Method of improving the landing of a hydraulic elevator car
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United States of America Patent
Stats
-
Feb 12, 1991
Grant Date -
N/A
app pub date -
Feb 16, 1989
filing date -
Feb 16, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of improving the landing of a hydraulic elevator car which responds to slowdown and leveling indicia associated with each floor of a building served by the car. The method, which utilizes signals which are already generated relative to the car traveling past slowdown and leveling indicia, provides an optimum deceleration time TOPT for the car to initiate deceleration and arrive at a leveling zone of a target floor, defined by leveling indicia. The method further delays the initiation of deceleration of the car, after the car reaches slowdown indicia for the target floor, by a predetermined time delay Td. The method determines the actual time TACT for the car to travel between slowdown and leveling indicia for the target floor, and then changes Td, if necessary, in a direction which tends to optimize Td, when TACT - Td is not equal to TOPT.
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