Elevator door motion bench velocity
US4342378A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1979 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Dec 27, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45242
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An elevator system includes a microprocessor-based cab controller mounted directly on an elevator car, which controls the operation of the elevator door. Elevator door motion is commanded in response to the difference in actual door velocity from a desired, dictated door velocity in accordance with desired rates of acceleration and deceleration, and desired maximum velocity, acceleration and deceleration, the point at which deceleration is to begin, and a velocity at which decleration is to decrease. The disclosed invention provides a bench velocity, a final, slow velocity, by controlling the velocity at which deceleration is to decrease, so that the acceleration vs time of the profile exceeds the deceleration vs time of the profile by an amount resulting in the desired, final bench velocity. An exemplary elevator system, an exemplary microprocessor-based controller, and logic flowcharts for an overall door control program, illustrative of an environment of the invention, as well as details of the invention, are disclosed herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.