Sensor for use with automatic doors
First Claim
1. Method for controlling an automatic door by detecting traffic in a detection zone before the automatic door, wherein an 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, an output signal of infrared detector is processed by an infrared detection algorithm, wherein when a pedestrian enters said detection zone with an appropriate normal trajectory, said traffic rejection algorithm validates the trajectory and said microwave detector triggers opening of said automatic door, when a pedestrian enters said detection zone with a parallel trajectory, the parallel traffic rejection algorithm prevents said door from opening unless the target trajectory is so close to said door that a wide non-discriminative motion detector lobe of said microwave detector and an infrared lobe of said infrared detector are detecting simultaneously and the processor triggers opening of said door.
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Accused Products
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).
37 Citations
13 Claims
- 1. Method for controlling an automatic door by detecting traffic in a detection zone before the automatic door, wherein an 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, an output signal of infrared detector is processed by an infrared detection algorithm, wherein when a pedestrian enters said detection zone with an appropriate normal trajectory, said traffic rejection algorithm validates the trajectory and said microwave detector triggers opening of said automatic door, when a pedestrian enters said detection zone with a parallel trajectory, the parallel traffic rejection algorithm prevents said door from opening unless the target trajectory is so close to said door that a wide non-discriminative motion detector lobe of said microwave detector and an infrared lobe of said infrared detector are detecting simultaneously and the processor triggers opening of said door.
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3. Sensor (8) for use with an automatic door comprising:
- at least two detectors (10, 12);
one of said at least two detectors is a microwave detector (10) and said other of said at least two detectors is an infrared detector (12);
each of said detectors generate signals;
a processor (14), said processor processes said signals generated by said at least two detectors;
said processor simultaneously and continuously uses information from both signals of said detectors (10, 12) to dynamically optimize overall detecting performance in surveillance areas (20, 22); and
, a plurality of outputs (16, 18) activated by different combinations of said signals generated by said at least two detectors (10, 12). - View Dependent Claims (4, 5, 6, 7, 8, 9)
- at least two detectors (10, 12);
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10. Sensor (8) for use with an automatic door comprising:
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an infrared near field curtain detector and a microwave far field motion detector (10), said microwave detector capable of detecting even very slow movements providing quasi-presence detection;
said infrared detector is activated over a short distance, activating the opening of said door and said microwave detector is activated over a greater distance ensuring that said door remains open if movement is detected;
each of said detectors generates signals;a processor (14);
said processor processes said signals generated by said at least two detectors, said processor simultaneously uses information from both signals of said detectors (10, 12) to optimize overall detecting performance in surveillance area (20, 22) sensed by sensor (8),said processor (14) is adapted to generate a single output signal based on a combination of said signals generated by said microwave detector (10) and said infrared curtain detector (12);
said processor (14) activating quasi-presence detection of said microwave detector (10) upon activation of said infrared detector (12); andsaid processor (14) is adapted to shut off said microwave detector (10) and process only said signal generated by said infrared detector (12) if no presence and motion is detected in both surveillance areas (20, 22). - View Dependent Claims (11)
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12. Sensor (8) for use with an automatic door comprising:
- at least two detectors (10, 12), one of said at least two detectors is a microwave detector (10) and said other of said at least two detectors is an infrared detector (12);
each of said detectors generates signals;
a processor (14);
said processor processes said signals generated by said at least two detectors;
said processor simultaneously uses information from both signals of said detectors (10, 12) to optimize overall detecting performance in surveillance areas of (20, 22);
a plurality of outputs (16, 18) activated by different combinations of said signals generated by said at least two detectors (10, 12);
said microwave detector (10) is for motion detection and said infrared curtain detector (12) is for presence detection;
said processor (14) is adapted to generate a single output signal based on a combination of said signals generated by said microwave detector (10) and said infrared detector (12) and said processor (14) activates said presence detection of said infrared detector (12) upon activation of said microwave detector (10); and
, said processor (14) is adapted to shut off said infrared curtain detector (12) and process only said signal generated by said microwave detector (10) if no presence and motion is detected in both surveillance areas (20, 22).
- at least two detectors (10, 12), one of said at least two detectors is a microwave detector (10) and said other of said at least two detectors is an infrared detector (12);
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13. Sensor (8) for use with an automatic door comprising:
- at least two detectors (10, 12);
one of said at least two detectors is a microwave detector (10) and said other of said at least two detectors is an infrared detector (12);
each of said detectors generates signals;
a processor (14);
said processor processes said signals generated by said at least two detectors;
said processor simultaneously uses information from both signals of said detectors (10, 12) to optimize overall detecting performance in surveillance areas (20, 22);
a plurality of outputs (16, 18) activated by different combinations of said signals generated by said at least two detectors (10, 12);
said infrared detector (12) is a near field detector and said microwave detector (10) is a far field motion detector;
said microwave detector (10) capable of detecting even very slow movements providing quasi-presence detection;
said infrared detector (12) activated over a short distance and opening said door;
said microwave detector (10) activated over a greater distance than said infrared detector ensuring that said door remains open if movement is detected;
said processor (14) adapted to generate a single output signal based on a combination of said signals generated by said microwave detector (10) and said infrared detector (12);
said processor (14) activating quasi presence detection of said microwave detector (10) upon activation of said infrared detector (12); and
, said infrared detector (12) switchable to a presence detection mode if motion has been detected in surveillance area (20).
- at least two detectors (10, 12);
Specification