TUNNEL DISASTER PREVENTION SYSTEM

PROBLEM TO BE SOLVED: To provide a tunnel disaster prevention system which enables a power supply backup even when abnormalities occur in the power supply of a relay device so as not to generate a section which is unable to perform fire monitoring.SOLUTION: The tunnel disaster prevention system 1 according to the present invention includes: a control board 11 having a control part in which a downstream side relay device 7C performs the monitoring of a state of a fire disaster detector 9; a power supply 13 for supplying a power supply to the control board 11 in a normal time; and switching means 15 for switching a connection/non-connection between the control board 11 and the power supply 13, and switching the connection/non-connection between the control board 11 and the power supply 13 of the upper stream side relay device 7B. In a normal time, the control board 11 and the power supply 13 are put into a connection state, and the control board 11 and the power supply 13 of the upper stream side relay device 7B are put into a non-connection state by the switching means 15. When an abnormality occurs in the power supply 13, the control board 11 and the power supply 13 are put into the non-connection state, and the control board 11 and the power supply 13 of the upper stream side relay device 7B are put into the connection state by the switching means 15. 【課題】中継器の電源に異常が発生しても電源バックアップを可能にして火災監視できなくなる区間が生じないようなトンネル防災システムを提供する。【解決手段】本発明に係るトンネル防災システム１は、下流側中継器７Ｃが、火災検知器９の状態監視を行う制御部を有する制御盤１１と、平常時において制御盤１１に電源を供給する電源１３と、制御盤１１と電源１３との接続／非接続、制御盤１１と上流側中継器７Ｂの電源１３との接続／非接続を切り替えるスイッチング手段１５とを備えており、平常時には、スイッチング手段１５によって制御盤１１と電源１３を接続状態にすると共に、制御盤１１と上流側中継器７Ｂの電源１３を非接続状態にし、電源１３に異常が発生したときには、スイッチング手段１５によって制御盤１１と電源１３を非接続状態にすると共に、制御盤１１と上流側中継器７Ｂの電源１３を接続状態にすることを特徴とするものである。【選択図】 図１