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AssigneeOtis Elevator Company
InventorsRichard D. Pustelniak, Teril W. Morton
Estimating the term…
A system and an associated method of detecting an object in a three-dimensional field adjacent to a doorway, such as an elevator doorway, uses an array of energy emitters that emit three-dimensional energy signals into the field and an array of energy receivers that receive the energy signals reflected from the object. The signals are sampled a predetermined number of times. In one embodiment, if the lowest value sampled signal reaches a predetermined threshold, an object detection signal is generated. In an alternative embodiment, if the sampled signals are within a predetermined variance range, the object detection signal is generated. In another alternative embodiment, if a predetermined modulation code is detected within a sampled signal, the object detection signal is generated.
A method of detecting an object in a zone of detection using a plurality of pairs of three dimensional energy emitters and receivers, wherein the emitters emit energy beams in a predetermined angle at the object and the receivers sense the energy beams reflected from the object, the method comprising:
A system for detecting in object in a zone of detection comprising:
Dependencies are inferred from the claim text.