Presence detector for a door assembly
First Claim
1. A presence detector for a door assembly including a door which closes a door entrance and which is characterized by a position relatively to the door entrance, the detector comprising:
- a transducer assembly mounted to the door assembly i) that emits a plurality of ultrasound detecting beams adjacent the door entrance yielding a detecting zone adjacent the door entrance, ii) that modifies the detecting zone in accordance with the position of the door and, iii) that triggers a detecting signal indicative of a body located said adjacent the door entrance when the body intersects at least one of the plurality of ultrasound detecting beams;
wherein each of the plurality of ultrasound detecting beams being characterized by a length, wherein the transducer assembly further modifies the detecting zone according to environmental changes adjacent the door entrance so that the length of each of the plurality of ultrasound detecting beams is invariant with the environmental changes.
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Accused Products
Abstract
A presence detector for a door assembly which includes a door closing a door entrance is described herein. The detector includes a transducer assembly mounted to the door assembly for emitting at least one ultrasound detecting beam adjacent the door entrance and for triggering a detecting signal indicative of a body located adjacent the door entrance when the body intersects the at least one ultrasound detecting beam and a controller for receiving information indicative of a position of the door and for controlling the emission of the at least one detecting beam accordingly with the position of the door. The detector assembly operates in crossing, ranging or dual modes.
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Citations
31 Claims
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1. A presence detector for a door assembly including a door which closes a door entrance and which is characterized by a position relatively to the door entrance, the detector comprising:
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a transducer assembly mounted to the door assembly i) that emits a plurality of ultrasound detecting beams adjacent the door entrance yielding a detecting zone adjacent the door entrance, ii) that modifies the detecting zone in accordance with the position of the door and, iii) that triggers a detecting signal indicative of a body located said adjacent the door entrance when the body intersects at least one of the plurality of ultrasound detecting beams; wherein each of the plurality of ultrasound detecting beams being characterized by a length, wherein the transducer assembly further modifies the detecting zone according to environmental changes adjacent the door entrance so that the length of each of the plurality of ultrasound detecting beams is invariant with the environmental changes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification