Diagnostic device for gas turbine ignition system

F - Mech Eng,Light,Heat,Weapons – 02 – P

Patent

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F02P 17/12 (2006.01) F02C 7/266 (2006.01) F02P 11/06 (2006.01) F02P 15/00 (2006.01) G01M 19/02 (2006.01)

Patent

CA 2047873

A device for diagnosing the state of health of an ignition system is provided, where the system includes at least one spark producing channel comprising an exciter, output circuit and igniter plug. The device provides a diagnosis of the state of health for both the exciter and igniter plug by monitoring the high energy pulses at the output of the exciter. By monitoring the ignition system at an intermediate point in the system such as the output of the exciter, the sensor and electronics of the device may be completely contained within the electronic environment of the exciter, thereby avoiding any need for attaching sensors at the output of the system adjacent to the igniter plug in order to diagnose the plug's state of health. As an alternative to the device being built into the ignition system, it can be incorporated into automatic test equipment that produces high energy pulses for delivery to an igniter plug to be tested. The device is capable of diagnosing failure of either the exciter or the igniter plug and may also be configured to detect the impending failure of the plug.

Cette invention concerne un dispositif de diagnostic de l'état d'un circuit d'allumage qui comprend au moins une voie de production d'étincelle formée d'un excitateur, un circuit de sortie et une bougie d'allumage. Le dispositif pose un diagnostic sur l'état de l'excitateur et de la bougie d'allumage à partir des impulsions haute énergie mesurées à la sortie de l'excitateur. En situant le contrôle du circuit d'allumage en un point intermédiaire tel que la sortie de l'excitateur, on peut intégrer le capteur et l'électronique du dispositif dans l'environnement électronique de l'excitateur et se passer de capteurs sur la sortie du circuit à proximité de la bougie d'allumage. Plutôt que d'intégrer le dispositif au circuit d'allumage, on peut aussi l'incorporer à un instrument d'essai automatisé produisant des impulsions haute énergie à acheminer à la bougie d'allumage à contrôler. Le dispositif est en mesure de diagnostiquer la défaillance aussi bien de l'excitateur que de la bougie d'allumage, et il peut également être configuré pour détecter la défaillance imminente de la bougie.

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