| 摘要 |
PROBLEM TO BE SOLVED: To provide a tunnel disaster prevention system not failed in an alarm announcement, even when a fire source is shielded by a large vehicle or the like in an alarm section of a fire detector. SOLUTION: A fire prevention panel determines the presence of fire in a section between both the fire detectors, when receiving fire detection signals from both fire detectors adjacent each other, at the time of a fire disaster, in a tunnel fire prevention facility of monitoring doubly the section between the fire detectors by the plurality of fire detectors connected to the fire prevention panel by a sinal line and arranged with a prescribed interval in a tunnel, and sensitivities of the fire detectors for monitoring the sections neighboring to the section are enhanced, when receiving the fire detection signal from only one out of the fire detectors adjacent each other. COPYRIGHT: (C)2011,JPO&INPIT
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