Scheme of Our Industrial Switch in Expressway Monitoring System

In the past two decades, with the rapid development of highway transportation in China, the grade of highways has been continuously improved, and the mileage of highways open to traffic has increased year by year. Highway construction has become a pillar industry driving the growth of national economy and a leader driving the development of local economy.

As the main traffic artery, traffic violations and accidents occur frequently, so the monitoring measures of expressway are particularly important. The harsh on-site environment and single laying method restrict the planning and design of the expressway monitoring scheme. The most important thing in the design is to facilitate the line laying of each monitoring point, and at the same time, the Industrial Switch is used to ensure the effective operation of the system.

The expressway monitoring system is mainly divided into two parts: monitoring center and outfield equipment. The outfield monitoring equipment mainly includes traffic information monitoring, meteorological environment monitoring, pavement state detection, information board, abnormal condition monitoring, etc. However, these expressway monitoring systems need to use the industrial switch, establish an industrial ring network, connect the toll gate of the expressway, the monitoring video server of each section, the emergency telephone, the safety monitoring platforms of the tunnel, etc., and use the industrial switch ring network to build the expressway monitoring system.

According to the design requirements, one monitoring point is used for line segmented monitoring. A monitoring substation is set in each section. HD cameras are used for monitoring each section of the line. Video information is gathered through the ring network switch, and then each monitoring point is gathered in the monitoring substation through the ring network redundancy. The monitoring substation converges on the gigabit Ethernet of the monitoring center through the gigabit Ethernet optical network channel, and then transmits the video data to the monitoring screen for real-time control of the traffic conditions of the expressway.

Features of Our Industrial Switch in Expressway Monitoring System:

With the development of technology, the digital video monitoring system has become the mainstream development direction of the monitoring industry. In addition to all the functions of the traditional CCTV monitoring system, the digital video monitoring system also has the functions of remote video transmission and playback, automatic anomaly detection and alarm, structured video data storage, and so on. For expressway projects, the transmission medium of video monitoring system is basically optical fiber transmission. The system adopts high-definition IP camera, and it is recommended to adopt the solution of industrial switch transmission.

1. Adopt full gigabit Ethernet ring network, ERPS ring network management, industrial switch ring network self-healing time<20 ms, to ensure the smoothness of high-definition video, stability of network architecture and real-time;

2. Support multiple on-site devices (ETC, camera, computer, etc.); The SFP slot of the industrial switch equipment used in the scheme can be used for simple and flexible optical fiber expansion;

3. All industrial switches are of industrial grade design and dual power redundancy design. They pass the EMC industrial level 4 standard and can work stably in harsh environments such as high and low temperatures (- 40~85 ° C) and strong electromagnetic interference;

4. The industrial switch has rich network management functions, and different VLAN business groups are effectively isolated without interference, ensuring stable and efficient video transmission;

5. The on-site commissioning of the whole scheme is simple, easy to maintain, convenient for later maintenance and management, and saves manpower.

The scheme of our Industrial Switch in the expressway monitoring system helps to build an intelligent expressway video monitoring project, scientifically plan the network bandwidth occupation and traffic distribution, reasonably design and access high-speed analog video, digital video, high-speed wireless video and visual command signals at checkpoints of other lines according to the architecture of the team and multi-level monitoring management centers in various regions. On the existing platform, the label of the access video point is completed, and the management functions of information query, video on demand, image control, image switching, voice intercom, illegal capture, video recording and playback of the monitoring signal source are realized. At the same time, the monitoring platform provides video decoding function, which can restore digital images to analog signals for display on the large screen.