Burner flame detection

Details Burner flame detection Burner flame detection

1979-06-26

1981-07-21

Ruggiero, Joseph F.

Boots, shoes, and leggings

250554, 340578, 328 6, G06F 1520, G08B 1712

Patent

active

042801842

ABSTRACT:
Method and apparatus for evaluating the quality of a flame in response to outputs from a flame sensor.
The present invention includes a method and apparatus in which output pulses from a flame sensor are continuously counted.The number of pulses is accumulated over a time interval of a predetermined length and compared with a threshold value. The accumulated total is continuously updated to reflect the pulses received over the previous time interval to effectively provide a moving time-window of a fixed length over which pulses from the flame sensor are accumulated. Other additional checks may be made to ascertain that a flame is present, including the time over which no pulses are detected and a long-term average of the number of pulses.
A preferred embodiment disclosed in which numerous self-checking features are incorporated, and which includes a novel bar-graph type of display for displaying flame quality and diagnostic information.

REFERENCES:
patent: 3196273 (1965-07-01), Abromaitis
patent: 3283154 (1966-11-01), Giuffrida et al.
patent: 3416041 (1968-12-01), Giuffrida et al.
patent: 3651327 (1972-03-01), Thomson
patent: 3936648 (1976-02-01), Cormault et al.
patent: 3958126 (1976-05-01), Bryant
patent: 3967255 (1976-06-01), Oliver et al.
patent: 3995221 (1976-11-01), MacDonald
patent: 4157506 (1979-06-01), Spencer

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