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US 2008/0156591 A1Published application
Elevator Car Position Detection
OwnerMichael J. Traceyinventor
Life of this patent
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Abstract
A device (40) for providing information regarding the position of an elevator car door (34) relative to a hoistway door (30) includes a reflector (42) supported on the hoistway door (30). A sensor (44) supported on an elevator car door (34) includes a plurality of sensing elements (46-50) for emitting radiation toward the reflector (42). Received radiation reflected from the reflector (42) provides an indication of the position of the car door (34) relative to the hoistway door (30).
Claims21
1-20. (canceled)
A device for determining a position of a door in an elevator system, comprising:
- a reflector that is mountable on one of a hoistway door or an elevator car door;
- and
- a sensor that is mountable on the other of the elevator car door or the hoistway door, the sensor comprising a plurality of sensor elements spaced apart in a selected arrangement, the sensor comprising an emitter portion configured to emit radiation in a direction toward the reflector and each sensor element comprising at least a receiver portion configured to receive reflected radiation from the reflector when the sensor is aligned with the reflector, at least a first one of the sensor elements providing position information within a first range and at least a second one of the sensor elements providing position information within a second, smaller range.
An elevator door assembly, comprising:
- at least one hoistway door;
- at least one elevator car door;
- at least one reflector supported on one of the hoistway door or the elevator car door;
- and
- a sensor supported on the other of the elevator car door or the hoistway door, the sensor comprising a plurality of sensor elements spaced apart in a selected arrangement, the sensor comprising an emitter portion configured to emit radiation in a direction toward the reflector, each sensor element comprising at least a receiver portion configured to receive reflected radiation from the reflector when the sensor is aligned with the reflector, at least a first one of the sensor elements providing position information within a first range and at least a second one of the sensor elements providing position information within a second, smaller range.
2 more elements
Dependencies are inferred from the claim text.