Title:
FIRE DETECTION DEVICE, DISASTER PREVENTION FACILITY, AND FIRE DETECTION METHOD
Document Type and Number:
Japanese Patent JP2022097329
Kind Code:
A
Abstract:
To provide a fire detection device capable of quickly and appropriately detecting a fire in accordance with the identified kind of smoke, a disaster prevention facility, and a fire detection method.SOLUTION: In a disaster prevention facility, a signal detection unit 16 of a sensor 12 detects a first signal and a second signal by a first optical setting of a first wavelength and a first diffusion angle and a second optical setting of a second wavelength and a second diffusion angle, as a signal associated with an optical action such as diffusion due to a detection object such as smoke or steam in a monitored area. An identification unit 18 identifies a type of the detection object such as white smoke, black smoke, and steam, or a factor of occurrence on the basis of a ratio of the first and second signals or the like. A fire detection unit 20 detects a fire in a case where predetermined fire detection conditions are satisfied on the basis of at least one of the first and second signals. In addition, the fire detection conditions are changed in accordance with an identification result, such as white smoke, black smoke, and steam, made by the identification unit 18.SELECTED DRAWING: Figure 1
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Inventors:
MATSUKUMA HIDENARI
Application Number:
JP2020210893A
Publication Date:
June 30, 2022
Filing Date:
December 20, 2020
Export Citation:
Assignee:
HOCHIKI CO
International Classes:
G08B17/107; G01N21/53; G08B17/00
Attorney, Agent or Firm:
Takeuchi Susumu
Previous Patent: JPWO2022097328
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