Fire detection method and apparatus using overlapping spectral bands
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United States of America Patent
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Nov 30, 1999
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N/A
app pub date -
May 7, 1997
filing date -
May 7, 1997
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Abstract
An optical fire detector employs two or more sensors operating a different spectral bands. The spectral bands are selected to have approximately coincident cut-off wavelengths in order to make the detector's ability to positively identify a fire more uniform over its field of view. The use of three overlapping spectral bands provides the detector with enhanced detection capabilities for large, hot fires that behave like black body radiators.
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