Capacitive sensing system for power cutting tool

A capacitive sensing system for use with a power cutting tool of the type which has an exposed, moveable blade adjacent a work surface is disclosed. The sensing system drives an excitation voltage onto the exposed blade and monitors the current drawn from the blade, detects changes in the amplitude...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Shafer, David C, Krauer, Jean-Pierre
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A capacitive sensing system for use with a power cutting tool of the type which has an exposed, moveable blade adjacent a work surface is disclosed. The sensing system drives an excitation voltage onto the exposed blade and monitors the current drawn from the blade, detects changes in the amplitude and phase and analyzes the characteristics of the changes to selectively trigger a reaction system.