On line fire monitoring of highway tunnel and subway

     The tunnel is a closed long and narrow space, with large traffic volume and poor ventilation conditions. After a fire, the smoke is large and hard to emit, which is easy to pose a major hazard to the safety of vehicles, personnel and equipment in the tunnel. The optical fiber sensing system can accurately detect the temperature distribution in the whole tunnel, monitor the temperature in the tunnel in real time and for a long time, make a reasonable judgment based on the empirical value, and control the development before the fire. When there is an accident or fire, alarm shall be given quickly to prevent the later vehicles from entering the tunnel and minimize the accident loss.

  System topology

Advantages of the system:

1、Real time measurement of operating temperature in tunnel

2、Give an alarm in case of fire in the tunnel to prevent later vehicles from entering the tunnel

3、In case of fire in the tunnel, the fire alarm signal shall be transmitted to the fire alarm system in time, and the fire control and transportation departments shall be informed to come to the rescue in time

4、 Report the exact location of the fire to the fire department and traffic department to gain time for rescue work

5、The unique fire spread analysis function of optical fiber system helps the fire department and transportation department to guide the escape direction of field personnel

6、The optical fiber system can also control the direction of rotation, start and stop of the fan according to the direction of fire spread, so as to keep the toxic smoke away from the escaping personnel