Elevator safety system
US11485608B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2016 |
| Grant date | Nov 1, 2022 |
| Priority date | — |
| Expiry date | Mar 3, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B1/24
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elevator safety system includes: at least two sensors, each of the sensors being configured for monitoring at least a portion of a hoistway of an elevator system and providing monitoring signals; a transformation unit which is configured for transforming the monitoring signals provided by at least one of the sensors and producing transformed signals corresponding to a common direction of vision; a comparison unit which is configured for comparing the at least two transformed signals and for generating a failure signal if a difference between the at least two transformed signals exceeds a predetermined threshold; and a detection unit, which is configured for detecting a person or undesired item in at least one of the two transformed signals and for generating an alarm signal if a person or undesired item is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.