Terminal slowdown speed pattern generator
AssigneeWestinghouse Electric Corp.
InventorsTac H. Nguyen, Alan L. Husson
Life of this patent
Estimating the term…
Abstract
Methods and apparatus for providing a desired terminal slowdown speed pattern as an elevator car approaches a terminal floor in the terminal slowdown zone. Markers are fixedly spaced in the zone, with their spacing being a direct function of their distance from the terminal floor. The markers are detected as the elevator car proceeds past them towards the terminal floor, and a train of signals T are produced having values responsive to the marker-to-marker time, i.e., the elapsed time between successive detections of markers. The velocity V of the elevator car is also detected, and the terminal slowdown speed pattern is provided as a function of the product of V and T, as scaled by a constant which includes the square root of the desired deceleration rate.
Claims16
A speed pattern generator for providing a terminal slowdown speed pattern for an elevator car approaching a terminal floor of a building, comprising:
- a plurality of markers spaced along the slowdown approach to the terminal floor, with the spacing being a direct function of the distance of the markers from the terminal floor,
- first means for detecting said markers as the elevator car approaches the terminal floor,
- second means responsive to said first means for providing a train of signals T indicative of the marker-to-marker time,
- third means for providing a signal V responsive to the actual speed of the elevator car,
- and fourth means for providing a terminal slowdown speed pattern signal which varies as a function of the product of T and V.
A method of generating a desired terminal slowdown speed patern for an elevator car approaching a terminal floor in the terminal slowdown zone, comprising the steps of:
- providing spaced markers in the terminal slowdown zone whose spacing is a direct function of their distance from the terminal floor,
- providing a signal V responsive to the actual speed of the elevator car in the terminal slowdown zone,
- providing a train of signals T responsive to the marker-to-marker time of the elevator car,
- and providing a speed pattern as a function of the product of V and T.
Dependencies are inferred from the claim text.