CN214756372U - Network terminal of fire alarm system - Google Patents
Network terminal of fire alarm system Download PDFInfo
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- CN214756372U CN214756372U CN202120163515.9U CN202120163515U CN214756372U CN 214756372 U CN214756372 U CN 214756372U CN 202120163515 U CN202120163515 U CN 202120163515U CN 214756372 U CN214756372 U CN 214756372U
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Abstract
The utility model provides a fire alarm system's network terminal, include: the digital audio signal and IP address input module is used for receiving the digital audio signal from a computer and/or a router and identifying an IP address; the digital signal decoding module is connected with the digital audio signal and IP address input module and used for decoding and processing the digital audio signal received by the digital audio signal and IP address input module and then providing the decoded digital audio signal and IP address to the digital audio signal and IP address input module; the digital-to-analog conversion module is connected with the digital audio signal and the IP address input module so as to receive the digital audio signal decoded and processed by the digital signal decoding module and convert the digital audio signal into an analog output signal; and the power amplifier is connected with the digital-to-analog conversion module so as to integrate and amplify the analog output signal and output the amplified analog output signal to at least one sound playing component according to the IP address for playing. The network terminal is capable of achieving high-speed and accurate transmission of sound source information, reasonable in cost and considering a fire alarm system.
Description
Technical Field
The utility model relates to an information communication field, concretely relates to fire alarm system's network terminal.
Background
At present, public broadcasting is widely applied to the fields of teaching notification, music broadcasting, fire fighting alarm and the like.
However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:
most public broadcasting terminals still adopt a public broadcasting power amplifier (PA power amplifier), and the technology that the voltage of an audio signal is increased through a high-voltage transformer is adopted in the public broadcasting terminal so as to achieve the purpose of transmitting a sound source in a long distance. The price and the self weight of the PA power amplifier are difficult to reduce due to the expensive and heavy high-voltage output transformer in the PA power amplifier;
secondly, the existing public broadcasting system must be equipped with a high-quality horn wire and a high-voltage horn of a step-down transformer, so that the whole public broadcasting system can only realize information transmission, the cost is high due to large-scale terminal layout, and the transmission speed and stability of the public broadcasting system cannot meet the requirements of a fire alarm system easily;
furthermore, it is difficult to accurately transmit sound source information, such as sound source information to a single terminal or a portion of terminals, by using a PA power amplifier.
Furthermore, a network terminal which can realize high-speed and accurate transmission of sound source information, has reasonable cost and is also a fire alarm system is urgently needed in the market.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned public address terminal is with high costs, be difficult to realize the problem that the high speed of source information, accurate conveying, the utility model discloses in order to provide a fire alarm system's that overcomes above-mentioned problem or solve above-mentioned problem at least partially network terminal.
An aspect of the present invention provides a network terminal of a fire alarm system, including:
the digital audio signal and IP address input module is used for being connected with a computer and/or a router so as to receive the digital audio signal from the computer and/or the router and identify an IP address;
the digital signal decoding module is connected with the digital audio signal and IP address input module and used for decoding and processing the digital audio signal received by the digital audio signal and IP address input module and then providing the decoded digital audio signal and IP address to the digital audio signal and IP address input module;
the digital-to-analog conversion module is connected with the digital audio signal and the IP address input module and used for receiving the digital audio signal decoded and processed by the digital signal decoding module and converting the digital audio signal into an analog output signal;
and the power amplifier is connected with the digital-to-analog conversion module so as to integrate and amplify the analog output signal and output the analog output signal to at least one sound playing component according to the IP address for playing.
Preferably, the network terminal of the fire alarm system further comprises a CPU chip, and the CPU chip comprises a DSP processing module, and the digital audio signal and IP address input module;
the DSP processing module is connected with the digital-to-analog conversion modules to receive the digital audio signals sent to the digital-to-analog conversion modules and decoded and processed by the digital signal decoding module, and then the digital audio signals are returned to the digital-to-analog conversion modules.
Preferably, the network terminal of the fire alarm system further includes:
and the MCU control module is connected with the DSP processing module to control the DSP processing module to adjust the playing volume of the sound playing component.
Preferably, the network terminal of the fire alarm system further includes:
and the analog audio input module is connected with the input end of the digital-to-analog conversion module and used for receiving an analog audio signal and sending the analog audio signal to the digital-to-analog conversion module.
Preferably, the network terminal of the fire alarm system further includes:
and the clock signal supply module is connected with the digital audio signal and IP address input module and the digital signal decoding module so as to provide clock signals for the digital audio signal and IP address input module and the digital signal decoding module.
Preferably, the model of the CPU chip is 88E 6320.
Preferably, the digital signal decoding module comprises a decoding chip;
the model of the decoding chip is MK60N512VMD 100.
Preferably, the digital-to-analog conversion module comprises a digital-to-analog converter;
the model of the digital-to-analog converter is CS4272, a pin 6 of the digital-to-analog converter is connected with a pin 10 of the CPU chip, and a pin 14 of the CPU chip is connected with a pin 7 of the digital-to-analog converter.
Preferably, the power amplifier comprises a power amplification chip;
the model of the power amplification chip is TPA3116D2, pin 4 of the power amplification chip is connected with pin 24 and pin 25 of the digital-to-analog converter through a first operational amplifier, and pin 10 of the power amplification chip is connected with pin 26 and pin 27 of the digital-to-analog converter through the first operational amplifier;
and the pin 29 and the pin 30 of the power amplification chip are connected with the sound playing component, and the pin 23 and the pin 24 of the power amplification chip are connected with the sound playing component.
Preferably, the analog audio input module includes a second operational amplifier and a third operational amplifier, and the models of the second operational amplifier and the third operational amplifier are both NJM 4580;
the pin 7 and the pin 1 of the second operational amplifier are respectively connected with the pin 16 and the pin 17 of the digital-to-analog converter, and the pin 7 and the pin 1 of the third operational amplifier are respectively connected with the pin 18 and the pin 19 of the digital-to-analog converter.
The utility model has the advantages that: the utility model has reasonable and ingenious structural design; through the network terminal provided by the utility model, when the public broadcasting function is executed, the use of a high-voltage output transformer is effectively avoided, the use of an expensive and heavy high-voltage output transformer in the PA power amplifier of the traditional public broadcasting terminal is avoided, and the self weight and the cost are effectively reduced; moreover, when the utility model provides a network terminal realizes teaching notification, music broadcasting or fire alarm, the analog output signal can be transmitted to the sound playing component for playing after power amplification is carried out once through the power amplifier, the process does not need to involve voltage reduction, and then the sound playing component does not need to be a high-voltage loudspeaker equipped with a step-down transformer, and the quality requirement on a loudspeaker line is indirectly reduced; the cost requirement of large-scale layout is greatly reduced, and the fire alarm system is particularly suitable for the requirement of large-scale layout of the fire alarm system; in addition, the IP address is identified through the digital audio signal and the IP address input module, and the power amplifier outputs the analog output signal to at least one sound playing component for playing according to the IP address after integrating and amplifying the analog output signal, so that the sound source information transmission of a single terminal or part of terminals is realized; the accuracy of sound source information transmission is greatly improved, and unnecessary waste and panic are reduced; moreover, the stability and the accuracy of the analog output signal are effectively ensured through the arrangement of the DSP processing module; the digital audio signal can be processed through the DSP processing module to realize the adjustment of the playing sound, so that the accurate transmission of sound source information is realized; the network terminal can realize high-speed and accurate transmission of sound source information, is reasonable in cost and gives consideration to a fire-fighting alarm system.
The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a block diagram of a network terminal of a fire alarm system according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a digital audio signal and IP address input module according to an embodiment of the present invention;
fig. 3 is a circuit diagram of the DSP chip and the digital-to-analog converter according to an embodiment of the present invention;
fig. 4 is a circuit diagram of the MCU control module in the embodiment of the present invention;
fig. 5 is a circuit diagram of a power amplifier according to an embodiment of the present invention;
fig. 6 is a circuit diagram of a digital signal decoding module according to an embodiment of the present invention;
fig. 7 is a circuit diagram of a clock signal supply module according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 7, according to an aspect of the present invention, an embodiment of the present invention provides a network terminal of a fire alarm system, including:
the digital audio signal and IP address input module 1 is used for connecting with a computer and/or a router so as to receive the digital audio signal from the computer and/or the router and identify an IP address;
the digital signal decoding module 2 is connected with the digital audio signal and IP address input module, and is used for decoding and processing the digital audio signal received by the digital audio signal and IP address input module 1 and then providing the decoded digital audio signal and IP address to the digital audio signal and IP address input module 1;
the digital-to-analog conversion module 3 is connected with the digital audio signal and IP address input module 1 so as to receive the digital audio signal decoded and processed by the digital signal decoding module 2 and convert the digital audio signal into an analog output signal;
and the power amplifier 4 is connected with the digital-to-analog conversion module 3 and used for outputting the analog output signal to at least one sound playing component 5 according to the IP address for playing after integrating and amplifying the analog output signal.
Specifically, a digital audio signal and an IP address input module 1 are used for receiving a digital audio signal sent by a computer or a router or the computer and the router together and identifying an IP address; decoding by the digital signal decoding module 2 in the above process; further, the digital audio signal received and decoded by the digital signal decoding module 2 is converted into an analog output signal by a digital-to-analog conversion module 3; finally, the power amplifier 4 outputs the analog output signal after the integrated amplification processing to one or more sound playing components 5 for playing according to the identified IP address.
Through the network terminal provided by the utility model, when the public broadcasting function is executed, the use of a high-voltage output transformer is effectively avoided, the use of an expensive and heavy high-voltage output transformer in the PA power amplifier of the traditional public broadcasting terminal is solved, and the self weight and the cost are effectively reduced; moreover, when the utility model provides a network terminal realizes teaching notification, music broadcasting or fire alarm, the analog output signal can be transmitted to the sound playing component 5 for playing after being subjected to power amplification once through the power amplifier 4, the process does not need to involve voltage reduction, and the sound playing component 5 does not need to be a high-voltage loudspeaker equipped with a step-down transformer, thereby indirectly reducing the quality requirement on a loudspeaker line; the cost requirement of large-scale layout is greatly reduced, and the fire alarm system is particularly suitable for the requirement of large-scale layout of the fire alarm system;
in addition, the IP address is identified through the digital audio signal and IP address input module 1, the power amplifier 4 outputs the analog output signal after being integrated and amplified to at least one sound playing component 5 according to the IP address for playing, so that the sound source information transmission of a single terminal or partial terminals is realized, and the audio source information transmission system can transmit broadcast or alarm audio to any one or more classrooms particularly to a teaching network; the accuracy of sound source information transmission is greatly improved, and unnecessary waste and panic are reduced.
Further, the sound playing component 5 is a loudspeaker; each sound playing component 5 corresponds to a specific IP address; namely, after the network terminal identifies the IP address, the IP address can be output to the sound playing component 5 for playing.
Preferably, the network terminal of the fire alarm system further comprises a CPU chip 6, and the CPU chip 6 comprises a DSP processing module 7 and the digital audio signal and IP address input module 1;
the DSP processing module 7 is connected to the digital-to-analog conversion modules 3 to receive the digital audio signals sent to the digital-to-analog conversion modules 3 and decoded by the digital signal decoding module 2, and then returns to the digital-to-analog conversion modules 3.
Specifically, the digital-to-analog conversion module 3 receives the digital audio signal and the digital audio signal provided by the digital audio signal and IP address input module 1 and decoded by the digital signal decoding module 2, and then sends the digital audio signal to the digital-to-analog conversion module 3 for digital signal processing and verification, and then the digital audio signal is sent back to the digital-to-analog conversion module 7 by the digital signal processing module 7 and converted into an analog output signal.
Namely, the stability and the accuracy of the analog output signal are effectively ensured through the arrangement of the DSP processing module 7; in addition, the digital audio signal can be processed by the DSP processing module 7 to realize the adjustment of the playing sound. And then realized the accurate transmission of sound source information, provided a section can realize that sound source information is high-speed, accurate transmission and cost are reasonable, compromise the network terminal of fire alarm system.
In another preferred embodiment, the DSP processing module may also be a separate DSP chip, type ADAU 1701.
Preferably, the network terminal of the fire alarm system further includes:
and the MCU control module 8 is connected with the DSP processing module 7 so as to control the DSP processing module 7 to adjust the playing volume of the sound playing component 5.
Specifically, the MCU control module 8 includes an MCU chip with a model number of LPC51U 68;
furthermore, a pin 34 and a pin 35 of the MCU chip are connected to a pin 23 and a pin 22 of the CPU chip 6 or the DSP chip, so as to realize connection and communication between the MCU chip and the DPS processing module in the CPU chip 6; furthermore, pins 13 and 14 of the MCU chip control the volume up and down of channel 1 respectively, and pins 14 and 20 control the volume up and down of channel 2 respectively. Wherein the definition of channel 1, channel 2 is described below.
Preferably, the network terminal of the fire alarm system further includes:
and the analog audio input module 9 is connected with the input end of the digital-to-analog conversion module 3, and is configured to receive an analog audio signal and send the analog audio signal to the digital-to-analog conversion module 3.
Specifically, through the setting of the analog audio input module 9, the input of analog audio can be realized.
Preferably, the network terminal of the fire alarm system further includes:
and the clock signal supply module is connected with the digital audio signal and IP address input module 1 and the digital signal decoding module 2 and is used for supplying clock signals to the digital audio signal and IP address input module 1 and the digital signal decoding module 2.
Specifically, the clock signal supply module includes a clock signal supply module including a digital audio signal and IP address input module chip 88E6320 for supplying a clock signal to the digital audio signal and IP address input module 1 and the digital signal decoding module 2.
Preferably, the model of the CPU chip 6 is 88E 6320.
Specifically, the CPU chip 6 processes digital audio signals from a computer or a router and identifies an IP address through its pin 7, pin 8, pin 10, pin 11, pin 13, pin 14, pin 15, pin 16, pin 17, pin 18, pin 20, pin 21, pin 23, pin 24, pin 25, and pin 26.
Preferably, the digital signal decoding module 2 comprises a decoding chip;
the model of the decoding chip is MK60N512VMD 100.
Preferably, the digital-to-analog conversion module 3 includes a digital-to-analog converter;
the model of the digital-to-analog converter is CS4272, a pin 6 of the digital-to-analog converter is connected with a pin 10 of the CPU chip 6 or the DSP chip, and a pin 14 of the CPU chip 6 or the DSP chip is connected with a pin 7 of the digital-to-analog converter.
Specifically, the pin 6 of the digital-to-analog converter outputs the digital audio signal obtained by the digital signal decoding module 2 and decoded by the digital signal decoding module to the pin 10 of the CPU chip 6 or the DSP chip, and the pin 14 of the CPU chip or the DSP chip outputs the digital audio signal to the pin 7 of the digital-to-analog converter after the CPU chip or the DSP chip 6 processes the signal.
Preferably, the power amplifier 4 includes a power amplifying chip;
the model of the power amplification chip is TPA3116D2, pin 4 of the power amplification chip is connected with pin 24 and pin 25 of the digital-to-analog converter through a first operational amplifier, and pin 10 of the power amplification chip is connected with pin 26 and pin 27 of the digital-to-analog converter through the first operational amplifier;
the pin 29 and the pin 30 of the power amplification chip are connected with the sound playing component 5, and the pin 23 and the pin 24 of the power amplification chip are connected with the sound playing component 5.
Specifically, the analog-to-digital converter outputs a channel 1 analog output signal through a pin 24 and a pin 25, outputs a channel 2 analog signal through a pin 26 and a pin 27, is integrated by a first operational amplifier, is connected with a pin 4 and a pin 10 of a power amplification chip for signal amplification, outputs the amplified channel 1 analog output signal to a loudspeaker through a pin 30 and a pin 29, and outputs the amplified channel 2 analog output signal to the loudspeaker through a pin 23 and a pin 24.
Further, the pin 3, the pin 4, the pin 5, the pin 6, and the pin 7 of the digital-to-analog converter are connected to the pin 8, the pin 9, the pin 32, the pin 14, and the pin 10 of the CPU chip 6 or the DSP chip.
Preferably, the analog audio input module 9 includes a second operational amplifier and a third operational amplifier, and the models of the second operational amplifier and the third operational amplifier are each NJM 4580;
the pin 7 and the pin 1 of the second operational amplifier are respectively connected with the pin 16 and the pin 17 of the digital-to-analog converter, and the pin 7 and the pin 1 of the third operational amplifier are respectively connected with the pin 18 and the pin 19 of the digital-to-analog converter.
Specifically, the pin 3, the pin 2, and the pin 6 of the second operational amplifier are used for receiving the analog signal input of the channel 1 and performing preliminary amplification; then the signal is transmitted to a pin 16 and a pin 17 of the digital-to-analog converter through a pin 7 and a pin 1 of a second operational amplifier;
the pin 3, the pin 2 and the pin 6 of the third operational amplifier are used for receiving the analog signal input of the channel 2 and performing preliminary amplification; then the signal is transmitted to a pin 18 and a pin 19 of the digital-to-analog converter through a pin 7 and a pin 1 of a third operational amplifier;
among them, the channels 1 and 2 are generally used to distinguish between left and right channels.
When the public broadcasting or fire alarm and other applications are executed, firstly, a digital audio signal which is sent by a computer or a router or the computer and the router together is received through a digital audio signal and IP address input module 1, and an IP address is identified, namely, the digital audio signal from the computer or the router is processed through a pin 7, a pin 8, a pin 10, a pin 11, a pin 13, a pin 14, a pin 15, a pin 16, a pin 17, a pin 18, a pin 20, a pin 21, a pin 23, a pin 24, a pin 25 and a pin 26 of a CPU chip 6 or a DSP chip, and the IP address is identified;
decoding by the digital signal decoding module 2 in the above process;
then, the digital audio signal received and decoded by the digital signal decoding module 2 is converted into an analog output signal by a digital-to-analog conversion module 3; finally, the power amplifier 4 outputs the analog output signals after integrated amplification processing to one or more sound playing components 5 for playing according to the identified IP address; that is, the analog-to-digital converter outputs a channel 1 analog output signal through the pin 24 and the pin 25, outputs a channel 2 analog output signal through the pin 26 and the pin 27, is integrated by the first operational amplifier, is connected with the pin 4 and the pin 10 of the power amplification chip for signal amplification, outputs the amplified channel 1 analog output signal to the loudspeaker through the pin 30 and the pin 29, and outputs the amplified channel 2 analog output signal to the loudspeaker through the pin 23 and the pin 24.
It should be noted that, after receiving the digital audio signal and the digital audio signal provided by the IP address input module 1 and decoded by the digital signal decoding module 2, the digital-to-analog conversion module 3 firstly sends the digital audio signal to the DSP processing module 7 for DSP processing and verification, and then the digital audio signal is sent by the DSP processing module 7 and returned to the digital-to-analog conversion module 3 to be converted into an analog output signal. And, the pins 13 and 14 of the MCU chip respectively control the volume increasing and decreasing of the channel 1, and the pins 14 and 20 respectively control the volume increasing and decreasing of the channel 2.
The utility model has reasonable and ingenious structural design; through the network terminal provided by the utility model, when the public broadcasting function is executed, the use of a high-voltage output transformer is effectively avoided, the use of an expensive and heavy high-voltage output transformer in the PA power amplifier of the traditional public broadcasting terminal is avoided, and the self weight and the cost are effectively reduced; moreover, when the utility model provides a network terminal realizes teaching notification, music broadcasting or fire alarm, the analog output signal can be transmitted to the sound playing component 5 for playing after being subjected to power amplification once through the power amplifier 4, the process does not need to involve voltage reduction, and the sound playing component 5 does not need to be a high-voltage loudspeaker equipped with a step-down transformer, thereby indirectly reducing the quality requirement on a loudspeaker line; the cost requirement of large-scale layout is greatly reduced, and the fire alarm system is particularly suitable for the requirement of large-scale layout of the fire alarm system; in addition, the IP address is identified through the digital audio signal and IP address input module 1, the power amplifier 4 outputs the analog output signal after being integrated and amplified to at least one sound playing component 5 according to the IP address for playing, and therefore sound source information transmission of a single terminal or partial terminals is achieved; the accuracy of sound source information transmission is greatly improved, and unnecessary waste and panic are reduced; moreover, the stability and the accuracy of the analog output signal are effectively ensured through the arrangement of the DSP processing module 7; the digital audio signal can be processed by the DSP processing module 7 to realize the adjustment of the playing sound, so that the accurate transmission of sound source information is realized; the network terminal can realize high-speed and accurate transmission of sound source information, is reasonable in cost and gives consideration to a fire-fighting alarm system.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the inherent logic thereof, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
It should also be understood that, in the embodiment of the present invention, the term "and/or" is only one kind of association relation describing an associated object, and means that there may be three kinds of relations. For example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment of the present invention.
The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (10)
1. A network terminal of a fire alarm system, comprising:
the digital audio signal and IP address input module is used for being connected with a computer and/or a router so as to receive the digital audio signal from the computer and/or the router and identify an IP address;
the digital signal decoding module is connected with the digital audio signal and IP address input module and used for decoding and processing the digital audio signal received by the digital audio signal and IP address input module and then providing the decoded digital audio signal and IP address to the digital audio signal and IP address input module;
the digital-to-analog conversion module is connected with the digital audio signal and the IP address input module and used for receiving the digital audio signal decoded and processed by the digital signal decoding module and converting the digital audio signal into an analog output signal;
and the power amplifier is connected with the digital-to-analog conversion module so as to integrate and amplify the analog output signal and output the analog output signal to at least one sound playing component according to the IP address for playing.
2. The network terminal of the fire alarm system of claim 1, further comprising a CPU chip, the CPU chip comprising a DSP processing module, the digital audio signal and IP address input module;
the DSP processing module is connected with the digital-to-analog conversion modules to receive the digital audio signals sent to the digital-to-analog conversion modules and decoded and processed by the digital signal decoding module, and then the digital audio signals are returned to the digital-to-analog conversion modules.
3. The network terminal of the fire alarm system of claim 2, further comprising:
and the MCU control module is connected with the DSP processing module to control the DSP processing module to adjust the playing volume of the sound playing component.
4. The network terminal of the fire alarm system of claim 2, further comprising:
and the analog audio input module is connected with the input end of the digital-to-analog conversion module and used for receiving an analog audio signal and sending the analog audio signal to the digital-to-analog conversion module.
5. The network terminal of the fire alarm system of claim 1, further comprising:
and the clock signal supply module is connected with the digital audio signal and IP address input module and the digital signal decoding module so as to provide clock signals for the digital audio signal and IP address input module and the digital signal decoding module.
6. The network terminal of the fire alarm system of claim 4, wherein the CPU chip is 88E6320 in model.
7. The network terminal of a fire alarm system of claim 6, wherein the digital signal decoding module comprises a decoding chip;
the model of the decoding chip is MK60N512VMD 100.
8. The network terminal of a fire alarm system of claim 6, wherein the digital-to-analog conversion module comprises a digital-to-analog converter;
the model of the digital-to-analog converter is CS4272, a pin 6 of the digital-to-analog converter is connected with a pin 10 of the CPU chip, and a pin 14 of the CPU chip is connected with a pin 7 of the digital-to-analog converter.
9. The network terminal of a fire alarm system of claim 8, wherein the power amplifier comprises a power amplification chip;
the model of the power amplification chip is TPA3116D2, pin 4 of the power amplification chip is connected with pin 24 and pin 25 of the digital-to-analog converter through a first operational amplifier, and pin 10 of the power amplification chip is connected with pin 26 and pin 27 of the digital-to-analog converter through the first operational amplifier;
and the pin 29 and the pin 30 of the power amplification chip are connected with the sound playing component, and the pin 23 and the pin 24 of the power amplification chip are connected with the sound playing component.
10. The network terminal of a fire alarm system of claim 8, wherein the analog audio input module comprises a second operational amplifier and a third operational amplifier, and the model of each of the second operational amplifier and the third operational amplifier is NJM 4580;
the pin 7 and the pin 1 of the second operational amplifier are respectively connected with the pin 16 and the pin 17 of the digital-to-analog converter, and the pin 7 and the pin 1 of the third operational amplifier are respectively connected with the pin 18 and the pin 19 of the digital-to-analog converter.
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|---|---|---|---|
| CN202120163515.9U CN214756372U (en) | 2021-01-21 | 2021-01-21 | Network terminal of fire alarm system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120163515.9U CN214756372U (en) | 2021-01-21 | 2021-01-21 | Network terminal of fire alarm system |
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| CN214756372U true CN214756372U (en) | 2021-11-16 |
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