Title:
FIRE SENSOR AND FIRE DETECTION METHOD
Document Type and Number:
Japanese Patent JP3708727
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To detect fire in an early stage and to prevent non-fire report by correcting the detection characteristic of smoke through the use of a present temperature and a temperature rise rate.
SOLUTION: A temperature difference calculation part 72 detects a temperature difference ΔT showing the degree of a temperature rise at the time of receiving heat by fire. A correction coefficient deciding part 74 decides the correction coefficient K of a smoke signal S based on an outer temperature To and the temperature difference ΔT. A smoke data correction part 78 finally multiplies smoke data S detected by the smoke detection part by the correction coefficient K and corrects data.
Inventors:
Naoki Kosugi
Masayuki Ito
Masayuki Ito
Application Number:
JP31014898A
Publication Date:
October 19, 2005
Filing Date:
October 30, 1998
Export Citation:
Assignee:
Hochiki Corporation
International Classes:
G08B17/107; G01J1/42; G01K7/25; G01N21/53; G08B17/00; G08B29/24; (IPC1-7): G08B17/00; G08B17/107
Domestic Patent References:
| JP6288917A | ||||
| JP9147258A | ||||
| JP62092097A | ||||
| JP7220184A |
Attorney, Agent or Firm:
Susumu Takeuchi
Saichiro Miyauchi
Saichiro Miyauchi
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