CN203590361U - Indoor visual interphone control system carrying out communication through externally connecting two signal lines - Google Patents
Indoor visual interphone control system carrying out communication through externally connecting two signal lines Download PDFInfo
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- CN203590361U CN203590361U CN201320754928.XU CN201320754928U CN203590361U CN 203590361 U CN203590361 U CN 203590361U CN 201320754928 U CN201320754928 U CN 201320754928U CN 203590361 U CN203590361 U CN 203590361U
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- demodulation module
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- 230000005236 sound signal Effects 0.000 claims abstract description 10
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- 238000005516 engineering process Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
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Abstract
The utility model discloses an indoor visual interphone control system carrying out communication through externally connecting two signal lines. The system comprises a control circuit board, a FM demodulation module, an audio talkback module, a high-pass filter, a display screen and a low-pass filter. The indoor visual interphone control system can carry out visible talkback communication with an outdoor visual interphone through the two signal lines. The outdoor visual interphone transmits an audio signal with a low signal frequency and a video signal with a high signal frequency to the indoor visual interphone control system. The FM demodulation module is used to demodulate video signals from video modulation signals on the two signal lines and output the video signals to the display screen so as to carry out display. Through the audio talkback module, the audio talkback with the outdoor visual interphone is realized.
Description
[technical field]
The indoor video intercom control system that the utility model relates to a kind of external two holding wires carries out communication.
[background technology]
At present, existing visible dialogue system wiring is complicated, and the video intercom communication of off-premises station and indoor set generally needs 1 tone frequency channel wire, 1 video coaxial line, 1 connection, wherein, tone frequency channel wire transmission of audio signal, video coaxial line transmission video signal, connection transmission of control signals, so, circuit line radical makes to install complicated more, easily make mistakes, be also not easy to postorder and safeguard, and consumptive material is many, installation cost is high.
Therefore, be necessary to address the above problem.
[utility model content]
The utility model has overcome the deficiency of above-mentioned technology, provide a kind of external two holding wires to carry out the indoor video intercom control system of communication, it can be by the video intercom communication of two holding wires realizations and outdoor video intercom, reduce wiring radical, made easy for installation and reduction installation cost.
For achieving the above object, the utility model has adopted following technical proposal:
A kind of external two holding wires carry out the indoor video intercom control system of communication, include control circuit board 1, the FM demodulation module 2 for demodulated video signal that controlled circuit board 1 is controlled, and the audio frequency intercommunication module 3 for carrying out audio frequency intercommunication with outdoor video intercom controlled of controlled circuit board 1, the signal input part of described FM demodulation module 2 is connected with high pass filter 4 and signal output part is connected with display screen 5, described audio frequency intercommunication module 3 audio signal input/output terminals are connected with low pass filter 6, after described high pass filter 4 one inputs are connected with low pass filter 6 one inputs for an external holding wire, after high pass filter 4 another inputs are connected with low pass filter 6 another inputs for external another root holding wire.
On described control circuit board 1, be also connected with and control button 7.
Described audio frequency intercommunication module 3 comprises voice modulation demodulation module 31 and is connected to microphone 32 and the loudspeaker 33 on voice modulation demodulation module 31, described voice modulation demodulation module 31 control signal inputs are connected with control circuit board 1 control signal output, and voice modulation demodulation module 31 audio signal input/output terminals are connected with low pass filter 6.
Compared with prior art, the beneficial effects of the utility model are:
1, the indoor video intercom control system of this case can be carried out video intercom communication by two holding wires and outdoor video intercom, outdoor video intercom by two holding wires by audio signal low signal frequency and the high video signal transmission of signal frequency on the indoor video intercom control system of this case, by FM demodulation module, video modulation signal on two holding wires is demodulated to vision signal and exports to display screen and show, audio frequency intercommunication by the realization of audio frequency intercommunication module with outdoor video intercom, so, indoor user by indoor video intercom control system, realize that life outdoor videos is watched and with the audio frequency intercommunication function of outdoor video intercom.
2, FM demodulation module is coupled to respectively on two holding wires by low pass filter by high pass filter, audio frequency intercommunication module, makes the signal transmitting on outside two holding wires not affect the normal work of FM demodulation module, audio frequency intercommunication module.
3, reduce wiring radical, made easy for installation and reduction installation cost.
[accompanying drawing explanation]
Fig. 1 is block diagram of the present utility model.
[embodiment]
Below in conjunction with accompanying drawing, by embodiment, the utility model feature and other correlated characteristic are described in further detail, so that technical staff's of the same trade understanding:
As shown in Figure 1, a kind of external two holding wires carry out the indoor video intercom control system of communication, include control circuit board 1, the FM demodulation module 2 for demodulated video signal that controlled circuit board 1 is controlled, and the audio frequency intercommunication module 3 for carrying out audio frequency intercommunication with outdoor video intercom controlled of controlled circuit board 1, the signal input part of described FM demodulation module 2 is connected with high pass filter 4 and signal output part is connected with display screen 5, described audio frequency intercommunication module 3 audio signal input/output terminals are connected with low pass filter 6, after described high pass filter 4 one inputs are connected with low pass filter 6 one inputs for an external holding wire, after high pass filter 4 another inputs are connected with low pass filter 6 another inputs for external another root holding wire.
On described control circuit board 1, be also connected with and control button 7.
Described audio frequency intercommunication module 3 comprises voice modulation demodulation module 31 and is connected to microphone 32 and the loudspeaker 33 on voice modulation demodulation module 31, described voice modulation demodulation module 31 control signal inputs are connected with control circuit board 1 control signal output, and voice modulation demodulation module 31 audio signal input/output terminals are connected with low pass filter 6.
As mentioned above, this case operation principle is as follows:
The indoor video intercom control system of this case can be carried out video intercom communication by two holding wires and outdoor video intercom, outdoor video intercom by two holding wires by audio signal low signal frequency and the high video signal transmission of signal frequency on the indoor video intercom control system of this case, by FM demodulation module 2, video modulation signal on two holding wires is demodulated to vision signal and exports to display screen 5 and show, audio frequency intercommunication by 3 realizations of audio frequency intercommunication module with outdoor video intercom, so, indoor user by indoor video intercom control system, realize that life outdoor videos is watched and with the audio frequency intercommunication function of outdoor video intercom.
This case FM demodulation module 2 is coupled to respectively on two holding wires by low pass filter by high pass filter, audio frequency intercommunication module 3, makes the signal transmitting on outside two holding wires not affect the normal work of FM demodulation module 2, audio frequency intercommunication module 3.
As mentioned above, what this case was protected is the indoor video intercom control system that a kind of external two holding wires carry out communication, and all technical schemes identical or close with this case structure all should be shown the protection range that falls into this case.
Claims (3)
1. the indoor video intercom control system that external two holding wires carry out communication, it is characterized in that including control circuit board (1), the FM demodulation module (2) for demodulated video signal that controlled circuit board (1) is controlled, and the audio frequency intercommunication module (3) for carrying out audio frequency intercommunication with outdoor video intercom controlled of controlled circuit board (1), the signal input part of described FM demodulation module (2) is connected with high pass filter (4) and signal output part is connected with display screen (5), described audio frequency intercommunication module (3) audio signal input/output terminal is connected with low pass filter (6), after described high pass filter (4) one inputs are connected with low pass filter (6) one inputs for an external holding wire, after another input of high pass filter (4) is connected with another input of low pass filter (6) for external another root holding wire.
2. the indoor video intercom control system that a kind of external two holding wires according to claim 1 carry out communication, is characterized in that being also connected with and controlling button (7) on described control circuit board (1).
3. the indoor video intercom control system that a kind of external two holding wires according to claim 1 carry out communication, it is characterized in that described audio frequency intercommunication module (3) comprises voice modulation demodulation module (31) and is connected to microphone (32) and the loudspeaker (33) on voice modulation demodulation module (31), described voice modulation demodulation module (31) control signal input is connected with control circuit board (1) control signal output, and voice modulation demodulation module (31) audio signal input/output terminal is connected with low pass filter (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320754928.XU CN203590361U (en) | 2013-11-25 | 2013-11-25 | Indoor visual interphone control system carrying out communication through externally connecting two signal lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320754928.XU CN203590361U (en) | 2013-11-25 | 2013-11-25 | Indoor visual interphone control system carrying out communication through externally connecting two signal lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203590361U true CN203590361U (en) | 2014-05-07 |
Family
ID=50588202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320754928.XU Expired - Fee Related CN203590361U (en) | 2013-11-25 | 2013-11-25 | Indoor visual interphone control system carrying out communication through externally connecting two signal lines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203590361U (en) |
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2013
- 2013-11-25 CN CN201320754928.XU patent/CN203590361U/en not_active Expired - Fee Related
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Legal Events
| 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: 20140507 |
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| CF01 | Termination of patent right due to non-payment of annual fee |