The highway tunnel monitoring system includes lighting systems, ventilation systems, fire alarm systems, fire control systems, emergency telephone systems, broadcasting systems, etc. Due to the relatively complex environment in the highway tunnel, the use of industrial Ethernet switches to form an optical fiber ring network has the functions of rapid redundancy, wide temperature, high protection level, and strong electromagnetic interference.
The Tianchi Tunnel total length is 2900 meters, and the Zhuanbao Tunnel total length is 1255 meters. Due to the age of the tunnel construction, the tunnel monitoring system was upgraded for traffic safety.
Tunnel monitoring system requirement
▲ Industrial design with high reliability.
▲ Support multi-service access capability.
▲ Meet the automotive application environment.
▲ Support network management integrated control.
▲ A unified network of video and environmental monitoring.
▲ The network has a redundant and fast self-healing function.
▲ Uninterrupted network communication between the tunnel and the control center.
Solution Design
Due to the particularity of the tunnel section and structure, adopts the ONV network redundancy protocol V-Ring, it can support G.8032 (ERPS), up to 255 rings, and each ring 254 devices. Adopting the ring network design can ensure that the network runs uninterruptedly to meet the operational requirements of tunnel monitoring and other systems. Each subsystem uses the Gigabit fiber optic ring network transmission to ensure the stable transmission of video data. The monitoring center uses a 10G managed Ethernet switch that can support the V-Ring protocol.
The model ONV-IPS36368FM industrial switch has 8*10/100/1000M RJ45 ports to meet the needs of a large number of video transmission, 24*100/1000M SFP fiber ports, and 4* 1/10G SFP + fiber ports with SFP modules can provide long-distance fiber transmission. ONV brand industrial switch series products have passed EMI and EMS tests, and the MTBF is up to 539608 hours. Industrial switches support -40 ~ + 85 ° C operating temperature.
System Topology
Topology Architecture
A star topology and ring network topology networking, simple topology enhances system stability.
Switching Capacity Configuration
The access layer used full gigabit managed industrial fiber switches to set up the higher configuration switching capacity link.
Link Medium
The access layer link uses the Cat6 network cable to connect and transmit according to the principle of proximity. It is connected to the aggregation switch through the uplink port of the power supply switch, reducing the number of multi-level series and facilitating the management and maintenance of the entire system.
Device Configuration
The access layer used the 6-port gigabit managed industrial Ethernet switch and the core layer used the 36-port 10G uplink managed industrial switch.
