15 October 2013 Cable tunnel fire experiment study based on linear optical fiber fire detectors
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Proceedings Volume 8924, Fourth Asia Pacific Optical Sensors Conference; 892428 (2013) https://doi.org/10.1117/12.2030874
Event: Asia Pacific Optical Sensors Conference 2013, 2013, Wuhan, China
Abstract
Aiming at exiting linear temperature fire detection technology including temperature sensing cable, fiber Raman scattering, fiber Bragg grating, this paper establish an experimental platform in cable tunnel, set two different experimental scenes of the fire and record temperature variation and fire detector response time in the processing of fire simulation. Since a small amount of thermal radiation and no flame for the beginning of the small-scale fire, only directly contacting heat detectors can make alarm response and the rest of other non- contact detectors are unable to respond. In large-scale fire, the alarm response time of the fiber Raman temperature sensing fire detector and fiber Bragg grating temperature sensing fire detector is about 30 seconds, and depending on the thermocouples’ record the temperature over the fire is less than 35℃ in first 60 seconds of large-scale fire, while the temperature rising is more than 5℃/min within the range of ± 3m. According to the technical characteristics of the three detectors, the engineering suitability of the typical linear heat detectors in cable tunnels early fire detection is analyzed, which provide technical support for the preparation of norms.
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Dian Fan, Dian Fan, Hongjun Ding, Hongjun Ding, } "Cable tunnel fire experiment study based on linear optical fiber fire detectors", Proc. SPIE 8924, Fourth Asia Pacific Optical Sensors Conference, 892428 (15 October 2013); doi: 10.1117/12.2030874; https://doi.org/10.1117/12.2030874
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