Title:
FIRE DETECTION SYSTEM AND FIRE DETECTION METHOD
Document Type and Number:
Japanese Patent JP2015114930
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To make it possible to ensure detection of a fire from a certain scale of a fire on the basis of a fire observation image, irrespective of a distance to the fire.SOLUTION: A fire image determination unit 24 determines a fire image in which a fire is present from images picked up by a monitoring camera 10, and an angle-of-view detection unit 26 detects an angle of view of the fire from the fire image. Furthermore, a frequency detection unit 28 detects a fluctuation frequency of the fire, and an equivalent-diameter calculation unit 30 calculates an equivalent diameter of the fire based on the detected fluctuation frequency of the fire by means of a predetermined experimental formula. A length calculation unit 32 calculates a fire length from the monitoring camera 10 to the fire on the basis of the angle of view of the fire and the equivalent diameter of the fire. A fire determination unit 34 determines that the fire is a fire, and outputs a fire detection signal as well as information about the fire length and/or the equivalent diameter if the equivalent diameter of the fire is equal to or larger than a predetermined threshold.
More Like This:
| WO/1997/035433 | A FIRE IMAGING SYSTEM AND METHOD |
| WO/2005/111556 | FLAME DETECTOR WITH UV SENSOR |
Inventors:
NAGASHIMA TETSUYA
Application Number:
JP2013257612A
Publication Date:
June 22, 2015
Filing Date:
December 13, 2013
Export Citation:
Assignee:
HOCHIKI CO
International Classes:
G08B17/12
Domestic Patent References:
| JPH04330597A | 1992-11-18 | |||
| JPH08263768A | 1996-10-11 | |||
| JP2006107359A | 2006-04-20 | |||
| JPH08219775A | 1996-08-30 | |||
| JPH08138169A | 1996-05-31 | |||
| JP2010249769A | 2010-11-04 |
Foreign References:
| EP2423896A1 | 2012-02-29 | |||
| US6184792B1 | 2001-02-06 |
Attorney, Agent or Firm:
Susumu Takeuchi
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