculation of the thermal model function and the simulated power of the treble unit.
In this way, the transfer function of the voltage and temperature of the treble unit 2 can be obtained.
As shown in fig. 2, the present invention also provides a protection system for a coaxial speaker, which can be applied to the protection method for a coaxial speaker as referred to above. The protection system of 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 for establishing a heat transfer model between the high-pitched unit 2 and the low-pitched unit 1, and the signal control module is used for weighting the signal gains of the low-pitched unit 1 and the high-pitched unit 2.
The heat transfer model between the high-pitch unit 2 and the low-pitch unit 1 is built through the heat transfer module to obtain the heat transfer coefficient between the coaxial devices, so that the coaxial speakers can be better protected. The signal control module dynamically adjusts the gains of the bass unit 1 and the treble unit 2 through corresponding algorithms so as to better protect the coaxial loudspeaker and achieve the purpose of improving the tone quality.
As shown in fig. 2, in one possible embodiment, the bass unit 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 a bass signal through signal fusion. The signal fusion means that two signals need to be synthesized when a single power amplification area drives the bass unit 1 and the treble unit 2 simultaneously because the bass unit 1 and the treble unit 2 play different audios and different frequency bands. The I/V feedback module is used for feeding back the voltage of the bass unit 1. The voice coil temperature calculation module is used for feeding back the temperature of the voice coil. The bass temperature control module is used for performing gain processing on the original audio signal through temperature gain. The amplitude module is used for acquiring the transfer function of the amplitude and the voltage of the bass unit 1. The bass amplitude prediction module is used for predicting the amplitude and performing gain processing on the original audio signal by using the amplitude gain.
The treble unit 2 includes a treble signal acquisition module, a temperature module, and a treble temperature control module. The high-pitch signal acquisition module is used for acquiring high-pitch signals through signal fusion. The temperature module is used for acquiring a transfer function of the voltage and the temperature of the treble unit 2. The high-pitch temperature control module is used for predicting the temperature of the high-pitch unit 2 and performing gain processing on the original audio signal by utilizing the temperature gain.
The protection system can protect the coaxial loudspeaker, reduce the possibility of noise, distortion and other conditions of the coaxial loudspeaker, and is beneficial to improving the sounding quality of the coaxial loudspeaker.
The invention also provides a protection device of the coaxial loudspeaker, which comprises a main link and a plurality of branch links connected with the main link in parallel. The main link comprises a signal control module, the short-term of which is used for receiving the original audio signal, and meanwhile, 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 and the output end of the treble temperature control module of the treble unit 2 so as to obtain corresponding signals. The output end of the signal control module is connected with the coaxial device, namely connected with the loudspeaker. The output end of each link is connected with the input end of the signal control module.
At least one branch path comprises a high-pitch temperature calculation module, as shown in fig. 3, the high-pitch temperature calculation module is contained in the high-pitch temperature control module, and the rest branch paths are provided with temperature modules and heat conduction modules which are arranged in series. The high-pitch temperature calculating module is contained in the high-pitch temperature control module.
At least one branch path comprises a bass temperature calculation module, as shown in fig. 4, the bass temperature calculation module is contained in the bass temperature control module, and the rest branch paths are provided with an I/V feedback module and a voice coil temperature calculation module which are arranged in series. The bass temperature calculation module is included in the bass temperature control module.
At least one branch path comprises a bass amplitude prediction module, and I/V feedback modules and amplitude modules are arranged in series in the rest branch links.
In one possible embodiment, the temperature calculation modules of the treble unit and the bass unit comprise a thermal model function and a direct current resistance calculation module. The accuracy of temperature calculation can be improved by combining the thermal model function with the direct current resistance calculation module, and the coaxial loudspeaker can be better protected.
The invention also provides a protection device for a coaxial loudspeaker, which may be a combined device with a robust and amplitude protection function. The audio signal input end of the protection device is provided with one or more protection devices of the coaxial speakers in series, and the protection devices of the coaxial speakers can be the protection devices of the coaxial speakers.
The embodiment of the invention 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 steps of modeling the temperature of a high-pitched unit 2 and obtaining a transfer function of the voltage and the temperature of the high-pitched unit 2; modeling the temperature and the amplitude of the bass unit 1, and obtaining the transfer function of the voltage, the amplitude and the temperature of the bass unit 1; modeling the coaxial devices with the high-pitch unit 2 and the low-pitch unit 1, and obtaining a heat conduction function between the coaxial devices; calculating the current temperature of the high-pitched unit 2 according to the current voltage of the high-pitched unit 2; predicting the temperature of the bass unit 1 at the next moment according to the temperature information fed back by the current of the bass unit 1 at the previous moment; the treble unit 2 of the coaxial device is connected with the bass unit 1 in series, a target gain is obtained according to the current temperature of the treble unit 2, the temperature of the next moment of the bass 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 invention protects the high-pitch unit 2 in a feedforward mode and protects the low-pitch unit 1 in a feedback mode, so that the sounding quality of the coaxial loudspeaker can be improved, the possibility of noise and distortion is reduced, and the practical use requirement is met.
While the invention has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the invention.
Claims (10)
1. The protection method of the coaxial loudspeaker is characterized by comprising the following steps of:
modeling the temperature of a high-pitched unit, and obtaining a transfer function of the voltage and the temperature of the high-pitched unit;
modeling the temperature and the amplitude of a bass unit, and obtaining the transfer function of the voltage, the amplitude and the temperature of the bass unit;
modeling the coaxial devices with the high-pitched unit and the low-pitched unit, and obtaining a heat conduction function between the coaxial devices;
calculating the current temperature of the high-pitched unit according to the current voltage of the high-pitched unit;
predicting the temperature of the bass unit at the next moment according to the temperature information fed back by the current of the bass unit at the previous moment;
and the high-pitch unit protection and the low-pitch unit protection of the coaxial device are connected in series, a target gain is obtained according to the current temperature of the high-pitch unit, the temperature of the low-pitch unit at the next moment, an original audio signal and a corresponding preset threshold value, and the original audio signal is processed according to the target gain.
2. The method of claim 1, wherein the transfer function of the voltage, amplitude and temperature of the bass unit is composed of a transfer function of the voltage and temperature of the bass unit and a transfer function of the voltage and amplitude of the bass unit in series.
3. The method of claim 2, wherein the transfer function of the voltage and temperature of the bass unit is calculated from the thermal model function of the bass unit, the I/V feedback data and the thermal transfer function between the coaxial devices.
4. The method according to claim 1, wherein the transfer function of the voltage and the temperature of the tweeter unit is composed of a transfer function of the total voltage of the power amplifier of the tweeter unit and the voltage of the tweeter unit, a transfer function of the voltage and the temperature of the tweeter unit, and a thermal transfer function between the coaxial devices in series.
5. The method of claim 4, wherein the transfer function of voltage and temperature of the tweeter unit is calculated from a thermal model function and a simulated power of the tweeter unit.
6. A protection system for a coaxial speaker, applied to the protection method for a coaxial speaker according to any one of claims 1 to 5, characterized in that the protection system for a coaxial speaker comprises a bass unit, a treble unit, a signal control module and a heat conduction module;
the signal control module is used for weighting the signal gains of the bass unit and the treble unit;
the heat conduction module is used for establishing a heat transfer model between the high-pitched unit and the low-pitched unit.
7. The protection system of a coaxial speaker of claim 6, wherein the bass unit comprises:
a bass signal acquisition module;
the I/V feedback module is used for feeding back the voltage of the bass unit;
the voice coil temperature calculation module is used for feeding back the temperature of the voice coil;
the low-tone temperature control module is used for performing gain processing on the original audio signal through temperature gain;
the amplitude module is used for acquiring the transfer function of the amplitude and the voltage of the bass unit;
a bass amplitude prediction module for predicting the amplitude and performing gain processing on the original audio signal using the amplitude gain;
the treble unit includes:
a high-pitch signal acquisition module;
the temperature module is used for acquiring a transfer function of the voltage and the temperature of the high-pitched unit;
and the high-pitch temperature control module is used for predicting the temperature of the high-pitch unit and performing gain processing on the original audio signal by utilizing the temperature gain.
8. A protection device for a coaxial speaker, applied to the protection method for a coaxial speaker according to any one of claims 1 to 5, characterized in that the protection device for a coaxial speaker comprises a main link and a plurality of branched links connected in parallel with the main link;
the main link comprises a signal control module, wherein the input end of the signal control module is used for receiving an original audio signal and is also connected with the output ends of an amplitude control module of a bass unit and a treble temperature control module of a treble unit, the output end of the signal control module is connected with a coaxial device, and the output end of each branch link is connected with the input end of the signal control module;
at least one branched path comprises a high-pitch temperature calculation module, and a temperature module and a heat conduction module are arranged in the rest branched paths in series;
at least one branched path comprises a bass temperature calculation module, and I/V feedback modules and voice coil temperature calculation modules are arranged in the rest branched paths in series;
at least one branched path comprises a bass amplitude prediction module, and I/V feedback modules and amplitude modules are arranged in the rest branched paths in series.
9. The protection device of claim 8, wherein the high-pitched temperature computing module and the low-pitched temperature computing module each comprise a thermal model function and a direct current resistance computing module.
10. The protection device of the coaxial loudspeaker is characterized in that an audio signal input end of the protection device of the coaxial loudspeaker is connected in series with at least one protection device of the coaxial loudspeaker;
wherein the protection device of the coaxial speaker is the protection device of the coaxial speaker according to any one of claims 8 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310354455.2A CN116437264A (en) | 2023-04-04 | 2023-04-04 | Protection method, protection system, protection device and protection device for coaxial loudspeaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310354455.2A CN116437264A (en) | 2023-04-04 | 2023-04-04 | Protection method, protection system, protection device and protection device for coaxial loudspeaker |
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| CN116437264A true CN116437264A (en) | 2023-07-14 |
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|---|---|---|---|
| CN202310354455.2A Pending CN116437264A (en) | 2023-04-04 | 2023-04-04 | Protection method, protection system, protection device and protection device for coaxial loudspeaker |
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| CN (1) | CN116437264A (en) |
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