Signal processing technique for improved flame scanner discrimination
First Claim
1. A method to discriminate flame between a first flame having an associated first flame attribute and a second flame having an associated second flame attribute, wherein said first and second flames are different and said first and second flame attributes are different, said first and second flames being viewed by a single flame scanner and said flame scanner producing a flame signal indicative of said first and second flames, the method comprising:
- simultaneously processing said flame signal to enhance said first flame attribute and to enhance said second flame attribute;
determining when said enhanced first flame attribute exceeds an associated predetermined threshold; and
determining when said enhanced second flame attribute exceeds an associated predetermined threshold.
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Abstract
A signal processing technique that allows the flame signal from a first source of flame and the flame signal from a second source of flame to be discriminated from each other when only both the first and second flame signals are viewed by the same flame scanner. The signal from the flame scanner is processed to enhance one or more of the attributes associated with the first flame and is simultaneously processed to enhance one or more attributes associated with the second flame.
22 Citations
13 Claims
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1. A method to discriminate flame between a first flame having an associated first flame attribute and a second flame having an associated second flame attribute, wherein said first and second flames are different and said first and second flame attributes are different, said first and second flames being viewed by a single flame scanner and said flame scanner producing a flame signal indicative of said first and second flames, the method comprising:
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simultaneously processing said flame signal to enhance said first flame attribute and to enhance said second flame attribute; determining when said enhanced first flame attribute exceeds an associated predetermined threshold; and determining when said enhanced second flame attribute exceeds an associated predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A fossil fuel fired steam generator comprising:
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a source for producing a first flame, said first flame having a first flame attribute; a source for producing a second flame, said second flame having a second flame attribute, said second flame being different from said first flame and said second flame attribute being different from said first flame attribute; a flame scanner for viewing both said source of said first flame and said source of said second flame and producing a flame signal indicative of said first flame and of said second flame; means for simultaneously processing said flame signal to enhance said first flame attribute and to enhance said second flame attribute; and means for determining when said enhanced first flame attribute exceeds an associated predetermined threshold and when said enhanced second flame attribute exceeds an associated predetermined threshold. - View Dependent Claims (10, 11, 12, 13)
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Specification