CN212909786U - Twisted-pair video transmission system - Google Patents
Twisted-pair video transmission system Download PDFInfo
- Publication number
- CN212909786U CN212909786U CN202021728838.XU CN202021728838U CN212909786U CN 212909786 U CN212909786 U CN 212909786U CN 202021728838 U CN202021728838 U CN 202021728838U CN 212909786 U CN212909786 U CN 212909786U
- Authority
- CN
- China
- Prior art keywords
- electrically connected
- impedance matching
- module
- electrical output
- gain
- 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.)
- Active
Links
Images
Landscapes
- Closed-Circuit Television Systems (AREA)
Abstract
The utility model discloses a twisted-pair video transmission system in the technical field of twisted-pair video transmission, the voltage stabilizer electrical output is connected with a filter capacitor circuit, the signal gain circuit comprises a differential signal receiver electrically connected with a networking switch, the differential signal receiver electrical output is connected with a primary impedance matching module, the primary impedance matching module electrical output is connected with a primary gain adjustment and frequency compensation module, the primary gain adjustment and frequency compensation module electrical output is connected with a gain amplification module, the gain amplification module electrical output is connected with an AC coupling capacitor, the AC coupling capacitor electrical output is connected with a secondary impedance matching module, the impedance matching and the amplification gain can be switched according to the communication distance, the debugging of video signal transmission is completed, the advantages of the traditional analog transmission and digital transmission are compatible, the digital control signal can not be interfered by external electromagnetic waves during transmission, the error code rate is extremely low, and the quality of control signals is improved.
Description
Technical Field
The utility model relates to a paired line video transmission technical field specifically is a paired line video transmission system.
Background
In the current building system, the video transmission modes are roughly divided into two types: one is analog signal transmission; the other is to convert the analog signal into digital signal for transmission. The analog signal transmission has the disadvantages of fast signal attenuation, short transmission distance, easy interference and expensive transmission medium, if twisted pair transmission is adopted, the impedance matching and amplification gain of a transmitting end and a receiving end needs to be adjusted simultaneously according to the difference of the transmission distance, so that the analog signal transmission is not suitable for transmitting and receiving among a large number of devices with uncertain distance, and in the transmission process of the existing devices, the transmission signal is easily interfered by external strong electromagnetic waves to generate error codes, thereby influencing the stability and reliability of monitoring.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a twisted-pair line video transmission system to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a twisted pair video transmission system comprises a video processing module, wherein the video processing module comprises a pickup, a camera and an alarm, the pickup, the camera and the alarm are all electrically connected with a modulator in output connection, the modulator is electrically connected with a twisted pair transmitter in output connection, the twisted pair transmitter is electrically connected with a networking switch in output connection, the networking switch is electrically connected with a signal gain circuit in output connection, the signal gain circuit is electrically connected with an administrator control end in output connection, the twisted pair transmitter comprises a voltage stabilizer electrically connected with the modulator, the voltage stabilizer is electrically connected with a filter capacitor circuit in output connection, the filter capacitor circuit is electrically connected with the networking switch in output connection, the signal gain circuit comprises a differential signal receiver electrically connected with the networking switch, and the differential signal receiver is electrically connected with a primary impedance matching module in output connection, the system comprises a primary impedance matching module, a primary gain adjusting and frequency compensating module, a gain amplifying module, an alternating current coupling capacitor, a secondary impedance matching module and a signal output end, wherein the primary impedance matching module is electrically connected with the primary gain adjusting and frequency compensating module in an output mode, the primary gain adjusting and frequency compensating module is electrically connected with the gain amplifying module in an output mode, the gain amplifying module is electrically connected with the alternating current coupling capacitor in an output mode, the alternating current coupling capacitor is electrically connected with the secondary impedance matching module in an output mode, and the secondary impedance matching.
Preferably, the administrator control end includes an administrator MCU320, and the administrator MCU320 is connected to the four switch control ends respectively.
Preferably, the first-stage impedance matching module includes a first resistor and a second resistor arranged in series, and a sum of resistances of the first resistor and the second resistor is equal to an impedance value of a twisted pair of the twisted pair transmitter.
Preferably, the twisted pair of the twisted pair transmitter includes a first branch line and a second branch line, the secondary impedance matching module is connected to a first end of the first branch line, the first resistor is connected to a second end of the first branch line, a first end and a second end of the second branch line are respectively connected to the ground signals of the sound pickup and the camera, and the second resistor is connected to the ground signal of the alarm.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the advantages of reasonable design, the modulator receives the video transmission signal from camera, adapter and alarm, the modulator can accomplish the modulation processing to the video transmission signal, and realize the voltage stabilization through the stabiliser, improve the signal transmission stability, reduce the electrical loss, improve the signal transmission efficiency, then after filtering through the filter capacitor circuit, can filter out the miscellaneous signal, the simultaneous transmission signal is converted into the differential signal by the twisted pair line transmitter, and the differential signal is transmitted to the networking switch through the twisted pair line transmitter, the networking switch can transmit the differential signal to the differential signal receiver, carry out impedance matching to the differential signal through the primary impedance matching module, then carry out gain adjustment according to the transmission distance by the primary gain adjustment and frequency compensation module, then amplify by the gain amplification module, simultaneously the AC coupling electric capacity can separate the primary gain adjustment from the frequency compensation module and the gain amplification module, the video transmission signal is filtered in the control end of the administrator, impedance matching, frequency compensation, gain adjustment and the like, so that the anti-interference capability of the video transmission signal is stronger, the signal is more stable, transmission is farther, impedance matching and amplification gain can be switched according to the communication distance, debugging of video signal transmission is completed, the advantages of traditional analog transmission and digital transmission are compatible, the digital control signal cannot be interfered by external electromagnetic waves during transmission, the error code rate is extremely low, and the quality of the control signal is improved.
Drawings
Fig. 1 is the whole working principle flow chart of the utility model.
In the figure: 1. a video processing module; 2. a sound pickup; 3. a camera; 4. an alarm; 5. a modulator; 6. a twisted pair transmitter; 7. a voltage regulator; 8. a filter capacitor circuit; 9. a networked switch; 10. a signal gain circuit; 11. a differential signal receiving end; 12. a first-stage gain adjustment and frequency compensation module; 13. a first-stage impedance matching module; 14. an AC coupling capacitor; 15. a secondary impedance matching module; 16. a gain amplification module; 17. a signal output terminal; 18. and an administrator control terminal.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a twisted-pair video transmission system comprises a video processing module 1, the video processing module 1 comprises a pickup 2, a camera 3 and an alarm 4, the pickup 2, the camera 3 and the alarm 4 are all electrically connected with a modulator 5, the modulator 5 is electrically connected with a twisted-pair transmitter 6, the twisted-pair transmitter 6 is electrically connected with a networking switch 9, the networking switch 9 is electrically connected with a signal gain circuit 10, the signal gain circuit 10 is electrically connected with a manager control terminal 18, the twisted-pair transmitter 6 comprises a voltage stabilizer 7 electrically connected with the modulator 5, the voltage stabilizer 7 is electrically connected with a filter capacitor circuit 8, the filter capacitor circuit 8 is electrically connected with the networking switch 9, the signal gain circuit 10 comprises a differential signal receiver 11 electrically connected with the networking switch 9, the differential signal receiver 11 is electrically connected with a primary impedance matching module 13, the first-stage impedance matching module 13 is electrically connected to the first-stage gain adjusting and frequency compensating module 12, the first-stage gain adjusting and frequency compensating module 12 is electrically connected to the gain amplifying module 16, the gain amplifying module 16 is electrically connected to the ac coupling capacitor 14, the ac coupling capacitor 14 is electrically connected to the second-stage impedance matching module 15, and the second-stage impedance matching module 15 is electrically connected to the signal output terminal 17 electrically connected to the administrator control terminal 18.
Referring to fig. 18, the administrator control terminal 18 includes an administrator MCU320, and the administrator MCU320 is connected to the four switch control terminals respectively;
referring to the figure, the first-stage impedance matching module includes a first resistor and a second resistor connected in series, and the sum of the resistances of the first resistor and the second resistor is equal to the impedance value of the twisted pair transmitter 6;
referring to the drawing, the twisted pair of the twisted pair transmitter 6 includes a first branch and a second branch, the second impedance matching module 15 is connected to a first end of the first branch, the first resistor is connected to a second end of the first branch, the first end and the second end of the second branch are respectively connected to the ground signals of the sound pickup 2 and the camera 3, and the second resistor is connected to the ground signal of the alarm 4.
The working principle is as follows: the modulator 5 receives video transmission signals from the camera 3, the sound pickup 2 and the alarm 4, the modulator 5 can perform modulation processing on the video transmission signals, voltage stabilization is achieved through the voltage stabilizer 7, signal transmission stability is improved, electric loss is reduced, signal transmission efficiency is improved, then after filtering is performed through the filter capacitor circuit 8, a noise signal can be filtered, meanwhile, the transmission signals are converted into differential signals through the twisted pair line transmitter 6, the differential signals are transmitted to the networking switch 9 through the twisted pair line transmitter 6, the networking switch 9 can transmit the differential signals to the differential signal receiver 11, impedance matching is performed on the differential signals through the primary impedance matching module 13, then gain adjustment is performed according to transmission distance through the primary gain adjustment and frequency compensation module 12, then amplification is performed through the gain amplification module 16, and meanwhile, the alternating current coupling capacitor 14 can separate the primary gain adjustment and frequency compensation module 12 from the gain amplification module 16 The video transmission signal is subjected to filtering, impedance matching, frequency compensation, gain adjustment and the like in the administrator control end 18, so that the anti-interference capability of the video transmission signal is stronger, the signal is more stable, the transmission is farther, the impedance matching and the amplification gain can be switched according to the communication distance, the debugging of video signal transmission is completed, the advantages of traditional analog transmission and digital transmission are compatible, the digital control signal cannot be subjected to interference of external electromagnetic waves during transmission, the error code rate is extremely low, and the quality of the control signal is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a twisted-pair video transmission system, includes video processing module (1), video processing module (1) includes adapter (2), camera (3) and alarm (4), its characterized in that: the sound pickup (2), the camera (3) and the alarm (4) are all electrically connected with a modulator (5), the modulator (5) is electrically connected with a twisted pair transmission device (6), the twisted pair transmission device (6) is electrically connected with a networking switch (9), the networking switch (9) is electrically connected with a signal gain circuit (10), the signal gain circuit (10) is electrically connected with an administrator control terminal (18), the twisted pair transmission device (6) comprises a voltage stabilizer (7) electrically connected with the modulator (5), the voltage stabilizer (7) is electrically connected with a filter capacitor circuit (8), the filter capacitor circuit (8) is electrically connected with the networking switch (9), and the signal gain circuit (10) comprises a differential signal receiver (11) electrically connected with the networking switch (9), the differential signal receiver (11) electrical output connects one-level impedance matching module (13), one-level impedance matching module (13) electrical output connects one-level gain adjustment and frequency compensation module (12), one-level gain adjustment and frequency compensation module (12) electrical output connects gain amplification module (16), gain amplification module (16) electrical output connects alternating current coupling electric capacity (14), alternating current coupling electric capacity (14) electrical output connects second level impedance matching module (15), second level impedance matching module (15) electrical output connects signal output part (17) with administrator control end (18) electrical connection.
2. The twisted pair video transmission system of claim 1, wherein: the administrator control end (18) comprises an administrator MCU320, and the administrator MCU320 is respectively connected with the four change-over switch control ends.
3. The twisted pair video transmission system of claim 1, wherein: the primary impedance matching module comprises a first resistor and a second resistor which are arranged in series, and the sum of the resistance values of the first resistor and the second resistor is equal to the impedance value of a twisted pair transmitter (6).
4. A twisted pair video transmission system according to claim 3, wherein: the twisted pair of the twisted pair transmitter (6) comprises a first branch line and a second branch line, the second-level impedance matching module (15) is connected to the first end of the first branch line, the first resistor is connected to the second end of the first branch line, the first end and the second end of the second branch line are respectively connected to the ground signals of the sound pickup (2) and the camera (3), and the second resistor is connected to the ground signal of the alarm (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021728838.XU CN212909786U (en) | 2020-08-18 | 2020-08-18 | Twisted-pair video transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021728838.XU CN212909786U (en) | 2020-08-18 | 2020-08-18 | Twisted-pair video transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212909786U true CN212909786U (en) | 2021-04-06 |
Family
ID=75247469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021728838.XU Active CN212909786U (en) | 2020-08-18 | 2020-08-18 | Twisted-pair video transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212909786U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113300742A (en) * | 2021-05-20 | 2021-08-24 | 思必驰科技股份有限公司 | Analog audio signal transmission device and method |
| CN117560460A (en) * | 2024-01-12 | 2024-02-13 | 杭州海康威视数字技术股份有限公司 | Conversion circuit for video analog signal transmission |
-
2020
- 2020-08-18 CN CN202021728838.XU patent/CN212909786U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113300742A (en) * | 2021-05-20 | 2021-08-24 | 思必驰科技股份有限公司 | Analog audio signal transmission device and method |
| CN117560460A (en) * | 2024-01-12 | 2024-02-13 | 杭州海康威视数字技术股份有限公司 | Conversion circuit for video analog signal transmission |
| CN117560460B (en) * | 2024-01-12 | 2024-04-09 | 杭州海康威视数字技术股份有限公司 | Conversion circuit for video analog signal transmission |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212909786U (en) | Twisted-pair video transmission system | |
| CN114362299A (en) | Coil current demodulation method and circuit based on wireless charging transmitting terminal | |
| US20040124996A1 (en) | Data transmission apparatus and method | |
| CN201878140U (en) | Low-voltage power line carrier communication module | |
| CN113691277B (en) | High-frequency short-wave high-suppression communication circuit | |
| CN202364227U (en) | Optical receiving module | |
| CN105049998A (en) | Audio communication device | |
| CN101916948B (en) | Blind-mating connection device in remote radio unit | |
| CN111181822B (en) | Amplitude adjusting circuit for transmitting electrical signal and amplitude adjusting circuit for receiving electrical signal | |
| CN113433463B (en) | Battery sensor relay unit supporting single-wire isolation communication | |
| CN115329520A (en) | Wide-range information transmission design method based on improved LCC compensation topological structure double resonance frequency points | |
| CN1655468B (en) | Adjustable echo eliminating apparatus for all duplex communication systems | |
| WO2002011377A9 (en) | Current mode transmission | |
| CN218499132U (en) | Circuit for remotely controlling outdoor LNA | |
| CN216930015U (en) | Power supply line frequency modulation carrier terminating machine | |
| CN211183950U (en) | Signal receiving and transmitting circuit based on balanced unbalanced radio frequency conversion component | |
| CN100499385C (en) | Mobile communication terminal | |
| CN220457407U (en) | Electric power and communication shared cable transmission architecture and electric surfboard | |
| CN218549928U (en) | Optical module and optical communication system | |
| CN214585673U (en) | Current transmission circuit for inhibiting grounding noise | |
| CN218734237U (en) | Uplink frequency sweeping circuit and signal processing device for LoRa base station | |
| CN210724791U (en) | Carrier communication circuit and concentrator | |
| EP1481488B1 (en) | TRANSMITTER/RECEIVER FOR BIDIRECTIONAL COMMUNICATIONS | |
| CN209283377U (en) | A kind of building Video transmission system | |
| CN211089126U (en) | Lightning protection impedance matcher |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |