Flame detector

Details Flame detector Flame detector

2007-11-20

2007-11-20

Lee, John R. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Flame light source

C250S339150

Reexamination Certificate

active

11385759

ABSTRACT:
A flame detector having the following features is capable of simple and reliable determination of the occurrence or nonoccurrence of fire resulting from a flame based on waveforms detected from detection signals from infrared sensors. The flame detector includes an infrared sensor for detecting an infrared ray, a RAM serving as a waveform storing unit for storing a plurality of waveforms detected from an output signal from the infrared sensor, and a CPU serving as a wavelength determining unit for determining succession of waveforms when at least a first predetermined number of waveforms stored in the RAM are produced for a first predetermined time and at least a second predetermined number of waveforms different from the first predetermined number of waveforms are produced for a second predetermined time different from the first predetermined time.

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patent: 1 233 386 (2002-08-01), None
patent: 2003-106898 (2003-04-01), None
patent: 2004-4023 (2004-01-01), None

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