Wireless video surveillance highlights important role in traffic safety

With the increasing consumption of vehicles in China, the city’s traffic flow is gradually increasing. The real-time monitoring of urban traffic is becoming more and more important. Especially at the crossroads where JIAO is blocked, equipped with corresponding image monitoring equipment and wireless video surveillance, the traffic conditions at traffic intersections can be transmitted to the dispatch center in real time. Vehicle operating conditions are monitored. At the same time, the traffic management department can control the flow of road vehicles according to the actual situation on the site, arrange the vehicles to unimpeded road sections, reduce congestion, ensure the smooth flow of road traffic, and realize intelligent urban traffic management.

City intersection wireless video surveillance program features

Since the monitoring points of traffic intersections and traffic control centers are generally far apart from each other, and their distribution locations are relatively dispersed, the use of traditional network cabling methods is not only very costly, has a long construction period, but also has poor scalability and flexibility, and it needs to increase or decrease as needed. The monitored points will bring new construction cycles.

The wireless network can connect multiple monitored points to the traffic control center, and can be set up quickly. It can quickly establish wireless network links in the shortest time. Using a wireless bridge can support up to 50 km of bridging.

In order to ensure the stable transmission of video compression files, there must be sufficient network bandwidth. Different video compression files have different requirements for network bandwidth. In order to achieve better video quality, network bandwidth is even more important. The network bandwidth defined by the wireless network standard protocol IEEE802.11a is 54 Mbps, the effective data transmission bandwidth is 22 Mbps, and the wireless link can reach a high network bandwidth of 54 Mbps. It can fully guarantee the stable and reliable transmission of digital video streams using the MPEG-4 format. To achieve the purpose of wireless video surveillance.

Wireless video surveillance system has the following advantages and characteristics:

1. Easy installation and construction: The use of wireless network can avoid or reduce the workload of network cabling without destroying the original environment facilities. It has the characteristics of short construction period and high cost performance.

2. Fast coverage can be achieved: The biggest advantage of the wireless network system is its ability to achieve rapid coverage. With the point-to-multipoint wireless communication method, generally only one or more wireless central station devices need to be installed, and a broadband wireless access network system covering the entire urban area can be established.

3. High flexibility: Urban traffic intersections have the characteristics of wide distribution and geographical dispersion. With the lack of flexibility in the use of wired networks, the need for future development must be considered as much as possible, which necessitates the presupposition of a large number of information points with low utilization. After the wireless network is established, the wireless terminal station can be set up at any position within the coverage area of ​​the wireless signal, and the network access can be realized with high flexibility.

4. Strong scalability: When there is a need to increase service points, there is no need for a large-scale network transformation. As long as the wireless devices at monitored points are increased or decreased, the increase or decrease of monitored points can be completed.

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