Elevator car position sensing system
US6701277B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2002 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Aug 21, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B1/40
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A system of sensing elevator car position is presented that dynamically compensates for problems due to frictional slippage of its mechanical connection and/or building settlement. The system comprises an elevator car within an elevator hoistway. An encoder is mounted within the elevator hoistway and mechanically connected to the elevator car. The mechanical connection drives the encoder which generates data indicative of the position of the elevator car. Either one of a position sensor and a position sensor actuator is mounted to a landing of the hoistway. The other one of the position sensor and position sensor actuator is mounted to the elevator car. The position sensor generates data indicative of the elevator car floor reaching a predetermined distance from the elevator landing when actuated by the position sensor actuator. An elevator position controller receives the data generated by both the position sensor and the encoder. The mechanical connection may include an elevator rope frictionally driving a governor sheave of an elevator speed governor system upon which the encoder is mounted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.