Device and method for identifying an object in or on a closable opening
First Claim
1. A device for identifying an object in or on a closable opening, comprising a device for opening and closing the opening by means of a movable part and an optoelectronic detection mechanism for identifying the object, which feeds light into at least one first light guide and at least one second light guide by means of at least one light source and detects changes in the received light by means of at least one receiver,wherein each of the first light guide and the second light guide has a means for emitting light transversely to its longitudinal extent and a means for receiving light transversely to its longitudinal extent, while being in operative connection with the at least one receiver,wherein the first and second light guides are arranged at the edge of the opening in such a way that a bidirectional light field is produced between them which at least partially bridges the opening,wherein a clock circuit is provided, which feeds light in an alternating manner into the first and second light guides, which light is received by the at least one receiver, andwherein a comparison means is provided for comparing the signals present at the at least one receiver to identify the object.
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Accused Products
Abstract
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 (12). Light is fed into at least one fiber-optic light guide (33, 34) from a light source (1, 2), 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 (11). 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 (34) is connected to the receiver (Eb). The fiber-optic light guides are arranged on the edge of the opening (11) in such a way that a light field (F) at least partially bridging the opening is produced. At least one light source (1, 2) and at least one receiver (Ea, Eb) are respectively associated with each fiber-optic light guide (33, 34), 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.
22 Citations
28 Claims
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1. A device for identifying an object in or on a closable opening, comprising a device for opening and closing the opening by means of a movable part and an optoelectronic detection mechanism for identifying the object, which feeds light into at least one first light guide and at least one second light guide by means of at least one light source and detects changes in the received light by means of at least one receiver,
wherein each of the first light guide and the second light guide has a means for emitting light transversely to its longitudinal extent and a means for receiving light transversely to its longitudinal extent, while being in operative connection with the at least one receiver, wherein the first and second light guides are arranged at the edge of the opening in such a way that a bidirectional light field is produced between them which at least partially bridges the opening, wherein a clock circuit is provided, which feeds light in an alternating manner into the first and second light guides, which light is received by the at least one receiver, and wherein a comparison means is provided for comparing the signals present at the at least one receiver to identify the object.
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17. A method for identifying an object in or on an opening which can be closed by means of a movable part, comprising the steps of:
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arranging a plurality of light guides along the opening including at least one first and at least one second light guide, wherein each of the first light guide and the second light guide has a means for emitting light transversely to its longitudinal extent and a means for receiving light transversely to its longitudinal extent; emitting light in an alternating manner from the at least one first light guide transversely to its longitudinal extent and then the at least one second light guide transversely to its longitudinal extent to form a bidirectional light field at least partially bridging the opening; receiving light emitted from one light guide by means of at least one receiver that is in operative connection with the other light guide; and comparing the signals present at the at least one receiver to identify the object. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification