JPS6435695A - Fire detector - Google Patents

Fire detector

Info

Publication number
JPS6435695A
JPS6435695A JP19037287A JP19037287A JPS6435695A JP S6435695 A JPS6435695 A JP S6435695A JP 19037287 A JP19037287 A JP 19037287A JP 19037287 A JP19037287 A JP 19037287A JP S6435695 A JPS6435695 A JP S6435695A
Authority
JP
Japan
Prior art keywords
fire
ratio
flame
detection
energies
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.)
Pending
Application number
JP19037287A
Other languages
Japanese (ja)
Inventor
Katsuyuki Miyauchi
Masahiro Tsuzura
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.)
Chino Corp
Original Assignee
Chino Corp
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 Chino Corp filed Critical Chino Corp
Priority to JP19037287A priority Critical patent/JPS6435695A/en
Publication of JPS6435695A publication Critical patent/JPS6435695A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fire-Detection Mechanisms (AREA)

Abstract

PURPOSE:To obtain a fire detector capable of recognizing distinctly a fire in a monitoring area by deciding the detection of the fire by calculating the ratio of the respective emission energies obtained through two filters with different characteristics. CONSTITUTION:A sector 2 is provided with a lambda1 filter 21A, which is hard to be influenced by CO2 in the air near a room temperature and transmits only the measured wavelength of the emission band of CO2 in a flame, and a lambda2 filter 22A which transmits only a reference wavelength band, not influenced by CO2, etc., in the fire. As revolving a motor 6, the respective emission energies of the measured wavelength 4.5mum and the reference wavelength 3.8mum are fetched into a detecting element 3 alternately from the filters 21A and 22A, and amplified by a pre-amplifier 4, and inputted to an operation part 5. The operation part 5 calculates the ratio of both the energies by a deciding means 51 based on a chopper synchronizing signal, obtained in a position detector 7, and decides the detection of the fire. Because the ratio at the time when the flame is detected is different from the ratio at the time when the flame is not detected as shown in a figure, the distinct detection of the fire in the monitoring area can be realized.
JP19037287A 1987-07-31 1987-07-31 Fire detector Pending JPS6435695A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19037287A JPS6435695A (en) 1987-07-31 1987-07-31 Fire detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19037287A JPS6435695A (en) 1987-07-31 1987-07-31 Fire detector

Publications (1)

Publication Number Publication Date
JPS6435695A true JPS6435695A (en) 1989-02-06

Family

ID=16257081

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19037287A Pending JPS6435695A (en) 1987-07-31 1987-07-31 Fire detector

Country Status (1)

Country Link
JP (1) JPS6435695A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009075132A (en) * 1999-12-28 2009-04-09 Hochiki Corp Flame detector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4890030A (en) * 1972-03-01 1973-11-24
JPS5769492A (en) * 1980-10-18 1982-04-28 Horiba Ltd Flame sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4890030A (en) * 1972-03-01 1973-11-24
JPS5769492A (en) * 1980-10-18 1982-04-28 Horiba Ltd Flame sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009075132A (en) * 1999-12-28 2009-04-09 Hochiki Corp Flame detector
JP2009110545A (en) * 1999-12-28 2009-05-21 Hochiki Corp Flame detector

Similar Documents

Publication Publication Date Title
CA1120132A (en) Flame sensing system
CA1302541C (en) Integrating passive infrared intrusion detector and method
FI882886A0 (en) FOERBAETTRAD GASANALYSATOR MED FLERE KANALER SAMT FOERFARANDE FOER ANVAENDNING AV DENSAMMA.
NO162436C (en) MEASURING HEAD FOR AN INFRARED ABSORPTION GAS DETECTOR.
JPS5934252B2 (en) flame detector
CN104458635A (en) Aircraft fire alarm detection device and method based on CO2 gas concentration monitoring
JPS6435695A (en) Fire detector
GB2237132A (en) Fire alarm
GB1508245A (en) Moisture indicating apparatus
US4570073A (en) Method for operating an ionization detector and an apparatus utilizing the same
JP2619389B2 (en) Fire detector
JPS56928A (en) Heater-cooker
CN218917195U (en) Carbon dioxide concentration sensor detecting system
JPS5362585A (en) Gas sensor
JPH0219716Y2 (en)
JPS6479532A (en) Airflow direction control system for air-conditioning equipment
JPS57120674A (en) Detection of etching
GB1394754A (en) Fire detection method and device for use with compressors
JPS56157823A (en) Light-measuring apparatus
JPS54162235A (en) Abnormal condition monitoring device for tube bulb sealing burner
JPS6490880A (en) Steering angle detector
JPS6445121A (en) Mark position detector
JPS55142238A (en) Abnormality detector
JPS5726300A (en) Detector of dust stuck to turbo unit
JPS5764128A (en) Loose parts monitor