Automatic setting of the parameters of a profile generator for a high performance elevator door system
US5378861A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1993 |
| Grant date | Jan 3, 1995 |
| Priority date | — |
| Expiry date | Feb 16, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45242
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In response to requested flight time, creep in distance, creep out distance and creep speed, a profile for opening or closing an elevator door is provided. The distance over which acceleration and deceleration must occur is the doorway distance less the distance which would be covered at the creep speed. Maximum speed is the acceleration distance over the acceleration time (1/4 of the requested flight time, to allow for jerk to both increase and decrease both acceleration and deceleration). Acceleration is the maximum speed over the acceleration time, and jerk is acceleration over the acceleration time. Actual flight time is calculated, taking into account maximum acceleration and velocity, and periods of constant acceleration and velocity, if any.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.