Fault detection in a flame scanner

Details Fault detection in a flame scanner Fault detection in a flame scanner

G - Physics

08

B

340/77

G08B 29/00 (2006.01) F23N 5/08 (2006.01)

Patent

CA 1164546

IMPROVED FAULT DETECTION IN A FLAME SCANNER ABSTRACT A flame scanner having a sensing circuit 10 utilizing a photosensitive device 12 for monitoring and a logic circuit 20 which includes a flame detection circuit 22 and a fault detection circuit 24. The photosensitive device produces a current signal 13, indicat- ive of the intensity of the flame, which is transmitted to the flame detection circuit and the fault detection circuit for simultaneous and independent processing. The flame detection circuit continuously processes the signal to determine if a stable flame is present, while the fault detection circuit continuously monitors the integrity of the photosensitive device and its associated sensing circuitry.

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