CN202652400U - Two-wire-system multi-channel signal superposition/separation system - Google Patents
Two-wire-system multi-channel signal superposition/separation system Download PDFInfo
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- CN202652400U CN202652400U CN2012202883566U CN201220288356U CN202652400U CN 202652400 U CN202652400 U CN 202652400U CN 2012202883566 U CN2012202883566 U CN 2012202883566U CN 201220288356 U CN201220288356 U CN 201220288356U CN 202652400 U CN202652400 U CN 202652400U
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Abstract
The utility model provides a two-wire-system multi-channel signal superposition/separation system and relates to the technical field of signal transmission technology. The two-wire-system multi-channel signal superposition/separation system is composed of a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a mixer and a separator. The two-wire-system multi-channel signal superposition/separation system is characterized in that the first channel is a 10 MHz bidirectional low-frequency channel capable of transmitting first channel audio and video, 485 control signals and small-power DC power source low-frequency signals forward or reversely. After video amplitude control and video modulation, the second channel and the fifth channel are mixed with signals of the first channel through the mixer on the mixer end and connected to the separator end through a video coaxial cable. The two-wire-system multi-channel signal superposition/separation system provided by the utility model can realize the transmission of second channel video, third channel video, fourth channel video and fifth channel video very simply through the video cable and is used for realizing the dilatation of neighboring monitoring points of a video monitoring system at low cost. No wire cables need to be added, the resource consumption is reduced and the construction difficulty is reduced. And front-end signals can be transmitted to a rear end and then transmitted back to a front end through the first channel. Thus, a debugging worker can know whether the system is normal or not at the front end.
Description
Technical field
The utility model relates to the signal transmission technology field, is specifically related to two-wire system multipath signal stack/piece-rate system.
Background technology
Along with the progress of science and technology and the raising of people's awareness of safety, now a lot of residential quarters, factories and miness, schools etc. all are equiped with supervisory control system, the position of supervising device and quantity are according to the residential quarter, factories and miness, the area of school etc. and actual conditions and decide, and be provided with the control room at the property management center, all supervising devices all carry out connecting communication with the control room, the signal that monitors is sent to terminal equipment in the control room, operating personnel according to circumstances send control signal by the control room to all or indivedual supervising device simultaneously, thereby form an information network, become the residential quarter, factories and miness, the supervisory control system of school etc.
In order to realize the communication transfer between supervising device and the control room, following several implementation is arranged at present:
(1) between control room and each supervising device all by twisted pair line connection, yet, use twisted-pair feeder to carry out communication, that the signal that at first need is transmitted is encoded, transfer to the other side after, decode again, just can normally read, also namely between control room and each supervising device, a cover coding/decoding apparatus need be set all, not only cause system huge, and cost is high, cost of manufacture is high, and since on the twisted-pair feeder signal transmitting attenuation more serious, therefore and be not suitable for the telecommunication transmission;
(2) be connected by video coaxial cable respectively between control room and each supervising device, although saved like this coding/decoding apparatus, yet still owing between control room and each supervising device, need configure respectively a video coaxial cable, and cause the high of cost of manufacture;
(3) another transmission means is to adopt popular now optical fiber, optical fiber is fast owing to transmission speed, capacity is large, reliability is high is widely used, yet, because the difficult access device that increases in the centre of optical fiber, so that in a single day supervisory control system is finished, change with regard to being difficult for again, cause access property poor, the scope of application is little.
Therefore, China Patent No. is 200910024528, and a kind of common cable video transmission system is provided, and it is with the splitter of each distributor in the system within same radio frequency cable connects machine room; China Patent No. is 200610031915, a kind of N-ISDN closed-circuit monitoring transmission system is disclosed, system's intermediate frequency modulator is connected distributor by a coaxial cable, two-way amplifier is arranged in the coaxial cable path, distributor is connected with the monitoring client integration of equipments successively with the all-channel demodulator, and the coaxial cable monitoring client also connects the monitoring client integration of equipments through data terminal controller; Also having China Patent No. is 200920137705, discloses a kind of co-cable transmission system for monitoring, also is to carry out the transmission of signal by a radio frequency coaxial-cable;
Although above-mentioned patent has solved the problem with a radio frequency line transmitting multi-path video signal, they have common defects, are exactly
1. must adopt radio frequency line, like this, when the original video supervisory control system is point-to-point when connecting by vision cable, when needing dilatation to 2 road to 5 tunnel video signal transmission, if use " co-cable transmission system " and " Integrated Service Digital Network transmission system ", radio frequency line of cloth again just, this is large or indoor fitted up engineered for difficulty of construction, still is not desirable solution;
2. each video camera place must arrange transmitter and distributor, and machine room arranges splitter;
3. the output of the input of reflector and demodulator does not have inevitable corresponding relation, need to arrange and debug during practical operation, could determine one by one corresponding relation;
4. lack reverse video channel, can't see the display effect of rear end the commissioning staff of front end.
The utility model content
Technical problem to be solved in the utility model is to improve that a kind of cost is low, and resource consumption is few, the two-wire system multipath signal stack/piece-rate system of easy construction.
Technical problem to be solved in the utility model realizes by the following technical solutions:
A kind of two-wire system multipath signal stack/piece-rate system, consisted of by first passage, second channel, third channel, four-way, Five-channel, blender and separator, it is characterized in that: described first passage is the two-way low channel of 10MHz, can transmit forward or backwards 1 road audio frequency, video, 485 control signals, small power DC power supply low frequency signal, in described blender end, second mixes with the first passage signal by blender through video amplitude control, video modulation to Five-channel, is connected to the separator end by a video coaxial cable.
Inner at described separator, first passage is exported/is inputted from the first port through low pass filter, second channel to the Five-channel is after high pass isolator, distribution isolator, tuner separate, export from the corresponding port, use single-chip microcomputer after separator powers on, to the turning device initialization, the turning device that the turning device that the turning device that makes the turning device of corresponding second channel be operated in DS1 channel, corresponding third channel is operated in DS2 channel, corresponding four-way is operated in DS3 channel, corresponding Five-channel is operated in the DS5 channel.
The vision carrier frequency of described second channel is 49.75MHz; The vision carrier frequency of third channel is 57.75MHz; The vision carrier frequency of four-way is 65.75MHz; The vision carrier frequency of Five-channel is 85.25MHz.
When the commissioning staff before front end debugging, debugged video camera can be connected to second any one port to Five-channel of blender, display is connected to the first port of blender; At the separator end port of correspondence is connected to the first port, like this commissioning staff whether just can observe whole system at front end normal, whether the angle of video camera, focal length, aperture appropriate.
The beneficial effects of the utility model are:
1. in the situation about relatively concentrating in the control point that needs dilatation, and dilatation quantity is in 1 to 4 point range, do not need splitter and distributor, must not use radio frequency cable yet, as long as utilize original vision cable just can realize the transmission of signal, do not need between blender and the separator really to accomplish rewiring.
2. the radio frequency of receiver turns video module and adopts common on the market turning device, technology maturation, process stabilizing, with low cost, the working method of turning device is controlled by single-chip microcomputer, does not need the user that each passage is carried out channel fix, makes system become the point-and-shoot system.
Process 3.1# passage need not carry out frequency displacement, both reduced cost, again can forward or oppositely transmit 485 control signals, audio signal, vision signal, low power power supply, be convenient to emergency maintenance and system debug.
Description of drawings
Fig. 1 is the utility model principle schematic.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, a kind of two-wire system multipath signal stack/piece-rate system, in the utility model, the 1# passage is the two-way low channel of 10MHz, can transmit forward or backwards the low frequency signals such as 1 road audio frequency, video, 485 control signals, small power DC power supply.In blender end, 2# to 5# passage is through video amplitude control, video modulation (vision carrier frequency: 2# passage-49.75MHz; 3# passage-57.75MHz; 4# passage-65.75MHz; 5# passage-85.25MHz) mix with the 1# channel signal by blender is connected to the separator end by video coaxial cable.
Inner at separator, from the output/input of 1# port, 2# to 5# from corresponding port output, uses single-chip microcomputer after separator powers on, to the turning device initialization after high pass isolator, distribution isolator, tuner separate to the 1# passage through low pass filter.The turning device that the turning device that the turning device that makes the turning device of corresponding 2# passage be operated in DS1 channel, corresponding 3# passage is operated in DS2 channel, corresponding 4# passage is operated in DS3 channel, corresponding 5# passage is operated in the DS5 channel.
When the commissioning staff before front end debugging, debugged video camera can be connected to any one port of the 2# to 5# of blender, display is connected to the 1# port of blender; At the separator end port of correspondence is connected to the 1# port, like this commissioning staff whether just can observe whole system at front end normal, whether the angle of video camera, focal length, aperture appropriate.
According to video coaxial cable standard GB/T14864-93, video coaxial cable SYV75-5 commonly used is that 200MHz is 20 ℃ of frequencies in the utility model, and decay is not more than 0.15dB/m.Divide table according to China tv channel frequency, the high band that transmits at video coaxial cable among the present invention is No. 5 channels of closed-circuit television, and highest frequency (containing sound accompaniment) is 92MHz.Can meet the demands with the transmission of SYV75-5 vision cable.
Above demonstration and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. two-wire system multipath signal stack/piece-rate system, consisted of by first passage, second channel, third channel, four-way, Five-channel, blender and separator, it is characterized in that: described first passage is the two-way low channel of 10MHz, can transmit forward or backwards 1 road audio frequency, video, 485 control signals, small power DC power supply low frequency signal, in described blender end, second mixes with the first passage signal by blender through video amplitude control, video modulation to Five-channel, is connected to the separator end by a video coaxial cable.
2. two-wire system multipath signal stack/piece-rate system according to claim 1, it is characterized in that: inner at described separator, first passage is exported/is inputted from the first port through low pass filter, second channel to the Five-channel is through the high pass isolator, distribute isolator, after tuner separates, export from the corresponding port, use single-chip microcomputer after separator powers on, to the turning device initialization, make the turning device of corresponding second channel be operated in the DS1 channel, the turning device of corresponding third channel is operated in the DS2 channel, the turning device of corresponding four-way is operated in the DS3 channel, the turning device of corresponding Five-channel is operated in the DS5 channel.
3. two-wire system multipath signal stack/piece-rate system according to claim 1, it is characterized in that: the vision carrier frequency of described second channel is 49.75MHz; The vision carrier frequency of third channel is 57.75MHz; The vision carrier frequency of four-way is 65.75MHz; The vision carrier frequency of Five-channel is 85.25MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202883566U CN202652400U (en) | 2012-06-18 | 2012-06-18 | Two-wire-system multi-channel signal superposition/separation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202883566U CN202652400U (en) | 2012-06-18 | 2012-06-18 | Two-wire-system multi-channel signal superposition/separation system |
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| Publication Number | Publication Date |
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| CN202652400U true CN202652400U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012202883566U Expired - Fee Related CN202652400U (en) | 2012-06-18 | 2012-06-18 | Two-wire-system multi-channel signal superposition/separation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102724473A (en) * | 2012-06-18 | 2012-10-10 | 安徽秋田电子有限公司 | Two-wire multichannel signal superposition/separation system |
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- 2012-06-18 CN CN2012202883566U patent/CN202652400U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102724473A (en) * | 2012-06-18 | 2012-10-10 | 安徽秋田电子有限公司 | Two-wire multichannel signal superposition/separation system |
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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: 20130102 Termination date: 20150618 |
|
| EXPY | Termination of patent right or utility model |