Design Scheme of Jiawangyuan One-line Transmission with Same Cable.pdf 
1. Brief introduction of the scheme:
This plan is strictly based on the public safety industry standards of the People ’s Republic of China. We provide the best solution for "one line connection" with the same cable for real-time security monitoring and management of intelligent communities. The overall plan proposes that the front-end camera point uses the same cable "one line through" modulation device-the transmitter, the trunk transmission part uses the bus amplification device for transmission, and the central control part uses the multi-channel video demodulation device-the multi-channel receiver restores the image Processing, video display and recording parts adopt the best solution of digital hard disk storage and playback. This solution fully embodies the perfect combination of modern electronic technology, modern communication technology, modern control technology and modern computer technology. Its feature is that it adopts mature CATV technologies such as frequency division multiplexing and digital modulation frequency division multiplexing. The sound and control are all in one, and the image acquisition, transmission, monitoring, recording and management are integrated into an integrated monitoring system. The system is a bus structure networking method, which is simple in construction and wiring, shortens the construction period, improves the reliability of the system, and solves the problems of difficult wiring and long transmission distance of monitoring points in the community.
Second, the system design goals:
When designing the same-line "one-line communication" monitoring system, according to your company's basic requirements for the system, this framework is reasonable, safe and reliable, product mainstream, low cost, low maintenance as the starting point, and provide you with advanced , Safe, reliable and efficient system solutions.
3. System design basis and principles
1. Design basis:
The design of this plan is based on the conventional requirements of Party A, and follows the design specification requirements formulated by the following relevant national departments. mainly include:
â‘ JGJ / T16-92 "Code for Electrical Design of Civil Buildings"
â‘¡GB / T50314-2000 "Intelligent Building Design Standard"
â‘¢GB50174-93 "Code for Design of Computer Room"
â‘£GB50057-94 "Code for Design of Lightning Protection of Buildings"
⑤GBJ232-92 "Code for Construction and Acceptance of Electrical Installation Engineering"
â‘¥GB4943-95 "Safety of Information Technology Equipment (including Electrical Affairs Equipment)"
⑦GB / T75-94 "Technical Specifications for Safety Technical Precautions"
⑧GB50198-94 "Technical Specifications for Civil CCTV Surveillance TV System Engineering"
⑨ Community developer's overall requirements for CCTV monitoring system
2. Design principles:
This design is based on industry standards, combined with the specific conditions of the community, based on a reasonable structure, safe and reliable, mainstream product, low cost, and low maintenance, and provides you with advanced, safe, reliable, and efficient System solutions. Economics: For construction monitoring projects, superior performance and advanced technology are the primary choices, and economics cannot be ignored. We have fully taken this into consideration during the design, so that the system is advanced and simple, yet it is economical and reliable. The use of "one" cable for the transmission of dozens of monitoring signals can not only greatly reduce the cable and construction costs, and reduce the construction period by more than half, but also reduce the system maintenance costs, and improve the stability and anti-interference ability of the system.
Advanced: The system adopts today's advanced CATV two-way communication frequency division multiplexing technology, a common cable bus transmission method that combines multiple video signals into one, breaking the new pattern of traditional monitoring transmission wiring.
b. Reliability: The most important thing for a monitoring system is reliability. Once the system is paralyzed, the consequences will be unimaginable. Using a common cable bus, a monitoring system with hundreds of points can be solved with only a few buses. Reduces the number of cable nodes and reduces the possibility of failure. It is very convenient for our after-sales maintenance.
c. Anti-interference: In the monitoring system, interference is the "natural enemy" of video surveillance. In general, video interference is 0-6
The low frequency interference of MHz, and the common cable bus transmission method adopts the frequency shift method to make the signal transmission frequency outside the interference frequency, so it can effectively suppress low frequency interference and strong electrical interference, even when used in environments with strong interference sources such as power plants and coal mines. , Can also transmit high-definition, real-time monitoring images. And we can also use it as an anti-jamming device.
d. Expandability: simple expansion and smooth upgrade. The system design should fully consider the future development needs, and should have the possibility of expansion and upgrade of the reserve capacity. The common cable monitoring system has a bandwidth of 1000MHz. At present, only the bandwidth with the best image effect is within 200MHz. The common cable monitoring has enough expansion space. The bus topology structure, when adding monitoring points,
It is only necessary to connect the signal line to the system bus nearby, without a large amount of secondary wiring. For some monitoring and transformation projects, in the monitoring project where the coaxial video cable was originally installed, if you want to add a camera, move the monitoring room and the like, you can complete the increase of the camera without rewiring and taking the nearest line.
e. Normative: Since this system is a strict and comprehensive system, in the process of system design and construction, reference should be made to the standards and norms in all aspects, strictly abide by various technical regulations, and the system should be designed and constructed in a standardized manner.
5. Product Introduction
One-line transmitter
Two-way mainline accessor Four-way mainline accessor 8-way mainline accessor
One-line transmission equipment is used at the front end of the monitoring system, and one camera uses a fixed transmission terminal, which converts the video signal from the camera into a radio frequency signal through the main line accessor (the main line accessor is divided into two channels and three channels) , Four-way, five-way, six-way, eight-way, and sixteen-way) mix multiple one-wire transmitters into a SYWV coaxial cable and transmit them to the receiving end of the monitoring room. Multiple images can be transmitted in one line.
The one-line transmission terminal adopts microcomputer CPU adjustment control, PLL automatically detects the phase lock, to ensure that the output image is stable and does not drift, corresponding use before and after, without adjustment. The rear end can also be adjusted according to the front end number, which is simple and convenient.
Transmitter technical indicators:
1. Video input: 1V PP
2. Video output: 1V PP
3. Input and output impedance: 75Ω
4. RF output level: 115dB
5. Level adjustment: 20dB
6. Power supply voltage: DC +/- 12V 5%
7. Power consumption: 2W
8. Working temperature: -40 ℃ —— + 50 ℃
9. Dimensions: 105 (W) X 110 (D) X 33 (H),
One-line multi-channel receiver
The product's one-line multi-channel receiving end (respectively 4, 8, 12, 16, etc.) is set at the end of the monitoring system, and it consists of a radio frequency input port (one that is transmitted from the transmitter and the main line accessor RF cable connection), and multiple BNC video output ports (connected to the hard disk recorder and matrix). Transform the RF signal transmitted from the main line into a multi-channel video signal to ensure the consistency and synchronization of the signal, and output it to various hard disk recorders, matrix and other display devices. One-line multi-channel receiving end adopts microcomputer CPU to adjust and control. PLL automatically detects the phase lock to ensure that the output image is stable and does not drift. At the same time, four digital tubes display the channel number of each channel and the corresponding transmitter number. To make the one line communication monitoring equipment systematic and integrated.
Technical index:
4 receivers, 8 receivers, 12 receivers, 16 receivers
Input frequency range 38—860MHz 38—860MHz 38—860MHz 38—860MHz
RF input 72dB ± 3dB 72dB ± 3dB 78dB ± 3dB 78dB ± 3dB
Video signal to noise ratio ≥56dB ≥56dB ≥56dB ≥56dB
Video output 1V pp 1V pp 1V pp 1V pp
BNC video output port 4 BNC ports output 8 BNC ports output 12 BNC ports output 16 BNC ports output
Input and output impedance 75Ω 75Ω 75Ω 75Ω
Supply voltage AC220V ± 5% AC220V ± 5% DC5V ± 5% DC5V ± 5%
Working temperature -40 ℃ — + 50 ℃ -40 ℃ — + 50 ℃ -40 ℃ — + 50 ℃ -40 ℃ — + 50 ℃
Relative humidity 80% 80% 80% 80%
Dimensions 350mm (W) X280mm (L) X45mm (H)
350mm (W) X280mm (L) X45mm (H)
435mm (W) X300 (L) mmX45mm (H)
435mm (W) X300 (L) mmX45mm (H)
Seven, cable selection:
Note: In general system design, SYWV75-5 cable is used for branch cables within the range of 1-500 meters, and SYWV75-7 cable is used when it exceeds 500 meters.
SYWV75-5 cable is used within 500 meters of the system trunk line, SYWV75-7 cable is used within 500 meters to 2000 meters, and SYWV75-9 cable is used between 2000 meters and 3000 meters. SYWV75-12 cable is used when the trunk line exceeds 3000 meters. .
8. Technical support and after-sales service
With the highest goal of end user satisfaction, Jiawangyuan Company provides a full range of services for engineering companies and agents, including pre-sales program technical support, in-sale construction technical support and after-sales service, to ensure that users can get Jiawangyuan in every link The company's strong and thoughtful technical guarantee completely eliminates the worries of the contractors.
Nine, pre-sale technical support
â—‡ You are welcome to call at any time to make various consultations on the products of the first-line system. For users who intend to purchase the corresponding products, we will provide free technical explanation and engineering design to let users understand the functions, characteristics, program design and attention of the required products. Matters, conduct in-depth research according to specific needs, and propose the most cost-effective solution.
â—‡ If it is a combination use and purchase of multiple products, we will provide feasibility, practicability and economic analysis according to the different requirements of users in terms of function, price and product quality and provide valuable constructive opinions. A variety of standard budget plans are available for selection. If necessary, our engineers can go to the site for field investigation and design at any time to ensure that users have the most satisfactory solution for the same cable and one line.
â—‡ Freely open company product information and technical information to all engineering companies, and provide a variety of technical solution templates.
Ten. Technical support and service during sale
â—‡ For new users and engineering companies that need technical support, our company can send engineers to the user site for construction and installation technical guidance, and work with partners to formulate construction plans, organizational plans, guide equipment installation and debugging, software installation and debugging, and test system debugging. And at the end of the project, assist the cooperation to provide Party A with the system hardware and software manual, system test report, and completion information, and at the same time jointly train 1-3 operators of Party A with the partner.
â—‡ Jiawangyuan Company will conduct system product training for the construction personnel of the partner before construction, in order to understand the system products, and carry out installation training and debugging training during the construction process, so that the partner will eventually achieve the ability of independent design and independent construction After the project is completed, training on operation and use will be conducted to make them proficient in the use of system software and hardware in various application environments.
11. After-sales service
â—‡ Has become a user of Jiawangyuan Company, we will strictly abide by the agreement and relevant standards signed by both parties, to provide you with a full range of technical support and personnel operation training, daily maintenance and upgrades and other services.
â—‡ Establish a 24-hour service system to solve problems at any time for you and ensure that you can get fast and timely service.
â—‡ All products of Jiawangyuan Company are subject to lifetime maintenance system, and the quality is guaranteed by three guarantees. The warranty is free for one year. After the free warranty period, only the material cost fee is charged, and no maintenance fee is charged.
â—‡ We adhere to the "people-oriented, technology-led" corporate philosophy, in line with the "integrity, modesty" principle, to provide you with first-class products, perfect services, let us work together to promote China's monitoring business "digital, network "Rapid development.
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