Electric arc monitoring systems

G - Physics – 01 – R

Patent

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Details

G01R 31/08 (2006.01) G01R 23/18 (2006.01) G01R 29/08 (2006.01)

Patent

CA 2298789

Electric arc monitoring is effected by exploiting the discovery that electric arcs are fractal phenomena with all essential information that signifies "arc" contained in each fractal subset. These fractal subsets are logarithmically distributed over the arc spectrum. Monitoring of arcs is most advantageously effected on a fractal subset of low logarithmic order where the amplitude is higher pursuant to the 1/f characteristic of electric arcs (22), where cross-induction among neighboring circuits is lower, and where travel between the arc and the arc signature pickup (23) is longer than at the high frequencies customary for arc detection. Fractal subset transformation reduces the danger of false alarms. Arc signature portions may be processed in out of phase paths or treated as modulated carriers.

On contrôle les arcs électriques en exploitant la découverte selon laquelle les arcs électriques sont des phénomènes fractals, toutes les informations essentielles qui signifient "arc" étant contenues dans chaque sous-ensemble fractal. Ces sous-ensembles fractals sont distribués d'une manière logarithmique sur l'ensemble du spectre de l'arc. On effectue de la manière la plus avantageuse le contrôle des arcs sur un sous-ensemble fractal d'un ordre logarithmique faible, dans lequel l'amplitude est supérieure du fait de la caractéristique 1/f des arcs (22), l'induction croisée entre circuits voisins est plus faible et le trajet entre l'arc et le point de détection de la signature de l'arc (23) est plus long qu'aux hautes fréquences utilisées habituellement pour la détection d'arcs. La transformation du sous-ensemble réduit le risque de fausse alarme. Les différentes parties d'une signature d'arc peuvent être traitées dans des voies déphasées ou comme des porteuses modulées.

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