Title:
FIRE HEAT SENSOR
Document Type and Number:
Japanese Patent JP3732770
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To differentially sense the heat independent on the directionality of an air flow.
SOLUTION: An additional value or a mean value is found from respective temperature differences ΔT1 and ΔT2 between respective outputs of two high- temperature detecting parts 18-1 and 18-2 and an output of a low-temperature detecting part 16 so as to sense a differential heat. That is to say, the temperature difference additional value (ΔT1+ΔT2) independent on the direction of the air flow or the temperature difference mean value (ΔT1+ΔT2)/2 is found and, when the value exceeds a prescribed threshold, it is determined to be a fire.
More Like This:
Inventors:
Mayu Mayukari
Yukio Yamauchi
Hiroshi Shima
Yukio Yamauchi
Hiroshi Shima
Application Number:
JP2001288822A
Publication Date:
January 11, 2006
Filing Date:
September 21, 2001
Export Citation:
Assignee:
Hochiki Corporation
International Classes:
G01K3/10; G08B17/06; G01K7/01; (IPC1-7): G08B17/06; G01K3/10; G01K7/01
Domestic Patent References:
| JP10332496A | ||||
| JP3195931A | ||||
| JP11337413A | ||||
| JP59047467B1 | ||||
| JP2153712A | ||||
| JP11287713A | ||||
| JP6129914A | ||||
| JP8106587A |
Attorney, Agent or Firm:
Susumu Takeuchi
Previous Patent: SEMICONDUCTOR PROCESSING APPARATUS
Next Patent: SYSTEM AND METHOD FOR ROUTING OPTICAL PACKET
Next Patent: SYSTEM AND METHOD FOR ROUTING OPTICAL PACKET