JPS6448198A - Fire alarm device - Google Patents

Fire alarm device

Info

Publication number
JPS6448198A
JPS6448198A JP20418587A JP20418587A JPS6448198A JP S6448198 A JPS6448198 A JP S6448198A JP 20418587 A JP20418587 A JP 20418587A JP 20418587 A JP20418587 A JP 20418587A JP S6448198 A JPS6448198 A JP S6448198A
Authority
JP
Japan
Prior art keywords
time
sensor output
output level
value
function
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP20418587A
Other languages
Japanese (ja)
Other versions
JPH07122916B2 (en
Inventor
Yoshiaki Okayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nohmi Bosai Ltd
Original Assignee
Nohmi Bosai Kogyo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nohmi Bosai Kogyo Co Ltd filed Critical Nohmi Bosai Kogyo Co Ltd
Priority to JP20418587A priority Critical patent/JPH07122916B2/en
Publication of JPS6448198A publication Critical patent/JPS6448198A/en
Publication of JPH07122916B2 publication Critical patent/JPH07122916B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Fire Alarms (AREA)

Abstract

PURPOSE:To surely give an alarm in an early stage, by outputting a signal indicating abnormality when the value obtained by integrating a part higher than a reference function, which gradually rises as the function of time, of the sensor output level with respect to time reaches a prescribed integral value. CONSTITUTION:A sensor output level SLV is sampled at intervals of a prescribed time DELTAt by a sampling means, and a difference SLV-R between the sampled sensor output level higher than a reference function R, which gradually rises as the function of time (t), and the reference function R is integrated at intervals of the time DELTAt by an integrating means. A discriminating means compares the value integrated by the integrating means with a prescribed integral value, and the signal indicating abnormality is outputted when the value integrated by the integrating means reaches the prescribed integral value. Consequently, a fire is stably detected which state the sensor output level rises in at the time of the occurrence of the fire.
JP20418587A 1987-08-19 1987-08-19 Fire alarm Expired - Lifetime JPH07122916B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20418587A JPH07122916B2 (en) 1987-08-19 1987-08-19 Fire alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20418587A JPH07122916B2 (en) 1987-08-19 1987-08-19 Fire alarm

Publications (2)

Publication Number Publication Date
JPS6448198A true JPS6448198A (en) 1989-02-22
JPH07122916B2 JPH07122916B2 (en) 1995-12-25

Family

ID=16486241

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20418587A Expired - Lifetime JPH07122916B2 (en) 1987-08-19 1987-08-19 Fire alarm

Country Status (1)

Country Link
JP (1) JPH07122916B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1063965A (en) * 1996-08-27 1998-03-06 Nohmi Bosai Ltd Fire alarm equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1063965A (en) * 1996-08-27 1998-03-06 Nohmi Bosai Ltd Fire alarm equipment

Also Published As

Publication number Publication date
JPH07122916B2 (en) 1995-12-25

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