Title:
トンネル防災システム
Document Type and Number:
Japanese Patent JP6885994
Kind Code:
B2
Abstract:
To make it possible to adequately determine a situation of insulation deterioration by continuing measurement and recording of line current without being disturbed by warning of current value abnormality even when the warning of current value abnormality is obtained via periodical measurement of current of a signal line to which a terminal apparatus is connected.SOLUTION: A tunnel disaster prevention system performs monitoring by connecting a terminal apparatus including a notification device and detector 16, 18 to a signal line drawn out from a disaster prevention reception board 10 into a tunnel. The disaster prevention reception board 10 includes line current monitoring means 72 for measuring and recording, in each predetermined period, a value of current flowing through the signal line to which the terminal apparatus is connected, determining current value abnormality and originating warning before notifying an external remote supervisory control facility 27 of the current value abnormality to make the facility originate warning when the measured value of current is equal to or larger than a predetermined threshold or exceeds the threshold, and canceling the current value abnormality before resuming current value measurement in each predetermined period when recovery operation by the disaster prevention reception board 10 or the remote supervisory control facility 27 is detected.SELECTED DRAWING: Figure 2
More Like This:
Inventors:
Sugiyama Yashou
Application Number:
JP2019152418A
Publication Date:
June 16, 2021
Filing Date:
August 23, 2019
Export Citation:
Assignee:
Hochiki Corporation
International Classes:
H04B3/46; G08B17/00; G08B29/06
Domestic Patent References:
| JP10248951A | ||||
| JP2014157440A | ||||
| JP11283168A | ||||
| JP2012242330A | ||||
| JP2012145418A | ||||
| JP62021347A | ||||
| JP2002042263A | ||||
| JP5153243A | ||||
| JP6266990A | ||||
| JP2004312354A | ||||
| JP5043300U |
Attorney, Agent or Firm:
Susumu Takeuchi