CN202334740U - Two-way video multiplexer - Google Patents
Two-way video multiplexer Download PDFInfo
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- CN202334740U CN202334740U CN2011204456918U CN201120445691U CN202334740U CN 202334740 U CN202334740 U CN 202334740U CN 2011204456918 U CN2011204456918 U CN 2011204456918U CN 201120445691 U CN201120445691 U CN 201120445691U CN 202334740 U CN202334740 U CN 202334740U
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Abstract
The utility model relates to double-circuit video signal multiplexing equipment, in particular to a two-way video multiplexer. The two-way video multiplexer adopts the structure that a video input interface, a mixed signal output interface and a power input interface are arranged at a transmitting terminal; a mixed signal input interface, video signal output interfaces and a power input interface are arranged at the receiving terminal; the transmitting terminal comprises a first passage processing circuit and a second passage processing circuit; the receiving terminal comprises a corresponding first passage processing circuit and a corresponding second passage processing circuit; second-way video signal at the receiving terminal is output through a second-way video signal output interface after being processed by the second passage processing circuit; the second passage processing circuit at the receiving terminal comprises a filter circuit, a demodulation circuit and an amplifying circuit, and second-way video signal is input into the signal input terminal of the demodulation circuit after being subjected to filtering of the filter circuit and attenuation; output signal of the demodulation circuit is connected with the amplifying circuit; and the output terminal of the amplifying circuit is connected with the second-way video signal output interface. According to the utility model, two-way video signals are transmitted through one coaxial cable, the cable consumption is greatly reduced, the routing cost is reduced, and a multi-point monitoring security system is more scientific and concise.
Description
Technical field
The utility model relates to a kind of video signal transmission equipment, particularly relates to the multiplexing equipment of a kind of double loop vision signal.
Background technology
Present safe protection engineering construction spreads all over the every nook and cranny in city, for digital Construction and traffic, fire-fighting, the security administration in city provides great convenience.But to monitoring the more problem of counting in the security protection construction, all be to adopt point-to-point mode, because vision signal is through the man-to-man characteristic of use cable transmission of the same race before, through the cable transmission vision signal; So in the security protection construction project that monitoring is counted more, the wiring complicacy be inconvenient to construct, and the wire rod cost is higher in the video signal transmission process; And,, need rewiring, cabling if increase the position, control point for the safe protection engineering that has been in place; The quantities that needs is big, and, for decorating, fit up a new building; If destroy body of wall or the exterior trim accomplished already, be undoubtedly the troubling thing of part, the work that need coordinate all quarters concerned; Efficient is low, influences badly, and cost is high.
The utility model content
The utility model is not enough to prior art; Propose a kind of 2 road video multiplexers, make transmission of video signals can utilize a coaxial cable to transmit 2 tunnel vision signals, significantly reduced the cable use amount; Reduce wiring cost, improved the science and the terseness of multi-point monitoring safety-protection system.
The technical scheme that the utility model adopted:
A kind of two-way video multiplexer; Comprise transmitting terminal and receiving terminal; Transmitting terminal is provided with video input interface, mixed signal output interface and power input interface; Receiving terminal is provided with mixed signal input interface, video signal output interface and power input interface; Be connected with power supply processing circuit at transmitting terminal and receiving terminal with said power input interface, said transmitting terminal contains first passage treatment circuit and second channel treatment circuit, and receiving terminal contains corresponding first passage treatment circuit and second channel treatment circuit; Export through the second road video signal output interface (VOUT2) after the second tunnel vision signal process second channel processing circuit processes of said receiving terminal; The second channel treatment circuit of said receiving terminal comprises filter circuit, demodulator circuit and amplifying circuit, and the second tunnel vision signal is input to the signal input part of demodulator circuit after filter circuit filtering and signal attenuation; The output signal of demodulator circuit connects amplifying circuit, and the output of said amplifying circuit is connected with the second road video signal output interface (VOUT2).
Described two-way video multiplexer; Demodulator circuit in the second channel treatment circuit of receiving terminal adopts integrated circuit TDA9800T; The second tunnel vision signal inserts an amplifier behind resaistance-capacity coupling circuit and filter inductance (L1) and resistance (R1); Insert the signal input part (VIF1, VIF2) of integrated circuit TDA9800T then, the output signal of said TDA9800T inserts amplifying circuit, and the output of said amplifying circuit connects the second road video signal output interface (VOUT2).
Described two-way video multiplexer, the first passage treatment circuit of transmitting terminal and receiving terminal adopts band pass filter, the mixed of the first via vision signal of transmitting terminal after passing through modulation treatment with the second tunnel behind the band pass filter of 0～15Mhz; The first via vision signal of receiving terminal is exported from first via video output interface (VIDEO 1) behind the band pass filter of 0～15Mhz; The second channel treatment circuit of transmitting terminal comprises filter circuit, modulation circuit and amplifying circuit; The second tunnel vision signal is after filter circuit filtering; Be input to the signal input part of modulation circuit; The signal output part of modulation circuit connects the input of amplifying circuit, and the output of said amplifying circuit and first passage treatment circuit output signal connect transmitting terminal mixed signal output interface jointly.
Described two-way video multiplexer; Modulation circuit in the second channel treatment circuit adopts IC chip TA8637; Through the signal input part of coupling capacitance (C1) access IC chip TA8637, the signal output part of said TA8637 inserts the input of amplifying circuit to the second tunnel vision signal through a resaistance-capacity coupling circuit behind filter resistance (R1) and signal attenuator (VR1); 10, the 11 pin external clock circuit of TA8637.
Described two-way video multiplexer, power supply processing circuit are provided with the logical output interface of power ring, and being connected in parallel with said power input interface is provided with the power ring outgoing interface.
Described two-way video multiplexer, at transmitting terminal or receiving terminal, or transmitting terminal and receiving terminal be provided with lightning prevention circuit, connects a gas discharge tube (F1) over the ground at the radiofrequency signal output port of transmitting terminal or the RF signal input end mouth of receiving terminal.
The useful good effect of the utility model:
1, the utility model two-way video multiplexer
,Through video multiplex technology, transmitting terminal with 2 tunnel vision signals through equipment will be wherein 1 the tunnel modulate back realization multi-channel video on a cable is mixed in the back with a road straight-through vision signal transmission; Receiving terminal is reduced to original vision signal with the signal demodulation again and offers other equipment uses; Make that transmission of video signals can utilize a coaxial cable to transmit 2 tunnel vision signals in the supervisory control system; Significantly reduced the cable use amount; Reduce wiring cost, improved the science and the terseness of multi-point monitoring safety-protection system.
2, the utility model two-way video multiplexer
,For the old project reconstruction that increases the control point, can use old circuit without rewiring, reduced the difficulty and the engineering construction cost of engineering construction widely.The paces that promotion urban digital that can be strong is built reduce and drop into.
Description of drawings
Fig. 1: the utility model two-way video multiplexer transmitting terminal circuit block diagram;
Fig. 2: the utility model two-way video multiplexer receiving terminal circuit block diagram;
Fig. 3: the utility model two-way video multiplexer receiving terminal circuit schematic diagram;
Fig. 4: the utility model two-way video multiplexer receiving terminal power circuit principle figure;
Fig. 5: the utility model two-way video multiplexer transmitting terminal circuit theory diagrams.
Embodiment
Embodiment one: referring to Fig. 1, Fig. 2, Fig. 3.The utility model two-way video multiplexer; Comprise transmitting terminal and receiving terminal; Transmitting terminal is provided with video input interface, mixed signal output interface and power input interface; Receiving terminal is provided with mixed signal input interface, video signal output interface and power input interface; Be connected with power supply processing circuit at transmitting terminal and receiving terminal with said power input interface, it is characterized in that: said transmitting terminal contains first passage treatment circuit and second channel treatment circuit, and receiving terminal contains corresponding first passage treatment circuit and second channel treatment circuit; Export through the second road video signal output interface VOUT2 after the second tunnel vision signal process second channel processing circuit processes of said receiving terminal; The second channel treatment circuit of said receiving terminal comprises filter circuit, demodulator circuit and amplifying circuit, and the second tunnel vision signal is input to the signal input part of demodulator circuit after filter circuit filtering and signal attenuation; The output signal of demodulator circuit connects amplifying circuit, and the output of said amplifying circuit is connected with the second road video signal output interface VOUT2.
Transmitting terminal with 2 tunnel vision signals through equipment will be wherein 1 the tunnel modulate back realization multi-channel video on a cable is mixed in the back with a road straight-through vision signal transmission; Receiving terminal is reduced to original vision signal with the signal demodulation again and offers other equipment uses.
Embodiment two: referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5; The two-way video multiplexer of present embodiment; Different with embodiment one is: the demodulator circuit in the second channel treatment circuit of receiving terminal adopts circuit as shown in Figure 4; The second tunnel vision signal inserts an amplifier after resaistance-capacity coupling circuit and filter inductance L1 and resistance R 1; Insert signal input part VIF1, the VIF2 of integrated circuit TDA9800T then, the output signal of said TDA9800T inserts amplifying circuit, and the output of said amplifying circuit connects the second road video signal output interface VOUT2.
Shown in Figure 5 is the utility model two-way video multiplexer transmitting terminal circuit theory diagrams.
The utility model two-way video multiplexer, the first passage treatment circuit of transmitting terminal and receiving terminal adopts band pass filter, the mixed of the first via vision signal of transmitting terminal after passing through modulation treatment with the second tunnel behind the band pass filter of 0～15Mhz; The first via vision signal of receiving terminal is exported from first via video output interface VIDEO1 behind the band pass filter of 0～15Mhz; The second channel treatment circuit of transmitting terminal comprises filter circuit, modulation circuit and amplifying circuit; The second tunnel vision signal is after filter circuit filtering; Be input to the signal input part of modulation circuit; The signal output part of modulation circuit connects the input of amplifying circuit, and the output of said amplifying circuit and first passage treatment circuit output signal connect transmitting terminal mixed signal output interface jointly.
The utility model two-way video multiplexer; Modulation circuit in the second channel treatment circuit adopts IC chip TA8637; Through the signal input part of coupling capacitance C1 access IC chip TA8637, the signal output part of said TA8637 inserts the input of amplifying circuit to the second tunnel vision signal through a resaistance-capacity coupling circuit behind filter resistance R1 and signal attenuator VR1; 10, the 11 pin external clock circuit of TA8637.
Embodiment three: referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4; Fig. 5; The two-way video multiplexer of present embodiment, different with embodiment one or embodiment two is, uses for ease and reduces equipment cost; Or/and in the power supply processing circuit of receiving terminal, being connected in parallel with said power input interface is provided with the power ring outgoing interface at transmitting terminal.
The utility model two-way video multiplexer; For the enhancement apparatus performance; At transmitting terminal or receiving terminal, or transmitting terminal and receiving terminal be provided with lightning prevention circuit, connects a gas discharge tube F1 over the ground at the radiofrequency signal output port of transmitting terminal or the RF signal input end mouth of receiving terminal.
Claims (6)
1. two-way video multiplexer; Comprise transmitting terminal and receiving terminal; Transmitting terminal is provided with video input interface, mixed signal output interface and power input interface; Receiving terminal is provided with mixed signal input interface, video signal output interface and power input interface; Be connected with power supply processing circuit at transmitting terminal and receiving terminal with said power input interface, it is characterized in that: said transmitting terminal contains first passage treatment circuit and second channel treatment circuit, and receiving terminal contains corresponding first passage treatment circuit and second channel treatment circuit; Export through the second road video signal output interface (VOUT2) after the second tunnel vision signal process second channel processing circuit processes of said receiving terminal; The second channel treatment circuit of said receiving terminal comprises filter circuit, demodulator circuit and amplifying circuit, and the second tunnel vision signal is input to the signal input part of demodulator circuit after filter circuit filtering and signal attenuation; The output signal of demodulator circuit connects amplifying circuit, and the output of said amplifying circuit is connected with the second road video signal output interface (VOUT2).
2. two-way video multiplexer according to claim 1; It is characterized in that: the demodulator circuit in the second channel treatment circuit of receiving terminal adopts integrated circuit TDA9800T; The second tunnel vision signal inserts an amplifier behind resaistance-capacity coupling circuit and filter inductance (L1) and resistance (R1); Insert the signal input part (VIF1, VIF2) of integrated circuit TDA9800T then; The output signal of said TDA9800T inserts amplifying circuit, and the output of said amplifying circuit connects the second road video signal output interface (VOUT2).
3. two-way video multiplexer according to claim 1 and 2; It is characterized in that: the first passage treatment circuit of transmitting terminal and receiving terminal adopts band pass filter, the mixed of the first via vision signal of transmitting terminal after passing through modulation treatment with the second tunnel behind the band pass filter of 0～15Mhz; The first via vision signal of receiving terminal is exported from first via video output interface (VIDEO 1) behind the band pass filter of 0～15Mhz; The second channel treatment circuit of transmitting terminal comprises filter circuit, modulation circuit and amplifying circuit; The second tunnel vision signal is after filter circuit filtering; Be input to the signal input part of modulation circuit; The signal output part of modulation circuit connects the input of amplifying circuit, and the output of said amplifying circuit and first passage treatment circuit output signal connect transmitting terminal mixed signal output interface jointly.
4. two-way video multiplexer according to claim 3; It is characterized in that: the modulation circuit in the second channel treatment circuit adopts IC chip TA8637; Through the signal input part of coupling capacitance (C1) access IC chip TA8637, the signal output part of said TA8637 inserts the input of amplifying circuit to the second tunnel vision signal through a resaistance-capacity coupling circuit behind filter resistance (R1) and signal attenuator (VR1); 10, the 11 pin external clock circuit of TA8637.
5. according to claim 1,2 or 4 described two-way video multiplexers, it is characterized in that: power supply processing circuit is provided with the logical output interface of power ring, and being connected in parallel with said power input interface is provided with the power ring outgoing interface.
6. according to claim 1,2 or 4 described two-way video multiplexers; It is characterized in that: at transmitting terminal or receiving terminal; Or transmitting terminal and receiving terminal be provided with lightning prevention circuit, connects a gas discharge tube (F1) over the ground at the radiofrequency signal output port of transmitting terminal or the RF signal input end mouth of receiving terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204456918U CN202334740U (en) | 2011-11-11 | 2011-11-11 | Two-way video multiplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204456918U CN202334740U (en) | 2011-11-11 | 2011-11-11 | Two-way video multiplexer |
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| Publication Number | Publication Date |
|---|---|
| CN202334740U true CN202334740U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204456918U Expired - Fee Related CN202334740U (en) | 2011-11-11 | 2011-11-11 | Two-way video multiplexer |
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| CN (1) | CN202334740U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109783045A (en) * | 2018-12-27 | 2019-05-21 | 郑州云海信息技术有限公司 | A kind of VGA signaling protection system |
-
2011
- 2011-11-11 CN CN2011204456918U patent/CN202334740U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109783045A (en) * | 2018-12-27 | 2019-05-21 | 郑州云海信息技术有限公司 | A kind of VGA signaling protection system |
| CN109783045B (en) * | 2018-12-27 | 2021-11-12 | 郑州云海信息技术有限公司 | VGA signal protection system |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20120711 Termination date: 20151111 |
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| EXPY | Termination of patent right or utility model |