Door detection system and method
AssigneeG.A.L. Manufacturing Company, LLC
InventorsJames Varon, Walter Glaser
Life of this patent
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Abstract
In an embodiment, a door detection system may include a transmitter, a receiver, a reflector, and one or more processors. The transmitter positioned on an elevator car door transmits a signal towards a reflector on a hoistway door and the reflector reflects the signal towards the receiver when the hoistway door is properly positioned with respect to the elevator door. The one or more processors determine whether the hoistway door is properly positioned with respect to the elevator car door based on the reflected signal received by the receiver. If the hoistway door is not properly positioned, the elevator car is prevented from moving. If the hoistway door is properly positioned, the elevator car is free to move.
Claims13
A door detection system comprising:
- an elevator car door that moves towards and away from an elevator door frame;
- a hoistway door that moves towards and away from the elevator door frame;
- a transmitter-receiver positioned on the elevator car door with a first face configured to transmit a first signal and a second face configured to transmit and receive a second signal;
- a first receiver positioned on the elevator door frame configured to receive the first signal;
- and
- a reflector positioned on the hoistway door substantially opposite the second face when the elevator car door and the hoistway door are closed;
- wherein the transmitter-receiver includes one or more processors configured to:
- detect the second signal reflected from the reflector,
- determine whether the hoistway door is properly positioned with respect to the elevator car door based on the detected second signal, and
- send instructions to the elevator detection system to keep the elevator car stationary when the hoistway door is open to a different extent than the elevator car door such that the hoistway door is not aligned with respect to the elevator car door.
A door detection system comprising:
- a first pair of contacts configured to indicate when an elevator car door of an elevator car is closed;
- a second pair of contacts configured to indicate when a hoistway door is closed;
- a transmitter positioned on the elevator car door configured to transmit a signal in a direction perpendicular to the elevator car door;
- a reflector positioned on the hoistway door substantially opposite the transmitter when the elevator car door and the hoistway door are closed;
- a receiver configured to receive the signal reflected from the reflector;
- and
- one or more processors configured to:
- detect the signal reflected from the reflector using the receiver,
- determine whether the hoistway door is aligned with respect to the elevator car door based on the signal, and
- send instructions to keep the elevator car stationary when the hoistway door is open to a different extent than the elevator car door such that the hoistway door is not aligned with respect to the elevator car door.
A door detection system comprising:
- one or more first transmitters positioned on an elevator car door of an elevator car, the one or more first transmitters facing in a first direction parallel to the elevator car door and being configured to transmit a first signal;
- one or more first receivers positioned on an elevator car door frame of the elevator car substantially opposite the one or more first transmitters;
- one or more second transmitters positioned on the elevator car door, the one or more second transmitters facing in a second direction perpendicular to the first direction and being configured to transmit a second signal;
- one or more second receivers positioned on the elevator car door facing in the second direction;
- a reflector positioned on a hoistway door substantially opposite to the one or more second transmitters and the one or more second receivers, when the elevator car door and the hoistway door are closed;
- and
- one or more processors configured to:
- detect the first signal using the one or more first receivers,
- determine whether the elevator car door is closed based on the detected first signal,
- detect the second signal using the one or more second receivers,
- determine whether the hoistway door is aligned with respect to the elevator door in the second direction based on the detected second signal, and
- send instructions to an elevator system to keep the elevator car stationary when either the elevator car door is not closed or the hoistway door is not aligned with respect to the elevator car door in the second direction.
Dependencies are inferred from the claim text.