Title:
トンネル防災システム
Document Type and Number:
Japanese Patent JP6770867
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a tunnel disaster prevention system capable of simplifying a facility configuration and processing by integrating a function of a current monitoring device with a disaster prevention reception board, and also performing warning by catching a sign before a current value abnormality of a signal line is determined.SOLUTION: A disaster prevention reception board 10 performs monitoring with the use of terminal units connected to signal lines 12-1 to 12n and including manual notification devices and detectors. A monitoring control section 56 of the disaster prevention reception board 10 receives a fire signal so as to output fire alarm and detects a failure of a signal line so as to output failure alarm. A current monitoring section 58 measures a value of a current flowing in the signal lines for each predetermined period so as to store the value and determines a current value abnormality so as to perform warning when the value is deviated from a predetermined threshold range. The current monitoring section also determines a sign of a current value abnormality so as to issue sign alarm when a measured current value is greatly changed within a threshold range for determining a current value abnormality, and measures a current value by shortening a measurement period concerning a signal line where the sign of a current value abnormality is determined.SELECTED DRAWING: Figure 4
Inventors:
Nakao Shigeyoshi
Sugiyama Yashou
Kenta Suzuki
Sugiyama Yashou
Kenta Suzuki
Application Number:
JP2016203419A
Publication Date:
October 21, 2020
Filing Date:
October 17, 2016
Export Citation:
Assignee:
Hochiki Corporation
International Classes:
G08B29/06; A62C3/00
Domestic Patent References:
| JP7209368A | ||||
| JP63144265A | ||||
| JP2002024959A | ||||
| JP2002024954A | ||||
| JP2001265452A | ||||
| JP2013105370A |
Attorney, Agent or Firm:
Susumu Takeuchi