CN213818154U - PoE feed network audio power amplifier device and audio amplifier - Google Patents
PoE feed network audio power amplifier device and audio amplifier Download PDFInfo
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- CN213818154U CN213818154U CN202022815366.8U CN202022815366U CN213818154U CN 213818154 U CN213818154 U CN 213818154U CN 202022815366 U CN202022815366 U CN 202022815366U CN 213818154 U CN213818154 U CN 213818154U
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Abstract
The utility model relates to a PoE feed network audio power amplifier device and a sound box, which comprises a PoE power receiving unit, a power supply conversion unit, a network interface module for accessing input signals, a network audio transmission unit and a power amplifier unit; the network interface module is respectively connected with the PoE power receiving unit, the network audio transmission unit and the power supply conversion unit, and the network audio transmission unit is connected with the power amplification unit; the input signal comprises an audio signal, a control signal and a power supply signal; the PoE power receiving unit converts the power signal into a first voltage signal and a control signal for interaction; the power supply conversion unit converts the first voltage signal into a second voltage signal; the power amplification unit converts, processes and amplifies the audio signal to output an analog audio signal so as to drive the loudspeaker. The utility model discloses a structure of audio amplifier system is simplified to networked audio transmission and feed transmission scheme, and the operating condition of real time monitoring power amplifier and audio amplifier improves the intelligent degree of amplifier system, reduces the construction degree of difficulty of amplifier engineering.
Description
Technical Field
The utility model relates to a technical field of audio amplifier, more specifically say, relate to a network audio power amplifier device and audio amplifier of PoE feed.
Background
With the development of electronic technology and network technology, audio transmission of networks based on general-purpose computers has gradually entered the professional audio field. Currently DanteTMNetwork audio technology has become the actual standard after years of application and practice, however, the existing sound boxes, such as the ceiling sound box, are required to be connected with an audio processor, a power amplifier module and the like, the structure is complex, and the working parameters and the state of each sound box cannot be adjusted and monitored in real time.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, a network audio power amplifier device and audio amplifier of PoE feed is provided.
The utility model provides a technical scheme that its technical problem adopted is: constructing a PoE-fed network audio power amplifier device, which comprises a PoE power receiving unit, a power supply conversion unit, a network interface module, a network audio transmission unit and a power amplifier unit;
one end of the network interface module is connected with one end of the PoE power receiving unit, the other end of the network interface module is connected with one end of the network audio transmission unit, the other end of the PoE power receiving unit is connected with the power supply conversion unit, and the other end of the network audio transmission unit is connected with the power amplification unit;
the network interface module is used for accessing an input signal; the input signal includes: audio signals, control signals and power signals;
the PoE power receiving unit receives a power supply signal accessed by the network interface module, converts the power supply signal into a first voltage signal and performs control signal interaction with external equipment through the network interface module;
the power supply conversion unit receives the first voltage signal and converts the first voltage signal into a second voltage signal so as to supply power to the network audio power amplifier device;
the network audio transmission unit is used for converting the audio signal and transmitting the audio signal to the power amplification unit;
and the power amplification unit receives the audio signal, converts and amplifies the audio signal, and outputs an analog audio signal to drive a loudspeaker.
Wherein the network audio transmission unit comprises: the network conversion module and the network audio transmission module;
one end of the network conversion module is connected with the network interface module, the other end of the network conversion module is connected with one end of the network audio transmission module, and the other end of the network audio transmission module is connected with the power amplifier unit.
Wherein, the power amplifier unit includes: the device comprises a DSP processing module and a power amplification module;
one end of the DSP processing module is connected with the network conversion module, and the other end of the DSP processing module is connected with the power amplification module.
Wherein, the power amplifier unit still includes: and the digital-to-analog conversion module is arranged between the DSP processing module and the power amplification module and is used for performing digital-to-analog conversion processing on the data audio signal output by the DSP processing module.
Wherein, still include: and the microprocessor is arranged between the network audio transmission module and the power amplification unit.
Wherein, still include: and the analog input unit is connected with external equipment and used for accessing an analog input signal and converting the analog input signal.
Wherein the analog input unit includes: the analog input interface and the analog-to-digital conversion module;
one end of the analog input interface is connected with external equipment, the other end of the analog input interface is connected with one end of the analog-to-digital conversion module, and the other end of the analog-to-digital conversion module is connected with the DSP processing module.
Wherein, still include: and the local power supply unit is connected with the power supply conversion unit and used for accessing a power supply signal and processing the power supply signal to output a first voltage signal.
Wherein the network audio transmission module comprises: 2-channel input 2-channel output, 4-channel input 4-channel output … …, N-channel input N-channel output.
Wherein the network interface module comprises at least one RJ45 network interface.
The utility model also provides a sound box, including above the network audio power amplifier device of PoE feed.
Implement the utility model discloses a network audio power amplifier device and audio amplifier of PoE feed has following beneficial effect: the device comprises a PoE power receiving unit, a power supply conversion unit, a network interface module, a network audio transmission unit and a power amplifier unit; one end of the network interface module is connected with one end of the PoE power receiving unit, the other end of the network interface module is connected with one end of the network audio transmission unit, the other end of the PoE power receiving unit is connected with the power supply conversion unit, and the other end of the network audio transmission unit is connected with the power amplification unit; the network interface module is used for accessing an input signal and inputting the input signal; the input signal includes: audio signals, control signals and power signals; the PoE power receiving unit converts the power signal into a first voltage signal and performs control signal interaction; the power supply conversion unit converts the first voltage signal into a second voltage signal; the power amplification unit converts the audio signal transmitted by the network audio transmission module, amplifies the audio signal and outputs an analog audio signal to drive the loudspeaker. The utility model discloses a structure of audio amplifier system is simplified to networked audio transmission and feed transmission scheme, and the operating condition of real time monitoring power amplifier and audio amplifier improves the intelligent degree of amplifier system, reduces the construction degree of difficulty of amplifier engineering.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of a first embodiment of a PoE-fed network audio power amplifier device provided by the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the PoE-fed network audio power amplifier device provided by the present invention;
fig. 3 is a schematic structural diagram of a third embodiment of the PoE-fed network audio power amplifier device provided by the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of the PoE-fed network audio power amplifier device provided by the present invention.
As shown in fig. 1, the PoE-fed network audio power amplifier device includes a PoE powered unit 11, a power supply conversion unit 12, a network interface module 13, a network audio transmission unit 14, and a power amplifier unit 15.
One end of the network interface module 13 is connected to one end of the PoE power receiving unit 11, the other end is connected to one end of the network audio transmission unit 14, the other end of the PoE power receiving unit 11 is connected to the power supply conversion unit 12, and the other end of the network audio transmission unit 14 is connected to the power amplification unit 15.
In some embodiments, the network interface module 13 is used to access input signals; the input signal includes: audio signals, control signals, and power signals. Optionally, in some embodiments, the network interface module 13 includes at least one RJ45 network interface. Wherein, when only one RJ45 network interface is provided, the RJ45 network interface can receive PoE power feed. Further, when a plurality of RJ45 network interfaces are provided, one of the plurality of RJ45 network interfaces can receive PoE power feed, and the rest of the RJ45 network interfaces can be exchanged with each other under the configuration of the network adapter, so that a plurality of network devices can be connected in a daisy chain.
The PoE power receiving unit 11 receives a power signal accessed by the network interface module 13, converts the power signal into a first voltage signal, and performs control signal interaction with an external device through the network interface module 13. Wherein, the first voltage signal is a +24V voltage signal. Alternatively, in some embodiments, the PoE powered unit 11 can support IEEE 802.3 af/at/bt. Further, the PoE powered unit 11 may include a PoE powered chip. Optionally, the PoE powered chip can employ chips including, but not limited to, TPS 23730. The output power of the power amplifier module is different under different PoE power supply levels.
The power supply conversion unit 12 receives the first voltage signal, and converts the first voltage signal into a second voltage signal to supply power to the network audio power amplifier device. In some embodiments, the power supply conversion unit 12 may include a DC/DC conversion unit, and is mainly configured to convert the first voltage signal output by the PoE power receiving unit 11 into second voltage signals, such as +15V, -15V, +5.0V, +3.3V, and the like, for supplying electric energy to each functional module/unit of the PoE-fed network audio power amplifier device according to an embodiment of the present invention. Optionally, in some embodiments, the DC/DC conversion unit may include a DC/DC conversion chip, including but not limited to LT3757 chip, RT8293B chip, LM1117-3.3V chip, and other necessary peripheral devices.
The network audio transmission unit 14 is configured to convert the audio signal and transmit the converted audio signal to the power amplifier unit 15. Optionally, in some embodiments, the network audio transmission unit 14 includes: a network conversion module 141 and a network audio transmission module 142. One end of the network conversion module 141 is connected to the network interface module 13, the other end is connected to one end of the network audio transmission module 142, and the other end of the network audio transmission module 142 is connected to the power amplifier unit 15. Optionally, the network conversion module 141 (i.e., PHY/SWITCH module) may include KSZ8081RNACA-TR, and other necessary peripheral components. The network audio transmission module 142(Dante module) includes a network professional audio transmission chip and other necessary peripheral devices. The network professional audio transmission chip comprises, but is not limited to UXT-01-002F.
In some embodiments, the network audio transmission module 142 includes: any one of 2-channel input 2-channel output, 4-channel input 4-channel output, … …, and N-channel input N-channel output; n is an integer.
The power amplifier unit 15 receives the audio signal, converts the audio signal, and outputs an analog audio signal. In this embodiment, the power amplifier unit 15 may include a class D smart power amplifier having a DSP processing function, for example, a class D smart power amplifier including, but not limited to, TAS5733, TAS5805, and the like may be used. The D-type intelligent Suzhou has various back-end audio processing capabilities, such as multi-band DRC (dynamic range control), AGL (automatic gain limiter), EQ (equalizer) and the like, has higher intelligence, can be suitable for PoE power devices, and can greatly improve the integration level of the PoE-fed network audio power amplifier device in the embodiment of the invention.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a second embodiment of the PoE-fed network audio power amplifier device provided by the present invention.
As shown in fig. 2, in this embodiment, the power amplifier unit 15 includes: a DSP processing block 151 and a power amplification block 153. One end of the DSP processing module 151 is connected to the network conversion module 141, and the other end of the DSP processing module 151 is connected to the power amplification module 153.
Alternatively, in some embodiments, the DSP processing module 151 may comprise an audio DSP chip, including but not limited to the sigmafsp family such as ADAU1701, 1702, etc., that has both analog direct input/output interfaces (ADC, DAC built-in) and digital audio I2S interfaces. The audio DSP chip mainly completes gain adjustment of audio signals, a high-pass low-pass filter, multi-section parameter equalization, sound mixing and routing matrixes, delay processing of about 100ms, and a peak amplitude limiter of the signals guarantees that output power is limited within a limit range of PoE power supply.
In some embodiments, the power amplification module 153 may employ a class AB analog power amplifier, and at this time, the DSP processing module 151 transmits the audio signal that needs to be output in an analog manner to the DAC conversion module, that is, in this embodiment, a digital-to-analog conversion module 152(DAC conversion module) for performing digital-to-analog conversion processing on the data audio signal output by the DSP processing module 151 needs to be further disposed between the DSP processing module 151 and the power amplification module 153. After the digital audio signals output by the DSP processing module 151 are converted into analog audio signals by the DAC conversion module, the analog audio signals are transmitted to the AB type analog power amplifier, and the analog audio signals for driving the loudspeaker box to sound are output by the AB type analog power amplifier. In some embodiments, the digital-to-analog conversion module 152 may include a high-performance professional audio signal digital-to-analog converter chip, including but not limited to a CS4398 chip, and other necessary peripheral devices.
Alternatively, in some other embodiments, if the power amplifier module 153 includes a class D amplifier with I2S/TDM digital interface, such as TAS2770, TAS5720, etc., the audio digital signal processed by the DSP processing module 151 can be directly fed to the class D power amplifier without additional ADC or DAC conversion.
In some embodiments, the power amplification module 153 can detect the total output power, transmit the detected total output power to the network audio transmission module 142, and then the network audio transmission module 142 controls the adjustment of the output power by the DSP processing module 151. Furthermore, in order to save power, a class D power amplifier chip and circuit are generally used.
Further, in some embodiments, as shown in fig. 2, the PoE-fed network audio power amplifier device further includes: and the microprocessor 16 is arranged between the network audio transmission module 142 and the power amplifier unit 15. By arranging the microprocessor 16 between the network audio transmission module 142 and the power amplifier unit 15, the PoE fed network audio power amplifier device can run more smoothly, and has higher efficiency and better stability. Alternatively, in some embodiments, the microprocessor 16 may include, but is not limited to, an STM32F103RBT6 chip.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a second embodiment of the PoE-fed network audio power amplifier device provided by the present invention.
As shown in fig. 3, in this embodiment, the PoE-fed network audio power amplifier device further includes: and the analog input unit is connected with external equipment and used for accessing the analog input signal and converting the analog input signal.
Optionally, in some embodiments, the analog input unit includes: an analog input interface 17 and an analog-to-digital conversion module 18; one end of the analog input interface 17 is connected to an external device, the other end is connected to one end of the analog-to-digital conversion module 18, and the other end of the analog-to-digital conversion module 18 is connected to the DSP processing module 151.
In some embodiments, the analog audio signal is input through the analog input interface 17 and converted into a digital audio signal through the analog-to-digital conversion module 18, and the digital audio signal is transmitted to the DSP processing module 151 for processing. The DSP processing module 151 performs sound mixing and routing on the digital audio signal input by the analog-to-digital conversion module 18, and the input digital audio signal is sent back to the network audio transmission module 142 after being subjected to sound mixing and routing by the DSP processing module 151, and then is transmitted to other devices having Dante protocols, which can be transmitted to the network, by the network interface module 13. The DSP processing module 151 may analyze an input audio signal into audio signals of different frequency bands through filtering and equalization, so as to drive power amplifiers and sound boxes of different frequency bands.
Optionally, in some embodiments, analog input interface 17 may include a low noise operational amplifier, which may include, but is not limited to, NE5532, and other necessary peripherals.
In some embodiments, the analog-to-digital conversion module 18 may include a high-performance professional audio signal analog-to-digital conversion chip, including but not limited to a CS5361 chip, and other necessary peripheral components.
Further, in some embodiments, as shown in fig. 3, the PoE-fed network audio power amplifier device further includes: and the local power supply unit 19 is connected with the power supply conversion unit 12 and used for accessing the power supply signal and processing the power supply signal to output a first voltage signal.
Alternatively, in some embodiments, the local power supply unit 19 may employ an AC/DC power adapter, which may be input as DC 48V/2A.
In some embodiments, the local power supply unit 19 and the PoE powered unit 11 can be input simultaneously, can be backed up with each other, and can both convert the required power voltage to supply power through the power conversion unit 12.
In some embodiments, the PoE-fed network audio power amplifier device of the present invention may be used alone or in combination.
Further, the utility model also provides an audio amplifier, wherein, this audio amplifier can include the utility model discloses the network audio power amplifier device of PoE feed.
The utility model discloses network audio power amplifier device of PoE feed has PoE power supply conversion unit 12, Dante network audio transmission and DSP handle, D class power amplifier, can imbed all kinds of smallpox installation audio amplifier or cylinder audio amplifier conveniently, this network audio power amplifier device of PoE feed is through a net twine just can accept the feed, insert audio signal, and accept system monitoring instruction and response, not only greatly reduced the complexity that the audio frequency sound amplification system constitutes, under the digital and networked prerequisite of having realized active audio amplifier, still can independently adjust the volume of every audio amplifier in real time through inside audio DSP, the tone quality, time delay and pressure limit isoparametric, improve the convenience of fixed mounting debugging such as smallpox audio amplifier and the security of system work.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and implement the present invention accordingly, which can not limit the protection scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention. It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (11)
1. A PoE feed network audio power amplifier device is characterized by comprising a PoE power receiving unit, a power supply conversion unit, a network interface module, a network audio transmission unit and a power amplifier unit;
one end of the network interface module is connected with one end of the PoE power receiving unit, the other end of the network interface module is connected with one end of the network audio transmission unit, the other end of the PoE power receiving unit is connected with the power supply conversion unit, and the other end of the network audio transmission unit is connected with the power amplification unit;
the network interface module is used for accessing an input signal; the input signal includes: audio signals, control signals and power signals;
the PoE power receiving unit receives a power supply signal accessed by the network interface module, converts the power supply signal into a first voltage signal and performs control signal interaction with external equipment through the network interface module;
the power supply conversion unit receives the first voltage signal and converts the first voltage signal into a second voltage signal so as to supply power to the network audio power amplifier device;
the network audio transmission unit is used for converting the audio signal and transmitting the audio signal to the power amplification unit;
and the power amplification unit receives the audio signal, converts and amplifies the audio signal, and outputs an analog audio signal to drive a loudspeaker.
2. The PoE fed network audio power amplifier device of claim 1, wherein said network audio transmission unit comprises: the network conversion module and the network audio transmission module;
one end of the network conversion module is connected with the network interface module, the other end of the network conversion module is connected with one end of the network audio transmission module, and the other end of the network audio transmission module is connected with the power amplifier unit.
3. The PoE fed network audio power amplifier device of claim 2, wherein said power amplifier unit comprises: the device comprises a DSP processing module and a power amplification module;
one end of the DSP processing module is connected with the network conversion module, and the other end of the DSP processing module is connected with the power amplification module.
4. The PoE fed network audio power amplifier device of claim 3, wherein said power amplifier unit further comprises: and the digital-to-analog conversion module is arranged between the DSP processing module and the power amplification module and is used for performing digital-to-analog conversion processing on the data audio signal output by the DSP processing module.
5. The PoE fed network audio power amplifier device of claim 4, further comprising: and the microprocessor is arranged between the network audio transmission module and the power amplification unit.
6. The PoE fed network audio power amplifier device of claim 3, further comprising: and the analog input unit is connected with external equipment and used for accessing an analog input signal and converting the analog input signal.
7. The PoE fed network audio power amplifier device of claim 6, wherein said analog input unit comprises: the analog input interface and the analog-to-digital conversion module;
one end of the analog input interface is connected with external equipment, the other end of the analog input interface is connected with one end of the analog-to-digital conversion module, and the other end of the analog-to-digital conversion module is connected with the DSP processing module.
8. The PoE fed network audio power amplifier device of claim 1, further comprising: and the local power supply unit is connected with the power supply conversion unit and used for accessing a power supply signal and processing the power supply signal to output a first voltage signal.
9. The PoE fed network audio power amplifier device of claim 2, wherein said network audio transmission module comprises: 2-channel input 2-channel output, 4-channel input 4-channel output … …, N-channel input N-channel output.
10. A PoE fed network audio power amplifier arrangement as recited in any of claims 1 to 9 wherein said network interface module comprises at least one RJ45 network interface.
11. A loudspeaker, comprising a PoE-fed network audio power amplifier device as claimed in any one of claims 1 to 10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022815366.8U CN213818154U (en) | 2020-11-27 | 2020-11-27 | PoE feed network audio power amplifier device and audio amplifier |
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| CN202022815366.8U CN213818154U (en) | 2020-11-27 | 2020-11-27 | PoE feed network audio power amplifier device and audio amplifier |
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| CN213818154U true CN213818154U (en) | 2021-07-27 |
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| CN202022815366.8U Active CN213818154U (en) | 2020-11-27 | 2020-11-27 | PoE feed network audio power amplifier device and audio amplifier |
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