JPS6433419A - Flame detector - Google Patents
Flame detectorInfo
- 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
Links
- 239000013307 optical fiber Substances 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 239000000446 fuel Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 230000003595 spectral effect Effects 0.000 abstract 1
- 230000000007 visual effect Effects 0.000 abstract 1
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.
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)
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)
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 |
-
1987
- 1987-07-30 JP JP62188871A patent/JP2622382B2/en not_active Expired - Fee Related
Patent Citations (2)
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)
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 |