Door detection system and method
US11535494B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2018 |
| Grant date | Dec 27, 2022 |
| Priority date | — |
| Expiry date | Sep 10, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B13/08
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In an embodiment, a door detection system may include a transmitter, a receiver, a reflector, and one or more processors. The transmitter positioned on an elevator car door transmits a signal towards a reflector on a hoistway door and the reflector reflects the signal towards the receiver when the hoistway door is properly positioned with respect to the elevator door. The one or more processors determine whether the hoistway door is properly positioned with respect to the elevator car door based on the reflected signal received by the receiver. If the hoistway door is not properly positioned, the elevator car is prevented from moving. If the hoistway door is properly positioned, the elevator car is free to move.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.