CN203406836U - Digital power amplifier unit of passenger room - Google Patents
Digital power amplifier unit of passenger room Download PDFInfo
- Publication number
- CN203406836U CN203406836U CN201320499870.9U CN201320499870U CN203406836U CN 203406836 U CN203406836 U CN 203406836U CN 201320499870 U CN201320499870 U CN 201320499870U CN 203406836 U CN203406836 U CN 203406836U
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- CN
- China
- Prior art keywords
- power amplifier
- digital
- digital power
- audio board
- network audio
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model provides a digital power amplifier unit of a passenger room. The digital power amplifier unit of the passenger room comprises a digital power amplifier and a digital network audio board, wherein the input end of the digital power amplifier is connected with an audio output port of the digital network audio board, a power amplifier output display port of the digital power amplifier is connected with an input end of an LED display module, a power amplifier state output port of the digital power amplifier is connected with the input end of the digital network audio board, an output port of the digital power amplifier is connected with the input end of the digital network audio board through a transformer and an output sampling circuit in sequence, the output end of the digital network audio board is connected with an input end of the LED display module, and a network interface, noise audio and noise audio control signal interfaces and an address wire interface are further formed in the digital network audio board. Audio stream input, information control, backward read of the state and the like of the digital power amplifier unit of the passenger room are carried out through network transmission; compared with traditional PIS power amplifier wiring, installation is easy and convenient, and cost is reduced.
Description
Technical field
The utility model belongs to broadcasting equipment field, especially relates to digital power amplifier unit, a kind of guest room.
Background technology
In the public voice broadcast service system of the field of traffic such as light rail, subway, a power amplifier unit is set in each guest room, for amplifying the audio signal of broadcast, drive loud speaker.In power amplifier unit, traditional simulated power amplifier unit volume is large, energy conversion efficiency is low, power amplification efficiency is only 30%～40%, traditional simulated power amplifier be input as analog signal, there is the technical problem of jitter, and power amplifier signal can not be published on network in time, is inconvenient to use.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of digital power amplifier unit, guest room simple in structure, easy to use, is particluarly suitable for using in the public voice broadcast service system of the field of traffic such as light rail, subway.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: digital power amplifier unit, a kind of guest room, comprise digital power amplifier and digital network audio board, the input of described digital power amplifier is connected with the audio output port of digital network audio board, the power amplifier output display port of described digital power amplifier is connected with the input of LED display module, the power amplifier State-output port of described digital power amplifier is connected with the input of described digital network audio board, the output port of described digital power amplifier is connected with the input of digital network audio board with output sample circuit by transformer successively, the input of described digital network audio board is connected with volume button module, the output of described digital network audio board is connected with the input of LED display module, in described digital network audio board, be also provided with network interface, noise audio frequency and control signal interface thereof and address wire interface.
Further, in described digital network audio board, be also provided with emergent audio frequency and control signal interface thereof.
Further, in described digital network audio board, be also provided with power detection signal interface.
Further, described digital power amplifier is D power-like amplifier.
Further, the noise audio frequency in described digital network audio board and control signal interface thereof are two.
Advantage and the good effect that the utlity model has are: owing to adopting technique scheme, the audio-frequency information that digital power amplifier unit, guest room receives is digital form, by Ethernet, transmit, digital network audio board is provided with noise audio frequency and control signal interface, power detection signal interface and emergent audio frequency and control signal interface thereof, can monitor the state of the power subsystem in sensor noise state in place, rack in compartment, when network service is abnormal, can pass through analogue audio frequency emergent broadcast; Have simple in structure, easy to use, the advantage such as the energy conversion efficiency of digital power amplifier unit is high, reliability is strong.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of digital power amplifier unit, a kind of guest room of the utility model.
Embodiment
As shown in Figure 1, digital power amplifier unit, a kind of guest room of the utility model, comprise digital power amplifier and digital network audio board, the input of described digital power amplifier is connected with the audio output port of digital network audio board, the power amplifier output display port of described digital power amplifier is connected with the input of LED display module, the power amplifier State-output port of described digital power amplifier is connected with the input of described digital network audio board, the output port of described digital power amplifier is connected with the input of digital network audio board with output sample circuit by transformer successively, the input of described digital network audio board is connected with volume button module, the output of described digital network audio board is connected with the input of LED display module, in described digital network audio board, be also provided with a network interface, two noise audio frequency and control signal interface thereof, an address wire interface, emergent audio frequency and control signal interface and a power detection signal interface, described digital power amplifier is D power-like amplifier.
The course of work of this example: during work, the audio-frequency information that digital power amplifier unit, guest room receives is digital form, transmits by Ethernet.Under normal condition, audio signal enters through the network interface of digital network audio board, after processing, digital network audio board enters digital power amplifier, in digital power amplifier, by D class A amplifier A, carry out power amplification Hou Yi road and return to digital network audio board through output sample circuit, the audio signal of one tunnel after transformer output amplification, to drive loud speaker.When network service is abnormal, can transmit emergency signal by the emergent audio frequency in digital network audio board and control signal interface thereof, carry out emergent broadcast.Digital network audio board is provided with noise audio frequency and control signal interface and power detection signal interface, can monitor the state of the power subsystem in sensor noise state in place and rack in compartment, the level of noise receiving according to noise audio frequency and control signal interface thereof, adjusts broadcast volume automatically.Volume in digital network audio board and the network information show through LED display module.Digital power amplifier unit, guest room is by network service, shows the operating state of self and power subsystem, sensor noise.Guest room digital power amplifier energy conversion efficiency is high, and volume is little, and reliability is high, power consumption is only 1/3rd left and right of same power simulated power amplifier, and its power supply efficiency of actual can be up to more than 90%, and on car, electric energy is limited, digital power amplifier energy savings, also meets environmental requirement.
Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variations of doing according to the utility model application range and improvement etc., within all should still belonging to patent covering scope of the present utility model.
Claims (5)
1. digital power amplifier unit, a guest room, it is characterized in that: comprise digital power amplifier and digital network audio board, the input of described digital power amplifier is connected with the audio output port of digital network audio board, the power amplifier output display port of described digital power amplifier is connected with the input of LED display module, the power amplifier State-output port of described digital power amplifier is connected with the input of described digital network audio board, the output port of described digital power amplifier is connected with the input of digital network audio board with output sample circuit by transformer successively, the input of described digital network audio board is connected with volume button module, the output of described digital network audio board is connected with the input of LED display module, in described digital network audio board, be also provided with network interface, noise audio frequency and control signal interface thereof and address wire interface.
2. digital power amplifier unit, a kind of guest room according to claim 1, is characterized in that: in described digital network audio board, be also provided with emergent audio frequency and control signal interface thereof.
3. digital power amplifier unit, a kind of guest room according to claim 1 and 2, is characterized in that: in described digital network audio board, be also provided with power detection signal interface.
4. digital power amplifier unit, a kind of guest room according to claim 1, is characterized in that: described digital power amplifier is D power-like amplifier.
5. digital power amplifier unit, a kind of guest room according to claim 1, is characterized in that: the noise audio frequency in described digital network audio board and control signal interface thereof are two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499870.9U CN203406836U (en) | 2013-08-15 | 2013-08-15 | Digital power amplifier unit of passenger room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499870.9U CN203406836U (en) | 2013-08-15 | 2013-08-15 | Digital power amplifier unit of passenger room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203406836U true CN203406836U (en) | 2014-01-22 |
Family
ID=49942755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320499870.9U Expired - Lifetime CN203406836U (en) | 2013-08-15 | 2013-08-15 | Digital power amplifier unit of passenger room |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203406836U (en) |
-
2013
- 2013-08-15 CN CN201320499870.9U patent/CN203406836U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140122 |
|
| CX01 | Expiry of patent term |