Industrial flame sensor communication system
OwnerGary G. Wild, John D. Eleyinventors
Life of this patent
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Abstract
A communication and data interpreting system for detecting and converting and combining multiple analog signals from flame detectors into a single analog signal and RS 485 for transmission. This system also uses an analog clamping circuit to generate the analog signal from flame rod sensors and a load resistor and a high voltage generator for generating the signal in an UV sensing tube. The input signals are then multiplexed and sent to a microcomputer. The microcomputer uses a diode and a solid state relay circuit to generate a compatible signal output to a burner control.
Claims10
A communication system for a plurality of flame sensors in a single or multiple burner system with a connection required between the sensors at a remote location and the burner control or controls, comprising in combination
- a transmitting module each having an input for connection to a flame sensing transducer exposed to a flame to be sensed, each having an output for producing an electronic level signal indicative of the sensed flame or group of sensed flames;
- a receiving module for receiving the information from the transmitting module upon detection of a flame or loss of a flame from a burner or extinguished burner and identifying the identity of the burner or extinguished burner and the time at which the burner is established or extinguished;
- a display module with memory means associated with the processor for displaying the signal status of each flame transducer and recording status information at the time of occurrence of loss of signal condition, the status information including the identity of any extinguished burner and the time at which said extinguished burner extinguished.
The combination as set forth in claim 8 wherein the flame watchdog timer has a reset input, and means coupling the reset input to the processor for enabling the flame watchdog timer in a normal mode to sense the flame present signal and provide an output signal to the transmitting module
Dependencies are inferred from the claim text.