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US 5,817,993 AGranted
Monitoring of elevator door reversal data
AssigneeOtis Elevator Company
InventorsSanjay Kamani, Patrick Lusaka, Ronald R. Pepin
Life of this patent
Estimating the term…
Abstract
An elevator door reversal monitoring apparatus for monitoring an elevator door system comprises: a plurality of sensors for providing sensor signals; a door reversal state machine for providing door reversal data in response to the sensor signals; an output module for capturing the door reversal data; and an output processing module for determining a current state of the elevator door system in response to the captured door reversal data.
Claims10
An elevator door closing reversal monitoring apparatus for monitoring an elevator door system, said apparatus comprising:
- a plurality of sensors for providing sensor signals;
- a door closing reversal state machine for providing door closing reversal data in response to the sensor signals, said data including a time measurement between a start of door closing and an end of door closing. without regard to the position of the door when door closing stops;
- an output module for capturing the door reversal data;
- and
- an output processing module for determining a condition of the elevator door system in response to the captured door reversal data, wherein said door reversal state machine classifies each door reversal in response to said time measurement.
2 more elements
Dependencies are inferred from the claim text.