Flame monitoring system
AssigneeElectronics Corporation of America
InventorMalcolm F. MacDonald
Life of this patent
Estimating the term…
Abstract
A flame monitoring system includes a flame sensor for producing a flame signal as a function of flame conditions in a monitored environment and flame signal enhancing circuitry coupled to the flame sensor. The flame signal enhancing circuitry has a first response as a function of a first characteristic of the flame signal and a second response different from the first response as a function of a second characteristic of the flame signal and is arranged to combine the first and second responses to provide an enhanced flame signal representative of the monitored flame.
Claims24
A flame monitoring system comprising
- a flame sensor producing an electrical output signal having both higher frequency and lower frequency components derived from a monitored flame environment,
- and signal processing circuitry connected to said flame sensor and responsive to both said higher frequency and said lower frequency components of said output signal, said signal processing circuitry including an amplifier and a feedback network with a variable impedance and being arranged so that said higher frequency components are amplified and the amplifier gain is decreased in response to an increase in said lower frequency components such that the resulting output of said signal processing circuitry provides discrimination between the flame monitored by said sensor and other conditions in the supervised environment.
A flame monitoring system comprising:
- a flame sensor for producing a flame signal as a function of flame conditions in a monitored environment,
- flame signal enhancing circuitry coupled to said flame sensor, said flame signal enhancing circuitry having an amplifier and a feedback network with a variable impedance and being arranged so that a first characteristic of said flame signal is amplified and the amplifier gain is decreased in response to an increase in a second characteristic of said flame signal to provide an enhanced flame signal representative of the monitored flame as an output signal.
Dependencies are inferred from the claim text.