Wuxi Dehang Technology tells you that ordinary Security monitoring What are the precautions for system upgrade and HD monitoring installation
In the wave of security monitoring, the upgrading of video monitoring is like tidal replacement. Security monitoring is moving from the era of imitation to the era of digital high-definition. What should we pay attention to in the construction of high-definition monitoring system?
1、 Switch Select. If there are more than 5 points (including 5 points above 720P), please use the full gigabit network switch;
2. Do a good job of backup. Before construction, all network ball machines and networks in the system should be video camera NVR, main computer, storage The server IP addresses of streaming media servers, high-definition decoders, management servers, etc. should be uniformly modified and registered. Attention should be paid to avoiding IP address conflicts with existing devices (such as computers, network printers) in the local network;
3. Do a good job of registration. Please do not set all the devices in the network system (including the original devices) to the mode of automatically obtaining IP addresses. All the IP addresses are manually set and registered in the registration form;
4. Pay attention to IP conflicts, such as wireless in the network system Router Please pay attention to access wireless network Whether the IP addresses of mobile phones and tablets in the system conflict;
5. Attention shall be paid to the selection of convergence layer switches. The number of front-end switches connected to IPC in a single unit shall not exceed 4, and 8-port 100 megabyte switches can be used. If more than 4, 8-port full gigabit switches shall be used, because only one network cable is used for transmission between the front-end switch and the main switch in the machine room. If the number of loaded IPC is too large, packet loss, frame loss, delay/time, and jamming are likely to occur;
6. Pay attention to the selection of network cables. The national standard super five network cables can be used between the IPC and the front-end switch, while the national standard six network cables and six crystal heads can be used between the front-end switch and the main switch in the machine room;
7. Attention shall be paid to the distance between the camera and the main control room. The network switch can only be used to relay between the high-definition network ball machine, high-definition IPC and the main switch in the machine room once; If the distance is more than 100 meters, optical fiber can be used. For receiving and transmitting, please use one light and one electricity or one light and two electricity or one light and four electricity Haoyiling optical fiber transceiver
8. Pay attention to the selection of wire materials. If the national/international super class 5 shielded network cable is used from the network ball machine, network camera to the front-end switch, the wire length should not exceed 80 meters, and if the national/international class 6 network cable is used, the wire length should not exceed 100 meters;
9. Generally, the main switch in the computer room should not be a managed switch, unless there are engineers who are familiar with setting managed switches, or the system is relatively large;
10. The main switch in the computer room should choose a brand full gigabit switch and not work with full load. For example, when 24 port full gigabit switches are actually used, they should not use more than 20 ports. Because the amount of network HD monitoring data is large and it is constantly transmitting data, the processing requirements for the switch are high. If there is a switch with many points, there will be delay/time The problem of stuck can be solved by adding a switch.
11. The project scope of network monitoring can determine the type and number of high-definition webcams for different coverage. The types are 1MP (1/4Sensor)/1.3MP (1/3Sensor)/2MP (1/2.7Sensor)/3MP (1/2.5Sensor). In a project, the lens selection is very important, which depends on whether the customer can fully cover the viewing range.
12. Network monitoring project object, which determines the view range, camera position and required camera type. The monitoring object can be divided into fine view and general view. Fine images are effective for identifying people or specific targets, such as: people's faces, certificates, sales store monitoring; The general observation diagram is mainly used to monitor the whole scene or the general flow of the scene. The monitoring target determines the viewing range, camera position and required camera type.
13. Network monitoring project environment, because the indoor and outdoor light is different, the sensitivity and lighting effect should be considered. Infrared light can be used in outdoor environment, and some also need to use day and night dual-use surveillance cameras; If it is indoor, it is generally unnecessary to consider so much, as long as the lighting effect is considered. In addition, if you are outdoors, you should also consider the factors related to dust, moisture, water and damage prevention. For example, in the dark environment, cameras with low illumination function can be used, in the environment with uneven light distribution, cameras with wide dynamic function can be used, in the bayonet environment, cameras with professional license plate function can be used, and in the elevator environment, elevator dedicated/dedicated cameras can be used, etc.
14. Whether it can be monitored openly, because some places need to install hidden millions of high-definition webcams for specific reasons. Therefore, in this respect, it is necessary to consider selecting non concealed or concealed surveillance cameras.
15. Intelligent video and event management. Video is recorded through the input port and intelligent video function of network video products based on event triggers, saving bandwidth and storage space. Unless an alarm/event occurs, it is not necessary to monitor all surveillance cameras on site, so operators can monitor more cameras. The event management function is often configured by the event management software program, which is supported by the input/output port of the million high-definition network camera or video encoder and the intelligent video function.
16. The audio function of the network monitoring project is also determined by the location you use. If you need to use a million high-definition network camera with audio function, you should also consider connecting headphones, speakers, pickups and other devices.
17. The image quality of millions of high-definition network cameras is as important as that of ordinary surveillance cameras. In this regard, we can only use different million high-definition webcams to observe the effect, and choose a more suitable million high-definition webcam. It is recommended to bring enough prototypes to the customer for testing before installation, so as to carry out batch installation with the effect of final customer selection.
18. When doing remote monitoring, pay attention to the number of routers. If you use an IPC with multi-layer router penetrable function, you can not consider this matter. If you can only penetrate one layer of router, you should consider this matter when doing remote monitoring.
