Flame monitoring methods and apparatus
November 12, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesFlame detector for use with a burner Air fuel ratio control Burner flame sensing system and method Integrated imaging sensor/neural network controller for combustion systems Combustion control method Flame detector self diagnostic system employing a modulated optical signal in composite with a flame detection signal Real-time combustion controller Infrared emittance combustion analyzer Signal processing system for combustion diagnostics Apparatus for detecting flame conditions in combustion systems InventorsAssigneeApplicationNo. 438781 filed on 11/12/1999US Classes:431/12, Controlling or proportioning feed431/76, Combustion product composition sensor431/79Photoelectric sensorExaminersPrimary: Lazarus, Ira S.Assistant: Cocks, Josiah C. Attorney, Agent or FirmInternational ClassF23N 005/00Foreign Application Priority Data1998-12-16 GBAbstractIn an apparatus for monitoring a hydrocarbon flame, a plurality of radiation sensors detect electromagnetic radiation emitted by the flame. Each of the sensors is provided with a narrow band filter so that the corresponding sensor is responsive only to a narrow range of wavelengths. In this manner, one of the sensors is made responsive to emissions due to transient species in the flame and one of the sensors is made responsive to emissions from a non-transient species in the combustion region. The signals from the radiation sensors are converted to digital and applied to a central processing unit where they are compared to produce an output indicative of the combustion conditions in the flame. An output unit responds to the output signal from the central processing unit to adjust the air fuel ratio in the flame to a desired level, such as just above stoichiometric. | |
