Elevator door monitoring system
US6988594B2 · kind B2 · utility
25Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2004 |
| Grant date | Jan 24, 2006 |
| Priority date | — |
| Expiry date | Mar 17, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/0031
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A monitoring system for monitoring doors such as a shaft or cabin door, of a lift installation includes a sensor element associated with the doors for monitoring the state or position of the door. An evaluation system is connected to the sensor element and evaluates the sensor signals. The evaluation system can perform continued evaluation in short time intervals in order to provide a continuous record of the state of the monitored doors and temporal changes in the signal characteristics of the sensor signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.