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Flame detection apparatus and method

  • US 6,278,374 B1
  • Filed: 05/05/2000
  • Issued: 08/21/2001
  • Est. Priority Date: 05/05/2000
  • Status: Expired due to Term
First Claim
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1. A method for monitoring the status of a combustion unit having at least one burner, comprising the steps of:

  • (a) acquiring a digital image of a flame corresponding to the burner;

    (b) calculating a value for the relative light intensity of a frame defining an area of the image corresponding to the flame for the burner;

    (c) comparing the relative light intensity value against a tolerance range for the frame;

    (d) generating an alarm state output if the relative light intensity value is outside said tolerance range.

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