Distributed optical fiber fire warning system for integrated pipe gallery

  The urban comprehensive pipe gallery includes communication, electric power, natural gas, thermal power and other pipelines. Although it solves the pain points of many urban construction, the safety of the comprehensive pipe gallery is also greatly improved. As there is no one on duty at ordinary times, when there is a fire in communication cable and power cable, and leakage occurs in thermal pipeline and natural gas pipeline, it will cause huge negative social impact and economic loss. The distributed optical fiber temperature measurement subsystem can accurately judge the abnormal point in the early stage of the accident, early warning, accurate positioning and prevent the accident in advance by laying the temperature measurement optical fiber on the cable and pipeline to monitor the temperature change of the cable, thermal pipeline and natural gas pipeline in real time.

Advantages of the system:

1、Surface temperature measurement and over hot spot monitoring of power cable

2、Cable online load safety monitoring

3、Early warning of fire hazards and accurate positioning

Technical features:

1、Zone measurement: the measurement area can be arbitrarily divided in length, and some areas can be locally monitored and alarmed.

2、Alarm function: with constant temperature alarm, temperature rise alarm, fiber break alarm, device abnormal alarm and other alarm functions.

3、Alarm and zone setting: the setting of fire zone, constant temperature alarm, temperature rise alarm and the configuration of alarm output are all set by software, flexible and convenient.

Performance index:

Measuring distance  2/4/6/8/12/16/20/30/40KM

Working voltage  AC220V,50HZ or DC24V

Temperature measurement range  -70-300℃

Temperature measurement accuracy  ±0.5℃

Corresponding time  ≤6S/Channel

Spatial resolution 1M

Communication interface 100M Ethernet, rs2s2, RS485