CN203406886U - Circuit of broadcast control box - Google Patents
Circuit of broadcast control box Download PDFInfo
- Publication number
- CN203406886U CN203406886U CN201320502659.8U CN201320502659U CN203406886U CN 203406886 U CN203406886 U CN 203406886U CN 201320502659 U CN201320502659 U CN 201320502659U CN 203406886 U CN203406886 U CN 203406886U
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- circuit
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- power supply
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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 utility model provides the circuit of a broadcast control box, which comprises a power supply, an audio board and a control panel. The power supply and the audio board are connected with the control panel. The power supply and the audio board comprise a microphone module, a monitoring module and a power supply module. The control panel comprises a control unit, a sound card circuit and a network interface card. The control unit is respectively connected with the sound card circuit, the network interface card, a voltage stabilization block, a power supply and the monitoring circuit on the audio board. According to the technical scheme of the utility model, the transmission of the broadcasting audio information, the intercommunication audio information between two drivers' cabs, the intercommunication audio information between a drivers' cab and a passenger compartment, and corresponding control commands, is realized based on the network. The analog audio information to be transmitted is converted by the audio board into digital documents and then the digital documents are packed in the form of a network package to be transmitted based on the network, wherein CAT5e and a reserved emergency audio shielded line are adopted as the transmission medium. The electromagnetic interference property of the broadcast control box is improved through optimizing the circuit design, and the stable operation of the system is ensured. Meanwhile, the circuit of the broadcast control box has the advantages of simple structure, convenient installation and debugging, less energy loss, better stability and the like.
Description
Technical field
The utility model belongs to subway and takes out objective field of information system, especially relates to a kind of Broadcasting Control box circuit.
Background technology
In the prior art, the subway drivers' cab Broadcasting Control box in the passenger information system of the field of traffic such as light rail, subway mainly adopts 485 buses as the transfer bus of control signal, and analogue audio frequency line is as broadcasting for train audio-frequency bus and train intercommunication audio-frequency bus.The transmission means of sort signal needs three pairs of independently Shielded Twisted Pair or shielding tone frequency channel wires, and this gives the installation of vehicle-mounted passenger information system, the work and inconvenience that maintenance brings a lot of repetitions, has increased cost simultaneously.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of Broadcasting Control box circuit simple in structure, easy to use, is especially suitable for intercommunication audio frequency and drivers' cab and guest room intercommunication audio frequency and corresponding control command between transmission broadcast audio Network Based, drivers' cab.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of Broadcasting Control box circuit, comprise power supply and audio board and control board, described power supply and audio board are connected with described control board, and described power supply and audio board comprise microphone module, monitor module and power module;
Described microphone module comprises microphone audio amplifier circuit, described microphone audio amplifier circuit is that two-stage is amplified, and the road of rationing the power supply is pressed in increase on the amplifying circuit of the second level, preventing that output signal is excessive causes distortion, the input of described microphone audio amplifier circuit is connected with microphone by socket, the output of described microphone audio amplifier circuit divides two-way, the flat cable of leading up to is connected to control board, and the relay of separately leading up to is connected by the emergent audio-frequency bus in emergent interface socket and outside after connecting emergent audio control circuit;
Described monitoring module comprises monitoring circuit, and the output of described monitoring circuit is connected with monitoring loudspeaker by socket, and the input of described monitoring circuit is connected with control board;
Described power module comprises the first power transfer module and second source modular converter, the input of described the first power transfer module is connected with DC filter by socket, the output of described the first power transfer module is connected with the input of described second source modular converter, and the output of described second source modular converter is connected with the regulator block in control board;
Described control board comprises control unit, sound card circuit and network interface card, described control unit is connected with the monitoring circuit in described sound card circuit, network interface card, regulator block and power supply and audio board respectively, described control unit is connected with metal key-press by socket, the output of described sound card circuit is connected with the input of monitoring circuit in power supply and audio board, the input of described sound card circuit is connected with the output of microphone audio amplifier circuit in described power supply and audio board, described network interface card is connected with network interface, and described control unit also accesses emergent output control signal.
Further, the IO interface of described control unit is also connected with LED light, and 7 LED light complete respectively that power supply, active and standby, network speed, network connect, volume controls deixis, are directly connected with control unit.
Further, described control unit is also connected with EEPROM by iic bus, for storing IP address.
Further, described control unit is also connected with jtag interface circuit.
Further, described metal key-press is four, and built-in LED lamp, is controlled by control unit, and when button is pressed, the IO mouth level of the control unit above drawing is dragged down, and completes identification, does antistatic simultaneously and processes increase circuit reliability.
Further, the sound card chip in described sound card circuit is UDA1341TS, and band AD and DA, be connected with control unit by IIS bus interface and L3 interface, completes the conversion of audio analog signals and audio digital signals.
Further, described network card chip is DP83848C, is connected on the one hand by data/address bus with control unit, is connected on the other hand by network isolation transformer H1102 and EMI device with outside netting twine, completes the transmission of networked physics layer.
Further, described microphone is moving-coil type, is inserted on the panel of control, then connects power supply and audio board by CH2.54-2 socket by CANNON seat.
Advantage and the good effect that the utlity model has are: owing to adopting technique scheme, the scheme of intercommunication audio frequency and drivers' cab and guest room intercommunication audio frequency and corresponding control command between transmission broadcast audio Network Based, drivers' cab.The analogue audio frequency of needs transmission is converted to the form that digital document is packaged into network packet again by sound card and realizes Internet Transmission, transmission medium is CAT5E UTP cable and a reserved emergent audio frequency shielding conductor, by Optimization Design of Electronic Circuits, improve the characteristic of electromagnetic interference, guaranteed the stable operation of system; Have simple in structurely, Installation and Debugging are convenient, and energy loss reduces, the advantages such as stability increase.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Embodiment
As shown in Figure 1, a kind of Broadcasting Control box of the utility model circuit, comprises power supply and audio board and control board, and described power supply and audio board are connected with described control board, and described power supply and audio board comprise microphone module, monitor module and power module; Described microphone module comprises microphone audio amplifier circuit, described microphone audio amplifier circuit is that two-stage is amplified, and the road of rationing the power supply is pressed in increase on the amplifying circuit of the second level, preventing that output signal is excessive causes distortion, the input of described microphone audio amplifier circuit is connected with microphone by socket, the output of described microphone audio amplifier circuit divides two-way, the flat cable of leading up to is connected to control board, and the relay of separately leading up to is connected by the emergent audio-frequency bus in emergent interface socket and outside after connecting emergent audio control circuit; Described monitoring module comprises monitoring circuit, and the output of described monitoring circuit is connected with monitoring loudspeaker by socket, and the input of described monitoring circuit is connected with control board; Described power module comprises the first power transfer module and second source modular converter, the input of described the first power transfer module is connected with DC filter by socket, the output of described the first power transfer module is connected with the input of described second source modular converter, and the output of described second source modular converter is connected with the regulator block in control board; Described control board comprises control unit, sound card circuit and network interface card, described control unit is connected with the monitoring circuit in described sound card circuit, network interface card, regulator block and power supply and audio board respectively, described control unit is connected with metal key-press by socket, the output of described sound card circuit is connected with the input of monitoring circuit in power supply and audio board, the input of described sound card circuit is connected with the output of microphone audio amplifier circuit in described power supply and audio board, described network interface card is connected with network interface, and described control unit also accesses emergent output control signal.The IO interface of described control unit is also connected with LED light, 7 LED light complete respectively power supply, active and standby, network speed, network connects, volume controls deixis, directly be connected with control unit, described control unit is also connected with EEPROM by iic bus, for storing IP address, described control unit is also connected with jtag interface circuit, described metal key-press is four, built-in LED lamp, by control unit, controlled, when button is pressed, on the IO mouth level of the control unit that draws dragged down, complete identification, do antistatic simultaneously and process increase circuit reliability, sound card chip in described sound card circuit is UDA1341TS, band AD and DA, by IIS bus interface and L3 interface, be connected with control unit, complete the conversion of audio analog signals and audio digital signals, described network card chip is DP83848C, by data/address bus, be connected with control unit on the one hand, by network isolation transformer H1102 and EMI device, be connected with outside netting twine on the other hand, complete the transmission of networked physics layer, described microphone is moving-coil type, by CANNON seat, be inserted on the panel of control, by CH2.54-2 socket, connect power supply and audio board again.
The course of work of this example: during work, outside direct current 110V power supply provides DC110V general supply through DC wave filter for broadcasting box power supply and audio board, the first power transfer module and second source modular converter provide respectively DC24V and DC5V as power supply and audio board, control board circuit supply voltage, + 24V adopts Switching Power Supply TL20-110S24U conversion to generate, and output current is about 0.8A.+ 5V adopts Switching Power Supply LM2576 conversion to generate, and output current is about 3A.Produce-38dB audio frequency small-signal of moving-coil microphone is connected to power supply and audio board 2.54 sockets, through microphone audio amplifier circuit, generate 0dB signal, the flat cable of leading up to is connected to control board, through the control unit in control board, process, the relay of separately leading up to is connected with the emergent audio-frequency bus in outside by 3.96 emergent interface sockets after connecting emergent audio control circuit.3W monitoring loudspeaker is connected with power supply and audio board by 3.96 sockets, and the monitoring amplification chip in monitoring circuit is PAM8303DBSC, and the audio frequency input in monitoring circuit is provided by control board through Flat cable connector, and audio frequency output is exported through monitoring loudspeaker.When network breaks down, the audio broadcasting of microphone can be exported by reserved emergent audio control circuit, and simulated audio signal is output as 0dB, balance.In outside CAT5E UTP cable, TX+, TX-, RX+, RX-are connected with control board through 2.54 sockets, then are connected with network isolation transformer through EMI device, are connected afterwards by network interface card DP83848C with control unit STM32F207.Sound card chip UDA1341TS band AD and DA in sound card circuit, by IIS bus interface and L3 interface, be connected to control unit, complete the conversion of audio analog signals and audio digital signals, four metal key-press are connected with control board by four 2.54 sockets, by control unit, controlled, when button is pressed, on the IO mouth level of the control unit that draws dragged down, complete identification, do antistatic simultaneously and process increase circuit reliability, the IO mouth of control unit is directly controlled 7 indicator lights, complete respectively power supply, active and standby, network speed, network connects, volume controls deixis.
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 (9)
1. a Broadcasting Control box circuit, it is characterized in that: a kind of Broadcasting Control box circuit, comprise power supply and audio board and control board, described power supply and audio board are connected with described control board, and described power supply and audio board comprise microphone module, monitor module and power module;
Described microphone module comprises microphone audio amplifier circuit, described microphone audio amplifier circuit is that two-stage is amplified, and the road of rationing the power supply is pressed in increase on the amplifying circuit of the second level, preventing that output signal is excessive causes distortion, the input of described microphone audio amplifier circuit is connected with microphone by socket, the output of described microphone audio amplifier circuit divides two-way, the flat cable of leading up to is connected to control board, and the relay of separately leading up to is connected by the emergent audio-frequency bus in emergent interface socket and outside after connecting emergent audio control circuit;
Described monitoring module comprises monitoring circuit, and the output of described monitoring circuit is connected with monitoring loudspeaker by socket, and the input of described monitoring circuit is connected with control board;
Described power module comprises the first power transfer module and second source modular converter, the input of described the first power transfer module is connected with DC filter by socket, the output of described the first power transfer module is connected with the input of described second source modular converter, and the output of described second source modular converter is connected with the regulator block in control board;
Described control board comprises control unit, sound card circuit and network interface card, described control unit is connected with the monitoring circuit in described sound card circuit, network interface card, regulator block and power supply and audio board respectively, described control unit is connected with metal key-press by socket, the output of described sound card circuit is connected with the input of monitoring circuit in power supply and audio board, the input of described sound card circuit is connected with the output of microphone audio amplifier circuit in described power supply and audio board, described network interface card is connected with network interface, and described control unit also accesses emergent output control signal.
2. a kind of Broadcasting Control box circuit according to claim 1, is characterized in that: the IO interface of described control unit is also connected with LED light.
3. a kind of Broadcasting Control box circuit according to claim 1 and 2, is characterized in that: described control unit is also connected with EEPROM by iic bus, for storing IP address.
4. a kind of Broadcasting Control box circuit according to claim 3, is characterized in that: described control unit is also connected with jtag interface circuit.
5. a kind of Broadcasting Control box circuit according to claim 1, is characterized in that: described metal key-press is four, and built-in LED lamp, is controlled by control unit.
6. a kind of Broadcasting Control box circuit according to claim 1, it is characterized in that: the sound card chip in described sound card circuit is UDA1341TS, band AD and DA, be connected with control unit by IIS bus interface and L3 interface, completes the conversion of audio analog signals and audio digital signals.
7. a kind of Broadcasting Control box circuit according to claim 1, it is characterized in that: described network card chip is DP83848C, by data/address bus, be connected with control unit on the one hand, by network isolation transformer H1102 and anti-electromagnetic interference device, be connected with outside netting twine on the other hand, complete the transmission of networked physics layer.
8. a kind of Broadcasting Control box circuit according to claim 1, is characterized in that: described microphone is moving-coil type, is inserted on the panel of control, then connects power supply and audio board by CH2.54-2 socket by CANNON seat.
9. a kind of Broadcasting Control box circuit according to claim 2, is characterized in that: described LED light is 7, completes that power supply, active and standby, network speed, network connect, volume controls deixis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320502659.8U CN203406886U (en) | 2013-08-15 | 2013-08-15 | Circuit of broadcast control box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320502659.8U CN203406886U (en) | 2013-08-15 | 2013-08-15 | Circuit of broadcast control box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203406886U true CN203406886U (en) | 2014-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320502659.8U Expired - Lifetime CN203406886U (en) | 2013-08-15 | 2013-08-15 | Circuit of broadcast control box |
Country Status (1)
| Country | Link |
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| CN (1) | CN203406886U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104869518A (en) * | 2015-06-04 | 2015-08-26 | 湖南康通电子科技有限公司 | Wall-mounted loud-speaking talkback terminal and loud-speaking talkback system |
| CN106506025A (en) * | 2016-12-29 | 2017-03-15 | 帝信科技股份有限公司 | SIP intercoms |
-
2013
- 2013-08-15 CN CN201320502659.8U patent/CN203406886U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104869518A (en) * | 2015-06-04 | 2015-08-26 | 湖南康通电子科技有限公司 | Wall-mounted loud-speaking talkback terminal and loud-speaking talkback system |
| CN106506025A (en) * | 2016-12-29 | 2017-03-15 | 帝信科技股份有限公司 | SIP intercoms |
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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 |
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| CX01 | Expiry of patent term |