CN201066896Y - Video, audio and data coaxial transmission device - Google Patents
Video, audio and data coaxial transmission device Download PDFInfo
- Publication number
- CN201066896Y CN201066896Y CNU2007200072236U CN200720007223U CN201066896Y CN 201066896 Y CN201066896 Y CN 201066896Y CN U2007200072236 U CNU2007200072236 U CN U2007200072236U CN 200720007223 U CN200720007223 U CN 200720007223U CN 201066896 Y CN201066896 Y CN 201066896Y
- Authority
- CN
- China
- Prior art keywords
- signal
- data
- circuit
- coaxial cable
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The utility model relates to a communication transmission device, in particular to a communication transmission device which can transmit video, audio, data and power with only one coaxial cable. The utility model comprises a signal modulator, a coaxial cable and a signal demodulator. The input end of the coaxial cable is connected with the signal modulator which is used to modulate the audio and the data into modulated waves on a carrier to be sent to the coaxial cable. A receiving end of the coaxial cable is connected with a carrier relay amplifier and the signal demodulator which is used to demodulate the video, the audio and the data from the modulated waves. The hard problems of high cost and complicate construction caused by various cables used for the transmission of present video, audio, data and power signals are solved. The engineering cost and the maintenance cost are greatly lowered, the engineering construction structure is simplified and the working efficiency is improved.
Description
[technical field]
The utility model relates to a kind of communications device, especially can realize the communications device that can only use one coaxial cable to transmit simultaneously video, audio frequency, data and power supply.
[background technology]
In existing Engineering Projects, the transmission of small-signals such as video, audio frequency, data, power supply all is that a kind of signal uses an independent cable, be that vision signal uses video line transmission, an audio signal to use a signal wire transmits, data-signal to use a signal wire transmits, power supply to use the front end of single line slave unit to transfer to the end or the other end, when particularly distance is longer (as 1KM), cause engineering cost to increase considerably, below enumerate the case of 1 kilometer picture control configuration:
There is following shortcoming in prior art:
The use number of cables is many, equipment manufacturing cost is high, directly increases engineering cost;
Because the quantity of cable and equipment is many, causes system's maintenance cost height in use from now on;
Because number of cables causes the engineering construction auxiliary material to increase more and difficulty is big, and needs fused fiber splice, operation is required strongly professional, and will prolong the construction period.
[utility model content]
Technical problem to be solved in the utility model is to provide a kind of communications device that can only use a coaxial cable to transmit simultaneously video, audio frequency, data and power supply.
The utility model solves above-mentioned technical problem by the following technical programs:
Video, audio frequency, data and power supply comprise signal modulator, coaxial cable, demodulator of PM signal PM with the cable transmitting device; Described coaxial cable input connects described signal modulator, is used for that video, audio frequency and data-modulated are formed modulated wave on carrier wave and sends into coaxial cable, and the coaxial cable receiving terminal connects demodulator of PM signal PM, is used for video, audio frequency and data demodulates are come out.
The one or more carrier-current relaying amplifier of serial connection on the described coaxial cable circuit.Can extend transmission distance.
Described carrier-current relaying amplifier comprises a power amplification circuit, a power supply split circuit, power supply insertion circuit.
Described signal modulator comprises a power supply split circuit, a signal modulation circuit.
Described demodulator of PM signal PM comprises a power supply and inserts circuit, a signal demodulating circuit.
The utility model solves existing video, audio frequency, data and power supply signal and uses multiple cable transmission to cause the complicated difficult problem of the high construction of cost, reduces project cost and maintenance cost, simplification engineering construction structure greatly, increases work efficiency.Following plurality of advantages is arranged:
Use cable type quantity few, cost is low;
Equipment manufacturing cost is low, the same engineering cost that directly reduces;
Because the quantity of cable is few, so system line maintenance cost in use from now on is low;
Because equipment manufacturing cost is low, maintenance cost is low in use from now on equally;
Cable type quantity causes the engineering construction auxiliary material to reduce less, and it is more simple to construct, and will shorten the construction period.
[description of drawings]
In conjunction with specific embodiments the utility model being done one with reference to the accompanying drawings describes in detail.
Fig. 1 is the utility model structural representation.
Fig. 2 is a signal modulator fundamental diagram in the utility model.
Fig. 3 is a demodulator of PM signal PM fundamental diagram in the utility model.
Fig. 4 is a carrier-current relaying amplifier fundamental diagram in the utility model.
[embodiment]
See also Fig. 1, the utility model structural representation.Comprise signal modulator, coaxial cable, demodulator of PM signal PM; Described coaxial cable input connects described signal modulator, is used for that video, audio frequency and data-modulated are formed modulated wave on carrier wave and sends into coaxial cable, and the coaxial cable receiving terminal connects demodulator of PM signal PM, is used for video, audio frequency and data demodulates are come out.If want long-distance transmissions to be connected in series one or two carrier-current relaying amplifiers on the line as needing more than 300 meters, the circuit that can prolong 500 meters according to repeater of actual conditions designs.
The groundwork process is: modulation signal (as video, audio frequency, and data-signal) is modulated at (as being modulated on 38MHZ or other frequency) formation modulated wave on the carrier wave by signal modulator with modulation signal, is transferred to by coaxial cable and does not hold demodulated equipment.The power supply of headend equipment is to insert circuit through power supply power supply is inserted in coaxial cable and carrier wave implementation transmitted in both directions on demodulator section, power feed has arrived front end and with inductor power supply has been separated from cable to modulator and signal source energy is provided, demodulator is the modulated wave that coaxial cable transmits to be carried out demodulation be reduced into modulation signal, finally finishes the purpose with the small-signal long-distance transmissions.
Seeing also Fig. 2, is signal modulator fundamental diagram in the utility model.
Signal modulator comprises a power supply split circuit and a signal modulation circuit.
The power supply split circuit is mainly by inductance L 1, and regulator block integrated circuit U2, regulator block integrated circuit U3 form DC power-supply circuit; Wherein signal modulation circuit is mainly by modulating oscillation integrated circuit U1, crystal oscillator Y1, and resistance R 1, R2, R3, R5 and capacitor C 1, C2, C4, C5, C7, C6 form.
Power supply split circuit operation principle: the power supply split circuit is L1, U3, U2 forms DC power-supply circuit, its operation principle such as Fig. 2, B contact are exactly that coaxial cable connects and to hold the DC power supply connector by inductance L 1 direct current to be separated to offer the U3 regulator block and produce the 12V power supply and export road direction U2 power supply U2 voltage stabilizing output 5V by contact A.Feedback galvanic current source in another road direction headend equipment.
The signal modulation circuit operation principle: modulation signal is imported by contact C as (vision signal) and is passed through R2, the R3 dividing potential drop, 16 pin that C8 coupling is input to the U1 integrated package carry out the modulation to carrier wave, carrier wave is by external crystal Y1 of U1 and capacitor C 4, C9 forms oscillation circuit, produces high frequency carrier, and modulation signal passes through the modulation of the 16 pin input of U1 to carrier wave, modulated wave after the modulation is fed to coaxial cable by C5 at last and has been finished whole modulated process by the 15 pin output of U1.
Seeing also Fig. 3, is demodulator of PM signal PM fundamental diagram in the utility model.
Demodulator of PM signal PM comprises a power supply and inserts a circuit and a signal demodulating circuit.
Power supply inserts circuit and mainly is made up of inductance L 1; Wherein signal demodulating circuit is mainly by demodulation integrated circuit U1, resistance R 1, R2, R3, R4, R5, R6, R8, R9, and T1, T2, Q1, Q2, C2, C3, C4, C6, C8, C10, C11, C12 form.It is L1 that power supply inserts circuit, and DC power supply DC is by inductor L1 feed-in A linking point, and contact A is the tie point of direct current and high-frequency signal.Carrier signal is fed into demodulator circuit by C1, and the DC power supply of DC provides power supply by U2 regulator block output 12V direct current to the U1 demodulator circuit.
The demodulation amplifying circuit is mainly by demodulation integrated circuit U1, R1, R2, R3, R4, R5, R6, R8, R9, and T1, T2, Q1, Q2, C2, C3, C4, C6, C8, C10, C11, C12 form.Modulated wave is coupled to 1 of U2 through C1 and T1,16 pin, U2 circuit T2 frequency-selective circuit, they choose the down-conversion of modulated wave through (32MHZ-38MHZ) or up-conversion, go out modulating wave (as video, audio frequency and data-signal) from the output of 12 pin through the inner directly carrier detection of U1, more respectively by two emitter follower power amplifications at last to the terminal equipment transmission signals (as television set, display, computer etc.).
Seeing also Fig. 4, is carrier repeater fundamental diagram in the utility model.
The carrier-current relaying amplifier is mainly separated with power supply by signal amplification circuit and power supply insertion circuit is formed, their linking point has two, A point and B point, and the A point separates for power supply, direct current provides power supply by L1 branch descriscent U2 and L2, and the carrier signal that U1 amplifies is fed to the A point by C2.The B point inserts contact for power supply, and direct current is inserted into B point forward end by L2 and transmits power supply, and the carrier signal that front end imports into is amplified at 1 pin of B point by C1 input U1, and the signal after the amplification is exported by C2.
Power supply separates and inserts circuit: by L1 is the power supply split circuit, and L2 is that power supply inserts circuit
Contact A direct current offers the work of signal relay amplifier through U1 regulator block output 5V power supply again by L1, also will insert circuit as passing through L2 with power supply so also want feed for the direct current of also wanting forward end to provide power supply to be separated to cable.The direct current that L1 is separated is inserted in the coaxial cable by L2 again, mixes with carrier wave at the B point.
The operation principle of relaying amplifying circuit: U1, the signal amplifier bandwidth of L3 composition 20-40dB gain is that the 5-500MHZ modulated wave exports A point and Xiang Weiduan continuation transmission to by C2 again by the inner 20-40dB of amplification of 1 pin that C1 is input to U2.
The utility model provides a kind of new transmission equipment, its cost is 20% of an Optical Fiber Transmission, as same transmission 1Km line signal assessment cost cost, A: coaxial cable 1Km cost is 2000 yuan, B: signal modulation and power supply separator cost are 150 yuan, C: two 100 yuan of carrier repeaters, D: 200 yuan of signal demodulation and power inserters.Project total cost is 2450 yuan.
Project cost is low, and it is simple and convenient to construct, and with the transmission that a coaxial cable has solved signal and power feed, safeguards that simple relative maintenance cost is low.
Claims (5)
1. video, audio frequency, data and power supply is characterized in that with the cable transmitting device: comprise signal modulator, coaxial cable, demodulator of PM signal PM; Described coaxial cable input connects described signal modulator, is used for that video, audio frequency and data-modulated are formed modulated wave on carrier wave and sends into coaxial cable, and the coaxial cable receiving terminal connects demodulator of PM signal PM, is used for video, audio frequency and data demodulates are come out.
2. video as claimed in claim 1, audio frequency and data is characterized in that with the cable transmitting device: the one or more carrier-current relaying amplifier of serial connection on the described coaxial cable circuit.
3. video as claimed in claim 2, audio frequency and data is characterized in that with the cable transmitting device: described carrier-current relaying amplifier comprises a power amplification circuit, a power supply split circuit, power supply insertion circuit.
As claim 1 or 3 described videos, audio frequency and data with the cable transmitting device, it is characterized in that: described signal modulator comprises a power supply split circuit, a signal modulation circuit.
As claim 1 or 3 described videos, audio frequency and data with the cable transmitting device, it is characterized in that: described demodulator of PM signal PM comprises a power supply and inserts circuit, a signal demodulating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200072236U CN201066896Y (en) | 2007-05-30 | 2007-05-30 | Video, audio and data coaxial transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200072236U CN201066896Y (en) | 2007-05-30 | 2007-05-30 | Video, audio and data coaxial transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201066896Y true CN201066896Y (en) | 2008-05-28 |
Family
ID=39484081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200072236U Expired - Fee Related CN201066896Y (en) | 2007-05-30 | 2007-05-30 | Video, audio and data coaxial transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201066896Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625075A (en) * | 2012-03-27 | 2012-08-01 | 苏州攀星光电科技有限公司 | Method and equipment for transmitting analog video signal and realizing long-distance power supply by network cables |
| CN102111602B (en) * | 2009-12-23 | 2014-09-24 | 康佳集团股份有限公司 | Circuit for realizing single wire transmission of audio and video signals |
-
2007
- 2007-05-30 CN CNU2007200072236U patent/CN201066896Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111602B (en) * | 2009-12-23 | 2014-09-24 | 康佳集团股份有限公司 | Circuit for realizing single wire transmission of audio and video signals |
| CN102625075A (en) * | 2012-03-27 | 2012-08-01 | 苏州攀星光电科技有限公司 | Method and equipment for transmitting analog video signal and realizing long-distance power supply by network cables |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103414516B (en) | Based on two-way wire/wireless mixed light cut-in method and the system of same/heterodyne detection | |
| CN202488591U (en) | High definition multimedia interface remote transmitting device | |
| CN201066896Y (en) | Video, audio and data coaxial transmission device | |
| CN209267209U (en) | A kind of charger | |
| CN105659132A (en) | Methods, circuits and optical cable assemblies for optical transmission of high-speed data and low-speed data | |
| CN104779975A (en) | A differential coupling communication device of high speed power line carrier system | |
| CN105322982A (en) | Differential coupled communication method applied to high-speed power line carrier (H-PLC) system | |
| CN204559568U (en) | A kind of differential couple communicator of high speed power line carrier system | |
| CN203166927U (en) | Bidirectional optical module | |
| CN105703803A (en) | Robot communication system based on electric power carrier wave technology and method | |
| CN204145508U (en) | Transmission L-band signal receiver | |
| CN203457168U (en) | Three-in-one intelligent integrated optical node equipment | |
| CN105790793A (en) | Multi-frequency point carrier host system for medium voltage carrier communication | |
| CN202353726U (en) | Eight-way video optical transceiver | |
| CN201976213U (en) | Cable television bidirectional optical network unit using 2.6GHz bandwidth adaptive uplink light emission | |
| CN201114546Y (en) | Industrial local installed TV monitoring system under a coal mine well | |
| CN102752049A (en) | Local area network applying plastic optical fiber (POF) networking as well as optical switchboard and photoconverters of local area network | |
| CN201491167U (en) | Novel bidirectional HFC wired network system | |
| CN101145845B (en) | Full duplex optical fiber radio communication base station without light source and modulator | |
| CN202551239U (en) | Optical workstation for cable television system | |
| CN205901746U (en) | Optic fibre repeater equipment | |
| CN204046613U (en) | Special photoelectric conversion communication apparatus is surely controlled in region | |
| CN204559581U (en) | Based on the optical network unit of co-axial cables transport ethernet signal | |
| CN203301509U (en) | Ethernet over coaxial cable-used three-in-one intelligent integrated optical node device | |
| CN217789679U (en) | Radio frequency high-bandwidth electric dimming receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Fuzhou Fuhai Electric Technology Co., Ltd. Assignor: Zhang Hehai|Ye Daocai Contract record no.: 2011350000111 Denomination of utility model: Video, audio and data coaxial transmission device Granted publication date: 20080528 License type: Exclusive License Record date: 20110617 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080528 Termination date: 20120530 |