JPS6433419A - Flame detector - Google Patents

Flame detector

Info

Publication number
JPS6433419A
JPS6433419A JP18887187A JP18887187A JPS6433419A JP S6433419 A JPS6433419 A JP S6433419A JP 18887187 A JP18887187 A JP 18887187A JP 18887187 A JP18887187 A JP 18887187A JP S6433419 A JPS6433419 A JP S6433419A
Authority
JP
Japan
Prior art keywords
flame
threshold
photoelectric
wavelength
temperature
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
JP18887187A
Other languages
Japanese (ja)
Other versions
JP2622382B2 (en
Inventor
Kazuhiro Yamazaki
Koujirou Yamada
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.)
Mitsubishi Power Ltd
Original Assignee
Babcock Hitachi KK
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 Babcock Hitachi KK filed Critical Babcock Hitachi KK
Priority to JP62188871A priority Critical patent/JP2622382B2/en
Publication of JPS6433419A publication Critical patent/JPS6433419A/en
Application granted granted Critical
Publication of JP2622382B2 publication Critical patent/JP2622382B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/60—Radiation pyrometry, e.g. infrared or optical thermometry using determination of colour temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
    • F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Control Of Combustion (AREA)

Abstract

PURPOSE:To provide a flame detector which has high decision accuracy, by a method wherein, by using a photoelectric coverting element having peak sensitivity at a different wavelength, a flame temperature is determined from an output ratio of each wavelength, and by using a threshould depending upon the flame temperature, point extinguishment of flame is decided. CONSTITUTION:A photo signal emitted from flame is sent to a photoelectric amplifying part 5 by means of an optical fiber head 3 and an optical fiber 4 for relay. In the amplifying part, by using a photoelectric converting element having spectral-response characteristic having peak in visual and near infrared rays, conversion into an electric signal is effected, and only an AC component thereof is extracted. A threshold set part 10 is provided for setting a flame identification threshold depending upon the temperature of flame by using a ratio between outputs AC1 and AC2 produced after the AC component of each wavelength from the photoelectric converting amplifying part 5 is forced to pass a band-pass filter part 6. By effecting comparison with a signal level entering a flame identification part based on the threshold, decision on ignition and extinguishment of a burner is effected. By setting threshold for identify ignition and extinguishing of a burner flame according a change in a combustion state occasioned by a change in a load and variation of a kind of fuel, precision of a flame detector can be maintained.
JP62188871A 1987-07-30 1987-07-30 Flame detector Expired - Fee Related JP2622382B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62188871A JP2622382B2 (en) 1987-07-30 1987-07-30 Flame detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62188871A JP2622382B2 (en) 1987-07-30 1987-07-30 Flame detector

Publications (2)

Publication Number Publication Date
JPS6433419A true JPS6433419A (en) 1989-02-03
JP2622382B2 JP2622382B2 (en) 1997-06-18

Family

ID=16231333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62188871A Expired - Fee Related JP2622382B2 (en) 1987-07-30 1987-07-30 Flame detector

Country Status (1)

Country Link
JP (1) JP2622382B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5934074A (en) * 1996-11-07 1999-08-10 Toyoda Koki Kabushiki Kaisha Hydraulic power steering apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54146596A (en) * 1978-04-25 1979-11-15 Cerberus Ag Flame detector
JPS6249120A (en) * 1985-08-28 1987-03-03 Babcock Hitachi Kk Flame sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54146596A (en) * 1978-04-25 1979-11-15 Cerberus Ag Flame detector
JPS6249120A (en) * 1985-08-28 1987-03-03 Babcock Hitachi Kk Flame sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5934074A (en) * 1996-11-07 1999-08-10 Toyoda Koki Kabushiki Kaisha Hydraulic power steering apparatus

Also Published As

Publication number Publication date
JP2622382B2 (en) 1997-06-18

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees