SYSTEM FOR PROCESSING A FLAME SENSOR OUTPUT SIGNAL

In a flame safeguard control system (10) using a microcomputer (16) the microcomputer responds to the flame signal (22) as provided from a normal flame amplification chain (20) and an analog-to-digital converter (32). A safety backup circuit in the form of a redundant flame signal detection circuit...

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Bibliographische Detailangaben
Hauptverfasser:	LANDIS, WILLIAM R, PATTON, PAUL B
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION APPARATUS COMBUSTION PROCESSES CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING FUNCTIONAL ELEMENTS OF SUCH SYSTEMS HEATING LIGHTING MECHANICAL ENGINEERING MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS REGULATING REGULATING OR CONTROLLING COMBUSTION WEAPONS
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Beschreibung
Zusammenfassung:	In a flame safeguard control system (10) using a microcomputer (16) the microcomputer responds to the flame signal (22) as provided from a normal flame amplification chain (20) and an analog-to-digital converter (32). A safety backup circuit in the form of a redundant flame signal detection circuit (45) analyzes the analog signal being provided to the analog-to-digital converter. In the event that the microcomputer (16) is unable to shut the main fuel valve off, the redundant flame detection circuit becomes operative to deenergize part (62) of a series circuit (62, 36) including the relay (40) for the main fuel valve (11).