CN203352704U - Analog camera of simultaneously transmitting power and video signals through network cable - Google Patents
Analog camera of simultaneously transmitting power and video signals through network cable Download PDFInfo
- Publication number
- CN203352704U CN203352704U CN 201320362867 CN201320362867U CN203352704U CN 203352704 U CN203352704 U CN 203352704U CN 201320362867 CN201320362867 CN 201320362867 CN 201320362867 U CN201320362867 U CN 201320362867U CN 203352704 U CN203352704 U CN 203352704U
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- video
- netting twine
- interface
- conversion circuit
- power supply
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Abstract
The utility model provides an analog camera of simultaneously transmitting a power and video signals through a network cable. The analog camera includes a camera module and a passive video conversion circuit. The camera module generates a composite video broadcast signal; the camera module, which is sequentially through a first to a third twisted-pairs wires in the network cable and an RJ45 interface, is connected with a back-end device to obtain power; the passive video conversion circuit is connected with the camera module; the passive video conversion circuit, which is sequentially through a fourth twisted-pairs wire and the RJ45 interface in the network cable, is connected with the back-end device; and the passive video conversion circuit converts the composite video broadcast signal into a differential video signal, and transmits the differential video signal to the RJ45 interface through the fourth twisted-pairs wire. According to the utility model, the power and video signals can be simultaneously transmitted through one network cable; the wiring is simple; and since the differential signal with the great anti-interference ability is used for the transmission, the transmission distance can be extended.
Description
Technical field
The utility model relates to the video surveillance applications technology, particularly a kind of analog video camera that simultaneously transmits power supply and vision signal by netting twine.
Background technology
The most analog video camera adopts the coaxial cable transmission video signal, for transmission range, is 300 meters, adopts coaxial cable to carry out that laser propagation effect is bad and cost is high, and headend equipment needs external power supply to be powered simultaneously, connects up very loaded down with trivial details.
The utility model content
The purpose of this utility model is to provide a kind of analog video camera that simultaneously transmits power supply and vision signal by netting twine, can realize by a netting twine transmission of power supply and vision signal simultaneously, and wiring is simple.
For addressing the above problem, the utility model provides a kind of analog video camera that simultaneously transmits power supply and vision signal by netting twine, comprising:
Produce the camara module of composite video broadcast singal, described camara module is connected obtain power supply with the RJ45 interface with a rear end equipment by first to three pair of twisted-pair feeder in a netting twine successively;
The passive video conversion circuit be connected with described camara module, described passive video conversion circuit is connected with described rear end equipment with the RJ45 interface by the 4th pair of twisted-pair feeder in described netting twine successively, described passive video conversion circuit converts described composite video broadcast singal to difference video signal, and by described the 4th pair of twisted-pair feeder, described difference video signal is transferred to described RJ45 interface.
Further, in above-mentioned analog video camera, described passive video conversion circuit is the transmission of video transformer.
Further, in above-mentioned analog video camera, described power supply is the 12V direct voltage.
Further, in above-mentioned analog video camera, also comprise a power surge protection circuit, described camara module is connected with described RJ45 interface with first in netting twine to three pairs of twisted-pair feeders by described power surge protection circuit successively.
Further, in above-mentioned analog video camera, described power surge protection circuit comprises:
The fuse be connected with described RJ45 interface;
The counnter attack diode be connected with camara module with described fuse respectively;
The TVS pipe, an end is connected on the points of common connection of described fuse and counnter attack diode, other end ground connection.
Further, in above-mentioned analog video camera, also comprise a difference video port protection circuit, described passive video conversion circuit is connected with described RJ45 interface with the 4th pair of twisted-pair feeder in described netting twine by described difference video port protection circuit successively.
Further, in above-mentioned analog video camera, described difference video port protection circuit comprises:
Decoupling resistance, an end is connected with described passive video conversion circuit, and the other end is connected with described RJ45 interface;
The first discharge tube, an end is connected with the points of common connection of described passive video conversion circuit and decoupling resistance, other end ground connection;
The second discharge tube, an end is connected with the points of common connection of described RJ45 interface and decoupling resistance, other end ground connection.
Compared with prior art, the utility model is by producing the camara module of composite video broadcast singal, and described camara module is connected obtain power supply with the RJ45 interface with a rear end equipment by first to three pair of twisted-pair feeder in a netting twine successively, the passive video conversion circuit be connected with described camara module, described passive video conversion circuit is connected with described rear end equipment with the RJ45 interface by the 4th pair of twisted-pair feeder in described netting twine successively, described passive video conversion circuit converts described composite video broadcast singal to difference video signal, and by described the 4th pair of twisted-pair feeder, described difference video signal is transferred to described RJ45 interface, can realize by a netting twine transmission of power supply and vision signal simultaneously, wiring is simple, simultaneously owing to adopting the strong differential signal of antijamming capability to be transmitted, transmission range also can extend.
The accompanying drawing explanation
Fig. 1 is the structure chart that netting twine transmits the analog video camera of power supply and vision signal simultaneously that passes through of the utility model one embodiment;
Fig. 2 is the schematic diagram that the passive video conversion circuit of the utility model one embodiment is the transmission of video transformer;
Fig. 3 is the circuit diagram of the transmission of video transformer of the utility model one embodiment;
Fig. 4 is the power surge protection circuit schematic diagram of the utility model one embodiment;
Fig. 5 is the difference video port protection circuit schematic diagram of the utility model one embodiment;
Fig. 6 is the schematic diagram that the utility model one embodiment analog video camera is connected with rear end equipment.
Embodiment
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, the utility model provides a kind of analog video camera that simultaneously transmits power supply and vision signal by netting twine, comprises camara module 1 and passive video conversion circuit 2.
Produce the camara module 1 of composite video broadcast singal (CVBS signal), described camara module 1 is connected obtain power supply with RJ45 interface 5 with a rear end equipment 8 by first to three pair of twisted-pair feeder 3 in a netting twine successively.
Concrete, the CVBS signal is the standard be widely used, also be called base band video or RCA video, it is the conventional image data transmission method of (U.S.) NTSC (NTSC) TV signal, the CVBS signal transmits data with analog waveform, composite video comprises aberration (color harmony saturation) and brightness (light) information, and by aberration and monochrome information synchronously in blanking pulse, with same signal transmission.
Twisted-pair feeder is to form by the plain conductor of a pair of mutually insulated is stranded, twisted-pair feeder not only can be resisted the Electromagnetic Interference that a part comes from the outside, and can reduce the external interference of self signal, two copper conductors that thoroughly do away with edge are twisted together mutually by certain density, and the electric wave of wire radiation in transmission can be offset by the electric wave sent on another single line.
The passive video conversion circuit 2 be connected with described camara module 1, described passive video conversion circuit 2 is connected with described rear end equipment 5 with RJ45 interface 5 by the 4th pair of twisted-pair feeder 4 in described netting twine successively, described passive video conversion circuit 2 converts described composite video broadcast singal to difference video signal, and by described the 4th pair of twisted-pair feeder 4, described difference video signal is transferred to described RJ45 interface 5.The power supply that is camara module is to be the power supply of rear end equipment 5 through first to three pair of Double-strand transmission in netting twine by receiving terminal.
Concrete, difference video signal claims again difference mode signal, relative common-mode signal.Be different from the way of a traditional ground wire of a holding wire, differential signal signal transmission all on these two lines, the amplitude of these two signals equates, single spin-echo.The CVBS signal that described passive video conversion circuit 2 produces camara module 1 converts the strong difference video signal of antijamming capability that can adopt a pair of Double-strand transmission in netting twine to.
Optionally, as shown in Figure 2, described passive video conversion circuit 2 is the transmission of video transformer, and the circuit structure of concrete transmission of video transformer can be as shown in Figure 3.
Optionally, described power supply is 12V direct voltage (DC12V), and described camara module 1 adopts power supply DC12V, and rear end equipment 5 is supplied with video camera by netting twine by DC12V, makes camara module 1 obtain normal operating voltage, output CVBS signal.
Preferably, as shown in Fig. 4 and 6, described analog video camera also can comprise a power surge protection circuit 6, for carrying out carrying out surge protection, described camara module 1 is connected with described RJ45 interface 5 with first in netting twine to three pairs of twisted-pair feeders 3 by described power surge protection circuit 6 successively, wherein, single line in every pair of twisted-pair feeder in first to the three pair of twisted-pair feeder 3 can connect the 12V power supply, another single line ground connection in the every pair of twisted-pair feeder, three lines in first to the three pair of twisted-pair feeder connect 12V power supplys, another three line ground connection.
Preferably, as shown in Figure 4, described power surge protection circuit 6 comprises:
The fuse 61 be connected with described RJ45 interface 5;
The counnter attack diode 62 be connected with camara module 1 with described fuse 61 respectively;
TVS pipe 63, one ends are connected on the points of common connection of described fuse 61 and counnter attack diode 62, other end ground connection.
Preferably, as illustrated in Figures 5 and 6, described analog video camera also can comprise a difference video port protection circuit 7, and described passive video conversion circuit 2 is connected with described RJ45 interface 5 with the 4th pair of twisted-pair feeder 4 in described netting twine by described difference video port protection circuit 7 successively.
Preferably, as shown in Figure 5, described difference video port protection circuit 7 comprises:
Decoupling resistance 71, one ends are connected with described passive video conversion circuit 2, and the other end is connected with described RJ45 interface 5;
The first discharge tube 72, one ends are connected with the points of common connection of decoupling resistance 71 with described passive video conversion circuit 2, other end ground connection;
The second discharge tube 73, one ends are connected with the points of common connection of decoupling resistance 71 with described RJ45 interface 5, other end ground connection.
In sum, the utility model can just be realized the transmission of power supply and vision signal by a netting twine simultaneously, and wiring is simple, and owing to adopting the strong differential signal of antijamming capability to be transmitted, transmission range also can extend simultaneously.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.For the disclosed system of embodiment, owing to corresponding to the method disclosed in Example, so description is fairly simple, relevant part partly illustrates and gets final product referring to method.
Obviously, those skilled in the art can carry out various changes and modification and not break away from spirit and scope of the present utility model utility model.Like this, if, within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model also is intended to comprise these change and modification.
Claims (7)
1. an analog video camera that simultaneously transmits power supply and vision signal by netting twine, is characterized in that, comprising:
Produce the camara module of composite video broadcast singal, described camara module is connected obtain power supply with the RJ45 interface with a rear end equipment by first to three pair of twisted-pair feeder in a netting twine successively;
The passive video conversion circuit be connected with described camara module, described passive video conversion circuit is connected with described rear end equipment with the RJ45 interface by the 4th pair of twisted-pair feeder in described netting twine successively, described passive video conversion circuit converts described composite video broadcast singal to difference video signal, and by described the 4th pair of twisted-pair feeder, described difference video signal is transferred to described RJ45 interface.
2. the analog video camera that simultaneously transmits power supply and vision signal by netting twine as claimed in claim 1, is characterized in that, described passive video conversion circuit is the transmission of video transformer.
3. the analog video camera that simultaneously transmits power supply and vision signal by netting twine as claimed in claim 1, is characterized in that, described power supply is the 12V direct voltage.
4. the analog video camera that simultaneously transmits power supply and vision signal by netting twine as claimed in claim 1, it is characterized in that, also comprise a power surge protection circuit, described camara module is connected with described RJ45 interface with first in netting twine to three pairs of twisted-pair feeders by described power surge protection circuit successively.
5. the analog video camera that simultaneously transmits power supply and vision signal by netting twine as claimed in claim 4, is characterized in that, described power surge protection circuit comprises:
The fuse be connected with described RJ45 interface;
The counnter attack diode be connected with camara module with described fuse respectively;
The TVS pipe, an end is connected on the points of common connection of described fuse and counnter attack diode, other end ground connection.
6. the analog video camera that simultaneously transmits power supply and vision signal by netting twine as claimed in claim 1, it is characterized in that, also comprise a difference video port protection circuit, described passive video conversion circuit is connected with described RJ45 interface with the 4th pair of twisted-pair feeder in described netting twine by described difference video port protection circuit successively.
7. the analog video camera that simultaneously transmits power supply and vision signal by netting twine as claimed in claim 1, is characterized in that, described difference video port protection circuit comprises:
Decoupling resistance, an end is connected with described passive video conversion circuit, and the other end is connected with described RJ45 interface;
The first discharge tube, an end is connected with the points of common connection of described passive video conversion circuit and decoupling resistance, other end ground connection;
The second discharge tube, an end is connected with the points of common connection of described RJ45 interface and decoupling resistance, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320362867 CN203352704U (en) | 2013-06-21 | 2013-06-21 | Analog camera of simultaneously transmitting power and video signals through network cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320362867 CN203352704U (en) | 2013-06-21 | 2013-06-21 | Analog camera of simultaneously transmitting power and video signals through network cable |
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| Publication Number | Publication Date |
|---|---|
| CN203352704U true CN203352704U (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320362867 Expired - Lifetime CN203352704U (en) | 2013-06-21 | 2013-06-21 | Analog camera of simultaneously transmitting power and video signals through network cable |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104010164A (en) * | 2014-04-28 | 2014-08-27 | 东莞市世新网络科技有限公司 | Integrated service digital network camera shooting system and connecting method thereof |
| CN104333743A (en) * | 2014-11-25 | 2015-02-04 | 深圳市捷顺科技实业股份有限公司 | Video transmission device |
| CN113038056A (en) * | 2021-05-28 | 2021-06-25 | 智道网联科技(北京)有限公司 | Video data transmission circuit |
-
2013
- 2013-06-21 CN CN 201320362867 patent/CN203352704U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104010164A (en) * | 2014-04-28 | 2014-08-27 | 东莞市世新网络科技有限公司 | Integrated service digital network camera shooting system and connecting method thereof |
| CN104333743A (en) * | 2014-11-25 | 2015-02-04 | 深圳市捷顺科技实业股份有限公司 | Video transmission device |
| CN113038056A (en) * | 2021-05-28 | 2021-06-25 | 智道网联科技(北京)有限公司 | Video data transmission circuit |
| CN113038056B (en) * | 2021-05-28 | 2021-10-22 | 智道网联科技(北京)有限公司 | Video data transmission circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131218 |
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| CX01 | Expiry of patent term |