CN203406884U - Emergency broadcast control unit - Google Patents
Emergency broadcast control unit Download PDFInfo
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- CN203406884U CN203406884U CN201320502359.XU CN201320502359U CN203406884U CN 203406884 U CN203406884 U CN 203406884U CN 201320502359 U CN201320502359 U CN 201320502359U CN 203406884 U CN203406884 U CN 203406884U
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Abstract
The utility model provides an emergency broadcast control unit, which comprises a microphone module, a circuit audio module and a power supply module. A microphone audio signal source is inputted into the microphone module and then the microphone module is connected with the input end of a signal source selection module through an audio-amplification and voltage-limitation control module and a volume adjustment module. A three-way circuit audio signal source is inputted into the circuit audio module and then the circuit audio module is connected with the input end of the signal source selection module through an operational amplifier and the volume adjustment module. The output end of the signal source selection module is respectively connected with the input ends of a plurality of grouping selection modules. The output end of each grouping selection module is subjected to the operational amplifier to be outputted in the form of an emergency broadcast. According to the technical scheme of the utility model, the selection among signal sources for the audio input of a microphone and the audio input of a circuit can be realized by means of the signal source selection module. Meanwhile, a selected signal source is broadcasted to a selected grouped area by means of the grouping selection modules so as to realize the control over the emergency broadcasting process. The emergency broadcast control unit has the advantages of simple circuit design, easy and convenient operation, low manufacturing cost, easy mass production, and the like.
Description
Technical field
The utility model belongs to voice broadcast service field, especially relates to a kind of emergent broadcast control unit.
Background technology
Broadcasting for train, as a kind of special communication media bearing be passenger's service, policy propaganda, burst constantly commander speedily carry out rescue work, emergency evacuation, accident treatment with the task such as communicate by letter in time.Tradition emergent broadcast control appliance is backward in technique, compatible, autgmentability is not good, and circuit, structure are too complicated, and using method is complicated, and unreliable, exist install complicated, safeguard inconvenience, failure rate high-technology problem.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of simple in structure, easy to operate emergent broadcast control unit, is especially suitable for the control to emergent broadcast in railway network type broadcast system.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of emergent broadcast control unit, comprises microphone module, circuit audio-frequency module, power module, volume adjusting module, information source selection module and marshalling selection module;
Described microphone module comprises the input of two-way microphone audio frequency, described two-way microphone audio frequency input is amplified and is pressed limit control module to be connected with the input of described volume adjusting module by audio frequency after merging into a road microphone audio sources input by adder, and the output of described volume adjusting module selects the input of module to be connected by operational amplifier and described information source;
Described circuit audio-frequency module comprises the input of two-way circuit audio frequency, described two-way circuit audio frequency input accesses by six lotus flower sockets, two-way circuit audio frequency input on described every pair of lotus flower socket is connected with the input of described volume adjusting module by operational amplifier after merging into a route road audio sources input after adder, and the output of described volume adjusting module selects the input of module to be connected by operational amplifier and described information source;
Described microphone module selects the output of module to select the input of module to be connected with a plurality of marshallings respectively with the information source in circuit audio-frequency module, the output that module is selected in described each marshalling forms emergent broadcast after by operational amplifier and exports, described microphone module and to select the output signal of the operational amplifier that module is connected with information source in circuit audio-frequency module be normal broadcast output audio;
Further, in described microphone module, the output of operational amplifier is also connected with microphone volume indicating circuit.
Further, described microphone module selects the output of module to be also connected with broadcast volume indicating circuit with the information source in circuit audio-frequency module.
Further, described volume adjusting module is volume control potentiometer.
Further, described circuit audio-frequency module is one or more.
Further, it is 1 or a plurality of that module is selected in described marshalling, can expand according to actual needs.
Further, described power module comprises AC/DC module, and the output of described AC/DC module is connected with the input of three terminal regulator, and the output of described three terminal regulator is connected with the input of power indicating circuit.
Further, described three terminal regulator is L7805 and LM7905.
Further, the input of described AC/DC module is connected with insurance.
Advantage and the good effect that the utlity model has are: owing to adopting technique scheme, by information source select module can microphone audio frequency input and the input of circuit audio frequency carry out the selection of information source, by marshalling, select module to the marshalling region of choosing, to play selected information source, complete the control of emergent broadcast; There is circuit design simple, easy and simple to handle, low cost of manufacture, be beneficial to advantages such as quantizing production.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of emergent broadcast control unit of the utility model.
Embodiment
As shown in Figure 1, a kind of emergent broadcast control unit of the utility model, comprises microphone module, circuit audio-frequency module, power module, volume adjusting module, information source selection module and marshalling selection module;
Described microphone module comprises the input of two-way microphone audio frequency, described two-way microphone audio frequency input is amplified and is pressed limit control module to be connected with the input of described volume adjusting module by audio frequency after merging into a road microphone audio sources input by adder, the output of described volume adjusting module selects the input of module to be connected by operational amplifier and described information source, and the output of described operational amplifier is also connected with microphone volume indicating circuit;
Described circuit audio-frequency module comprises the input of two-way circuit audio frequency, described two-way circuit audio frequency input accesses by six lotus flower sockets, two-way circuit audio frequency input on described every pair of lotus flower socket is connected with the input of described volume adjusting module by operational amplifier after merging into a route road audio sources input after adder, the output of described volume adjusting module selects the input of module to be connected by operational amplifier and described information source, and described circuit audio-frequency module is one or more;
Described microphone module selects the output of module to select the input of module to be connected with broadcast volume indicating circuit with a plurality of marshallings respectively with the information source in circuit audio-frequency module, the output that module is selected in described each marshalling forms emergent broadcast after by operational amplifier and exports, the output signal of described microphone module and the operational amplifier being connected with information source selection module in circuit audio-frequency module is normal broadcast output audio, volume adjusting module in described microphone module and circuit audio-frequency module is volume control potentiometer, it is 1 or a plurality of that module is selected in described marshalling, can expand according to actual needs.
Described power module comprises AC/DC module, the input of described AC/DC module is connected with insurance, output is connected with the input of three terminal regulator, and the output of described three terminal regulator is connected with the input of power indicating circuit, and described three terminal regulator is L7805 and LM7905.
The course of work of this example: during emergent broadcast, the input of two-way microphone audio frequency is amplified and is pressed limit control module and volume adjusting module to enter information source and select module by audio frequency after being merged into a road microphone audio sources input by adder, six route road audio frequency inputs access by six lotus flower sockets, two-way circuit audio frequency input on every pair of lotus flower socket is inputted by merging into a route road audio sources after adder, therefore audio sources input in three-route road is selected module by entering information source after operational amplifier and volume adjusting module, four information sources select module to select four information sources of input, select STC89C58RD+ Single-chip Controlling relay to select information source, synchronization, can only select 1 tunnel information source, select in this embodiment 6 marshallings to select module to select the output signal of module to organize into groups to information source, synchronization, can select 1 road or multichannel marshalling, the corresponding 1 road emergent broadcast output of module is selected in each marshalling, each is organized into groups corresponding service area (or power amplifier) and determines by the mode of line at broadcast rack, in circuit, be provided with 4 tunnels and normally broadcast output channel, corresponding to 4 road audio frequency inputs (i.e. 1 road microphone and 3 route roads), audio frequency output while normally moving for system, no matter whether equipment is in emergency rating, 4 road audio frequency inputs are normally exported all in connected state with 4 tunnels, without carrying out information source and marshalling, select normally to export broadcast audio, in circuit, be provided with microphone and broadcast volume indicating circuit, indicator light when having the input of microphone audio frequency in microphone volume indicating circuit is lighted, the indicator light of broadcasting in volume indicating circuit when carrying out information source selection and the input of corresponding information source audio frequency is lighted.
Power module is selected the great safe power module of benefit, by the alternating current 220V power supply of input, by AC/DC module converts, is ± 12V then to select three terminal regulator L7805 and be converted to ± 5V of LM7905 general ± 12V working power.
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. an emergent broadcast control unit, is characterized in that: comprise microphone module, circuit audio-frequency module, power module, volume adjusting module, information source selection module and marshalling selection module;
Described microphone module comprises the input of two-way microphone audio frequency, described two-way microphone audio frequency input is amplified and is pressed limit control module to be connected with the input of described volume adjusting module by audio frequency after merging into a road microphone audio sources input by adder, and the output of described volume adjusting module selects the input of module to be connected by operational amplifier and described information source;
Described circuit audio-frequency module comprises the input of two-way circuit audio frequency, described two-way circuit audio frequency input is inputted by merging into a route road audio sources after adder, described circuit audio sources input is connected with the input of described volume adjusting module by operational amplifier, and the output of described volume adjusting module selects the input of module to be connected by operational amplifier and described information source;
Described microphone module selects the output of module to select the input of module to be connected with a plurality of marshallings respectively with the information source in circuit audio-frequency module, described a plurality of marshalling forms emergent broadcast after selecting output that each marshalling in module selects module by operational amplifier and exports, described microphone module and to select the output signal of the operational amplifier that module is connected with information source in circuit audio-frequency module be normal broadcast output audio.
2. a kind of emergent broadcast control unit according to claim 1, is characterized in that: in described microphone module, the output of operational amplifier is also connected with microphone volume indicating circuit.
3. a kind of emergent broadcast control unit according to claim 1, is characterized in that: described microphone module selects the output of module to be also connected with broadcast volume indicating circuit with the information source in circuit audio-frequency module.
4. a kind of emergent broadcast control unit according to claim 1, is characterized in that: described volume adjusting module is volume control potentiometer.
5. a kind of emergent broadcast control unit according to claim 1, is characterized in that: described circuit audio-frequency module is one or more.
6. a kind of emergent broadcast control unit according to claim 1, is characterized in that: it is 1 or a plurality of that module is selected in described marshalling.
7. a kind of emergent broadcast control unit according to claim 1, it is characterized in that: described power module comprises AC/DC module, the output of described AC/DC module is connected with the input of three terminal regulator, and the output of described three terminal regulator is connected with the input of power indicating circuit.
8. a kind of emergent broadcast control unit according to claim 7, is characterized in that: described three terminal regulator is L7805 and LM7905.
9. a kind of emergent broadcast control unit according to claim 7, is characterized in that: the input of described AC/DC module is connected with insurance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320502359.XU CN203406884U (en) | 2013-08-15 | 2013-08-15 | Emergency broadcast control unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320502359.XU CN203406884U (en) | 2013-08-15 | 2013-08-15 | Emergency broadcast control unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203406884U true CN203406884U (en) | 2014-01-22 |
Family
ID=49942803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320502359.XU Expired - Lifetime CN203406884U (en) | 2013-08-15 | 2013-08-15 | Emergency broadcast control unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203406884U (en) |
-
2013
- 2013-08-15 CN CN201320502359.XU patent/CN203406884U/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 |
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| CX01 | Expiry of patent term |