CN204145680U - Based on the Campus Broadcasting System of cable TV network - Google Patents
Based on the Campus Broadcasting System of cable TV network Download PDFInfo
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- CN204145680U CN204145680U CN201420684771.2U CN201420684771U CN204145680U CN 204145680 U CN204145680 U CN 204145680U CN 201420684771 U CN201420684771 U CN 201420684771U CN 204145680 U CN204145680 U CN 204145680U
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Abstract
A kind of Campus Broadcasting System based on cable TV network, be made up of control centre and playback terminal, described control centre and described playback terminal carry out communication by cable TV network in the school, described control centre includes the main control system, modulating unit, blender and the amplifier that connect successively, the input of described main control system connects PC supervisor by RS232 bus, the output of described amplifier is by the playback terminal in the school described in cable TV network connection, and the input of described modulating unit also connects source of sound unit by preamplifier; Described playback terminal includes the identical classroom terminal of n structure, n be greater than 1 integer.The utility model without the transmission network of deployment-specific, can with cable TV signal co-cable transmission, save a large amount of man power and materials, the heart just can manipulate each classroom terminal in the controlling, carry out intelligent broadcast, realize centralized control and the addressable broadcasting of broadcast, be applicable to very much school and use.
Description
Technical field
The utility model relates to a kind of Campus Broadcasting System.Particularly relate to a kind of Campus Broadcasting System based on cable TV network.
Background technology
Traditional Campus Broadcasting System is based on Public Address system, can only play a set of program source in the same period, can not carry out addressable broadcasting, and the broadcast simultaneously can not playing different content is suitable for different grades or the different classrooms demand in the same period.And school often needs different program source in different grades or different classrooms in the same period, or broadcasts some classrooms, does not broadcast some classrooms, and traditional Campus Broadcasting System can not meet at present needed for broadcast.
Summary of the invention
Technical problem to be solved in the utility model is, provide one in the controlling the heart just can manipulate each classroom terminal, broadcast, realize centralized control and the Campus Broadcasting System based on cable TV network of addressable broadcasting of broadcast.
The technical scheme that the utility model adopts is: a kind of Campus Broadcasting System based on cable TV network, be made up of control centre and playback terminal, described control centre and described playback terminal carry out communication by cable TV network in the school, described control centre includes the main control system connected successively, modulating unit, blender and amplifier, the input of described main control system connects PC supervisor by RS232 bus, the output of described amplifier is by the playback terminal in the school described in cable TV network connection, the input of described modulating unit also connects source of sound unit by preamplifier, described playback terminal includes the identical classroom terminal of n structure, n be greater than 1 integer.
Described source of sound unit includes 3 ~ 6 sources of sound, and described modulating unit includes 3 ~ 6 modulators corresponding with described source of sound number.
Described classroom terminal includes the demodulator that input is connected with the output of described amplifier by cable TV network and the audio amplifier be connected with the output of described demodulator.
Described main control system includes the level switch module, central processing unit and the output circuit that connect successively, wherein, the input of described level switch module connects PC supervisor by RS232 bus, and the output of described output circuit connects the input of modulating unit.
Described demodulator includes the demodulator circuit that input is connected with the output of described amplifier by cable TV network, the output of described demodulator circuit connects the signal input part of CPU module and audio amplifier module respectively, the control signal output of described CPU module also connects the control signal input of demodulator circuit, audio amplifier module and channel display module respectively, and the output of described audio amplifier module (314) connects audio amplifier.
Campus Broadcasting System based on cable TV network of the present utility model, transmission due to signal have employed cable TV network and transmits, and generally there is cable TV network in school, therefore without the transmission network of deployment-specific, can with cable TV signal co-cable transmission, save a large amount of man power and materials, the heart just can manipulate each classroom terminal in the controlling, carry out intelligent broadcast, realize centralized control and the addressable broadcasting of broadcast, be applicable to very much school and use.The utility model can by multichannel campus broadcasting information feed-in wideband multimedia television network coaxial cable, and common network transmits.By central machine room or classroom end all autonomous control systems of energy, because system has addressable function, campus can be set to several regions freely, zones of different plays different program source simultaneously, everything easily can complete on the PC computer of central machine room, achieves the intelligent management of Campus Broadcasting System.The utility model can realize following function:
1, can freely arrange broadcast area (embody in blocks, can divide 6 groups at most) according to the requirement of user, the sub-control in each region can rename.
2, multi-program-source can be realized, multizone is broadcasted simultaneously (can by program source number of channels determination play area, as different content broadcast can be carried out with time-division three regions in three programs sources.Such as: the same time, not of the same gradely different program is listened to).
3, the broadcast area of sub-control, the broadcasting channel of sub-control, the broadcast volume of sub-control, the on off state of sub-control can be set from the PC computer of central control room.
Accompanying drawing explanation
Fig. 1 is that the utility model entirety forms block diagram;
Fig. 2 is the formation block diagram of main control system;
Fig. 3 is the formation block diagram of classroom terminal.
In figure:
1: control centre 2: cable TV network
3: playback terminal 11:PC supervisor
12: main control system 13: source of sound unit
14: preamplifier 15: modulating unit
151: modulator 16: blender
17: amplifier 31: demodulator
32: audio amplifier 131: source of sound
121: level switch module 122: central processing unit
123: output circuit 311: demodulator circuit
312:CPU module 313: channel display module
314: audio amplifier module 315: power supply
Embodiment
Below in conjunction with embodiment and accompanying drawing, the Campus Broadcasting System based on cable TV network of the present utility model is described in detail.
As shown in Figure 1, Campus Broadcasting System based on cable TV network of the present invention, be made up of control centre 1 and playback terminal 3, described control centre 1 and described playback terminal 3 carry out communication by cable TV network 2 in the school, described control centre 1 includes the main control system 12 connected successively, modulating unit 15, blender 16 and amplifier 17, the input of described main control system 12 connects PC supervisor 11 by RS232 bus, the output of described amplifier 17 passes through cable TV network 2 in the school and connects described playback terminal 3, the input of described modulating unit 15 also connects source of sound unit 13 by preamplifier 14, the signal of main control system 12 signal and preamplifier 14 is modulated into the signal with cable TV frequency through modulating unit 15, form the signal transmission of a channel, described playback terminal 3 includes the identical classroom terminal of n structure, n be greater than 1 integer.
Described source of sound unit 13 includes 3 ~ 6 sources of sound 131, and described modulating unit 15 includes 3 ~ 6 modulators 151 corresponding with described source of sound 131 number.Described classroom terminal includes the demodulator 31 that input is connected with the output of described amplifier 17 by cable TV network 2 and the audio amplifier 32 be connected with the output of described demodulator 31.
As shown in Figure 2, described main control system 12 includes the level switch module 121, central processing unit 122 and the output circuit 123 that connect successively, wherein, the input of described level switch module 121 connects PC supervisor 11 by RS232 bus, and the output of described output circuit 123 connects the input of modulating unit 15.
As shown in Figure 3, described demodulator 31 includes the demodulator circuit 311 that input is connected with the output of described amplifier 17 by cable TV network 2, the output of described demodulator circuit 311 connects the signal input part of CPU module 312 and audio amplifier module 314 respectively, the control signal output of described CPU module 312 also connects the control signal input of demodulator circuit 311, audio amplifier module 314 and channel display module 313 respectively, and the output of described audio amplifier module 314 connects audio amplifier 32.
The course of work of the Campus Broadcasting System based on cable TV network of the present utility model is: level switch module 121 carries out communication transfer by RS232 bus and PC supervisor 11, the model of level switch module 121 is MAX232, the TX of level switch module 121 connects the RX end of central processing unit 122, broadcast control person is transferred to main control system 12 by the serial ports on PC supervisor 11 control command, level switch module 121 on main control system 12 receives transfer instruction and the Transistor-Transistor Logic level becoming central processing unit 122 to receive PC supervisor 11 serial port level conversion, central processing unit 122 by command to output circuit 123, instruction is outputted to modulating unit 151 by output circuit 123, modulating unit 151 outputs to blender 16 after high frequency modulated is carried out in instruction, signal mixing is carried out in blender 16.The signal of each source of sound in another part source of sound unit 13, after preamplifier 14, be transferred to the audio input end of corresponding modulator 151, modulator 151 outputs to blender 16 after audio signal is carried out high frequency modulated, carry out signal mixing, mixed Signal transmissions is carried out signal amplification to amplifier 17 by blender (16), and the signal after amplification outputs on cable TV network 2.
In classroom terminal 3, demodulator 31 is connected with cable TV network 2, receives modulated control command and the audio signal making cable TV signal that transmission comes.Demodulator circuit 311 in demodulator 31 becomes original control command and audio signal the signals revivification of modulation, control command is transferred to CPU module 312, audio signal transmission to audio frequency amplifier 314, CPU module 312 is according to control command, perform control demodulator circuit 311 open the channel of needs or close unwanted channel, also control the volume of audio amplifier module 314, audio amplifier module 314 exports and drives audio amplifier 32, finally realize the systemic-function of intelligent broadcast, the channel display of demodulator 31 is that CPU module 312 is according to the channel of the broadcast of control command display work and relevant information.
In embodiment of the present utility model, the model of described CPU module 312 is STC12C5A08 (or AT89C52, W78C58), the core component model of demodulator circuit 311 is TCL2002MB-3, and the volume control circuit core parts of audio amplifier module 314 are X9313 digital regulation resistance (or MCP41010).The numeral of TCL2002MB-3 exports and is connected with CPU module 312 serial ports RX, and carry out transmission control command, P1.2, P1.3 of CPU module 312 are connected with SDA, SCL of TCL2002MB-3, the channel that the TCL2002MB-3 controlling demodulator circuit 311 opens or closes.The AUDIO OUT of the TCL2002MB-3 of demodulator circuit 311 is connected with X9313 digital regulation resistance VH end, and P1.4, P1.5, P1.6 of CPU module 312 are connected with X9313 digital regulation resistance INC, U/D, CS end, perform and control volume operation.Described audio amplifier module 314 core parts are LM1875T, and its OUT end is connected with audio amplifier, drive audio amplifier to realize broadcast.Described channel display module 313 is by LED nixie display and drive triode to form, the P0.1 – P0.6 of CPU module 312 is connected with LED nixie display segment encode, P2.0, P2.1 of CPU module 312 are connected with the base stage of driving triode, drive the collector electrode of triode to be connected with LED nixie display bit code, CPU module 312 comes display of broadcast channel and relevant information by output segment encode and bit scan.
Claims (5)
1. the Campus Broadcasting System based on cable TV network, be made up of control centre (1) and playback terminal (3), it is characterized in that, described control centre (1) and described playback terminal (3) carry out communication by cable TV network (2) in the school, described control centre (1) includes the main control system (12) connected successively, modulating unit (15), blender (16) and amplifier (17), the input of described main control system (12) connects PC supervisor (11) by RS232 bus, the output of described amplifier (17) is by the playback terminal (3) in the school described in cable TV network (2) connection, the input of described modulating unit (15) also connects source of sound unit (13) by preamplifier (14), described playback terminal (3) includes the identical classroom terminal of n structure, n be greater than 1 integer.
2. the Campus Broadcasting System based on cable TV network according to claim 1, it is characterized in that, described source of sound unit (13) includes 3 ~ 6 sources of sound (131), and described modulating unit (15) includes 3 ~ 6 modulators (151) corresponding with described source of sound (131) number.
3. the Campus Broadcasting System based on cable TV network according to claim 1, it is characterized in that, described classroom terminal includes the demodulator (31) that input is connected with the output of described amplifier (17) by cable TV network (2) and the audio amplifier (32) be connected with the output of described demodulator (31).
4. the Campus Broadcasting System based on cable TV network according to claim 1, it is characterized in that, described main control system (12) includes the level switch module (121), central processing unit (122) and the output circuit (123) that connect successively, wherein, the input of described level switch module (121) connects PC supervisor (11) by RS232 bus, and the output of described output circuit (123) connects the input of modulating unit (15).
5. the Campus Broadcasting System based on cable TV network according to claim 3, it is characterized in that, described demodulator (31) includes the demodulator circuit (311) that input is connected with the output of described amplifier (17) by cable TV network (2), the output of described demodulator circuit (311) connects the signal input part of CPU module (312) and audio amplifier module (314) respectively, the control signal output of described CPU module (312) also connects demodulator circuit (311) respectively, the control signal input of audio amplifier module (314) and channel display module (313), the output of described audio amplifier module (314) connects audio amplifier (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420684771.2U CN204145680U (en) | 2014-11-14 | 2014-11-14 | Based on the Campus Broadcasting System of cable TV network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420684771.2U CN204145680U (en) | 2014-11-14 | 2014-11-14 | Based on the Campus Broadcasting System of cable TV network |
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| Publication Number | Publication Date |
|---|---|
| CN204145680U true CN204145680U (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420684771.2U Expired - Fee Related CN204145680U (en) | 2014-11-14 | 2014-11-14 | Based on the Campus Broadcasting System of cable TV network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111083290A (en) * | 2019-12-28 | 2020-04-28 | 深圳市长龙铁路电子工程有限公司 | Background music playing terminal and system |
-
2014
- 2014-11-14 CN CN201420684771.2U patent/CN204145680U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111083290A (en) * | 2019-12-28 | 2020-04-28 | 深圳市长龙铁路电子工程有限公司 | Background music playing terminal and system |
| CN111083290B (en) * | 2019-12-28 | 2024-02-27 | 深圳市长龙铁路电子工程有限公司 | Background music playing system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20191114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |