Electronic detecting of flame loss by sensing power output...

F - Mech Eng,Light,Heat,Weapons – 23 – N

Patent

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F23N 5/10 (2006.01)

Patent

CA 2394965

An apparatus for and method of rapidly detecting a flame out condition. A thermopile receives heat energy from the flame and generates electrical power to enable operation of a microprocessor. This microprocessor periodically measures the output voltage of the thermopile at one second intervals. An average is taken of eight consecutive samples. A running history of eight averages is stored within a FIFO which serves as a history queue. This FIFO thus stores a digitized signature of the flame condition over the previous 64 seconds. Analysis by the microprocessor is able to make an early detection of the flame out condition by utilizing the current voltage measurements and the FIFO contents.

Cette invention concerne un dispositif et une technique permettant de détecter rapidement l'extinction d'une flamme. Une thermopile reçoit de l'énergie thermique de la flamme et produit l'énergie électrique nécessaire au fonctionnement d'un microprocesseur. Ce microprocesseur mesure périodiquement, toutes les secondes, la tension de sortie de la thermopile. Une moyenne est calculée à partir de huit échantillons consécutifs. Un historique dynamique de huit moyennes est stocké sur une base FIFO (premier entré, premier sortie) et fait office de liste d'attente historique, Ainsi, ce système FIFO permet de stocker une signature numérique de l'état de la flamme portant sur les 64 secondes écoulées. Cette analyse effectuée par le microprocesseur permet de détecter rapidement un état d'extinction de la flamme grâce aux relevés de tension du moment et aux contenus FIFO.

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