CN215682455U - Equipment for simultaneously transmitting power supply and analog video signal - Google Patents
Equipment for simultaneously transmitting power supply and analog video signal Download PDFInfo
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- CN215682455U CN215682455U CN202121146284.7U CN202121146284U CN215682455U CN 215682455 U CN215682455 U CN 215682455U CN 202121146284 U CN202121146284 U CN 202121146284U CN 215682455 U CN215682455 U CN 215682455U
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Abstract
The utility model discloses equipment for simultaneously transmitting a power supply and an analog video signal, which comprises a coaxial camera, Balun power supply camera end equipment, a coaxial video recorder and 8-path Balun power supply transmission equipment, wherein the coaxial camera and the Balun power supply camera end equipment are electrically connected. The utility model can realize that a cable transmits signals and a power supply, the cable is a network cable, the coaxial signals transmitted by the network cable must be modulated by balun, the coaxial signals are modulated by balun and then are mixed with the power supply, the power supply is a safe power supply and is controlled below 58v, the power supply is started after the equipment is detected, the power supply is stopped after the equipment is disconnected, and the signals are transmitted together by the network cable and the power line, so that the material cost and the manual installation and maintenance cost of the cable can be greatly saved.
Description
Technical Field
The utility model relates to the technical field of transmission equipment, in particular to equipment for simultaneously transmitting a power supply and an analog video signal.
Background
At present, the coaxial security camera benefits the development of high-definition transmission standards, and the market delivery volume is continuously increased. At present, a power supply circuit and a signal circuit are transmitted through two independent cables (a coaxial cable and the power supply circuit, one coaxial cable is manufactured by manufacturers for transmitting signals and power supplies, the coaxial cable cannot realize high-power supply transmission, and the distance is limited so that the coaxial cable is basically abandoned by the market).
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art and provides a device for simultaneously transmitting a power supply and an analog video signal.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides an equipment that carries out power and analog video signal simultaneous transmission, includes coaxial camera, Balun power camera end equipment, coaxial video recorder and 8 way Balun power transmission equipment, through electric connection between coaxial camera, the Balun power camera end equipment, be connected to 8 way Balun power transmission equipment's tip between coaxial camera, the Balun power camera end equipment, be connected between 8 way Balun power transmission equipment and the coaxial video recorder.
As a further scheme of the present invention, the Balun power source camera end device is provided with 8 Balun power source interfaces, a coaxial camera signal interface and a camera power source interface, the 8 Balun power source interfaces are connected to the 8 Balun power source transmission devices, the camera power source interface is connected to a power source end of the coaxial camera, and the coaxial camera signal interface is connected to a signal end of the coaxial camera.
As a further scheme of the present invention, the 8-channel Balun power transmission equipment is provided with 1-4 channels of video signal output ports, 5-8 channels of video signal output ports, a connection status indicator lamp, a channel Balun power interface, and a power indicator lamp, the 1-4 channels of video signal output ports and the 5-8 channels of video signal output ports are respectively connected to a channel signal end on the Balun power camera end equipment, the connection status indicator lamp is correspondingly arranged with the 1-4 channels of video signal output ports and the 5-8 channels of video signal output ports, the channel Balun power interface is respectively connected to a channel power end on the Balun power camera end equipment, and the power indicator lamp is correspondingly arranged with the channel Balun power interface.
The utility model has the beneficial effects that: this equipment can realize a cable transmission signal and power, and the cable is the net twine, uses the net twine transmission coaxial signal must pass through balun modulation, and with the coaxial signal balun modulation back and power, the power is the safety power, controls below 58v, just begins the power supply after detecting equipment, stops the power supply after with equipment disconnection, transmits together through net twine and power cord, can practice thrift cable material expense and artifical installation maintenance cost in a large number.
Drawings
Fig. 1 is a connection block diagram of an apparatus for simultaneously transmitting a power supply and an analog video signal according to the present invention;
fig. 2 is a schematic structural diagram of an 8-channel Balun power transmission device for simultaneously transmitting a power supply and an analog video signal according to the present invention;
fig. 3 is a schematic structural diagram of a Balun power supply camera end device of a device for simultaneously transmitting a power supply and an analog video signal according to the present invention;
fig. 4 is a general diagram of a connection circuit of an apparatus for simultaneously transmitting a power supply and an analog video signal according to the present invention;
fig. 5 is a power control circuit diagram of an apparatus for performing simultaneous transmission of power and an analog video signal according to the present invention;
fig. 6 is a voltage-reducing circuit diagram of an apparatus for simultaneously transmitting a power source and an analog video signal according to the present invention.
In the figure: 1. a coaxial camera; 2. balun power supply camera end equipment; 21. 8-path Balun power interfaces; 22. a coaxial camera signal interface; 23. a camera power interface; 3. a coaxial video recorder; 4. 8-path Balun power transmission equipment; 41. 1-4 video signal output ports; 42. 5-8 video signal output ports; 43. a connection status indicator light; 44. 8-path Balun power interfaces; 45. a power indicator light.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-3, an apparatus for simultaneously transmitting power and analog video signals includes a coaxial camera 1, a Balun power camera end device 2, a coaxial video recorder 3, and an 8-channel Balun power transmission device 4, the coaxial camera 1 and the Balun power camera end device 2 are electrically connected, the coaxial camera 1 and the Balun power camera end device 2 are connected to an end of the 8-channel Balun power transmission device 4, the 8-channel Balun power transmission device 4 is connected to the coaxial video recorder 3, the Balun power camera end device 2 is provided with an 8-channel Balun power interface 21, a coaxial camera signal interface 22, and a camera power interface 23, the 8-channel Balun power interface 21 is connected to the 8-channel Balun power transmission device 4, the camera power interface 23 is connected to a power supply end of the coaxial video camera 1, the coaxial camera signal interface 22 is connected to a signal end of the coaxial video camera 1, the 8-channel Balun power transmission equipment 4 is provided with 1-4 channels of video signal output ports 41, 5-8 channels of video signal output ports 42, a connection state indicator lamp 43, 8 channels of Balun power interfaces 44 and a power indicator lamp 45, the 1-4 channels of video signal output ports 41 and 5-8 channels of video signal output ports 42 are respectively connected with 8 channels of signal ends on the Balun power camera end equipment 2, the connection state indicator lamp 43, the 1-4 channels of video signal output ports 41 and the 5-8 channels of video signal output ports 42 are correspondingly arranged, the 8 channels of Balun power interfaces 44 are respectively connected with 8 channels of power ends on the Balun power camera end equipment 2, and the power indicator lamp 45 and the 8 channels of Balun power interfaces 44 are correspondingly arranged.
Converting the coaxial analog video signal into differential analog video signal by using balun, and adding common-mode voltage
As shown in fig. 1, a coaxial analog camera is connected to the right side. The left side is connected with a coaxial analog video recorder. One cable (with two pairs of twisted wires) is used for transmission in the middle. T1, T2 convert the analog video signal coaxially and differentially. The center tap of T1, T2 adds a common mode voltage to the differential signal. Two twisted pair lines, one of which transmits a differential analog video signal with a common mode voltage. The other pair carries loop current.
Secondly, the power supply controller firstly detects the load identifier and then switches on the power supply to supply power
When the power supply controller is powered on, low voltage (such as 5V) is output, and the maximum current (such as 1 milliampere) is limited. When the lines are correctly connected, a low-voltage power supply is applied to a detection identification circuit at the camera end. In this example, 25K identification resistance is used.
When the input voltage of the voltage reduction circuit is low (for example, less than 20V), the voltage reduction circuit must be in a standby state, and no current is generated, so as to avoid influencing the power supply identification circuit.
When the power supply controller confirms that the far end is connected with the identification circuit through a low voltage method, power supply can be started. The power supply is typically at a higher voltage, such as 48V.
The load current should be continuously monitored after the power supply controller starts supplying power. And when the load current exceeds the set maximum value, judging that the load is short-circuited or overloaded. The power supply output should be cut off in time and the load identification detection restarted after a period of time.
When the power supply controller starts supplying power, the load current should be continuously monitored. And when the load current is lower than the set minimum value, judging that the load is disconnected. The power supply output should be cut off at this point and the load signature detection restarted after a period of time.
Three, eight port balun + power transmission equipment
The device shown in fig. 1 is a device which can realize signal and power transmission for 8-path (8 coaxial security cameras) coaxial cameras by respectively using a standard rj45 interface network cable. The system comprises 8 pieces of balun power transmission equipment with 8 ports and 8 pieces of balun power camera end equipment.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", "first", "second", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (3)
1. The utility model provides an equipment of carrying out power and analog video signal simultaneous transmission, includes coaxial camera (1), Balun power camera end equipment (2), coaxial video recorder (3) and 8 way Balun power transmission equipment (4), its characterized in that, through electric connection between coaxial camera (1), Balun power camera end equipment (2), be connected to the tip of 8 way Balun power transmission equipment (4) between coaxial camera (1), Balun power camera end equipment (2), be connected between 8 way Balun power transmission equipment (4) and the coaxial video recorder (3).
2. The apparatus for simultaneous transmission of power and analog video signals according to claim 1, wherein the Balun-based power camera end apparatus (2) is provided with 8 Balun power interfaces (21), a coaxial camera signal interface (22) and a camera power interface (23), the 8 Balun power interfaces (21) are connected to the 8 Balun-based power transmission apparatus (4), the camera power interface (23) is connected to a power end of the coaxial camera (1), and the coaxial camera signal interface (22) is connected to a signal end of the coaxial camera (1).
3. The device for simultaneously transmitting power and analog video signals according to claim 1, wherein the 8-channel Balun power transmission device (4) is provided with 1-4 video signal output ports (41), 5-8 video signal output ports (42), a connection status indicator lamp (43), 8-channel Balun power interfaces (44) and a power indicator lamp (45), the 1-4 video signal output ports (41) and 5-8 video signal output ports (42) are respectively connected with 8 signal terminals on the Balun power camera device (2), the connection status indicator lamp (43) is correspondingly arranged with the 1-4 video signal output ports (41) and the 5-8 video signal output ports (42), the 8-channel Balun power interfaces (44) are respectively connected with 8 power terminals on the Balun power camera device (2), the power indicator lamp (45) and the 8-path Balun power interface (44) are correspondingly arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121146284.7U CN215682455U (en) | 2021-05-26 | 2021-05-26 | Equipment for simultaneously transmitting power supply and analog video signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121146284.7U CN215682455U (en) | 2021-05-26 | 2021-05-26 | Equipment for simultaneously transmitting power supply and analog video signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215682455U true CN215682455U (en) | 2022-01-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121146284.7U Active CN215682455U (en) | 2021-05-26 | 2021-05-26 | Equipment for simultaneously transmitting power supply and analog video signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215682455U (en) |
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2021
- 2021-05-26 CN CN202121146284.7U patent/CN215682455U/en active Active
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