Method and apparatus for determining the position of an elevator car
US10549947B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2015 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Dec 7, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/0031
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method and a system for determining the position of an elevator car of an elevator system, which car is arranged for travel in an elevator hoistway, includes equipping the elevator car with an acceleration sensor that registers acceleration data in a computing unit, calculation by the computing unit of the current position and/or of the velocity of the elevator car, and equipping the elevator system with an image-recording unit, which unit records recorded images of the elevator hoistway. The computing unit compares the recorded images with current mapping images of the elevator hoistway to determine an image-based current position of the elevator car. Finally, the computing unit undertakes a recalibration of the current position using the image-based current position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.