Matters needing attention in the construction of wireless video surveillance system
With the development of social economy and the improvement of people's living standards, in order to have a better living environment, the monitoring system has become an important trend of development. Since many monitoring systems are added at a later stage, the implementation of ordinary cable projects is easy to destroy the original facilities, and the cable construction period is long. Therefore, most projects will adopt wireless video surveillance system as the implementation plan of new rural and safe city monitoring. The wireless video monitoring system adopts the current stable wireless monitoring equipment to design according to the project, build a high-definition system, with a short construction period and simple maintenance at a later stage. What do we need to pay attention to when designing a wireless video surveillance system?
1. Image quality
High-definition has become a trend. The choice of a million high-definition network cameras or ordinary surveillance cameras in a project depends on the specific engineering needs and costs.
2. Transmission environment
Wireless transmission equipment uses microwave signals to transmit video data and other signals, so it must be transmitted in the open and unobstructed to ensure stable and effective transmission of wireless monitoring equipment and the stability of wireless video surveillance systems. The installation location of the wireless digital microwave should also choose the line-of-sight environment as much as possible.
3. Switch selection
Wireless devices have no fixed requirements for the selection of switches. In the case of large data volumes, customers are advised to choose Gigabit switches to ensure the quality of the switch. If the switch is under load, it will also cause backend transmission packet loss and frame loss And delay, stuttering, etc. To build a wireless video surveillance system, only when the amount of data is large needs to consider the choice of the switch.
5. Make address records
After the project equipment is purchased and before construction, the IP addresses of all network cameras, wireless digital microwaves, NVRs, computer masters, management servers, etc. in this wireless video surveillance system can be uniformly modified and registered, and care must be taken to avoid There is an IP address conflict with the original device (such as a computer) in the local network;
6. Pay attention to IP address conflicts
The IP addresses of all devices connected to the wireless network must not conflict. For example, the IP addresses of all network devices such as network cameras, wireless digital microwave, NVR, and computers cannot conflict, but they must be in the same LAN.
7. Pay attention to network cable selection
It is generally recommended to use a double-shielded ultra-category five or more network cable with a shielding effect, which has a great influence on the long-term transmission of equipment.
8. Pay attention to the length of the network cable
To build a good wireless video surveillance system, every detail is important, including the selection of the connecting cable between the wireless digital transmitter and camera, the wireless digital receiver and the video recorder. In the high-definition wireless video surveillance system, we Try to choose Category 6 or Category 6 network cables to build a wireless monitoring system. The quality of the network cable depends on the distance you transmit the signal. The length of the network cable from the POE to the wireless digital microwave cannot exceed 50 meters. If it is too long, the signal attenuation will be too large. The length of the network cable from the network camera to the wireless digital microwave is generally within 100 meters, and the length of the network cable from the wireless digital microwave at the receiving end to the switch is also within 100 meters. If you need to transmit a longer distance, it is recommended to use optical fiber for transmission.
9. Selection of wireless transmission equipment
1. Working frequency
The mainstream frequency band of wireless transmission equipment has two frequencies of 2.4G and 5.8G
2.4G frequency band advantages: strong diffraction penetration ability, mainstream frequency band, good compatibility
Disadvantages: easy to be interfered by signals in the same frequency band, such as microwave oven, Bluetooth or other electrical appliances
Advantages of 5.8G frequency band: the frequency band is clean and not easily interfered, and the transmission distance is farther than 2.4G in wireless monitoring applications
Disadvantages: The diffraction penetration ability is slightly poor, and the signal is easily absorbed by obstacles
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