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Design ideas for large and medium-sized network monitoring systems for reference
Share a design idea of ​​a large and medium-sized network monitoring system for reference:
Project Overview
The project has a total of 438 videos: 96 1.3 million pixel high-definition infrared high-speed dome cameras, 256 1.3 million pixel high-definition infrared camera cameras, and 86 1.3 million pixel high-definition infrared dome cameras. The back-end TV wall uses 16 46-inch splicing screens, and the main stream is stored 24 hours a day, 30 days.
Project Analysis
The five major parts of video acquisition system, video transmission system, video switching management system, video display system, and video recording system form a standard video surveillance system.
The video acquisition system mainly completes the acquisition of front-end image signals;
The video transmission control system completes the transmission and control communication of the front-end image signal;
The video switching management system completes the switching control and resource allocation of image signals;
The video display system completes the output of the terminal equipment of the front-end image signal;
The video recording system completes the long-delay storage and playback of the front-end image signal.
In system engineering, a good video transmission design is a very important part of the surveillance system. If a good system is built, all cameras, monitors, and video recorders with high indicators and high image quality are selected, but without a good transmission system, the final image seen on the monitor will not be satisfactory.
In a large-scale network monitoring system, how to route and wire, how to select switches, how to ensure smooth video of the entire network transmission system, and more convenient maintenance and management of the project. In many network video surveillance projects, because the configuration of the switch is not reasonable, the selection is not in place, and the bandwidth is insufficient, we often hear many complaints from customers, such as the lack of network cable support distance, and the phenomenon of dropped frames, freezes, and delays in images. , IP address understanding, understanding and planning is difficult, and network management personnel are in short supply. Especially the engineers have the deepest experience in this area.
Take the above situation as an example to talk about the configuration process of the entire project.
The project has a total of 438 videos: 96 1.3 million pixel high-definition infrared high-speed dome cameras, 256 1.3 million pixel high-definition infrared camera cameras, and 86 1.3 million pixel high-definition infrared dome cameras. The back-end TV wall uses 16 46-inch splicing screens, and the main stream is stored 24 hours a day, 30 days.
Video transmission part: Considering that the video points of this project are relatively scattered, in order to facilitate wiring and later system maintenance and management, we recommend the use of professional engineering switches with 300 meters transmission to customers. The front-end video is transmitted to the access layer switcher through the network In the monitoring center via optical fiber transmission.
Advantages of switches
1. 300m network transmission:
It highly solves the problem of relatively scattered cameras, and can transmit the videos with the synonymous gathering point farther together to the monitoring center at the same time, which indirectly saves the number of switches and the cost of the entire system.
2. Topology function:
After the networking is completed, all the video links of the entire project of the entire system can be clearly seen on the topology diagram.
Each switch can remark the name according to the corresponding switch place, for example: (1st floor 1st floor switch) and so on to form effective cluster management.
3. Fixed port identification IP function:
NVR and IP Camera that support ONVIF protocol can be automatically identified, and information such as equipment manufacturer, model, and location can be indicated.
And indicate the relationship between NVR and IP Camera, that is, which IP Camera is managed by which NVR.
Hover the mouse at the "C" position to see the IP address and related information of the IPC. Hover the mouse at the "N" position to see the NVR's IP address and related information
Hover the mouse on the N letter logo, you can not only see the NVR's IP address, but also make all IPCs connected to the NVR flash, no matter which switch it is connected to, as long as it is connected to the same NVR, it will flash.
4. Loop detection function:
In the network, Netis Vision switches can automatically identify the loop between the ports, and then shield and mark it. Any plug-in will cause a loop and it will not affect the network. It is marked as purple in the topology to facilitate maintenance and failure. exclude.
5. On-off alarm, private network configuration, etc., not introduced here.
With this professional video surveillance switch in this project, wiring, troubleshooting, and maintenance have become very simple and convenient.
Decoding on the wall
Next, decode the video on the wall: 438 channels of video are calculated according to the 4M megabit stream and stored for one month, which is almost 190 3TB hard drives. In order to consider the cost, we recommend a 24-disk storage matrix to our customers. The network high-definition digital matrix has the functions of monitoring multiple products in the industry, including platform software management, network high-definition decoding, network storage, and video matrix switching control, (splicing server) functions, alarm linkage, electronic map, access control, and fire protection Alarm access.
In any large-scale system, the size of the central computer room, the number of products and even energy consumption have become a systematic problem. The video surveillance system also needs to be formed in the surveillance center by a single machine with more functions and higher performance equipment, which is an important consideration. If storage products integrate some related functions other than storage into storage products on the basis of ensuring high performance, it will be an inevitable choice to adapt to the development trend of small computer rooms and large applications.