Daimler Chrysler Ag

Mechaless Systems Gmbh

Michael Dietz

Gerd Reime

Juergen Setzer

Peter Langer

Andreas Rodewald

Rolf Melcher

Frank Rottmann

Jürgen Setzer

The invention relates to a device and a method for identifying an object O in an opening that can be closed by means of a mobile element (). Light is fed into at least one fiber-optic light guide () from a light source (), and variations in the received light are detected by means of at least one receiver (Ea, Eb), the fiber-optic light guide being arranged at least partially along the edge of the opening (). A first fiber-optic light guide sends light transversally to the length thereof, said light being then received by a second fiber-optic light guide transversally to the length thereof. The second fiber-optic light guide () is connected to the receiver (Eb). The fiber-optic light guides are arranged on the edge of the opening () in such a way that a light field (F) at least partially bridging the opening is produced. At least one light source () and at least one receiver (Ea, Eb) are respectively associated with each fiber-optic light guide (), and a clock circuit is used to alternately feed the light received by the respective receiver into the fiber-optic light guides. Comparison means are used to compare the signals on the receivers in order to identify the object.

Device and method for identifying an object in or on a closable opening

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Ehningen, Germany

Michael Dietz