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Title:
FLAME DETECTION METHOD AND FLAME DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2005/045379
Kind Code:
A1
Abstract:
A flame detection method capable of detecting a flame simply and effectively by using a UV detector having a comparatively small detection wavelength area. A plurality of spontaneously emitted light intensities having the same radical species but different wavelengths are measured respectively out of a spontaneously emitted light spectra of a UV area in the spontaneously emitted light components of a flame to determine emitted light intensity ratios that are mutual ratios between the measured spontaneously emitted light intensities with respective wavelengths, and a flame is detected based on the relations between those emitted light intensity ratios and flame temperatures or the relations between emitted light intensity ratios and air ratios of mixed air used for combustion. Especially, the OH zone spectrum of electron transition A2∑+→X2&Pgr from an excited state by combustion to a normal sate out of flame spontaneously emitted light components by lean combustion is measured, and emitted light intensity ratios between OH (2,0) in the vicinity of wavelength 260 nm, OH (1,0) in the vicinity of wavelength 280 nm, OH (2,1) in the vicinity of wavelength 287 nm, and OH (0,0) in the vicinity of wavelength 306 nm are determined to detect a flame state.

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Inventors:
SEKI KAZUO (JP)
KISHIMOTO KEN (JP)
Application Number:
PCT/JP2004/016405
Publication Date:
May 19, 2005
Filing Date:
November 05, 2004
Export Citation:
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Assignee:
YAMATAKE CORP (JP)
SEKI KAZUO (JP)
KISHIMOTO KEN (JP)
International Classes:
F23N5/08; (IPC1-7): G01J1/02; F23N5/08
Foreign References:
JP2000111398A2000-04-18
JPH01244214A1989-09-28
JP2002350235A2002-12-04
JP2002039864A2002-02-06
JP2000241249A2000-09-08
JPS6293485A1987-04-28
JPS60159515A1985-08-21
Attorney, Agent or Firm:
Nagato, Kanji (8-1 Shinbashi 5-chome, Minato-k, Tokyo 04, JP)
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