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GB1467213A - Flame detectors - Google Patents

Flame detectors

Info

Publication number
GB1467213A
GB1467213A GB1829075A GB1829075A GB1467213A GB 1467213 A GB1467213 A GB 1467213A GB 1829075 A GB1829075 A GB 1829075A GB 1829075 A GB1829075 A GB 1829075A GB 1467213 A GB1467213 A GB 1467213A
Authority
GB
United Kingdom
Prior art keywords
flame
detector
photo
filter
filters
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.)
Expired
Application number
GB1829075A
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.)
Cerberus AG
Original Assignee
Cerberus AG
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 Cerberus AG filed Critical Cerberus AG
Publication of GB1467213A publication Critical patent/GB1467213A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/12—Generating the spectrum; Monochromators
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Control Of Combustion (AREA)

Abstract

1467213 Flame detectors CERBERUS AG 1 May 1975 [10 May 1974] 18290/75 Heading G1A In a flame detector, radiation from the flame is transmitted to a photo-electric element via a device which causes the spectral content of the radiation falling on the element to vary periodically. The device may comprise a red filter and a blue filter rotated in the radiation path by a disc, or may be a pair of stationary filters combined with Kerr cell light valves, or may be a single filter whose spectral transmission is electrically controlled such as a liquid crystal or a piezo-controlled interference filter. The flame detector only indicates the presence of a flame when the periodic component of the photo-electric element output exceeds a threshold value. In Fig. 1 the filters are carried by disc D, and the signal from the photo-detector P is demodulated at A against a timing signal from motor M, to give the ratio of the red and blue content of the flame. Provided the ratio is above a given value, a signal is generated at S to indicate the presence of the flame. An electrical filter may be included to restrict response to 8-25 Hz, the flicker frequency of the flame. It is also possible to place a second photo-detector so that it detects flame flicker, the periodic variation of spectral content caused by the filters only being permitted when the second detector indicates flicker.
GB1829075A 1974-05-10 1975-05-01 Flame detectors Expired GB1467213A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH636774A CH565421A5 (en) 1974-05-10 1974-05-10

Publications (1)

Publication Number Publication Date
GB1467213A true GB1467213A (en) 1977-03-16

Family

ID=4308467

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1829075A Expired GB1467213A (en) 1974-05-10 1975-05-01 Flame detectors

Country Status (5)

Country Link
JP (2) JPS50161280A (en)
CH (1) CH565421A5 (en)
DE (1) DE2512650C2 (en)
FR (1) FR2270651B1 (en)
GB (1) GB1467213A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7604502L (en) * 1976-04-15 1977-10-16 Ericsson Telefon Ab L M OPTICAL FIRE DETECTOR
US4043742A (en) * 1976-05-17 1977-08-23 Environmental Data Corporation Automatic burner monitor and control for furnaces
JPS5934252B2 (en) * 1976-10-02 1984-08-21 国際技術開発株式会社 flame detector
JPS586995B2 (en) * 1977-02-15 1983-02-07 国際技術開発株式会社 Flame detection method
JPS586996B2 (en) * 1977-02-15 1983-02-07 国際技術開発株式会社 Flame detection method
JPS6075997A (en) * 1983-10-03 1985-04-30 日本警備保障株式会社 fire detection device
DE3501719A1 (en) * 1984-07-28 1986-01-30 Webasto-Werk W. Baier GmbH & Co, 8035 Gauting Fuel-operated heating device
SE461560B (en) * 1988-02-24 1990-02-26 Carl Goesta Ardesjoe DEVICE FOR MONITORING OF OBJECTS, SUCH AS COOKING PLATE AND ELECTRIC OVEN, WITH REGARD TO OVERHEATING
DE3924250A1 (en) * 1989-07-21 1991-02-07 Preussag Ag Feuerschutz FIRE DETECTOR
JPH04108149U (en) * 1991-02-27 1992-09-18 株式会社荏原製作所 flame sensor
DE102007039401B4 (en) * 2007-08-21 2012-07-12 Hekatron Vertriebs Gmbh Smoke detector with contamination monitoring
DE102022105306A1 (en) * 2022-03-07 2023-09-07 Fagus-Grecon Greten Gmbh & Co Kg System and method for the analysis of ignition phenomena

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS412080Y1 (en) * 1965-05-04 1966-02-12
GB1329828A (en) * 1969-11-21 1973-09-12 Emi Ltd Infra-red fire alarm apparatus

Also Published As

Publication number Publication date
FR2270651B1 (en) 1982-09-10
DE2512650A1 (en) 1975-11-20
DE2512650C2 (en) 1982-12-23
JPS5658528U (en) 1981-05-20
CH565421A5 (en) 1975-08-15
JPS50161280A (en) 1975-12-27
FR2270651A1 (en) 1975-12-05
JPS628506Y2 (en) 1987-02-27

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee