Sensor for use with automatic doors
AssigneeB.E.A. s.a. Parc scientifique du Sart-Tilman
InventorsEmmanuel Eubelen, Stephane Bronsard, Thierry Jongen
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Abstract
The present invention relates to a sensor (8) for use with an automatic door comprising at least two detectors (10, 12) based on different technologies, a processor (14) for processing the signals generated by at least two detectors (10, 12) in that it simultaneously uses the signals in order to combine the signals and to accurately detect the situation in a surveillance area (20, 22) sensed by the sensor (8).
Claims19
Sensor (8) for use with an automatic door comprising at least two detectors (10, 12) based on different technologies, a processor (14) for processing the signals generated by said at least two detectors, characterized in that said processor simultaneously makes use of the information of both signals of the detectors (10, 12) in a combined analysis to optimize the overall detecting performance in a surveillance area (20, 22) sensed by the sensor (8).
Method for controlling an automatic door by detecting traffic in a detection zone before the automatic door, wherein the output signal of a microwave detector is processed by a Doppler sensing algorithm and in parallel by a traffic rejection algorithm for detecting over a restricted set of trajectories, the output signal of an infrared curtain detector is processed by an infrared curtain detection algorithm, wherein when a pedestrian enters the detection zone with an appropriate normal trajectory, the traffic rejection algorithm validates the trajectory and the microwave detector triggers the opening of the automatic door, when the pedestrian enters the detection zone with a parallel trajectory, the parallel traffic rejection algorithm prevents the door from opening unless the target trajectory is so close to the door that the wide non-discriminative motion detection lobe and the infrared curtain lobe are detecting simultaneously and the processor triggers the opening of the door.
Dependencies are inferred from the claim text.