CN204069169U - Three tunnel video loop go out power supply multiplexer - Google Patents
Three tunnel video loop go out power supply multiplexer Download PDFInfo
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- CN204069169U CN204069169U CN201420437815.1U CN201420437815U CN204069169U CN 204069169 U CN204069169 U CN 204069169U CN 201420437815 U CN201420437815 U CN 201420437815U CN 204069169 U CN204069169 U CN 204069169U
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- voltage stabilizing
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Abstract
The utility model discloses a kind of three tunnel video loop and go out power supply multiplexer, overcome in prior art, in safety monitoring video line and power line arranged apart, the problem that construction is inconvenient and wire rod cost is higher.This utility model contains transmitting terminal and receiving terminal, receiving terminal is provided with 3 video signal output interfaces, power input interface and video power supply mixed signal input interface, transmitting terminal is provided with video power supply mixed signal input interface, 3 video signal input interface and power output interface, and described transmitting terminal contains 3 modulation circuits, split circuit, 5V voltage stabilizing circuit and 2 12V voltage stabilizing circuits; Receiving terminal contains buffer circuit, 3 demodulator circuits, protective circuit and 5V voltage stabilizing circuits.Power supply and video are passed through the equipment of video line or twisted-pair feeder or any two core cables transmission by this technology, reduce the use amount of cable, reduce wiring cost, improve the terseness of safety-protection system.
Description
Technical field
This utility model relates to the equipment that a kind of video and power supply transmit simultaneously, particularly relates to a kind of three road video power rings and goes out multiplexer.
Background technology
Current safe protection engineering construction spreads all over the every nook and cranny in city, for the digital Construction in city and traffic, fire-fighting, security administration provide great convenience.Before in security protection construction being all adopt point-to-point mode by cable transmission vision signal, video line and power line are arranged apart, and construction is inconvenient and wire rod cost is higher.If for already installed point-to-point supervision control engineering, if power line or video line damage, the body of wall needing destruction to complete or exterior trim carry out cabling again, this workload has done engineering on one side beyond doubt again, and the work that needs are coordinated all quarters concerned, and efficiency is low, affect bad, cost is high.Also this utility model can be used for power-supply wiring inconvenience in newly built construction.
Utility model content
The utility model overcomes in prior art, in safety monitoring video line and power line arranged apart, the problem that construction is inconvenient and wire rod cost is higher, provides a kind of three road video power rings easy to use to go out multiplexer.
Technical solution of the present utility model is, a kind of three road video power rings with following structure are provided to go out multiplexer: containing transmitting terminal and receiving terminal, receiving terminal is provided with 3 video signal output interfaces, power input interface and video power supply mixed signal input interface, transmitting terminal is provided with video power supply mixed signal input interface, 3 video signal input interface and power output interface, it is characterized in that: described transmitting terminal contains 3 modulation circuits, split circuit, 5V voltage stabilizing circuit and 2 12V voltage stabilizing circuits; Receiving terminal contains buffer circuit, 3 demodulator circuits, protective circuit and 5V voltage stabilizing circuits; Video input signals, respectively through 3 modulation circuits of transmitting terminal, after entering split circuit, is connected the buffer circuit of receiving terminal, then enters 3 demodulator circuits respectively, finally enter picture output device by cable; The input power of receiving terminal through protective circuit, then connects the split circuit of transmitting terminal by cable after entering buffer circuit, then enter 2 12V voltage stabilizing circuits simultaneously, is finally input to video input apparatus.
Described 3 modulation circuits are respectively 30M modulation circuit, 38M modulation circuit and 46M modulation circuit, and 3 demodulator circuits are respectively 30M demodulator circuit, 38M demodulator circuit and 46M demodulator circuit.
The chip model of the 12V voltage stabilizing circuit of described transmitting terminal is LM2576-12V, the chip model of 5V voltage stabilizing circuit is 78L05, the chip model of modulation circuit is MC44CC374, vision signal is by parallel with R53 after R52, R52 and L50, the pin 4 connecting the pin 8, MC44CC374 of MC44CC374 again through electric capacity C58 connects clock circuit.
The buffer circuit of described receiving terminal is made up of the low pass filter of a 15M L1, L2, L3 and C1, C2, the chip model of 5V voltage stabilizing circuit is 78L05, and the chip model of described demodulator circuit is LA7567.Described video input apparatus is camera, and picture output device is display.Described cable is coaxial cable, twisted-pair feeder, netting twine or power line.
Compared with prior art, the utility model three road video power ring goes out multiplexer and has the following advantages: equipment power supply and video being passed through video line or twisted-pair feeder or any two core cables transmission, reduce the use amount of cable, reduce wiring cost, improve the terseness of safety-protection system.
Accompanying drawing explanation
Fig. 1 is the transmitting terminal schematic diagram that the utility model three road video power ring goes out multiplexer;
Fig. 2 is the circuit diagram that the utility model three road video power ring goes out that multiplexer transmitting terminal 12V turns 5V circuit;
Fig. 3 is the circuit diagram that the utility model three road video power ring goes out multiplexer transmitting terminal 12V voltage stabilizing circuit;
Fig. 4 is the circuit diagram that the utility model three road video power ring goes out multiplexer transmitting terminal modulation circuit;
Fig. 5 is that the utility model three road video power ring goes out multiplexer receiving terminal schematic diagram;
Fig. 6 is the circuit diagram that the utility model three road video power ring goes out multiplexer receiving terminal buffer circuit;
Fig. 7 is the circuit diagram that the utility model three road video power ring goes out multiplexer receiving terminal protective circuit;
Fig. 8 is the circuit diagram that the utility model three road video power ring goes out multiplexer receiving terminal 5V voltage stabilizing circuit;
Fig. 9 is the circuit diagram that the utility model three road video power ring goes out multiplexer receiving terminal demodulator circuit.
Embodiment
Go out multiplexer below in conjunction with the drawings and specific embodiments to the utility model three road video power ring to be described further: as shown in the figure, the present embodiment contains transmitting terminal and receiving terminal, receiving terminal is provided with 3 video signal output interfaces, power input interface and video power supply mixed signal input interface, transmitting terminal is provided with video power supply mixed signal input interface, 3 video signal input interface and power output interface, it is characterized in that: described transmitting terminal contains 3 modulation circuits, split circuit, 5V voltage stabilizing circuit and 2 12V voltage stabilizing circuits; Receiving terminal contains buffer circuit, 3 demodulator circuits, protective circuit and 5V voltage stabilizing circuits; Video input signals, respectively through 3 modulation circuits of transmitting terminal, after entering split circuit, is connected the buffer circuit of receiving terminal, then enters 3 demodulator circuits respectively, finally enter picture output device by cable; The input power of receiving terminal through protective circuit, then connects the split circuit of transmitting terminal by cable after entering buffer circuit, then enter 2 12V voltage stabilizing circuits simultaneously, is finally input to video input apparatus.
Described 3 modulation circuits are respectively 30M modulation circuit, 38M modulation circuit and 46M modulation circuit, and 3 demodulator circuits are respectively 30M demodulator circuit, 38M demodulator circuit and 46M demodulator circuit.
The chip model of the 12V voltage stabilizing circuit of described transmitting terminal is LM2576-12V, the chip model of 5V voltage stabilizing circuit is 78L05, the chip model of modulation circuit is MC44CC374, vision signal is by parallel with R53 after R52, R52 and L50, the pin 4 connecting the pin 8, MC44CC374 of MC44CC374 again through electric capacity C58 connects clock circuit.
The buffer circuit of described receiving terminal is made up of the low pass filter of a 15M L1, L2, L3 and C1, C2, the chip model of 5V voltage stabilizing circuit is 78L05, and the chip model of described demodulator circuit is LA7567.Described video input apparatus is camera, and picture output device is display.Described cable is coaxial cable, twisted-pair feeder, netting twine or power line.
The technical scheme in the invention for solving the technical problem is: this product uses frequency division multiplexing, the technology such as bandpass filtering and low pass filter, by video is modulated at 30M respectively, the central point of 38M with 46M together with band pass filter by video and power sharing single line cable, 20-40V ground DC direct current is connected to supply socket at the receiving terminal of product, delivered to the transmitting terminal of product through power supply by cable, the high-performance of two each and every one NI is had inside transmitting terminal, a DC-DC ground chip of low-power consumption, by power good at 12V, this power supply exports two-way voltage on the one hand and directly powers to minimum 2 video cameras, can power on the one hand to the modulation circuit of itself, therefore can save video camera end ground adapter and arrive video camera end ground power line.Meanwhile the transmitting terminal of product passes through the receiving terminal of cable transmission before to product after the image of No. 3 video cameras being modulated to respectively the centre frequency of 30M, 38M and 46M, out, rear class display device is then being given by corresponding band pass filter and demodulator circuit correspondingly video demodulator after band pass filter.Future with cable allowing modulation ground vision signal and power supply signal without interruption same, be all added with low-pass filter circuit in the front stage of power circuit, better kept apart by both signals.In reality test, test 600 meters with the coaxial cable of 75-5, image meets the demands.
LM2576-12V and LM2576-12V-1 is delivered to respectively through J2 after receiving receiving terminal DC power supply input signal, the DC power supply producing two-way 12V exports, power on the one hand the multiple video camera of rear class, on the one hand wherein a road through LDO(U2 78L05) produce 5V voltage to digital modulation chip U50(MC44CC374) and single-chip microcomputer U1(STC15F104E) power.Enter signal input part 8 pin of U50 through J50 interface after receiving the vision signal of video camera, by the peripheral circuit of U50, vision signal is modulated at the centre frequency of 38M, exported by RF output 11 pin of U50, by interface J2, modulating video signal is gone by cable output after Q52 and peripheral composition ground amplifying circuit.The modulation circuit of 30M modulation circuit and 46M modulation circuit and 38M is similar, peripheral also substantially the same with rear class amplifying circuit;
LM2576 series is the 3A electric current output buck switching mode integrated stable voltage circuit that National Semiconductor produces; it includes fixed oscillator (52kHz) and benchmark pressurizer (1.23V); and there is perfect protective circuit; comprise current limit and Thermal shutdown circuit etc., utilize this device only to need few peripheral components just can form efficient voltage stabilizing circuit.
Claims (6)
1. a road video power ring goes out multiplexer, containing transmitting terminal and receiving terminal, receiving terminal is provided with 3 video signal output interfaces, power input interface and video power supply mixed signal input interface, transmitting terminal is provided with video power supply mixed signal input interface, 3 video signal input interface and power output interface, it is characterized in that: described transmitting terminal contains 3 modulation circuits, split circuit, 5V voltage stabilizing circuit and 2 12V voltage stabilizing circuits; Receiving terminal contains buffer circuit, 3 demodulator circuits, protective circuit and 5V voltage stabilizing circuits; Video input signals, respectively through 3 modulation circuits of transmitting terminal, after entering split circuit, is connected the buffer circuit of receiving terminal, then enters 3 demodulator circuits respectively, finally enter picture output device by cable; The input power of receiving terminal through protective circuit, then connects the split circuit of transmitting terminal by cable after entering buffer circuit, then enter 2 12V voltage stabilizing circuits simultaneously, is finally input to video input apparatus.
2. three road video power rings according to claim 1 go out multiplexer, it is characterized in that: described 3 modulation circuits are respectively 30M modulation circuit, 38M modulation circuit and 46M modulation circuit, 3 demodulator circuits are respectively 30M demodulator circuit, 38M demodulator circuit and 46M demodulator circuit.
3. three road video power rings according to claim 1 go out multiplexer, it is characterized in that: the chip model of the 12V voltage stabilizing circuit of described transmitting terminal is LM2576-12V, the chip model of 5V voltage stabilizing circuit is 78L05, the chip model of modulation circuit is MC44CC374, vision signal is by parallel with R53 after R52, R52 and L50, the pin 4 connecting the pin 8, MC44CC374 of MC44CC374 again through electric capacity C58 connects clock circuit.
4. three road video power rings according to claim 1 go out multiplexer, it is characterized in that: the buffer circuit of described receiving terminal is made up of the low pass filter of a 15M L1, L2, L3 and C1, C2, the chip model of 5V voltage stabilizing circuit is 78L05, and the chip model of described demodulator circuit is LA7567.
5. three road video power rings according to claim 1 go out multiplexer, and it is characterized in that: described video input apparatus is camera, picture output device is display.
6. three road video power rings according to claim 1 go out multiplexer, it is characterized in that: described cable is coaxial cable, twisted-pair feeder, netting twine or power line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420437815.1U CN204069169U (en) | 2014-08-05 | 2014-08-05 | Three tunnel video loop go out power supply multiplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420437815.1U CN204069169U (en) | 2014-08-05 | 2014-08-05 | Three tunnel video loop go out power supply multiplexer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204069169U true CN204069169U (en) | 2014-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420437815.1U Expired - Fee Related CN204069169U (en) | 2014-08-05 | 2014-08-05 | Three tunnel video loop go out power supply multiplexer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204069169U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019205514A1 (en) * | 2018-04-27 | 2019-10-31 | 京东方科技集团股份有限公司 | Connector for display device and display device |
-
2014
- 2014-08-05 CN CN201420437815.1U patent/CN204069169U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019205514A1 (en) * | 2018-04-27 | 2019-10-31 | 京东方科技集团股份有限公司 | Connector for display device and display device |
| US11295698B2 (en) | 2018-04-27 | 2022-04-05 | Beijing Boe Display Technology Co., Ltd. | Connector for display device and display device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20160805 |