Title:
FIRE ALARMING DEVICE
Document Type and Number:
Japanese Patent JP2585906
Kind Code:
B2
Abstract:
PURPOSE: To judge a fire without being affected by the installation position of an analog fire sensor by finding the correlation between the setting position of the analog fire sensor and its sensor output by experiment, and correcting the threshold value for fire judgement into a threshold value used for the same data with the installation right above a fire point on the basis of the correlation.
CONSTITUTION: A threshold correcting circuit 12 corrects the threshold value on the basis of the distance from the position of the fire point detected by a fire point detecting device 6 which is calculated by a fire point judging circuit 7. The fire point detecting device 6 detects the fire point by installing analog sensors 1a-1n and regarding an alarm area as a monitor area. The fire point judging circuit 7 stores the sensor installation positions in the alarm area and calculates the distance from right above the fire point to an analog sensor according to the installation position of the analog sensor corresponding to the detected fire point position. The correction by the threshold value correcting circuit 12 based upon the distance is made according to the correlation of variation of the detection output when the experimentally found distance from right above the fire point is varied.
Inventors:
YAMAUCHI YUKIO
KITAJIMA AKIRA
OOTANI SHIGERU
MUROI TOKUO
ISHII HIROMITSU
ONO TAKASHI
KITAJIMA AKIRA
OOTANI SHIGERU
MUROI TOKUO
ISHII HIROMITSU
ONO TAKASHI
Application Number:
JP27819391A
Publication Date:
February 26, 1997
Filing Date:
October 25, 1991
Export Citation:
Assignee:
HOOCHIKI KK
ISHII HIROMITSU
ISHII HIROMITSU
International Classes:
A62B99/00; G08B17/00; G08B17/06; G08B25/00; (IPC1-7): G08B17/00; A62B37/00; G08B17/06; G08B25/00
Attorney, Agent or Firm:
Takeuchi Susumu