CN203632786U - Remote distance transmission system for video signals - Google Patents
Remote distance transmission system for video signals Download PDFInfo
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- CN203632786U CN203632786U CN201320833835.6U CN201320833835U CN203632786U CN 203632786 U CN203632786 U CN 203632786U CN 201320833835 U CN201320833835 U CN 201320833835U CN 203632786 U CN203632786 U CN 203632786U
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Abstract
The utility model discloses a remote distance transmission system for video signals and belongs to the technical field of telecommunication transmission, and the problem of high cost of the remote distance transmission of the video signals in the prior art is solved. The remote distance transmission system comprises video signal sources, the video signal sources are connected with a signal converting circuit in series, the video signal sources are connected with a primary protection circuit in parallel via the transmission of a twisted pair, and the video signal sources are then connected with a signal inverse converting circuit in series, connected with a secondary TVS circuit and a filter circuit in parallel, finally connected with a signal amplification circuit in series, and is outputted to terminal reception equipment. According to the transmission system, the design is simple, the video transmission distance of the system is further than the distance of a coaxial cable without using a transferring device, and the signal integrity of the video signals is guaranteed.
Description
Technical field
The utility model belongs to telecommunication transmission technique field, specifically, is a kind of video signal long-distance transmission system that does not need middle transfer and energy denoising to amplify.
Background technology
In video acquisition, often need signal collecting device (the making a video recording first-class) signal collecting to be transferred to the terminal equipment of appointment, sometimes when collection point has exceeded traditional coaxial cable transmission range apart from terminal equipment distance, the signal quality of coaxial cable transmission will decline greatly, to such an extent as to affect display effect.Current remote solution is done another transfer often in the middle of transmission, comprising amplification, and squelch circuit, so transmission range will inevitably strengthen, but cost also can rise.Therefore need to be in order to add the transmission range of large-signal under alap cost, and ensure the signal to noise ratio of signal.
Summary of the invention
For the high deficiency of long-distance transmissions cost existing in prior art, the utility model provides a kind of low cost transmission circuit that can remote distance video transfer signal.
For realizing above-mentioned technical purpose, the technical solution adopted in the utility model is as follows:
A kind of video signal long-distance transmission system; comprise video signal source; described video signal source is connected with signaling conversion circuit; by in parallel with elementary protective circuit after Double-strand transmission; then connect with signal inverse conversion circuit; in parallel with secondary TVS circuit and filter circuit again, after finally connecting with signal amplification circuit, output to terminal receiving equipment.
Adopt the utility model of technique scheme, signaling conversion circuit is realized the extraction of signal by transmission inductance and divider resistance, be converted to differential signal transmit on twisted-pair feeder by collection signal, reduces the impact of outer signals; Signal arrives after receiving terminal, and inverse conversion circuit utilization transmission inductance and divider resistance carry out demodulation, finally obtains by filtering, amplification the vision signal that signal to noise ratio is high, and elementary protective circuit and secondary TVS circuit all can protective circuit elements.
Furthermore, described signaling conversion circuit and signal inverse transform circuit include transmission inductance and 5.1 kilohms of divider resistances.
Furthermore, described elementary protective circuit comprises esd protection circuit and elementary TVS circuit.Esd protection circuit is intended to absorb static, protection high voltage senser, and elementary TVS circuit can high voltage transient suppression, avoids damaging withstand voltage low element.
Furthermore, described filter circuit is formed in parallel by filter capacitor and build-out resistor.
Furthermore, described signal amplification circuit adopts SGM9115 operational amplifier.
A kind of video signal long-distance transmission system the utility model proposes; can do not use in transponder situation realize than coaxial cable farther transmission of video distance; not only ensure the integrality of vision signal, also prevented that by increasing corresponding protective circuit pressure-sensitive sensing unit is damaged.
Brief description of the drawings
Fig. 1 is schematic block circuit diagram of the present utility model;
Fig. 2 is the circuit diagram of the utility model specific embodiment.
Embodiment
In order to make those skilled in the art understand better the utility model, below in conjunction with drawings and Examples, technical solutions of the utility model are further illustrated.
As depicted in figs. 1 and 2; a kind of video signal long-distance transmission system; comprise video signal source 01; specific embodiment adopts three; and connect as follows: video signal source 01 is first connected with signaling conversion circuit 10, by parallel with elementary protective circuit 30 after twisted-pair feeder 20 transmission, then connect with signal inverse conversion circuit 40; in parallel with secondary TVS circuit 50 and filter circuit 60 again, after finally connecting with signal amplification circuit 70, output to terminal receiving equipment 80.
Below taking the transmitting procedure of a video signal source as example: signaling conversion circuit 10 comprises transmission inductance J1 and two 5.1K ohm divider resistance R1, R2, video signal source 01(is such as the data of camera collection) positive and negative terminal is connected respectively on two groups of coils of transmission inductance J1, utilize two 5.1 kilohms of divider resistance R1, R2 that signal is modulated into differential signal, to reduce the impact of outer signals; After twisted-pair feeder 20 transmission, differential signal first passes through elementary protective circuit 30, this elementary protective circuit 30 comprises esd protection circuit 31 and elementary TVS circuit 32, wherein esd protection circuit 31 absorbs static, protection high voltage Sensitive Apparatus, because signal is long Distance Transmission, has partial high pressure interference signal unavoidably in signal, elementary TVS circuit 32 can high voltage transient suppression, the withstand voltage low elements such as guard signal amplifying circuit 70; Then signal inverse conversion circuit 40 utilizes transmission inductance J2 and two 5.1 kilohms of divider resistance R3, R4 to carry out demodulation to differential signal again, obtains difference mode signal output; Then pass through successively secondary TVS circuit 50 and filter circuit 60, filter circuit 60 filtering high-frequency signals, wherein filter circuit is formed in parallel by filter capacitor C1 and build-out resistor R5; After finally amplifying by signal amplification circuit 70, output to terminal receiving equipment 80(such as ADC analog to digital converter), described signal amplification circuit adopts SGM9115 operational amplifier.
The video signal long-distance transmission system above the utility model being provided is described in detail.The explanation of specific embodiment is just for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection range of the utility model claim.
Claims (5)
1. a video signal long-distance transmission system; it is characterized in that; comprise video signal source; described video signal source is connected with signaling conversion circuit; by in parallel with elementary protective circuit after Double-strand transmission; then connect with signal inverse conversion circuit, more in parallel with secondary TVS circuit and filter circuit, after finally connecting with signal amplification circuit, output to terminal receiving equipment.
2. video signal long-distance transmission system according to claim 1, is characterized in that, described signaling conversion circuit and signal inverse transform circuit include transmission inductance and two 5.1 kilohms of divider resistances.
3. video signal long-distance transmission system according to claim 1, is characterized in that, described elementary protective circuit comprises esd protection circuit and elementary TVS circuit.
4. video signal long-distance transmission system according to claim 1, is characterized in that, described filter circuit is formed in parallel by filter capacitor and build-out resistor.
5. video signal long-distance transmission system according to claim 1, is characterized in that, described signal amplification circuit adopts SGM9115 operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320833835.6U CN203632786U (en) | 2013-12-18 | 2013-12-18 | Remote distance transmission system for video signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320833835.6U CN203632786U (en) | 2013-12-18 | 2013-12-18 | Remote distance transmission system for video signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203632786U true CN203632786U (en) | 2014-06-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320833835.6U Expired - Fee Related CN203632786U (en) | 2013-12-18 | 2013-12-18 | Remote distance transmission system for video signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203632786U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104460446A (en) * | 2014-11-19 | 2015-03-25 | 柳州航盛科技有限公司 | Intelligent pet feeding system |
| CN108111824A (en) * | 2015-07-24 | 2018-06-01 | 金钱猫科技股份有限公司 | A kind of long-distance video monitors Transmission system |
| CN113572915A (en) * | 2021-09-24 | 2021-10-29 | 聆笙(北京)科技有限公司 | Video signal long-distance transmission method, system, equipment and medium |
-
2013
- 2013-12-18 CN CN201320833835.6U patent/CN203632786U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104460446A (en) * | 2014-11-19 | 2015-03-25 | 柳州航盛科技有限公司 | Intelligent pet feeding system |
| CN108111824A (en) * | 2015-07-24 | 2018-06-01 | 金钱猫科技股份有限公司 | A kind of long-distance video monitors Transmission system |
| CN108111824B (en) * | 2015-07-24 | 2019-11-08 | 金钱猫科技股份有限公司 | A kind of long-distance video monitoring Transmission system |
| CN113572915A (en) * | 2021-09-24 | 2021-10-29 | 聆笙(北京)科技有限公司 | Video signal long-distance transmission method, system, equipment and medium |
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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: 20140604 Termination date: 20141218 |
|
| EXPY | Termination of patent right or utility model |