Door sensor system
First Claim
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1. A sensor system for an automatic door system comprising:
- a plurality of sensor units, each said sensor unit comprising;
transmitter means for emitting infrared radiation so as to define a detection zone Zd;
receiver means for receiving reflected radiation from zone Zd;
presence zone means for defining a presence zone Zp in said zone Zd;
motion zone means for defining a motion zone Zm in said zone Zd;
detection logic means responsive to said receiver means for detecting the presence of a foreign object in zone Zp and the motion of a foreign object in zone Zm and generating a detection signal indicative thereof;
hold open output means responsive to said detection output signal for generating a hold open output signal for a pre-established time interval;
synchronization means for synchronizing the operation of said sensor units; and
mounting means for mounting said sensor units so that at least a pair of said zones Zp intersect.
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Abstract
A sensor system for an automatic sliding door employs multiple sensor modules. Each of the sensor modules includes both a presence sensor and a motion sensor. In addition, each of the sensor units includes switches for adjusting the size of the presence zone, for selecting either a continuous or a triggered scan mode and for selecting an operating phase to prevent interference. The sensor units are generally mounted above the threshold of the doorway and their opeations are synchronized to provide both a traffic sensor and a safety sensor for a sliding door system.
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Citations
29 Claims
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1. A sensor system for an automatic door system comprising:
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a plurality of sensor units, each said sensor unit comprising; transmitter means for emitting infrared radiation so as to define a detection zone Zd; receiver means for receiving reflected radiation from zone Zd; presence zone means for defining a presence zone Zp in said zone Zd; motion zone means for defining a motion zone Zm in said zone Zd; detection logic means responsive to said receiver means for detecting the presence of a foreign object in zone Zp and the motion of a foreign object in zone Zm and generating a detection signal indicative thereof; hold open output means responsive to said detection output signal for generating a hold open output signal for a pre-established time interval; synchronization means for synchronizing the operation of said sensor units; and mounting means for mounting said sensor units so that at least a pair of said zones Zp intersect. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 24)
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18. A sensor system for a sliding door system comprising:
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a plurality of sensor units, each said sensor unit comprising; transmitter means comprising an array of emitters for emitting infrared radiation so as to define a detection zone Zd; receiver means for receiving reflected radiation from zone Zd; presence zone means for defining a presence zone Zp in said zone Zd; motion zone means for defining a motion zone Zm in said zone Zd; detection logic means responsive to said receiver means for detecting the presence of a foreign object in zone Zp and the motion of a foreign object in zone Zm and generating a detection signal indicative thereof; hold open output means selectively responsive to said detection output signal for generating a hold open output signal; and selector means for selecting a continuous mode or trigger mode of operation of said sensor unit, said trigger mode operation being responsive to a trigger input for selectively controlling the transmission of the detection signal; synchronization means for synchronizing the operation of said sensor units; and connector means comprising a parallel circuit for combining said hold open output signals. - View Dependent Claims (19, 20, 21)
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22. A sensor system for an automatic door system of a type wherein at least one sliding door is moveable across the threshold comprising:
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a plurality of sensor units, each said sensor unit comprising; transmitter means for emitting infrared radiation so as to define a detection zone Zd; receiver means for receiving reflected radiation from zone Zd; presence zone means for defining a presence zone Zp in said zone Zd; motion zone means for defining a motion zone Zm in said zone Zd; detection logic means responsive to said receiver means for detecting the presence of a foreign object in zone Zp and the motion of a foreign object in zone Zm and generating a detection signal indicative thereof; hold open output means responsive to said detection output signal for generating a hold open output signal; synchronization means for synchronizing the operation of said sensor units; and mounting means for mounting said sensor units generally above the threshold so that at least a pair of said zones Zp intersect. - View Dependent Claims (23, 25, 26, 27, 28, 29)
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Specification