Position controlled elevator door motion
US4299308A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1979 |
| Grant date | Nov 10, 1981 |
| Priority date | — |
| Expiry date | Dec 27, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45242
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elevator employing a microprocessor-based cab controller, for controlling, among other things, the opening and closing of the elevator car door, provides a pair of dictated door velocity profile signals and selects the one having the lesser value, to dictate motor current in accordance with the selected desired door motion profile. A first one of the profiles includes acceleration up to a desired maximum velocity, and a second one of the door motion profiles consists of a deceleration profile generated as a function of the distance from the door to a desired target position. An exemplary elevator system and cab controller, along with an exemplary door control program for the cab controller, establishing an environment in which the invention may suitably be practiced, and detailed program steps for effecting the present invention in such an environment are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.