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Advanced control and monitoring system for highway tunnel

業種 交通
関連製品 EDS-405A/408A シリーズ
IMC-101 シリーズ
概要 A reliable, high-speed network was needed to set up a state-of-the-art monitoring and control system for Baifeng Tunnel in Hangchow, China.
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プロジェクト紹介


Requirements

OK! Rapid development in China's domestic economy has led to dramatic growth in the number of highway and tunnel construction projects. To ensure the safety of tunnel users, tunnel monitoring and control systems must be designed with reliability and robustness in mind. Baifeng Tunnel in Hangchow, China is close to two kilometers in length and was to feature state-of-the-art monitoring and control systems. The communication network needed to provide high-bandwidth communication over long distances while withstanding heavy-duty usage and conditions.


Solution
10/100 Mbps Ethernet was selected as the main communication medium, and Moxa's Turbo Ring topology was used for enhanced reliability. Control signals were transmitted using Profibus (max. speed of 12 Mbps), while monitors, highway MIS, GIS, GPS, and monitoring stations were managed over Ethernet connections.


Since Baifeng Tunnel spanned nearly 2 km, the fiber optic ports on the Moxa's ED6008-MM-SC industrial Ethernet switches were used to build a ring topology that connected to PLCs along the tunnel. In order to connect the network to the main control room, IMC-101-M-SC Ethernet to fiber media converters were used to extend Ethernet transmission distance. With the ED6008-MM-SC, maintenance personnel could receive automatic warning e-mails for network exceptions, so they would have real-time notification of possible emergency situations.


Thanks to the redundant fiber ring configuration, the monitoring and control system was extremely reliable and able to handle the high bandwidth of video surveillance systems and control systems for ventilation, lighting, traffic control signals, and emergency telephones. With the new system in place, tunnel controllers could be instantly alerted of an accident, fire, or other emergency. The instant access to accurate data made it possible for personnel to make the best decisions under both normal and emergency conditions.


 

Benefits



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