Railway tunnel monitoring system
The railway tunnel monitoring system is also known as the railway tunnel disaster recovery system. It mainly completes the centralized monitoring, fault alarm and dispatch management of the power facilities, illumination/emergency lighting equipment, wind turbines, water supply and drainage facilities, fire doors, etc. in the tunnel. When a disaster occurs, it can Linked with FAS or other automation systems, it is automatically controlled according to the output of the pre-generated disaster plan to achieve the purpose of disaster prevention and reduction and ensure the safe operation of the train.
The monitoring system must complete the functions of monitoring, processing and inducing traffic flow. Including the collection, processing and display of vehicle detector data, accident records and small variable information signs, large variable information signs and traffic signal display content changes, transmission and display, traffic flow statistics and various report processing and printing.
The tunnel monitoring system can be divided into various subsystems: lighting system, ventilation system, traffic control system, CCTV system, fire alarm system, fire control system, emergency telephone system, power monitoring, etc.
The system adopts industrial Ethernet networking, a typical four-level control system, namely the field apparatus layer (Field apparatus Layer), the field control layer, the central control layer, and the upper management layer
> Field equipment layer: mainly includes actuator traffic lights, fans, lighting and CO, visibility sensors, etc.
> On-site control layer: It is composed of programmable controllers, called area controllers, and the redundant optical fiber ring network communication between the area controllers
> Central control layer: consists of dual hot standby server, communication computer and two monitoring computers
> Upper-level management: composed of data servers and terminal computers in the monitoring center, which can be published on the web
> SW-Ring optical fiber ring network topology, while realizing network redundancy, reducing wiring construction
> Each IES615 series switch in the tunnel supports 2 RS-485 serial device access
> Products are designed in strict accordance with the industrial level 4 standards, and calmly deal with the long and changeable complex environment along the railway
> RS-485 interface adopts advanced photoelectric isolation technology to effectively prevent abnormal bus interference
> Rich network management methods, use VLAN to effectively isolate different business groups
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