Elevator leveling adjustment

US5677519A · kind A · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• Peter Herkel · Berlin, DE
• Christoph M. Ernecke · Berlin, DE
• Mustapha Toutaoui · Berlin, DE
• Alberto Vecchiotti · Berlin, DE

Key dates

• Filing date: Feb 29, 1996
• Grant date: Oct 14, 1997
• Expiry date: Feb 29, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B19/007
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A method of adjusting a leveling time of an elevator car is disclosed. The method includes the steps of: moving the elevator car in a hoistway; transmitting a first signal by a first sensor in response to moving the elevator car in the hoistway; beginning a time measurement in response to detecting the first signal; transmitting a second signal by a second sensor in response to moving the elevator car in the hoistway, the second sensor being disposed a predetermined distance from the first sensor; ending the time measurement in response to detecting the second signal; determining a time measurement value in response to ending the time measurement; determining a leveling speed of the elevator car by dividing the predetermined distance between the first sensor and the second sensor by the time measurement value; and adjusting the leveling time in response to determining the leveling speed.