Method for monitoring elevator leveling performance with improved accuracy
US5889239A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1996 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Nov 4, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B7/08
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method which provides for level monitoring of an elevator car within a hoistway at a plurality of floors by providing a plurality of sensed signals which is indicative of an elevator position of the elevator car relative to a plurality of targets having a plurality of light absorptive surfaces and a plurality of light interactive regions, the plurality of targets mounted within the hoistway at the plurality of floors. The plurality of sensed signals is processed to provide a leveling variable, a floor number variable and a direction of travel variable which indicate a direction of travel of the elevator car within the hoistway. The leveling variable, floor number variable and direction of travel variable are stored at a remote elevator monitoring central processor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.